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[Linux-stable-mirror] Patch "ALSA: seq: Cancel pending autoload work at unbinding device" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled ALSA: seq: Cancel pending autoload work at unbinding device to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: alsa-seq-cancel-pending-autoload-work-at-unbinding-device.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From fc27fe7e8deef2f37cba3f2be2d52b6ca5eb9d57 Mon Sep 17 00:00:00 2001 From: Takashi Iwai <tiwai(a)suse.de> Date: Tue, 12 Sep 2017 12:41:20 +0200 Subject: ALSA: seq: Cancel pending autoload work at unbinding device From: Takashi Iwai <tiwai(a)suse.de> commit fc27fe7e8deef2f37cba3f2be2d52b6ca5eb9d57 upstream. ALSA sequencer core has a mechanism to load the enumerated devices automatically, and it's performed in an off-load work. This seems causing some race when a sequencer is removed while the pending autoload work is running. As syzkaller spotted, it may lead to some use-after-free: BUG: KASAN: use-after-free in snd_rawmidi_dev_seq_free+0x69/0x70 sound/core/rawmidi.c:1617 Write of size 8 at addr ffff88006c611d90 by task kworker/2:1/567 CPU: 2 PID: 567 Comm: kworker/2:1 Not tainted 4.13.0+ #29 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Workqueue: events autoload_drivers Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x192/0x22c lib/dump_stack.c:52 print_address_description+0x78/0x280 mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report+0x230/0x340 mm/kasan/report.c:409 __asan_report_store8_noabort+0x1c/0x20 mm/kasan/report.c:435 snd_rawmidi_dev_seq_free+0x69/0x70 sound/core/rawmidi.c:1617 snd_seq_dev_release+0x4f/0x70 sound/core/seq_device.c:192 device_release+0x13f/0x210 drivers/base/core.c:814 kobject_cleanup lib/kobject.c:648 [inline] kobject_release lib/kobject.c:677 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put+0x145/0x240 lib/kobject.c:694 put_device+0x25/0x30 drivers/base/core.c:1799 klist_devices_put+0x36/0x40 drivers/base/bus.c:827 klist_next+0x264/0x4a0 lib/klist.c:403 next_device drivers/base/bus.c:270 [inline] bus_for_each_dev+0x17e/0x210 drivers/base/bus.c:312 autoload_drivers+0x3b/0x50 sound/core/seq_device.c:117 process_one_work+0x9fb/0x1570 kernel/workqueue.c:2097 worker_thread+0x1e4/0x1350 kernel/workqueue.c:2231 kthread+0x324/0x3f0 kernel/kthread.c:231 ret_from_fork+0x25/0x30 arch/x86/entry/entry_64.S:425 The fix is simply to assure canceling the autoload work at removing the device. Reported-by: Andrey Konovalov <andreyknvl(a)google.com> Tested-by: Andrey Konovalov <andreyknvl(a)google.com> Signed-off-by: Takashi Iwai <tiwai(a)suse.de> Cc: Ben Hutchings <ben.hutchings(a)codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- sound/core/seq/seq_device.c | 3 +++ 1 file changed, 3 insertions(+) --- a/sound/core/seq/seq_device.c +++ b/sound/core/seq/seq_device.c @@ -148,8 +148,10 @@ void snd_seq_device_load_drivers(void) flush_work(&autoload_work); } EXPORT_SYMBOL(snd_seq_device_load_drivers); +#define cancel_autoload_drivers() cancel_work_sync(&autoload_work) #else #define queue_autoload_drivers() /* NOP */ +#define cancel_autoload_drivers() /* NOP */ #endif /* @@ -159,6 +161,7 @@ static int snd_seq_device_dev_free(struc { struct snd_seq_device *dev = device->device_data; + cancel_autoload_drivers(); put_device(&dev->dev); return 0; } Patches currently in stable-queue which might be from tiwai(a)suse.de are queue-4.9/alsa-seq-cancel-pending-autoload-work-at-unbinding-device.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "usb: usbtest: fix NULL pointer dereference" has been added to the 4.4-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled usb: usbtest: fix NULL pointer dereference to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: usb-usbtest-fix-null-pointer-dereference.