From: Yang Yingliang yangyingliang@huawei.com
[ Upstream commit 1662cea4623f75d8251adf07370bbaa958f0355d ]
Inject fault while loading module, kset_register() may fail. If it fails, the kset.kobj.name allocated by kobject_set_name() which must be called before a call to kset_register() may be leaked, since refcount of kobj was set in kset_init().
To mitigate this, we free the name in kset_register() when an error is encountered, i.e. when kset_register() returns an error.
A kset may be embedded in a larger structure which may be dynamically allocated in callers, it needs to be freed in ktype.release() or error path in callers, in this case, we can not call kset_put() in kset_register(), or it will cause double free, so just call kfree_const() to free the name and set it to NULL to avoid accessing bad pointer in callers.
With this fix, the callers don't need care about freeing the name and may call kset_put() if kset_register() fails.
Suggested-by: Luben Tuikov luben.tuikov@amd.com Signed-off-by: Yang Yingliang yangyingliang@huawei.com Reviewed-by: luben.tuikov@amd.com Link: https://lore.kernel.org/r/20221025071549.1280528-1-yangyingliang@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- lib/kobject.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/lib/kobject.c b/lib/kobject.c index 5f0e71ab292c..0f9cc0b93d99 100644 --- a/lib/kobject.c +++ b/lib/kobject.c @@ -834,6 +834,9 @@ EXPORT_SYMBOL_GPL(kobj_sysfs_ops); /** * kset_register() - Initialize and add a kset. * @k: kset. + * + * NOTE: On error, the kset.kobj.name allocated by() kobj_set_name() + * is freed, it can not be used any more. */ int kset_register(struct kset *k) { @@ -844,8 +847,12 @@ int kset_register(struct kset *k)
kset_init(k); err = kobject_add_internal(&k->kobj); - if (err) + if (err) { + kfree_const(k->kobj.name); + /* Set it to NULL to avoid accessing bad pointer in callers. */ + k->kobj.name = NULL; return err; + } kobject_uevent(&k->kobj, KOBJ_ADD); return 0; }
From: Alan Stern stern@rowland.harvard.edu
[ Upstream commit 7a09c1269702db8eccb6f718da2b00173e1e0034 ]
It has been pointed out that the kernel log messages warning about problems in USB configuration and related descriptors are vexing for users. The warning log level has a fairly high priority, but the user can do nothing to fix the underlying errors in the device's firmware.
To reduce the amount of useless information produced by tools that filter high-priority log messages, we can change these warnings to notices, i.e., change dev_warn() to dev_notice(). The same holds for a few messages that currently use dev_err(): Unless they indicate a failure that might make a device unusable (such as inability to transfer a config descriptor), change them to dev_notice() also.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216630 Suggested-by: Artem S. Tashkinov aros@gmx.com Signed-off-by: Alan Stern stern@rowland.harvard.edu Link: https://lore.kernel.org/r/Y2KzPx0h6z1jXCuN@rowland.harvard.edu Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/core/config.c | 82 +++++++++++++++++++-------------------- 1 file changed, 41 insertions(+), 41 deletions(-)
diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c index 48bc8a4814ac..725b8dbcfe5f 100644 --- a/drivers/usb/core/config.c +++ b/drivers/usb/core/config.c @@ -61,7 +61,7 @@ static void usb_parse_ssp_isoc_endpoint_companion(struct device *ddev, desc = (struct usb_ssp_isoc_ep_comp_descriptor *) buffer; if (desc->bDescriptorType != USB_DT_SSP_ISOC_ENDPOINT_COMP || size < USB_DT_SSP_ISOC_EP_COMP_SIZE) { - dev_warn(ddev, "Invalid SuperSpeedPlus isoc endpoint companion" + dev_notice(ddev, "Invalid SuperSpeedPlus isoc endpoint companion" "for config %d interface %d altsetting %d ep %d.\n", cfgno, inum, asnum, ep->desc.bEndpointAddress); return; @@ -83,7 +83,7 @@ static void usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno,
if (desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP || size < USB_DT_SS_EP_COMP_SIZE) { - dev_warn(ddev, "No SuperSpeed endpoint companion for config %d " + dev_notice(ddev, "No SuperSpeed endpoint companion for config %d " " interface %d altsetting %d ep %d: " "using minimum values\n", cfgno, inum, asnum, ep->desc.bEndpointAddress); @@ -109,13 +109,13 @@ static void usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno,
/* Check the various values */ if (usb_endpoint_xfer_control(&ep->desc) && desc->bMaxBurst != 0) { - dev_warn(ddev, "Control endpoint with bMaxBurst = %d in " + dev_notice(ddev, "Control endpoint with bMaxBurst = %d in " "config %d interface %d altsetting %d ep %d: " "setting to zero\n", desc->bMaxBurst, cfgno, inum, asnum, ep->desc.bEndpointAddress); ep->ss_ep_comp.bMaxBurst = 0; } else if (desc->bMaxBurst > 15) { - dev_warn(ddev, "Endpoint with bMaxBurst = %d in " + dev_notice(ddev, "Endpoint with bMaxBurst = %d in " "config %d interface %d altsetting %d ep %d: " "setting to 15\n", desc->bMaxBurst, cfgno, inum, asnum, ep->desc.bEndpointAddress); @@ -125,7 +125,7 @@ static void usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno, if ((usb_endpoint_xfer_control(&ep->desc) || usb_endpoint_xfer_int(&ep->desc)) && desc->bmAttributes != 0) { - dev_warn(ddev, "%s endpoint with bmAttributes = %d in " + dev_notice(ddev, "%s endpoint with bmAttributes = %d in " "config %d interface %d altsetting %d ep %d: " "setting to zero\n", usb_endpoint_xfer_control(&ep->desc) ? "Control" : "Bulk", @@ -134,7 +134,7 @@ static void usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno, ep->ss_ep_comp.bmAttributes = 0; } else if (usb_endpoint_xfer_bulk(&ep->desc) && desc->bmAttributes > 16) { - dev_warn(ddev, "Bulk endpoint with more than 65536 streams in " + dev_notice(ddev, "Bulk endpoint with more than 65536 streams in " "config %d interface %d altsetting %d ep %d: " "setting to max\n", cfgno, inum, asnum, ep->desc.bEndpointAddress); @@ -142,7 +142,7 @@ static void usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno, } else if (usb_endpoint_xfer_isoc(&ep->desc) && !USB_SS_SSP_ISOC_COMP(desc->bmAttributes) && USB_SS_MULT(desc->bmAttributes) > 3) { - dev_warn(ddev, "Isoc endpoint has Mult of %d in " + dev_notice(ddev, "Isoc endpoint has Mult of %d in " "config %d interface %d altsetting %d ep %d: " "setting to 3\n", USB_SS_MULT(desc->bmAttributes), @@ -160,7 +160,7 @@ static void usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno, else max_tx = 999999; if (le16_to_cpu(desc->wBytesPerInterval) > max_tx) { - dev_warn(ddev, "%s endpoint with wBytesPerInterval of %d in " + dev_notice(ddev, "%s endpoint with wBytesPerInterval of %d in " "config %d interface %d altsetting %d ep %d: " "setting to %d\n", usb_endpoint_xfer_isoc(&ep->desc) ? "Isoc" : "Int", @@ -273,7 +273,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, else if (d->bLength >= USB_DT_ENDPOINT_SIZE) n = USB_DT_ENDPOINT_SIZE; else { - dev_warn(ddev, "config %d interface %d altsetting %d has an " + dev_notice(ddev, "config %d interface %d altsetting %d has an " "invalid endpoint descriptor of length %d, skipping\n", cfgno, inum, asnum, d->bLength); goto skip_to_next_endpoint_or_interface_descriptor; @@ -281,7 +281,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno,
i = d->bEndpointAddress & ~USB_ENDPOINT_DIR_MASK; if (i >= 16 || i == 0) { - dev_warn(ddev, "config %d interface %d altsetting %d has an " + dev_notice(ddev, "config %d interface %d altsetting %d has an " "invalid endpoint with address 0x%X, skipping\n", cfgno, inum, asnum, d->bEndpointAddress); goto skip_to_next_endpoint_or_interface_descriptor; @@ -293,7 +293,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno,
