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[PATCH] selftests/mm: fix division-by-zero in uffd-unit-tests

by Carlos Llamas

Commit 4dfd4bba8578 ("selftests/mm/uffd: refactor non-composite global vars into struct") moved some of the operations previously implemented in uffd_setup_environment() earlier in the main test loop. The calculation of nr_pages, which involves a division by page_size, now occurs before checking that default_huge_page_size() returns a non-zero This leads to a division-by-zero error on systems with !CONFIG_HUGETLB. Fix this by relocating the non-zero page_size check before the nr_pages calculation, as it was originally implemented. Cc: stable(a)vger.kernel.org Fixes: 4dfd4bba8578 ("selftests/mm/uffd: refactor non-composite global vars into struct") Signed-off-by: Carlos Llamas <cmllamas(a)google.com> --- tools/testing/selftests/mm/uffd-unit-tests.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/tools/testing/selftests/mm/uffd-unit-tests.c b/tools/testing/selftests/mm/uffd-unit-tests.c index 9e3be2ee7f1b..f917b4c4c943 100644 --- a/tools/testing/selftests/mm/uffd-unit-tests.c +++ b/tools/testing/selftests/mm/uffd-unit-tests.c @@ -1758,10 +1758,15 @@ int main(int argc, char *argv[]) uffd_test_ops = mem_type->mem_ops; uffd_test_case_ops = test->test_case_ops; - if (mem_type->mem_flag & (MEM_HUGETLB_PRIVATE | MEM_HUGETLB)) + if (mem_type->mem_flag & (MEM_HUGETLB_PRIVATE | MEM_HUGETLB)) { gopts.page_size = default_huge_page_size(); - else + if (gopts.page_size == 0) { + uffd_test_skip("huge page size is 0, feature missing?"); + continue; + } + } else { gopts.page_size = psize(); + } /* Ensure we have at least 2 pages */ gopts.nr_pages = MAX(UFFD_TEST_MEM_SIZE, gopts.page_size * 2) @@ -1776,12 +1781,6 @@ int main(int argc, char *argv[]) continue; uffd_test_start("%s on %s", test->name, mem_type->name); - if ((mem_type->mem_flag == MEM_HUGETLB || - mem_type->mem_flag == MEM_HUGETLB_PRIVATE) && - (default_huge_page_size() == 0)) { - uffd_test_skip("huge page size is 0, feature missing?"); - continue; - } if (!uffd_feature_supported(test)) { uffd_test_skip("feature missing"); continue; -- 2.51.2.1041.gc1ab5b90ca-goog

1 month, 1 week

6
9
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[PATCH 0/2] Two NVMe/FC bug fixes for -stable

by Ewan D. Milne

This patch series contains two fixes to the NVMe/FC transport code. The first one fixes a problem where we prematurely free the tagset based on an observation and a fix originally proposed by Ming Lei, with a further modification based on more extensive testing. The second one fixes a problem where we sometimes still had a workqueue item queued when we freed the nvme_fc_ctrl. Because both patches touch the same nvme_fc_delete_ctrl() function, they have to be applied in the correct order to merge cleanly. However they fix separate issues. Ewan D. Milne (2): nvme-fc: move tagset removal to nvme_fc_delete_ctrl() nvme: nvme-fc: Ensure ->ioerr_work is cancelled in nvme_fc_delete_ctrl() drivers/nvme/host/fc.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) -- 2.43.0

1 month, 1 week

3
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Vendor Registration - Qatar Airways

by Qatar Airways

Dear Sir/Madam, We hope this message finds you well. Qatar Airways is pleased to announce the launch of its 2026/27 Expansion Program. We are currently seeking to engage with qualified Suppliers, Vendors, Manufacturers, and Contractors across a wide range of sectors. If your organization is interested in participating in this exciting initiative, we invite you to request our Vendor Application Form and submit your Expression of Interest (EOI) for evaluation. We look forward to the opportunity to collaborate and achieve mutual growth through this strategic partnership. Best regards, Hamza Mohammed Sahib Procurement & Logistics Manager Phone/ WhatsApp: +971-56-778-2809 Qatar Airways