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From 7c80f9e4a588f1925b07134bb2e3689335f6c6d8 Mon Sep 17 00:00:00 2001 From: Alan Stern <stern(a)rowland.harvard.edu> Date: Fri, 29 Sep 2017 10:54:24 -0400 Subject: usb: usbtest: fix NULL pointer dereference From: Alan Stern <stern(a)rowland.harvard.edu> commit 7c80f9e4a588f1925b07134bb2e3689335f6c6d8 upstream. If the usbtest driver encounters a device with an IN bulk endpoint but no OUT bulk endpoint, it will try to dereference a NULL pointer (out->desc.bEndpointAddress). The problem can be solved by adding a missing test. Signed-off-by: Alan Stern <stern(a)rowland.harvard.edu> Reported-by: Andrey Konovalov <andreyknvl(a)google.com> Tested-by: Andrey Konovalov <andreyknvl(a)google.com> Signed-off-by: Felipe Balbi <felipe.balbi(a)linux.intel.com> Cc: Ben Hutchings <ben.hutchings(a)codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/usb/misc/usbtest.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/drivers/usb/misc/usbtest.c +++ b/drivers/usb/misc/usbtest.c @@ -185,12 +185,13 @@ found: return tmp; } - if (in) { + if (in) dev->in_pipe = usb_rcvbulkpipe(udev, in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); + if (out) dev->out_pipe = usb_sndbulkpipe(udev, out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); - } + if (iso_in) { dev->iso_in = &iso_in->desc; dev->in_iso_pipe = usb_rcvisocpipe(udev, Patches currently in stable-queue which might be from stern(a)rowland.harvard.edu are queue-4.4/usb-usbtest-fix-null-pointer-dereference.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "mac80211: use constant time comparison with keys" has been added to the 4.4-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled mac80211: use constant time comparison with keys to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: mac80211-use-constant-time-comparison-with-keys.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From 2bdd713b92a9cade239d3c7d15205a09f556624d Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" <Jason(a)zx2c4.com> Date: Tue, 17 Oct 2017 20:32:07 +0200 Subject: mac80211: use constant time comparison with keys From: Jason A. Donenfeld <Jason(a)zx2c4.com> commit 2bdd713b92a9cade239d3c7d15205a09f556624d upstream. Otherwise we risk leaking information via timing side channel. Fixes: fdf7cb4185b6 ("mac80211: accept key reinstall without changing anything") Signed-off-by: Jason A. Donenfeld <Jason(a)zx2c4.com> Signed-off-by: Johannes Berg <johannes.berg(a)intel.com> Cc: Ben Hutchings <ben.hutchings(a)codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- net/mac80211/key.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/net/mac80211/key.c +++ b/net/mac80211/key.c @@ -19,6 +19,7 @@ #include <linux/slab.h> #include <linux/export.h> #include <net/mac80211.h> +#include <crypto/algapi.h> #include <asm/unaligned.h> #include "ieee80211_i.h" #include "driver-ops.h" @@ -633,7 +634,7 @@ int ieee80211_key_link(struct ieee80211_ * new version of the key to avoid nonce reuse or replay issues. */ if (old_key && key->conf.keylen == old_key->conf.keylen && - !memcmp(key->conf.key, old_key->conf.key, key->conf.keylen)) { + !crypto_memneq(key->conf.key, old_key->conf.key, key->conf.keylen)) { ieee80211_key_free_unused(key); ret = 0; goto out; Patches currently in stable-queue which might be from Jason(a)zx2c4.com are queue-4.4/mac80211-use-constant-time-comparison-with-keys.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "mac80211: don't compare TKIP TX MIC key in reinstall prevention" has been added to the 4.4-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled mac80211: don't compare TKIP TX MIC key in reinstall prevention to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: mac80211-don-t-compare-tkip-tx-mic-key-in-reinstall-prevention.