/* Check for duplicate endpoint addresses */ if (config_endpoint_is_duplicate(config, inum, asnum, d)) { - dev_warn(ddev, "config %d interface %d altsetting %d has a duplicate endpoint with address 0x%X, skipping\n", + dev_notice(ddev, "config %d interface %d altsetting %d has a duplicate endpoint with address 0x%X, skipping\n", cfgno, inum, asnum, d->bEndpointAddress); goto skip_to_next_endpoint_or_interface_descriptor; } @@ -301,7 +301,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, /* Ignore some endpoints */ if (udev->quirks & USB_QUIRK_ENDPOINT_IGNORE) { if (usb_endpoint_is_ignored(udev, ifp, d)) { - dev_warn(ddev, "config %d interface %d altsetting %d has an ignored endpoint with address 0x%X, skipping\n", + dev_notice(ddev, "config %d interface %d altsetting %d has an ignored endpoint with address 0x%X, skipping\n", cfgno, inum, asnum, d->bEndpointAddress); goto skip_to_next_endpoint_or_interface_descriptor; @@ -378,7 +378,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, } } if (d->bInterval < i || d->bInterval > j) { - dev_warn(ddev, "config %d interface %d altsetting %d " + dev_notice(ddev, "config %d interface %d altsetting %d " "endpoint 0x%X has an invalid bInterval %d, " "changing to %d\n", cfgno, inum, asnum, @@ -391,7 +391,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, * them usable, we will try treating them as Interrupt endpoints. */ if (udev->speed == USB_SPEED_LOW && usb_endpoint_xfer_bulk(d)) { - dev_warn(ddev, "config %d interface %d altsetting %d " + dev_notice(ddev, "config %d interface %d altsetting %d " "endpoint 0x%X is Bulk; changing to Interrupt\n", cfgno, inum, asnum, d->bEndpointAddress); endpoint->desc.bmAttributes = USB_ENDPOINT_XFER_INT; @@ -408,7 +408,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, */ maxp = le16_to_cpu(endpoint->desc.wMaxPacketSize); if (maxp == 0 && !(usb_endpoint_xfer_isoc(d) && asnum == 0)) { - dev_warn(ddev, "config %d interface %d altsetting %d endpoint 0x%X has invalid wMaxPacketSize 0\n", + dev_notice(ddev, "config %d interface %d altsetting %d endpoint 0x%X has invalid wMaxPacketSize 0\n", cfgno, inum, asnum, d->bEndpointAddress); }
@@ -439,7 +439,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, j = maxpacket_maxes[usb_endpoint_type(&endpoint->desc)];
if (maxp > j) { - dev_warn(ddev, "config %d interface %d altsetting %d endpoint 0x%X has invalid maxpacket %d, setting to %d\n", + dev_notice(ddev, "config %d interface %d altsetting %d endpoint 0x%X has invalid maxpacket %d, setting to %d\n", cfgno, inum, asnum, d->bEndpointAddress, maxp, j); maxp = j; endpoint->desc.wMaxPacketSize = cpu_to_le16(i | maxp); @@ -452,7 +452,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, */ if (udev->speed == USB_SPEED_HIGH && usb_endpoint_xfer_bulk(d)) { if (maxp != 512) - dev_warn(ddev, "config %d interface %d altsetting %d " + dev_notice(ddev, "config %d interface %d altsetting %d " "bulk endpoint 0x%X has invalid maxpacket %d\n", cfgno, inum, asnum, d->bEndpointAddress, maxp); @@ -533,7 +533,7 @@ static int usb_parse_interface(struct device *ddev, int cfgno, i < intfc->num_altsetting; (++i, ++alt)) { if (alt->desc.bAlternateSetting == asnum) { - dev_warn(ddev, "Duplicate descriptor for config %d " + dev_notice(ddev, "Duplicate descriptor for config %d " "interface %d altsetting %d, skipping\n", cfgno, inum, asnum); goto skip_to_next_interface_descriptor; @@ -559,7 +559,7 @@ static int usb_parse_interface(struct device *ddev, int cfgno, num_ep = num_ep_orig = alt->desc.bNumEndpoints; alt->desc.bNumEndpoints = 0; /* Use as a counter */ if (num_ep > USB_MAXENDPOINTS) { - dev_warn(ddev, "too many endpoints for config %d interface %d " + dev_notice(ddev, "too many endpoints for config %d interface %d " "altsetting %d: %d, using maximum allowed: %d\n", cfgno, inum, asnum, num_ep, USB_MAXENDPOINTS); num_ep = USB_MAXENDPOINTS; @@ -590,7 +590,7 @@ static int usb_parse_interface(struct device *ddev, int cfgno, }
if (n != num_ep_orig) - dev_warn(ddev, "config %d interface %d altsetting %d has %d " + dev_notice(ddev, "config %d interface %d altsetting %d has %d " "endpoint descriptor%s, different from the interface " "descriptor's value: %d\n", cfgno, inum, asnum, n, plural(n), num_ep_orig); @@ -625,7 +625,7 @@ static int usb_parse_configuration(struct usb_device *dev, int cfgidx, if (config->desc.bDescriptorType != USB_DT_CONFIG || config->desc.bLength < USB_DT_CONFIG_SIZE || config->desc.bLength > size) { - dev_err(ddev, "invalid descriptor for config index %d: " + dev_notice(ddev, "invalid descriptor for config index %d: " "type = 0x%X, length = %d\n", cfgidx, config->desc.bDescriptorType, config->desc.bLength); return -EINVAL; @@ -636,7 +636,7 @@ static int usb_parse_configuration(struct usb_device *dev, int cfgidx, size -= config->desc.bLength;
if (nintf > USB_MAXINTERFACES) { - dev_warn(ddev, "config %d has too many interfaces: %d, " + dev_notice(ddev, "config %d has too many interfaces: %d, " "using maximum allowed: %d\n", cfgno, nintf, USB_MAXINTERFACES); nintf = USB_MAXINTERFACES; @@ -650,7 +650,7 @@ static int usb_parse_configuration(struct usb_device *dev, int cfgidx, (buffer2 += header->bLength, size2 -= header->bLength)) {
if (size2 < sizeof(struct usb_descriptor_header)) { - dev_warn(ddev, "config %d descriptor has %d excess " + dev_notice(ddev, "config %d descriptor has %d excess " "byte%s, ignoring\n", cfgno, size2, plural(size2)); break; @@ -658,7 +658,7 @@ static int usb_parse_configuration(struct usb_device *dev, int cfgidx,
header = (struct usb_descriptor_header *) buffer2; if ((header->bLength > size2) || (header->bLength < 2)) { - dev_warn(ddev, "config %d has an invalid descriptor " + dev_notice(ddev, "config %d has an invalid descriptor " "of length %d, skipping remainder of the config\n", cfgno, header->bLength); break; @@ -670,7 +670,7 @@ static int usb_parse_configuration(struct usb_device *dev, int cfgidx,
d = (struct usb_interface_descriptor *) header; if (d->bLength < USB_DT_INTERFACE_SIZE) { - dev_warn(ddev, "config %d has an invalid " + dev_notice(ddev, "config %d has an invalid " "interface descriptor of length %d, " "skipping\n", cfgno, d->bLength); continue; @@ -680,7 +680,7 @@ static int usb_parse_configuration(struct usb_device *dev, int cfgidx,
if ((dev->quirks & USB_QUIRK_HONOR_BNUMINTERFACES) && n >= nintf_orig) { - dev_warn(ddev, "config %d has more interface " + dev_notice(ddev, "config %d has more interface " "descriptors, than it declares in " "bNumInterfaces, ignoring interface " "number: %d\n", cfgno, inum); @@ -688,7 +688,7 @@ static int usb_parse_configuration(struct usb_device *dev, int cfgidx, }
if (inum >= nintf_orig) - dev_warn(ddev, "config %d has an invalid " + dev_notice(ddev, "config %d has an invalid " "interface number: %d but max is %d\n", cfgno, inum, nintf_orig - 1);
@@ -713,14 +713,14 @@ static int usb_parse_configuration(struct usb_device *dev, int cfgidx,
d = (struct usb_interface_assoc_descriptor *)header; if (d->bLength < USB_DT_INTERFACE_ASSOCIATION_SIZE) { - dev_warn(ddev, + dev_notice(ddev, "config %d has an invalid interface association descriptor of length %d, skipping\n", cfgno, d->bLength); continue; }
if (iad_num == USB_MAXIADS) { - dev_warn(ddev, "found more Interface " + dev_notice(ddev, "found more Interface " "Association Descriptors " "than allocated for in " "configuration %d\n", cfgno); @@ -731,7 +731,7 @@ static int usb_parse_configuration(struct usb_device *dev, int cfgidx,
} else if (header->bDescriptorType == USB_DT_DEVICE || header->bDescriptorType == USB_DT_CONFIG) - dev_warn(ddev, "config %d contains an unexpected " + dev_notice(ddev, "config %d contains an unexpected " "descriptor of type 0x%X, skipping\n", cfgno, header->bDescriptorType);
@@ -740,11 +740,11 @@ static int usb_parse_configuration(struct usb_device *dev, int cfgidx, config->desc.wTotalLength = cpu_to_le16(buffer2 - buffer0);
if (n != nintf) - dev_warn(ddev, "config %d has %d interface%s, different from " + dev_notice(ddev, "config %d has %d interface%s, different from " "the descriptor's value: %d\n", cfgno, n, plural(n), nintf_orig); else if (n == 0) - dev_warn(ddev, "config %d has no interfaces?\n", cfgno); + dev_notice(ddev, "config %d has no interfaces?\n", cfgno); config->desc.bNumInterfaces = nintf = n;
/* Check for missing interface numbers */ @@ -754,7 +754,7 @@ static int usb_parse_configuration(struct usb_device *dev, int cfgidx, break; } if (j >= nintf) - dev_warn(ddev, "config %d has no interface number " + dev_notice(ddev, "config %d has no interface number " "%d\n", cfgno, i); }
@@ -762,7 +762,7 @@ static int usb_parse_configuration(struct usb_device *dev, int cfgidx, for (i = 0; i < nintf; ++i) { j = nalts[i]; if (j > USB_MAXALTSETTING) { - dev_warn(ddev, "too many alternate settings for " + dev_notice(ddev, "too many alternate settings for " "config %d interface %d: %d, " "using maximum allowed: %d\n", cfgno, inums[i], j, USB_MAXALTSETTING); @@ -811,7 +811,7 @@ static int usb_parse_configuration(struct usb_device *dev, int cfgidx, break; } if (n >= intfc->num_altsetting) - dev_warn(ddev, "config %d interface %d has no " + dev_notice(ddev, "config %d interface %d has no " "altsetting %d\n", cfgno, inums[i], j); } } @@ -868,7 +868,7 @@ int usb_get_configuration(struct usb_device *dev) int result;
if (ncfg > USB_MAXCONFIG) { - dev_warn(ddev, "too many configurations: %d, " + dev_notice(ddev, "too many configurations: %d, " "using maximum allowed: %d\n", ncfg, USB_MAXCONFIG); dev->descriptor.bNumConfigurations = ncfg = USB_MAXCONFIG; } @@ -902,7 +902,7 @@ int usb_get_configuration(struct usb_device *dev) "descriptor/%s: %d\n", cfgno, "start", result); if (result != -EPIPE) goto err; - dev_err(ddev, "chopping to %d config(s)\n", cfgno); + dev_notice(ddev, "chopping to %d config(s)\n", cfgno); dev->descriptor.bNumConfigurations = cfgno; break; } else if (result < 4) { @@ -934,7 +934,7 @@ int usb_get_configuration(struct usb_device *dev) goto err; } if (result < length) { - dev_warn(ddev, "config index %d descriptor too short " + dev_notice(ddev, "config index %d descriptor too short " "(expected %i, got %i)\n", cfgno, length, result); length = result; } @@ -993,7 +993,7 @@ int usb_get_bos_descriptor(struct usb_device *dev) /* Get BOS descriptor */ ret = usb_get_descriptor(dev, USB_DT_BOS, 0, bos, USB_DT_BOS_SIZE); if (ret < USB_DT_BOS_SIZE || bos->bLength < USB_DT_BOS_SIZE) { - dev_err(ddev, "unable to get BOS descriptor or descriptor too short\n"); + dev_notice(ddev, "unable to get BOS descriptor or descriptor too short\n"); if (ret >= 0) ret = -ENOMSG; kfree(bos); @@ -1021,7 +1021,7 @@ int usb_get_bos_descriptor(struct usb_device *dev)
ret = usb_get_descriptor(dev, USB_DT_BOS, 0, buffer, total_len); if (ret < total_len) { - dev_err(ddev, "unable to get BOS descriptor set\n"); + dev_notice(ddev, "unable to get BOS descriptor set\n"); if (ret >= 0) ret = -ENOMSG; goto err; @@ -1046,7 +1046,7 @@ int usb_get_bos_descriptor(struct usb_device *dev) }
if (cap->bDescriptorType != USB_DT_DEVICE_CAPABILITY) { - dev_warn(ddev, "descriptor type invalid, skip\n"); + dev_notice(ddev, "descriptor type invalid, skip\n"); continue; }
From: Ray Chi raychi@google.com
[ Upstream commit 430d57f53eb1cdbf9ba9bbd397317912b3cd2de5 ]
When a broken USB accessory connects to a USB host, usbcore might keep doing enumeration retries. If the host has a watchdog mechanism, the kernel panic will happen on the host.
This patch provides an attribute early_stop to limit the numbers of retries for each port of a hub. If a port was marked with early_stop attribute, unsuccessful connection attempts will fail quickly. In addition, if an early_stop port has failed to initialize, it will ignore all future connection events until early_stop attribute is clear.
Signed-off-by: Ray Chi raychi@google.com Reviewed-by: Alan Stern stern@rowland.harvard.edu Link: https://lore.kernel.org/r/20221107072754.3336357-1-raychi@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- Documentation/ABI/testing/sysfs-bus-usb | 11 +++++ drivers/usb/core/hub.c | 60 +++++++++++++++++++++++++ drivers/usb/core/hub.h | 4 ++ drivers/usb/core/port.c | 27 +++++++++++ 4 files changed, 102 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb index 568103d3376e..545c2dd97ed0 100644 --- a/Documentation/ABI/testing/sysfs-bus-usb +++ b/Documentation/ABI/testing/sysfs-bus-usb @@ -264,6 +264,17 @@ Description: attached to the port will not be detected, initialized, or enumerated.
+What: /sys/bus/usb/devices/.../<hub_interface>/port<X>/early_stop +Date: Sep 2022 +Contact: Ray Chi raychi@google.com +Description: + Some USB hosts have some watchdog mechanisms so that the device + may enter ramdump if it takes a long time during port initialization. + This attribute allows each port just has two attempts so that the + port initialization will be failed quickly. In addition, if a port + which is marked with early_stop has failed to initialize, it will ignore + all future connections until this attribute is clear. + What: /sys/bus/usb/devices/.../power/usb2_lpm_l1_timeout Date: May 2013 Contact: Mathias Nyman mathias.nyman@linux.intel.com diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index bbab424b0d55..77e73fc8d673 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -3081,6 +3081,48 @@ static int hub_port_reset(struct usb_hub *hub, int port1, return status; }
+/* + * hub_port_stop_enumerate - stop USB enumeration or ignore port events + * @hub: target hub + * @port1: port num of the port + * @retries: port retries number of hub_port_init() + * + * Return: + * true: ignore port actions/events or give up connection attempts. + * false: keep original behavior. + * + * This function will be based on retries to check whether the port which is + * marked with early_stop attribute would stop enumeration or ignore events. + * + * Note: + * This function didn't change anything if early_stop is not set, and it will + * prevent all connection attempts when early_stop is set and the attempts of + * the port are more than 1. + */ +static bool hub_port_stop_enumerate(struct usb_hub *hub, int port1, int retries) +{ + struct usb_port *port_dev = hub->ports[port1 - 1]; + + if (port_dev->early_stop) { + if (port_dev->ignore_event) + return true; + + /* + * We want unsuccessful attempts to fail quickly. + * Since some devices may need one failure during + * port initialization, we allow two tries but no + * more. + */ + if (retries < 2) + return false; + + port_dev->ignore_event = 1; + } else + port_dev->ignore_event = 0; + + return port_dev->ignore_event; +} + /* Check if a port is power on */ int usb_port_is_power_on(struct usb_hub *hub, unsigned int portstatus) { @@ -4796,6 +4838,11 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1, do_new_scheme = use_new_scheme(udev, retry_counter, port_dev);
for (retries = 0; retries < GET_DESCRIPTOR_TRIES; (++retries, msleep(100))) { + if (hub_port_stop_enumerate(hub, port1, retries)) { + retval = -ENODEV; + break; + } + if (do_new_scheme) { struct usb_device_descriptor *buf; int r = 0; @@ -5246,6 +5293,11 @@ static void hub_port_connect(struct usb_hub *hub, int port1, u16 portstatus, status = 0;
for (i = 0; i < PORT_INIT_TRIES; i++) { + if (hub_port_stop_enumerate(hub, port1, i)) { + status = -ENODEV; + break; + } + usb_lock_port(port_dev); mutex_lock(hcd->address0_mutex); retry_locked = true; @@ -5614,6 +5666,10 @@ static void port_event(struct usb_hub *hub, int port1) if (!pm_runtime_active(&port_dev->dev)) return;
+ /* skip port actions if ignore_event and early_stop are true */ + if (port_dev->ignore_event && port_dev->early_stop) + return; + if (hub_handle_remote_wakeup(hub, port1, portstatus, portchange)) connect_change = 1;
@@ -5927,6 +5983,10 @@ static int usb_reset_and_verify_device(struct usb_device *udev) mutex_lock(hcd->address0_mutex);
for (i = 0; i < PORT_INIT_TRIES; ++i) { + if (hub_port_stop_enumerate(parent_hub, port1, i)) { + ret = -ENODEV; + break; + }
/* ep0 maxpacket size may change; let the HCD know about it. * Other endpoints will be handled by re-enumeration. */ diff --git a/drivers/usb/core/hub.h b/drivers/usb/core/hub.h index b2925856b4cb..e23833562e4f 100644 --- a/drivers/usb/core/hub.h +++ b/drivers/usb/core/hub.h @@ -90,6 +90,8 @@ struct usb_hub { * @is_superspeed cache super-speed status * @usb3_lpm_u1_permit: whether USB3 U1 LPM is permitted. * @usb3_lpm_u2_permit: whether USB3 U2 LPM is permitted. + * @early_stop: whether port initialization will be stopped earlier. + * @ignore_event: whether events of the port are ignored. */ struct usb_port { struct usb_device *child; @@ -103,6 +105,8 @@ struct usb_port { u32 over_current_count; u8 portnum; u32 quirks; + unsigned int early_stop:1; + unsigned int ignore_event:1; unsigned int is_superspeed:1; unsigned int usb3_lpm_u1_permit:1; unsigned int usb3_lpm_u2_permit:1; diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c index 38c1a4f4fdea..126da9408359 100644 --- a/drivers/usb/core/port.c +++ b/drivers/usb/core/port.c @@ -17,6 +17,32 @@ static int usb_port_block_power_off;
static const struct attribute_group *port_dev_group[];
+static ssize_t early_stop_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct usb_port *port_dev = to_usb_port(dev); + + return sysfs_emit(buf, "%s\n", port_dev->early_stop ? "yes" : "no"); +} + +static ssize_t early_stop_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct usb_port *port_dev = to_usb_port(dev); + bool value; + + if (kstrtobool(buf, &value)) + return -EINVAL; + + if (value) + port_dev->early_stop = 1; + else + port_dev->early_stop = 0; + + return count; +} +static DEVICE_ATTR_RW(early_stop); + static ssize_t disable_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -236,6 +262,7 @@ static struct attribute *port_dev_attrs[] = { &dev_attr_quirks.attr, &dev_attr_over_current_count.attr, &dev_attr_disable.attr, + &dev_attr_early_stop.attr, NULL, };
From: Henry Tian tianxiaofeng@bytedance.com
[ Upstream commit 83045e19feae937c425248824d1dc0fc95583842 ]
In ast_vhub_epn_handle_ack() when the received data length exceeds the buffer, it does not check the case and just copies to req.buf and cause a buffer overflow, kernel oops on this case.