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From cfbb0d90a7abb289edc91833d0905931f8805f12 Mon Sep 17 00:00:00 2001 From: Johannes Berg <johannes.berg(a)intel.com> Date: Tue, 24 Oct 2017 21:12:13 +0200 Subject: mac80211: don't compare TKIP TX MIC key in reinstall prevention From: Johannes Berg <johannes.berg(a)intel.com> commit cfbb0d90a7abb289edc91833d0905931f8805f12 upstream. For the reinstall prevention, the code I had added compares the whole key. It turns out though that iwlwifi firmware doesn't provide the TKIP TX MIC key as it's not needed in client mode, and thus the comparison will always return false. For client mode, thus always zero out the TX MIC key part before doing the comparison in order to avoid accepting the reinstall of the key with identical encryption and RX MIC key, but not the same TX MIC key (since the supplicant provides the real one.) Fixes: fdf7cb4185b6 ("mac80211: accept key reinstall without changing anything") Signed-off-by: Johannes Berg <johannes.berg(a)intel.com> Cc: Ben Hutchings <ben.hutchings(a)codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- net/mac80211/key.c | 36 ++++++++++++++++++++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-) --- a/net/mac80211/key.c +++ b/net/mac80211/key.c @@ -608,6 +608,39 @@ void ieee80211_key_free_unused(struct ie ieee80211_key_free_common(key); } +static bool ieee80211_key_identical(struct ieee80211_sub_if_data *sdata, + struct ieee80211_key *old, + struct ieee80211_key *new) +{ + u8 tkip_old[WLAN_KEY_LEN_TKIP], tkip_new[WLAN_KEY_LEN_TKIP]; + u8 *tk_old, *tk_new; + + if (!old || new->conf.keylen != old->conf.keylen) + return false; + + tk_old = old->conf.key; + tk_new = new->conf.key; + + /* + * In station mode, don't compare the TX MIC key, as it's never used + * and offloaded rekeying may not care to send it to the host. This + * is the case in iwlwifi, for example. + */ + if (sdata->vif.type == NL80211_IFTYPE_STATION && + new->conf.cipher == WLAN_CIPHER_SUITE_TKIP && + new->conf.keylen == WLAN_KEY_LEN_TKIP && + !(new->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE)) { + memcpy(tkip_old, tk_old, WLAN_KEY_LEN_TKIP); + memcpy(tkip_new, tk_new, WLAN_KEY_LEN_TKIP); + memset(tkip_old + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY, 0, 8); + memset(tkip_new + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY, 0, 8); + tk_old = tkip_old; + tk_new = tkip_new; + } + + return !crypto_memneq(tk_old, tk_new, new->conf.keylen); +} + int ieee80211_key_link(struct ieee80211_key *key, struct ieee80211_sub_if_data *sdata, struct sta_info *sta) @@ -633,8 +666,7 @@ int ieee80211_key_link(struct ieee80211_ * Silently accept key re-installation without really installing the * new version of the key to avoid nonce reuse or replay issues. */ - if (old_key && key->conf.keylen == old_key->conf.keylen && - !crypto_memneq(key->conf.key, old_key->conf.key, key->conf.keylen)) { + if (ieee80211_key_identical(sdata, old_key, key)) { ieee80211_key_free_unused(key); ret = 0; goto out; Patches currently in stable-queue which might be from johannes.berg(a)intel.com are queue-4.4/mac80211-use-constant-time-comparison-with-keys.patch queue-4.4/mac80211-don-t-compare-tkip-tx-mic-key-in-reinstall-prevention.patch queue-4.4/mac80211-accept-key-reinstall-without-changing-anything.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "mac80211: accept key reinstall without changing anything" has been added to the 4.4-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled mac80211: accept key reinstall without changing anything to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: mac80211-accept-key-reinstall-without-changing-anything.