This issue could be reproduced on a BMC with an OS that enables the lan over USB: 1. In OS, enable the usb eth dev, verify it pings the BMC OK; 2. In OS, set the usb dev mtu to 2000. (Default is 1500); 3. In OS, ping the BMC with `-s 2000` argument.
The BMC kernel will get oops with below logs:
skbuff: skb_over_panic: text:8058e098 len:2048 put:2048 head:84c678a0 data:84c678c2 tail:0x84c680c2 end:0x84c67f00 dev:usb0 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:113! Internal error: Oops - BUG: 0 [#1] ARM CPU: 0 PID: 0 Comm: swapper Not tainted 5.15.69-c9fb275-dirty-d1e579a #1 Hardware name: Generic DT based system PC is at skb_panic+0x60/0x6c LR is at irq_work_queue+0x6c/0x94
Fix the issue by checking the length and set `-EOVERFLOW`.
Tested: Verify the BMC kernel does not get oops in the above case, and the usb ethernet gets RX packets errors instead.
Signed-off-by: Lei YU yulei.sh@bytedance.com Signed-off-by: Henry Tian tianxiaofeng@bytedance.com Reviewed-by: Neal Liu neal_liu@aspeedtech.com Acked-by: Benjamin Herrenschmidt benh@kernel.crashing.org Link: https://lore.kernel.org/r/20221024094853.2877441-1-yulei.sh@bytedance.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/gadget/udc/aspeed-vhub/core.c | 2 +- drivers/usb/gadget/udc/aspeed-vhub/epn.c | 16 ++++++++++++---- 2 files changed, 13 insertions(+), 5 deletions(-)
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c b/drivers/usb/gadget/udc/aspeed-vhub/core.c index 7a635c499777..ac3ca24f8b04 100644 --- a/drivers/usb/gadget/udc/aspeed-vhub/core.c +++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c @@ -37,7 +37,7 @@ void ast_vhub_done(struct ast_vhub_ep *ep, struct ast_vhub_req *req,
list_del_init(&req->queue);
- if (req->req.status == -EINPROGRESS) + if ((req->req.status == -EINPROGRESS) || (status == -EOVERFLOW)) req->req.status = status;
if (req->req.dma) { diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c index b5252880b389..56e55472daa1 100644 --- a/drivers/usb/gadget/udc/aspeed-vhub/epn.c +++ b/drivers/usb/gadget/udc/aspeed-vhub/epn.c @@ -84,6 +84,7 @@ static void ast_vhub_epn_handle_ack(struct ast_vhub_ep *ep) { struct ast_vhub_req *req; unsigned int len; + int status = 0; u32 stat;
/* Read EP status */ @@ -119,9 +120,15 @@ static void ast_vhub_epn_handle_ack(struct ast_vhub_ep *ep) len = VHUB_EP_DMA_TX_SIZE(stat);
/* If not using DMA, copy data out if needed */ - if (!req->req.dma && !ep->epn.is_in && len) - memcpy(req->req.buf + req->req.actual, ep->buf, len); - + if (!req->req.dma && !ep->epn.is_in && len) { + if (req->req.actual + len > req->req.length) { + req->last_desc = 1; + status = -EOVERFLOW; + goto done; + } else { + memcpy(req->req.buf + req->req.actual, ep->buf, len); + } + } /* Adjust size */ req->req.actual += len;
@@ -129,9 +136,10 @@ static void ast_vhub_epn_handle_ack(struct ast_vhub_ep *ep) if (len < ep->ep.maxpacket) req->last_desc = 1;
+done: /* That's it ? complete the request and pick a new one */ if (req->last_desc >= 0) { - ast_vhub_done(ep, req, 0); + ast_vhub_done(ep, req, status); req = list_first_entry_or_null(&ep->queue, struct ast_vhub_req, queue);
From: Sascha Hauer s.hauer@pengutronix.de
[ Upstream commit 321b59870f850a10dbb211ecd2bd87b41497ea6f ]
The UDC is not a suitable parent of the net device as the UDC can change or vanish during the lifecycle of the ethernet gadget. This can be illustrated with the following:
mkdir -p /sys/kernel/config/usb_gadget/mygadget cd /sys/kernel/config/usb_gadget/mygadget mkdir -p configs/c.1/strings/0x409 echo "C1:Composite Device" > configs/c.1/strings/0x409/configuration mkdir -p functions/ecm.usb0 ln -s functions/ecm.usb0 configs/c.1/ echo "dummy_udc.0" > UDC rmmod dummy_hcd
The 'rmmod' removes the UDC from the just created gadget, leaving the still existing net device with a no longer existing parent.
Accessing the ethernet device with commands like:
ip --details link show usb0
will result in a KASAN splat:
================================================================== BUG: KASAN: use-after-free in if_nlmsg_size+0x3e8/0x528 Read of size 4 at addr c5c84754 by task ip/357
CPU: 3 PID: 357 Comm: ip Not tainted 6.1.0-rc3-00013-gd14953726b24-dirty #324 Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree) unwind_backtrace from show_stack+0x10/0x14 show_stack from dump_stack_lvl+0x58/0x70 dump_stack_lvl from print_report+0x134/0x4d4 print_report from kasan_report+0x78/0x10c kasan_report from if_nlmsg_size+0x3e8/0x528 if_nlmsg_size from rtnl_getlink+0x2b4/0x4d0 rtnl_getlink from rtnetlink_rcv_msg+0x1f4/0x674 rtnetlink_rcv_msg from netlink_rcv_skb+0xb4/0x1f8 netlink_rcv_skb from netlink_unicast+0x294/0x478 netlink_unicast from netlink_sendmsg+0x328/0x640 netlink_sendmsg from ____sys_sendmsg+0x2a4/0x3b4 ____sys_sendmsg from ___sys_sendmsg+0xc8/0x12c ___sys_sendmsg from sys_sendmsg+0xa0/0x120 sys_sendmsg from ret_fast_syscall+0x0/0x1c
Solve this by not setting the parent of the ethernet device.
Signed-off-by: Sascha Hauer s.hauer@pengutronix.de Link: https://lore.kernel.org/r/20221104131031.850850-2-s.hauer@pengutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/gadget/function/u_ether.c | 4 ---- 1 file changed, 4 deletions(-)
diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c index 7887def05dc2..8a009493f24a 100644 --- a/drivers/usb/gadget/function/u_ether.c +++ b/drivers/usb/gadget/function/u_ether.c @@ -798,7 +798,6 @@ struct eth_dev *gether_setup_name(struct usb_gadget *g, net->max_mtu = GETHER_MAX_MTU_SIZE;
dev->gadget = g; - SET_NETDEV_DEV(net, &g->dev); SET_NETDEV_DEVTYPE(net, &gadget_type);
status = register_netdev(net); @@ -873,8 +872,6 @@ int gether_register_netdev(struct net_device *net) struct usb_gadget *g; int status;
- if (!net->dev.parent) - return -EINVAL; dev = netdev_priv(net); g = dev->gadget;
@@ -905,7 +902,6 @@ void gether_set_gadget(struct net_device *net, struct usb_gadget *g)
dev = netdev_priv(net); dev->gadget = g; - SET_NETDEV_DEV(net, &g->dev); } EXPORT_SYMBOL_GPL(gether_set_gadget);
From: Sascha Hauer s.hauer@pengutronix.de
[ Upstream commit d65e6b6e884a38360fc1cadf8ff31858151da57f ]
The gadget may change over bind/unbind cycles, so set it each time during bind, not only the first time. Without it we get a use-after-free with the following example:
cd /sys/kernel/config/usb_gadget/; mkdir -p mygadget; cd mygadget mkdir -p configs/c.1/strings/0x409 echo "C1:Composite Device" > configs/c.1/strings/0x409/configuration mkdir -p functions/ecm.usb0 ln -s functions/ecm.usb0 configs/c.1/ rmmod dummy_hcd modprobe dummy_hcd
KASAN will complain shortly after the 'modprobe':
usb 2-1: New USB device found, idVendor=0000, idProduct=0000, bcdDevice= 6.01 usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 ================================================================== BUG: KASAN: use-after-free in gether_connect+0xb8/0x30c Read of size 4 at addr cbef170c by task swapper/3/0
CPU: 3 PID: 0 Comm: swapper/3 Not tainted 6.1.0-rc3-00014-g41ff012f50cb-dirty #322 Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree) unwind_backtrace from show_stack+0x10/0x14 show_stack from dump_stack_lvl+0x58/0x70 dump_stack_lvl from print_report+0x134/0x4d4 print_report from kasan_report+0x78/0x10c kasan_report from gether_connect+0xb8/0x30c gether_connect from ecm_set_alt+0x124/0x254 ecm_set_alt from composite_setup+0xb98/0x2b18 composite_setup from configfs_composite_setup+0x80/0x98 configfs_composite_setup from dummy_timer+0x8f0/0x14a0 [dummy_hcd] ...
Signed-off-by: Sascha Hauer s.hauer@pengutronix.de Link: https://lore.kernel.org/r/20221104131031.850850-3-s.hauer@pengutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/gadget/function/f_ecm.c | 22 +++++++++------------- 1 file changed, 9 insertions(+), 13 deletions(-)
diff --git a/drivers/usb/gadget/function/f_ecm.c b/drivers/usb/gadget/function/f_ecm.c index ffe2486fce71..a7ab30e603e2 100644 --- a/drivers/usb/gadget/function/f_ecm.c +++ b/drivers/usb/gadget/function/f_ecm.c @@ -685,7 +685,7 @@ ecm_bind(struct usb_configuration *c, struct usb_function *f) struct usb_composite_dev *cdev = c->cdev; struct f_ecm *ecm = func_to_ecm(f); struct usb_string *us; - int status; + int status = 0; struct usb_ep *ep;
struct f_ecm_opts *ecm_opts; @@ -695,23 +695,19 @@ ecm_bind(struct usb_configuration *c, struct usb_function *f)
ecm_opts = container_of(f->fi, struct f_ecm_opts, func_inst);
- /* - * in drivers/usb/gadget/configfs.c:configfs_composite_bind() - * configurations are bound in sequence with list_for_each_entry, - * in each configuration its functions are bound in sequence - * with list_for_each_entry, so we assume no race condition - * with regard to ecm_opts->bound access - */ + mutex_lock(&ecm_opts->lock); + + gether_set_gadget(ecm_opts->net, cdev->gadget); + if (!ecm_opts->bound) { - mutex_lock(&ecm_opts->lock); - gether_set_gadget(ecm_opts->net, cdev->gadget); status = gether_register_netdev(ecm_opts->net); - mutex_unlock(&ecm_opts->lock); - if (status) - return status; ecm_opts->bound = true; }
+ mutex_unlock(&ecm_opts->lock); + if (status) + return status; + ecm_string_defs[1].s = ecm->ethaddr;
us = usb_gstrings_attach(cdev, ecm_strings,
From: Shang XiaoJing shangxiaojing@huawei.com
[ Upstream commit 4634c973096a64662a24d9914c47cebc2a8b72f4 ]
Some init function of cdev(like comedi) will call kobject_set_name() before cdev_add(), but won't free the cdev.kobj.name or put the ref cnt of cdev.kobj when cdev_add() failed. As the result, cdev.kobj.name will be leaked.
Free the name of kobject in cdev_add() fail path to prevent memleak. With this fix, the callers don't need to care about freeing the name of kobject if cdev_add() fails.
unreferenced object 0xffff8881000fa8c0 (size 8): comm "modprobe", pid 239, jiffies 4294905173 (age 51.308s) hex dump (first 8 bytes): 63 6f 6d 65 64 69 00 ff comedi.. backtrace: [<000000005f9878f7>] __kmalloc_node_track_caller+0x4c/0x1c0 [<000000000fd70302>] kstrdup+0x3f/0x70 [<000000009428bc33>] kstrdup_const+0x46/0x60 [<00000000ed50d9de>] kvasprintf_const+0xdb/0xf0 [<00000000b2766964>] kobject_set_name_vargs+0x3c/0xe0 [<00000000f2424ef7>] kobject_set_name+0x62/0x90 [<000000005d5a125b>] 0xffffffffa0013098 [<00000000f331e663>] do_one_initcall+0x7a/0x380 [<00000000aa7bac96>] do_init_module+0x5c/0x230 [<000000005fd72335>] load_module+0x227d/0x2420 [<00000000ad550cf1>] __do_sys_finit_module+0xd5/0x140 [<00000000069a60c5>] do_syscall_64+0x3f/0x90 [<00000000c5e0d521>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
Suggested-by: Greg KH gregkh@linuxfoundation.org Signed-off-by: Shang XiaoJing shangxiaojing@huawei.com Link: https://lore.kernel.org/r/20221102072659.23671-1-shangxiaojing@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/char_dev.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/fs/char_dev.c b/fs/char_dev.c index ba0ded7842a7..340e4543b24a 100644 --- a/fs/char_dev.c +++ b/fs/char_dev.c @@ -483,17 +483,24 @@ int cdev_add(struct cdev *p, dev_t dev, unsigned count) p->dev = dev; p->count = count;
- if (WARN_ON(dev == WHITEOUT_DEV)) - return -EBUSY; + if (WARN_ON(dev == WHITEOUT_DEV)) { + error = -EBUSY; + goto err; + }
error = kobj_map(cdev_map, dev, count, NULL, exact_match, exact_lock, p); if (error) - return error; + goto err;
kobject_get(p->kobj.parent);
return 0; + +err: + kfree_const(p->kobj.name); + p->kobj.name = NULL; + return error; }
/**
From: Shuah Khan skhan@linuxfoundation.org
[ Upstream commit dd65a243a915ca319ed5fee9161a168c836fa2f2 ]
Fix v_recv_cmd_submit() to use PIPE_BULK define instead of hard coded values. This also fixes the following signed integer overflow error reported by cppcheck. This is not an issue since pipe is unsigned int. However, this change improves the code to use proper define.
drivers/usb/usbip/vudc_rx.c:152:26: error: Signed integer overflow for expression '3<<30'. [integerOverflow] urb_p->urb->pipe &= ~(3 << 30);
In addition, add a build time check for PIPE_BULK != 3 as the code path depends on PIPE_BULK = 3.
Signed-off-by: Shuah Khan skhan@linuxfoundation.org Link: https://lore.kernel.org/r/20221110194738.38514-1-skhan@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/usbip/vudc_rx.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/usbip/vudc_rx.c b/drivers/usb/usbip/vudc_rx.c index d4a2f30a7580..51bb70837b90 100644 --- a/drivers/usb/usbip/vudc_rx.c +++ b/drivers/usb/usbip/vudc_rx.c @@ -149,7 +149,9 @@ static int v_recv_cmd_submit(struct vudc *udc, urb_p->urb->status = -EINPROGRESS;
/* FIXME: more pipe setup to please usbip_common */ - urb_p->urb->pipe &= ~(3 << 30); + BUILD_BUG_ON_MSG(PIPE_BULK != 3, "PIPE_* doesn't range from 0 to 3"); + + urb_p->urb->pipe &= ~(PIPE_BULK << 30); switch (urb_p->ep->type) { case USB_ENDPOINT_XFER_BULK: urb_p->urb->pipe |= (PIPE_BULK << 30);
From: Eli Billauer eli.billauer@gmail.com
[ Upstream commit 282a4b71816b6076029017a7bab3a9dcee12a920 ]
The driver for XillyUSB devices maintains a kref reference count on each xillyusb_dev structure, which represents a physical device. This reference count reaches zero when the device has been disconnected and there are no open file descriptors that are related to the device. When this occurs, kref_put() calls cleanup_dev(), which clears up the device's data, including the structure itself.
However, when xillyusb_open() is called, this reference count becomes tricky: This function needs to obtain the xillyusb_dev structure that relates to the inode's major and minor (as there can be several such). xillybus_find_inode() (which is defined in xillybus_class.c) is called for this purpose. xillybus_find_inode() holds a mutex that is global in xillybus_class.c to protect the list of devices, and releases this mutex before returning. As a result, nothing protects the xillyusb_dev's reference counter from being decremented to zero before xillyusb_open() increments it on its own behalf. Hence the structure can be freed due to a rare race condition.
To solve this, a mutex is added. It is locked by xillyusb_open() before the call to xillybus_find_inode() and is released only after the kref counter has been incremented on behalf of the newly opened inode. This protects the kref reference counters of all xillyusb_dev structs from being decremented by xillyusb_disconnect() during this time segment, as the call to kref_put() in this function is done with the same lock held.
There is no need to hold the lock on other calls to kref_put(), because if xillybus_find_inode() finds a struct, xillyusb_disconnect() has not made the call to remove it, and hence not made its call to kref_put(), which takes place afterwards. Hence preventing xillyusb_disconnect's call to kref_put() is enough to ensure that the reference doesn't reach zero before it's incremented by xillyusb_open().