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From fdf7cb4185b60c68e1a75e61691c4afdc15dea0e Mon Sep 17 00:00:00 2001 From: Johannes Berg <johannes.berg(a)intel.com> Date: Tue, 5 Sep 2017 14:54:54 +0200 Subject: mac80211: accept key reinstall without changing anything From: Johannes Berg <johannes.berg(a)intel.com> commit fdf7cb4185b60c68e1a75e61691c4afdc15dea0e upstream. When a key is reinstalled we can reset the replay counters etc. which can lead to nonce reuse and/or replay detection being impossible, breaking security properties, as described in the "KRACK attacks". In particular, CVE-2017-13080 applies to GTK rekeying that happened in firmware while the host is in D3, with the second part of the attack being done after the host wakes up. In this case, the wpa_supplicant mitigation isn't sufficient since wpa_supplicant doesn't know the GTK material. In case this happens, simply silently accept the new key coming from userspace but don't take any action on it since it's the same key; this keeps the PN replay counters intact. Signed-off-by: Johannes Berg <johannes.berg(a)intel.com> Cc: Ben Hutchings <ben.hutchings(a)codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- net/mac80211/key.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) --- a/net/mac80211/key.c +++ b/net/mac80211/key.c @@ -4,6 +4,7 @@ * Copyright 2006-2007 Jiri Benc <jbenc(a)suse.cz> * Copyright 2007-2008 Johannes Berg <johannes(a)sipsolutions.net> * Copyright 2013-2014 Intel Mobile Communications GmbH + * Copyright 2017 Intel Deutschland GmbH * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -617,9 +618,6 @@ int ieee80211_key_link(struct ieee80211_ pairwise = key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE; idx = key->conf.keyidx; - key->local = sdata->local; - key->sdata = sdata; - key->sta = sta; mutex_lock(&sdata->local->key_mtx); @@ -630,6 +628,21 @@ int ieee80211_key_link(struct ieee80211_ else old_key = key_mtx_dereference(sdata->local, sdata->keys[idx]); + /* + * Silently accept key re-installation without really installing the + * new version of the key to avoid nonce reuse or replay issues. + */ + if (old_key && key->conf.keylen == old_key->conf.keylen && + !memcmp(key->conf.key, old_key->conf.key, key->conf.keylen)) { + ieee80211_key_free_unused(key); + ret = 0; + goto out; + } + + key->local = sdata->local; + key->sdata = sdata; + key->sta = sta; + increment_tailroom_need_count(sdata); ieee80211_key_replace(sdata, sta, pairwise, old_key, key); @@ -645,6 +658,7 @@ int ieee80211_key_link(struct ieee80211_ ret = 0; } + out: mutex_unlock(&sdata->local->key_mtx); return ret; Patches currently in stable-queue which might be from johannes.berg(a)intel.com are queue-4.4/mac80211-use-constant-time-comparison-with-keys.patch queue-4.4/mac80211-don-t-compare-tkip-tx-mic-key-in-reinstall-prevention.patch queue-4.4/mac80211-accept-key-reinstall-without-changing-anything.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "Input: ims-psu - check if CDC union descriptor is sane" has been added to the 4.4-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled Input: ims-psu - check if CDC union descriptor is sane to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: input-ims-psu-check-if-cdc-union-descriptor-is-sane.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From ea04efee7635c9120d015dcdeeeb6988130cb67a Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov <dmitry.torokhov(a)gmail.com> Date: Sat, 7 Oct 2017 11:07:47 -0700 Subject: Input: ims-psu - check if CDC union descriptor is sane From: Dmitry Torokhov <dmitry.torokhov(a)gmail.com> commit ea04efee7635c9120d015dcdeeeb6988130cb67a upstream. Before trying to use CDC union descriptor, try to validate whether that it is sane by checking that intf->altsetting->extra is big enough and that descriptor bLength is not too big and not too small. Reported-by: Andrey Konovalov <andreyknvl(a)google.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov(a)gmail.com> Cc: Ben Hutchings <ben.hutchings(a)codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/input/misc/ims-pcu.