It would have been more natural to increment the reference count in xillybus_find_inode() of course, however this function is also called by Xillybus' driver for PCIe / OF, which registers a completely different structure. Therefore, xillybus_find_inode() treats these structures as void pointers, and accordingly can't make any changes.
Reported-by: Hyunwoo Kim imv4bel@gmail.com Suggested-by: Alan Stern stern@rowland.harvard.edu Signed-off-by: Eli Billauer eli.billauer@gmail.com Link: https://lore.kernel.org/r/20221030094209.65916-1-eli.billauer@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/char/xillybus/xillyusb.c | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-)
diff --git a/drivers/char/xillybus/xillyusb.c b/drivers/char/xillybus/xillyusb.c index 39bcbfd908b4..5a5afa14ca8c 100644 --- a/drivers/char/xillybus/xillyusb.c +++ b/drivers/char/xillybus/xillyusb.c @@ -184,6 +184,14 @@ struct xillyusb_dev { struct mutex process_in_mutex; /* synchronize wakeup_all() */ };
+/* + * kref_mutex is used in xillyusb_open() to prevent the xillyusb_dev + * struct from being freed during the gap between being found by + * xillybus_find_inode() and having its reference count incremented. + */ + +static DEFINE_MUTEX(kref_mutex); + /* FPGA to host opcodes */ enum { OPCODE_DATA = 0, @@ -1237,9 +1245,16 @@ static int xillyusb_open(struct inode *inode, struct file *filp) int rc; int index;
+ mutex_lock(&kref_mutex); + rc = xillybus_find_inode(inode, (void **)&xdev, &index); - if (rc) + if (rc) { + mutex_unlock(&kref_mutex); return rc; + } + + kref_get(&xdev->kref); + mutex_unlock(&kref_mutex);
chan = &xdev->channels[index]; filp->private_data = chan; @@ -1275,8 +1290,6 @@ static int xillyusb_open(struct inode *inode, struct file *filp) ((filp->f_mode & FMODE_WRITE) && chan->open_for_write)) goto unmutex_fail;
- kref_get(&xdev->kref); - if (filp->f_mode & FMODE_READ) chan->open_for_read = 1;
@@ -1413,6 +1426,7 @@ static int xillyusb_open(struct inode *inode, struct file *filp) return rc;
unmutex_fail: + kref_put(&xdev->kref, cleanup_dev); mutex_unlock(&chan->lock); return rc; } @@ -2227,7 +2241,9 @@ static void xillyusb_disconnect(struct usb_interface *interface)
xdev->dev = NULL;
+ mutex_lock(&kref_mutex); kref_put(&xdev->kref, cleanup_dev); + mutex_unlock(&kref_mutex); }
static struct usb_driver xillyusb_driver = {
From: farah kassabri fkassabri@habana.ai
[ Upstream commit 679e968908a4997d02c2a7df294e97b066f9149f ]
To avoid memory corruption in kernel memory while using timestamp registration nodes, zero the kernel buff memory when its allocated.
Signed-off-by: farah kassabri fkassabri@habana.ai Reviewed-by: Oded Gabbay ogabbay@kernel.org Signed-off-by: Oded Gabbay ogabbay@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/misc/habanalabs/common/memory.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/misc/habanalabs/common/memory.c b/drivers/misc/habanalabs/common/memory.c index 61bc1bfe984a..751f8c751b72 100644 --- a/drivers/misc/habanalabs/common/memory.c +++ b/drivers/misc/habanalabs/common/memory.c @@ -2097,7 +2097,7 @@ static int hl_ts_alloc_buf(struct hl_mmap_mem_buf *buf, gfp_t gfp, void *args)
/* Allocate the internal kernel buffer */ size = num_elements * sizeof(struct hl_user_pending_interrupt); - p = vmalloc(size); + p = vzalloc(size); if (!p) goto free_user_buff;
From: Eli Billauer eli.billauer@gmail.com
[ Upstream commit c002f04c0bc79ec00d4beb75fb631d5bf37419bd ]
@unit_mutex protects @unit from being freed, so obviously it should be released after @unit is used, and not before.
This is a follow-up to commit 282a4b71816b ("char: xillybus: Prevent use-after-free due to race condition") which ensures, among others, the protection of @private_data after @unit_mutex has been released.
Reported-by: Hyunwoo Kim imv4bel@gmail.com Signed-off-by: Eli Billauer eli.billauer@gmail.com Link: https://lore.kernel.org/r/20221117071825.3942-1-eli.billauer@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/char/xillybus/xillybus_class.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/char/xillybus/xillybus_class.c b/drivers/char/xillybus/xillybus_class.c index 0f238648dcfe..e9a288e61c15 100644 --- a/drivers/char/xillybus/xillybus_class.c +++ b/drivers/char/xillybus/xillybus_class.c @@ -227,14 +227,15 @@ int xillybus_find_inode(struct inode *inode, break; }
- mutex_unlock(&unit_mutex); - - if (!unit) + if (!unit) { + mutex_unlock(&unit_mutex); return -ENODEV; + }
*private_data = unit->private_data; *index = minor - unit->lowest_minor;
+ mutex_unlock(&unit_mutex); return 0; } EXPORT_SYMBOL(xillybus_find_inode);
From: Wei Yongjun weiyongjun1@huawei.com
[ Upstream commit 3f4033a811bcd1a1f077ce5297488a5c4dd30eb1 ]
ADMV8818_SW_IN_WR0_MSK and ADMV8818_SW_OUT_WR0_MSK have 3 bits, which means a length of 8, but freq_range_hpf and freq_range_lpf array size is 4, may end up reading 4 elements beyond the end of those arrays.
Check value first before access freq_range_hpf and freq_range_lpf to harden against the hardware allowing out of range values.
Signed-off-by: Wei Yongjun weiyongjun1@huawei.com Reviewed-by: Antoniu Miclaus antoniu.miclaus@analog.com Link: https://lore.kernel.org/r/20220922115848.1800021-1-weiyongjun@huaweicloud.co... Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iio/filter/admv8818.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/filter/admv8818.c b/drivers/iio/filter/admv8818.c index 68de45fe21b4..fe8d46cb7f1d 100644 --- a/drivers/iio/filter/admv8818.c +++ b/drivers/iio/filter/admv8818.c @@ -265,7 +265,7 @@ static int __admv8818_read_hpf_freq(struct admv8818_state *st, u64 *hpf_freq) return ret;
hpf_band = FIELD_GET(ADMV8818_SW_IN_WR0_MSK, data); - if (!hpf_band) { + if (!hpf_band || hpf_band > 4) { *hpf_freq = 0; return ret; } @@ -303,7 +303,7 @@ static int __admv8818_read_lpf_freq(struct admv8818_state *st, u64 *lpf_freq) return ret;
lpf_band = FIELD_GET(ADMV8818_SW_OUT_WR0_MSK, data); - if (!lpf_band) { + if (!lpf_band || lpf_band > 4) { *lpf_freq = 0; return ret; }
From: Mathias Nyman mathias.nyman@linux.intel.com
[ Upstream commit c3bbacd61baace2f4fbab17012c3d149df2d50f1 ]
Disable U3 suspended ports in hibernate S4 poweroff_late for systems with XHCI_RESET_TO_DEFAULT quirk, if wakeup is not enabled.
This reduces the number of self-powered usb devices from surviving in U3 suspended state into next reboot.
Bootloader/firmware on these systems can't handle usb ports in U3, and will timeout, causing extra delay during reboot/restore from S4.
Add pci_poweroff_late() callback to struct usb_hcd to get this done at the correct stage in hibernate.
Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com Link: https://lore.kernel.org/r/20221130091944.2171610-5-mathias.nyman@linux.intel... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/core/hcd-pci.c | 13 ++++++++++ drivers/usb/host/xhci-pci.c | 52 +++++++++++++++++++++++++++++++++++++ include/linux/usb/hcd.h | 3 +++ 3 files changed, 68 insertions(+)
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c index 482dae72ef1c..81a7f8d9d6e6 100644 --- a/drivers/usb/core/hcd-pci.c +++ b/drivers/usb/core/hcd-pci.c @@ -563,6 +563,17 @@ static int hcd_pci_suspend_noirq(struct device *dev) return retval; }
+static int hcd_pci_poweroff_late(struct device *dev) +{ + struct pci_dev *pci_dev = to_pci_dev(dev); + struct usb_hcd *hcd = pci_get_drvdata(pci_dev); + + if (hcd->driver->pci_poweroff_late && !HCD_DEAD(hcd)) + return hcd->driver->pci_poweroff_late(hcd, device_may_wakeup(dev)); + + return 0; +} + static int hcd_pci_resume_noirq(struct device *dev) { powermac_set_asic(to_pci_dev(dev), 1); @@ -583,6 +594,7 @@ static int hcd_pci_restore(struct device *dev)
#define hcd_pci_suspend NULL #define hcd_pci_suspend_noirq NULL +#define hcd_pci_poweroff_late NULL #define hcd_pci_resume_noirq NULL #define hcd_pci_resume NULL #define hcd_pci_restore NULL @@ -620,6 +632,7 @@ const struct dev_pm_ops usb_hcd_pci_pm_ops = { .thaw_noirq = NULL, .thaw = hcd_pci_resume, .poweroff = hcd_pci_suspend, + .poweroff_late = hcd_pci_poweroff_late, .poweroff_noirq = hcd_pci_suspend_noirq, .restore_noirq = hcd_pci_resume_noirq, .restore = hcd_pci_restore, diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index 0a8d37c5af03..5e3e94f16be8 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -620,6 +620,57 @@ static int xhci_pci_resume(struct usb_hcd *hcd, bool hibernated) return retval; }
+static int xhci_pci_poweroff_late(struct usb_hcd *hcd, bool do_wakeup) +{ + struct xhci_hcd *xhci = hcd_to_xhci(hcd); + struct xhci_port *port; + struct usb_device *udev; + unsigned int slot_id; + u32 portsc; + int i; + + /* + * Systems with XHCI_RESET_TO_DEFAULT quirk have boot firmware that + * cause significant boot delay if usb ports are in suspended U3 state + * during boot. Some USB devices survive in U3 state over S4 hibernate + * + * Disable ports that are in U3 if remote wake is not enabled for either + * host controller or connected device + */ + + if (!(xhci->quirks & XHCI_RESET_TO_DEFAULT)) + return 0; + + for (i = 0; i < HCS_MAX_PORTS(xhci->hcs_params1); i++) { + port = &xhci->hw_ports[i]; + portsc = readl(port->addr); + + if ((portsc & PORT_PLS_MASK) != XDEV_U3) + continue; + + slot_id = xhci_find_slot_id_by_port(port->rhub->hcd, xhci, + port->hcd_portnum + 1); + if (!slot_id || !xhci->devs[slot_id]) { + xhci_err(xhci, "No dev for slot_id %d for port %d-%d in U3\n", + slot_id, port->rhub->hcd->self.busnum, port->hcd_portnum + 1); + continue; + } + + udev = xhci->devs[slot_id]->udev; + + /* if wakeup is enabled then don't disable the port */ + if (udev->do_remote_wakeup && do_wakeup) + continue; + + xhci_dbg(xhci, "port %d-%d in U3 without wakeup, disable it\n", + port->rhub->hcd->self.busnum, port->hcd_portnum + 1); + portsc = xhci_port_state_to_neutral(portsc); + writel(portsc | PORT_PE, port->addr); + } + + return 0; +} + static void xhci_pci_shutdown(struct usb_hcd *hcd) { struct xhci_hcd *xhci = hcd_to_xhci(hcd); @@ -686,6 +737,7 @@ static int __init xhci_pci_init(void) #ifdef CONFIG_PM xhci_pci_hc_driver.pci_suspend = xhci_pci_suspend; xhci_pci_hc_driver.pci_resume = xhci_pci_resume; + xhci_pci_hc_driver.pci_poweroff_late = xhci_pci_poweroff_late; xhci_pci_hc_driver.shutdown = xhci_pci_shutdown; #endif return pci_register_driver(&xhci_pci_driver); diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h index 67f8713d3fa3..feb284016285 100644 --- a/include/linux/usb/hcd.h +++ b/include/linux/usb/hcd.h @@ -269,6 +269,9 @@ struct hc_driver { /* called after entering D0 (etc), before resuming the hub */ int (*pci_resume)(struct usb_hcd *hcd, bool hibernated);
+ /* called just before hibernate final D3 state, allows host to poweroff parts */ + int (*pci_poweroff_late)(struct usb_hcd *hcd, bool do_wakeup); + /* cleanly make HCD stop writing memory and doing I/O */ void (*stop) (struct usb_hcd *hcd);
From: Amadeusz Sławiński amadeuszx.slawinski@linux.intel.com
[ Upstream commit 7dfb216eda99bbfc2a8c3b03d2eec63314f52b3c ]
In our tests we get UBSAN warning coming from ACPI parser. This is caused by trying to resolve operands when there is none.
[ 0.000000] Linux version 5.15.0-rc3chromeavsrel1.0.184+ (root@...) (gcc (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #1 SMP PREEMPT Sat Oct 16 00:08:27 UTC 2021 ... [ 14.719508] ================================================================================ [ 14.719551] UBSAN: array-index-out-of-bounds in /.../linux/drivers/acpi/acpica/dswexec.c:401:12 [ 14.719594] index -1 is out of range for type 'acpi_operand_object *[9]' [ 14.719621] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.15.0-rc3chromeavsrel1.0.184+ #1 [ 14.719657] Hardware name: Intel Corp. Geminilake/GLK RVP2 LP4SD (07), BIOS GELKRVPA.X64.0214.B50.2009111159 09/11/2020 [ 14.719694] Call Trace: [ 14.719712] dump_stack_lvl+0x38/0x49 [ 14.719749] dump_stack+0x10/0x12 [ 14.719775] ubsan_epilogue+0x9/0x45 [ 14.719801] __ubsan_handle_out_of_bounds.cold+0x44/0x49 [ 14.719835] acpi_ds_exec_end_op+0x1d7/0x6b5 [ 14.719870] acpi_ps_parse_loop+0x942/0xb34 ...
Problem happens because WalkState->NumOperands is 0 and it is used when trying to access into operands table. Actual code is: WalkState->Operands [WalkState->NumOperands -1] which causes out of bound access. Improve the check before above access to check if ACPI opcode should have any arguments (operands) at all.
Link: https://github.com/acpica/acpica/pull/745 Signed-off-by: Amadeusz Sławiński amadeuszx.slawinski@linux.intel.com Reviewed-by: Cezary Rojewski cezary.rojewski@intel.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/acpi/acpica/dswexec.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/acpica/dswexec.c b/drivers/acpi/acpica/dswexec.c index e8ad41387f84..b082eb942a0f 100644 --- a/drivers/acpi/acpica/dswexec.c +++ b/drivers/acpi/acpica/dswexec.c @@ -389,9 +389,11 @@ acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
/* * All opcodes require operand resolution, with the only exceptions - * being the object_type and size_of operators. + * being the object_type and size_of operators as well as opcodes that + * take no arguments. */ - if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) { + if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE) && + (walk_state->op_info->flags & AML_HAS_ARGS)) {
/* Resolve all operands */
From: Marios Makassikis mmakassikis@freebox.fr
[ Upstream commit 01f6c61bae3d658058ee6322af77acea26a5ee3a ]
"flock" is leaked if an error happens before smb2_lock_init(), as the lock is not added to the lock_list to be cleaned up.
Signed-off-by: Marios Makassikis mmakassikis@freebox.fr Acked-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/ksmbd/smb2pdu.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 7a9497a7b0a3..4e6e55714f4b 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -6835,6 +6835,7 @@ int smb2_lock(struct ksmbd_work *work) if (lock_start > U64_MAX - lock_length) { pr_err("Invalid lock range requested\n"); rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; + locks_free_lock(flock); goto out; }
@@ -6854,6 +6855,7 @@ int smb2_lock(struct ksmbd_work *work) "the end offset(%llx) is smaller than the start offset(%llx)\n", flock->fl_end, flock->fl_start); rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; + locks_free_lock(flock); goto out; }
@@ -6865,6 +6867,7 @@ int smb2_lock(struct ksmbd_work *work) flock->fl_type != F_UNLCK) { pr_err("conflict two locks in one request\n"); err = -EINVAL; + locks_free_lock(flock); goto out; } } @@ -6873,6 +6876,7 @@ int smb2_lock(struct ksmbd_work *work) smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list); if (!smb_lock) { err = -EINVAL; + locks_free_lock(flock); goto out; } }
From: Jan Kara jack@suse.cz
[ Upstream commit a9438b44bc7015b18931e312bbd249a25bb59a65 ]
In the past we had several use-after-free issues with inodes getting added to writeback lists after evict() removed them. These are painful to debug so add some asserts to catch the problem earlier. The only non-obvious change in the commit is that we need to tweak redirty_tail_locked() to avoid triggering assertion in inode_io_list_move_locked().