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) --- a/drivers/input/misc/ims-pcu.c +++ b/drivers/input/misc/ims-pcu.c @@ -1635,13 +1635,25 @@ ims_pcu_get_cdc_union_desc(struct usb_in return NULL; } - while (buflen > 0) { + while (buflen >= sizeof(*union_desc)) { union_desc = (struct usb_cdc_union_desc *)buf; + if (union_desc->bLength > buflen) { + dev_err(&intf->dev, "Too large descriptor\n"); + return NULL; + } + if (union_desc->bDescriptorType == USB_DT_CS_INTERFACE && union_desc->bDescriptorSubType == USB_CDC_UNION_TYPE) { dev_dbg(&intf->dev, "Found union header\n"); - return union_desc; + + if (union_desc->bLength >= sizeof(*union_desc)) + return union_desc; + + dev_err(&intf->dev, + "Union descriptor to short (%d vs %zd\n)", + union_desc->bLength, sizeof(*union_desc)); + return NULL; } buflen -= union_desc->bLength; Patches currently in stable-queue which might be from dmitry.torokhov(a)gmail.com are queue-4.4/input-ims-psu-check-if-cdc-union-descriptor-is-sane.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "ALSA: seq: Cancel pending autoload work at unbinding device" has been added to the 4.4-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled ALSA: seq: Cancel pending autoload work at unbinding device to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: alsa-seq-cancel-pending-autoload-work-at-unbinding-device.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From fc27fe7e8deef2f37cba3f2be2d52b6ca5eb9d57 Mon Sep 17 00:00:00 2001 From: Takashi Iwai <tiwai(a)suse.de> Date: Tue, 12 Sep 2017 12:41:20 +0200 Subject: ALSA: seq: Cancel pending autoload work at unbinding device From: Takashi Iwai <tiwai(a)suse.de> commit fc27fe7e8deef2f37cba3f2be2d52b6ca5eb9d57 upstream. ALSA sequencer core has a mechanism to load the enumerated devices automatically, and it's performed in an off-load work. This seems causing some race when a sequencer is removed while the pending autoload work is running. As syzkaller spotted, it may lead to some use-after-free: BUG: KASAN: use-after-free in snd_rawmidi_dev_seq_free+0x69/0x70 sound/core/rawmidi.c:1617 Write of size 8 at addr ffff88006c611d90 by task kworker/2:1/567 CPU: 2 PID: 567 Comm: kworker/2:1 Not tainted 4.13.0+ #29 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Workqueue: events autoload_drivers Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x192/0x22c lib/dump_stack.c:52 print_address_description+0x78/0x280 mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report+0x230/0x340 mm/kasan/report.c:409 __asan_report_store8_noabort+0x1c/0x20 mm/kasan/report.c:435 snd_rawmidi_dev_seq_free+0x69/0x70 sound/core/rawmidi.c:1617 snd_seq_dev_release+0x4f/0x70 sound/core/seq_device.c:192 device_release+0x13f/0x210 drivers/base/core.c:814 kobject_cleanup lib/kobject.c:648 [inline] kobject_release lib/kobject.c:677 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put+0x145/0x240 lib/kobject.c:694 put_device+0x25/0x30 drivers/base/core.c:1799 klist_devices_put+0x36/0x40 drivers/base/bus.c:827 klist_next+0x264/0x4a0 lib/klist.c:403 next_device drivers/base/bus.c:270 [inline] bus_for_each_dev+0x17e/0x210 drivers/base/bus.c:312 autoload_drivers+0x3b/0x50 sound/core/seq_device.c:117 process_one_work+0x9fb/0x1570 kernel/workqueue.c:2097 worker_thread+0x1e4/0x1350 kernel/workqueue.c:2231 kthread+0x324/0x3f0 kernel/kthread.c:231 ret_from_fork+0x25/0x30 arch/x86/entry/entry_64.S:425 The fix is simply to assure canceling the autoload work at removing the device. Reported-by: Andrey Konovalov <andreyknvl(a)google.com> Tested-by: Andrey Konovalov <andreyknvl(a)google.com> Signed-off-by: Takashi Iwai <tiwai(a)suse.de> Cc: Ben Hutchings <ben.hutchings(a)codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- sound/core/seq/seq_device.c | 3 +++ 1 file changed, 3 insertions(+) --- a/sound/core/seq/seq_device.c +++ b/sound/core/seq/seq_device.c @@ -148,8 +148,10 @@ void snd_seq_device_load_drivers(void) flush_work(&autoload_work); } EXPORT_SYMBOL(snd_seq_device_load_drivers); +#define cancel_autoload_drivers() cancel_work_sync(&autoload_work) #else #define queue_autoload_drivers() /* NOP */ +#define cancel_autoload_drivers() /* NOP */ #endif /* @@ -159,6 +161,7 @@ static int snd_seq_device_dev_free(struc { struct snd_seq_device *dev = device->device_data; + cancel_autoload_drivers(); put_device(&dev->dev); return 0; } Patches currently in stable-queue which might be from tiwai(a)suse.de are queue-4.4/alsa-seq-cancel-pending-autoload-work-at-unbinding-device.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "usb: usbtest: fix NULL pointer dereference" has been added to the 4.13-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled usb: usbtest: fix NULL pointer dereference to the 4.13-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: usb-usbtest-fix-null-pointer-dereference.patch and it can be found in the queue-4.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From 7c80f9e4a588f1925b07134bb2e3689335f6c6d8 Mon Sep 17 00:00:00 2001 From: Alan Stern <stern(a)rowland.harvard.edu> Date: Fri, 29 Sep 2017 10:54:24 -0400 Subject: usb: usbtest: fix NULL pointer dereference From: Alan Stern <stern(a)rowland.harvard.edu> commit 7c80f9e4a588f1925b07134bb2e3689335f6c6d8 upstream. If the usbtest driver encounters a device with an IN bulk endpoint but no OUT bulk endpoint, it will try to dereference a NULL pointer (out->desc.bEndpointAddress). The problem can be solved by adding a missing test. Signed-off-by: Alan Stern <stern(a)rowland.harvard.edu> Reported-by: Andrey Konovalov <andreyknvl(a)google.com> Tested-by: Andrey Konovalov <andreyknvl(a)google.com> Signed-off-by: Felipe Balbi <felipe.balbi(a)linux.intel.com> Cc: Ben Hutchings <ben.hutchings(a)codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/usb/misc/usbtest.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/drivers/usb/misc/usbtest.c +++ b/drivers/usb/misc/usbtest.c @@ -202,12 +202,13 @@ found: return tmp; } - if (in) { + if (in) dev->in_pipe = usb_rcvbulkpipe(udev, in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); + if (out) dev->out_pipe = usb_sndbulkpipe(udev, out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); - } + if (iso_in) { dev->iso_in = &iso_in->desc; dev->in_iso_pipe = usb_rcvisocpipe(udev, Patches currently in stable-queue which might be from stern(a)rowland.harvard.edu are queue-4.13/usb-usbtest-fix-null-pointer-dereference.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "mac80211: use constant time comparison with keys" has been added to the 4.13-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled mac80211: use constant time comparison with keys to the 4.13-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: mac80211-use-constant-time-comparison-with-keys.patch and it can be found in the queue-4.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From 2bdd713b92a9cade239d3c7d15205a09f556624d Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" <Jason(a)zx2c4.com> Date: Tue, 17 Oct 2017 20:32:07 +0200 Subject: mac80211: use constant time comparison with keys From: Jason A. Donenfeld <Jason(a)zx2c4.com> commit 2bdd713b92a9cade239d3c7d15205a09f556624d upstream. Otherwise we risk leaking information via timing side channel. Fixes: fdf7cb4185b6 ("mac80211: accept key reinstall without changing anything") Signed-off-by: Jason A. Donenfeld <Jason(a)zx2c4.com> Signed-off-by: Johannes Berg <johannes.berg(a)intel.com> Cc: Ben Hutchings <ben.hutchings(a)codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- net/mac80211/key.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/net/mac80211/key.c +++ b/net/mac80211/key.c @@ -19,6 +19,7 @@ #include <linux/slab.h> #include <linux/export.h> #include <net/mac80211.h> +#include <crypto/algapi.h> #include <asm/unaligned.h> #include "ieee80211_i.h" #include "driver-ops.h" @@ -635,7 +636,7 @@ int ieee80211_key_link(struct ieee80211_ * new version of the key to avoid nonce reuse or replay issues. */ if (old_key && key->conf.keylen == old_key->conf.keylen && - !memcmp(key->conf.key, old_key->conf.key, key->conf.keylen)) { + !crypto_memneq(key->conf.key, old_key->conf.key, key->conf.keylen)) { ieee80211_key_free_unused(key); ret = 0; goto out; Patches currently in stable-queue which might be from Jason(a)zx2c4.com are queue-4.13/mac80211-use-constant-time-comparison-with-keys.patch queue-4.13/netlink-do-not-set-cb_running-if-dump-s-start-errs.patch