Signed-off-by: Jan Kara jack@suse.cz Link: https://lore.kernel.org/r/20221212113633.29181-1-jack@suse.cz Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- fs/fs-writeback.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 9958d4020771..7ee235680006 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -121,6 +121,7 @@ static bool inode_io_list_move_locked(struct inode *inode, { assert_spin_locked(&wb->list_lock); assert_spin_locked(&inode->i_lock); + WARN_ON_ONCE(inode->i_state & I_FREEING);
list_move(&inode->i_io_list, head);
@@ -280,6 +281,7 @@ static void inode_cgwb_move_to_attached(struct inode *inode, { assert_spin_locked(&wb->list_lock); assert_spin_locked(&inode->i_lock); + WARN_ON_ONCE(inode->i_state & I_FREEING);
inode->i_state &= ~I_SYNC_QUEUED; if (wb != &wb->bdi->wb) @@ -1129,6 +1131,7 @@ static void inode_cgwb_move_to_attached(struct inode *inode, { assert_spin_locked(&wb->list_lock); assert_spin_locked(&inode->i_lock); + WARN_ON_ONCE(inode->i_state & I_FREEING);
inode->i_state &= ~I_SYNC_QUEUED; list_del_init(&inode->i_io_list); @@ -1294,6 +1297,17 @@ static void redirty_tail_locked(struct inode *inode, struct bdi_writeback *wb) { assert_spin_locked(&inode->i_lock);
+ inode->i_state &= ~I_SYNC_QUEUED; + /* + * When the inode is being freed just don't bother with dirty list + * tracking. Flush worker will ignore this inode anyway and it will + * trigger assertions in inode_io_list_move_locked(). + */ + if (inode->i_state & I_FREEING) { + list_del_init(&inode->i_io_list); + wb_io_lists_depopulated(wb); + return; + } if (!list_empty(&wb->b_dirty)) { struct inode *tail;
@@ -1302,7 +1316,6 @@ static void redirty_tail_locked(struct inode *inode, struct bdi_writeback *wb) inode->dirtied_when = jiffies; } inode_io_list_move_locked(inode, wb, &wb->b_dirty); - inode->i_state &= ~I_SYNC_QUEUED; }
static void redirty_tail(struct inode *inode, struct bdi_writeback *wb)
From: Yuezhang Mo Yuezhang.Mo@sony.com
[ Upstream commit 40306b4d1ba25970dafd53432e8daa5d591ebd99 ]
According to the exFAT specification, there are at most 2^32-11 clusters in a volume. so using 'int' is not enough for cluster index, the return value type of exfat_sector_to_cluster() should be 'unsigned int'.
Signed-off-by: Yuezhang Mo Yuezhang.Mo@sony.com Reviewed-by: Sungjong Seo sj1557.seo@samsung.com Signed-off-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/exfat/exfat_fs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/exfat/exfat_fs.h b/fs/exfat/exfat_fs.h index a8f8eee4937c..7f6b1d5bceab 100644 --- a/fs/exfat/exfat_fs.h +++ b/fs/exfat/exfat_fs.h @@ -375,7 +375,7 @@ static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi, sbi->data_start_sector; }
-static inline int exfat_sector_to_cluster(struct exfat_sb_info *sbi, +static inline unsigned int exfat_sector_to_cluster(struct exfat_sb_info *sbi, sector_t sec) { return ((sec - sbi->data_start_sector) >> sbi->sect_per_clus_bits) +
From: Dongliang Mu dzm91@hust.edu.cn
[ Upstream commit b76449ee75e21acfe9fa4c653d8598f191ed7d68 ]
The current error handling code in ufx_usb_probe have many unmatching issues, e.g., missing ufx_free_usb_list, destroy_modedb label should only include framebuffer_release, fb_dealloc_cmap only matches fb_alloc_cmap.
My local syzkaller reports a memory leak bug:
memory leak in ufx_usb_probe
BUG: memory leak unreferenced object 0xffff88802f879580 (size 128): comm "kworker/0:7", pid 17416, jiffies 4295067474 (age 46.710s) hex dump (first 32 bytes): 80 21 7c 2e 80 88 ff ff 18 d0 d0 0c 80 88 ff ff .!|............. 00 d0 d0 0c 80 88 ff ff e0 ff ff ff 0f 00 00 00 ................ backtrace: [<ffffffff814c99a0>] kmalloc_trace+0x20/0x90 mm/slab_common.c:1045 [<ffffffff824d219c>] kmalloc include/linux/slab.h:553 [inline] [<ffffffff824d219c>] kzalloc include/linux/slab.h:689 [inline] [<ffffffff824d219c>] ufx_alloc_urb_list drivers/video/fbdev/smscufx.c:1873 [inline] [<ffffffff824d219c>] ufx_usb_probe+0x11c/0x15a0 drivers/video/fbdev/smscufx.c:1655 [<ffffffff82d17927>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<ffffffff82712f0d>] call_driver_probe drivers/base/dd.c:560 [inline] [<ffffffff82712f0d>] really_probe+0x12d/0x390 drivers/base/dd.c:639 [<ffffffff8271322f>] __driver_probe_device+0xbf/0x140 drivers/base/dd.c:778 [<ffffffff827132da>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:808 [<ffffffff82713c27>] __device_attach_driver+0xf7/0x150 drivers/base/dd.c:936 [<ffffffff82710137>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427 [<ffffffff827136b5>] __device_attach+0x105/0x2d0 drivers/base/dd.c:1008 [<ffffffff82711d36>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:487 [<ffffffff8270e242>] device_add+0x642/0xdc0 drivers/base/core.c:3517 [<ffffffff82d14d5f>] usb_set_configuration+0x8ef/0xb80 drivers/usb/core/message.c:2170 [<ffffffff82d2576c>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238 [<ffffffff82d16ffc>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293 [<ffffffff82712f0d>] call_driver_probe drivers/base/dd.c:560 [inline] [<ffffffff82712f0d>] really_probe+0x12d/0x390 drivers/base/dd.c:639 [<ffffffff8271322f>] __driver_probe_device+0xbf/0x140 drivers/base/dd.c:778
Fix this bug by rewriting the error handling code in ufx_usb_probe.
Reported-by: syzkaller syzkaller@googlegroups.com Tested-by: Dongliang Mu dzm91@hust.edu.cn Signed-off-by: Dongliang Mu dzm91@hust.edu.cn Signed-off-by: Helge Deller deller@gmx.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/video/fbdev/smscufx.c | 46 +++++++++++++++++++++++------------ 1 file changed, 31 insertions(+), 15 deletions(-)
diff --git a/drivers/video/fbdev/smscufx.c b/drivers/video/fbdev/smscufx.c index 9343b7a4ac89..2ad6e98ce10d 100644 --- a/drivers/video/fbdev/smscufx.c +++ b/drivers/video/fbdev/smscufx.c @@ -1622,7 +1622,7 @@ static int ufx_usb_probe(struct usb_interface *interface, struct usb_device *usbdev; struct ufx_data *dev; struct fb_info *info; - int retval; + int retval = -ENOMEM; u32 id_rev, fpga_rev;
/* usb initialization */ @@ -1654,15 +1654,17 @@ static int ufx_usb_probe(struct usb_interface *interface,
if (!ufx_alloc_urb_list(dev, WRITES_IN_FLIGHT, MAX_TRANSFER)) { dev_err(dev->gdev, "ufx_alloc_urb_list failed\n"); - goto e_nomem; + goto put_ref; }
/* We don't register a new USB class. Our client interface is fbdev */
/* allocates framebuffer driver structure, not framebuffer memory */ info = framebuffer_alloc(0, &usbdev->dev); - if (!info) - goto e_nomem; + if (!info) { + dev_err(dev->gdev, "framebuffer_alloc failed\n"); + goto free_urb_list; + }
dev->info = info; info->par = dev; @@ -1705,22 +1707,34 @@ static int ufx_usb_probe(struct usb_interface *interface, check_warn_goto_error(retval, "unable to find common mode for display and adapter");
retval = ufx_reg_set_bits(dev, 0x4000, 0x00000001); - check_warn_goto_error(retval, "error %d enabling graphics engine", retval); + if (retval < 0) { + dev_err(dev->gdev, "error %d enabling graphics engine", retval); + goto setup_modes; + }
/* ready to begin using device */ atomic_set(&dev->usb_active, 1);
dev_dbg(dev->gdev, "checking var"); retval = ufx_ops_check_var(&info->var, info); - check_warn_goto_error(retval, "error %d ufx_ops_check_var", retval); + if (retval < 0) { + dev_err(dev->gdev, "error %d ufx_ops_check_var", retval); + goto reset_active; + }
dev_dbg(dev->gdev, "setting par"); retval = ufx_ops_set_par(info); - check_warn_goto_error(retval, "error %d ufx_ops_set_par", retval); + if (retval < 0) { + dev_err(dev->gdev, "error %d ufx_ops_set_par", retval); + goto reset_active; + }
dev_dbg(dev->gdev, "registering framebuffer"); retval = register_framebuffer(info); - check_warn_goto_error(retval, "error %d register_framebuffer", retval); + if (retval < 0) { + dev_err(dev->gdev, "error %d register_framebuffer", retval); + goto reset_active; + }
dev_info(dev->gdev, "SMSC UDX USB device /dev/fb%d attached. %dx%d resolution." " Using %dK framebuffer memory\n", info->node, @@ -1728,21 +1742,23 @@ static int ufx_usb_probe(struct usb_interface *interface,
return 0;
-error: - fb_dealloc_cmap(&info->cmap); -destroy_modedb: +reset_active: + atomic_set(&dev->usb_active, 0); +setup_modes: fb_destroy_modedb(info->monspecs.modedb); vfree(info->screen_base); fb_destroy_modelist(&info->modelist); +error: + fb_dealloc_cmap(&info->cmap); +destroy_modedb: framebuffer_release(info); +free_urb_list: + if (dev->urbs.count > 0) + ufx_free_urb_list(dev); put_ref: kref_put(&dev->kref, ufx_free); /* ref for framebuffer */ kref_put(&dev->kref, ufx_free); /* last ref from kref_init */ return retval; - -e_nomem: - retval = -ENOMEM; - goto put_ref; }
static void ufx_usb_disconnect(struct usb_interface *interface)
linux-stable-mirror@lists.linaro.org
-
Sasha Levin