7 years, 2 months

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[Linux-stable-mirror] Patch "mac80211: don't compare TKIP TX MIC key in reinstall prevention" has been added to the 4.13-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled mac80211: don't compare TKIP TX MIC key in reinstall prevention to the 4.13-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: mac80211-don-t-compare-tkip-tx-mic-key-in-reinstall-prevention.patch and it can be found in the queue-4.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From cfbb0d90a7abb289edc91833d0905931f8805f12 Mon Sep 17 00:00:00 2001 From: Johannes Berg <johannes.berg(a)intel.com> Date: Tue, 24 Oct 2017 21:12:13 +0200 Subject: mac80211: don't compare TKIP TX MIC key in reinstall prevention From: Johannes Berg <johannes.berg(a)intel.com> commit cfbb0d90a7abb289edc91833d0905931f8805f12 upstream. For the reinstall prevention, the code I had added compares the whole key. It turns out though that iwlwifi firmware doesn't provide the TKIP TX MIC key as it's not needed in client mode, and thus the comparison will always return false. For client mode, thus always zero out the TX MIC key part before doing the comparison in order to avoid accepting the reinstall of the key with identical encryption and RX MIC key, but not the same TX MIC key (since the supplicant provides the real one.) Fixes: fdf7cb4185b6 ("mac80211: accept key reinstall without changing anything") Signed-off-by: Johannes Berg <johannes.berg(a)intel.com> Cc: Ben Hutchings <ben.hutchings(a)codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- net/mac80211/key.c | 36 ++++++++++++++++++++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-) --- a/net/mac80211/key.c +++ b/net/mac80211/key.c @@ -610,6 +610,39 @@ void ieee80211_key_free_unused(struct ie ieee80211_key_free_common(key); } +static bool ieee80211_key_identical(struct ieee80211_sub_if_data *sdata, + struct ieee80211_key *old, + struct ieee80211_key *new) +{ + u8 tkip_old[WLAN_KEY_LEN_TKIP], tkip_new[WLAN_KEY_LEN_TKIP]; + u8 *tk_old, *tk_new; + + if (!old || new->conf.keylen != old->conf.keylen) + return false; + + tk_old = old->conf.key; + tk_new = new->conf.key; + + /* + * In station mode, don't compare the TX MIC key, as it's never used + * and offloaded rekeying may not care to send it to the host. This + * is the case in iwlwifi, for example. + */ + if (sdata->vif.type == NL80211_IFTYPE_STATION && + new->conf.cipher == WLAN_CIPHER_SUITE_TKIP && + new->conf.keylen == WLAN_KEY_LEN_TKIP && + !(new->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE)) { + memcpy(tkip_old, tk_old, WLAN_KEY_LEN_TKIP); + memcpy(tkip_new, tk_new, WLAN_KEY_LEN_TKIP); + memset(tkip_old + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY, 0, 8); + memset(tkip_new + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY, 0, 8); + tk_old = tkip_old; + tk_new = tkip_new; + } + + return !crypto_memneq(tk_old, tk_new, new->conf.keylen); +} + int ieee80211_key_link(struct ieee80211_key *key, struct ieee80211_sub_if_data *sdata, struct sta_info *sta) @@ -635,8 +668,7 @@ int ieee80211_key_link(struct ieee80211_ * Silently accept key re-installation without really installing the * new version of the key to avoid nonce reuse or replay issues. */ - if (old_key && key->conf.keylen == old_key->conf.keylen && - !crypto_memneq(key->conf.key, old_key->conf.key, key->conf.keylen)) { + if (ieee80211_key_identical(sdata, old_key, key)) { ieee80211_key_free_unused(key); ret = 0; goto out; Patches currently in stable-queue which might be from johannes.berg(a)intel.com are queue-4.13/netlink-fix-netlink_ack-extack-race.patch queue-4.13/mac80211-use-constant-time-comparison-with-keys.patch queue-4.13/mac80211-don-t-compare-tkip-tx-mic-key-in-reinstall-prevention.patch queue-4.13/mac80211-accept-key-reinstall-without-changing-anything.patch

7 years, 2 months

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