1 month, 1 week

1
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[PATCH 05/15] dmaengine: idxd: fix device leaks on compat bind and unbind

by Johan Hovold

Make sure to drop the reference taken when looking up the idxd device as part of the compat bind and unbind sysfs interface. Fixes: 6e7f3ee97bbe ("dmaengine: idxd: move dsa_drv support to compatible mode") Cc: stable(a)vger.kernel.org # 5.15 Cc: Dave Jiang <dave.jiang(a)intel.com> Signed-off-by: Johan Hovold <johan(a)kernel.org> --- drivers/dma/idxd/compat.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) diff --git a/drivers/dma/idxd/compat.c b/drivers/dma/idxd/compat.c index eff9943f1a42..95b8ef958633 100644 --- a/drivers/dma/idxd/compat.c +++ b/drivers/dma/idxd/compat.c @@ -20,11 +20,16 @@ static ssize_t unbind_store(struct device_driver *drv, const char *buf, size_t c int rc = -ENODEV; dev = bus_find_device_by_name(bus, NULL, buf); - if (dev && dev->driver) { + if (!dev) + return -ENODEV; + + if (dev->driver) { device_driver_detach(dev); rc = count; } + put_device(dev); + return rc; } static DRIVER_ATTR_IGNORE_LOCKDEP(unbind, 0200, NULL, unbind_store); @@ -38,9 +43,12 @@ static ssize_t bind_store(struct device_driver *drv, const char *buf, size_t cou struct idxd_dev *idxd_dev; dev = bus_find_device_by_name(bus, NULL, buf); - if (!dev || dev->driver || drv != &dsa_drv.drv) + if (!dev) return -ENODEV; + if (dev->driver || drv != &dsa_drv.drv) + goto err_put_dev; + idxd_dev = confdev_to_idxd_dev(dev); if (is_idxd_dev(idxd_dev)) { alt_drv = driver_find("idxd", bus); @@ -53,13 +61,20 @@ static ssize_t bind_store(struct device_driver *drv, const char *buf, size_t cou alt_drv = driver_find("user", bus); } if (!alt_drv) - return -ENODEV; + goto err_put_dev; rc = device_driver_attach(alt_drv, dev); if (rc < 0) - return rc; + goto err_put_dev; + + put_device(dev); return count; + +err_put_dev: + put_device(dev); + + return rc; } static DRIVER_ATTR_IGNORE_LOCKDEP(bind, 0200, NULL, bind_store); -- 2.51.0

1 month, 1 week

2
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[PATCH 15/15] dmaengine: ti: k3-udma: fix device leak on udma lookup

by Johan Hovold

Make sure to drop the reference taken when looking up the UDMA platform device. Note that holding a reference to a platform device does not prevent its driver data from going away so there is no point in keeping the reference after the lookup helper returns. Fixes: d70241913413 ("dmaengine: ti: k3-udma: Add glue layer for non DMAengine users") Fixes: 1438cde8fe9c ("dmaengine: ti: k3-udma: add missing put_device() call in of_xudma_dev_get()") Cc: stable(a)vger.kernel.org # 5.6: 1438cde8fe9c Cc: Grygorii Strashko <grygorii.strashko(a)ti.com> Cc: Yu Kuai <yukuai3(a)huawei.com> Signed-off-by: Johan Hovold <johan(a)kernel.org> --- drivers/dma/ti/k3-udma-private.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/ti/k3-udma-private.c b/drivers/dma/ti/k3-udma-private.c index 05228bf00033..624360423ef1 100644 --- a/drivers/dma/ti/k3-udma-private.c +++ b/drivers/dma/ti/k3-udma-private.c @@ -42,9 +42,9 @@ struct udma_dev *of_xudma_dev_get(struct device_node *np, const char *property) } ud = platform_get_drvdata(pdev); + put_device(&pdev->dev); if (!ud) { pr_debug("UDMA has not been probed\n"); - put_device(&pdev->dev); return ERR_PTR(-EPROBE_DEFER); } -- 2.51.0

1 month, 1 week

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[PATCH 13/15] dmaengine: ti: dma-crossbar: fix device leak on am335x route allocation

by Johan Hovold

Make sure to drop the reference taken when looking up the crossbar platform device during am335x route allocation. Fixes: 42dbdcc6bf96 ("dmaengine: ti-dma-crossbar: Add support for crossbar on AM33xx/AM43xx") Cc: stable(a)vger.kernel.org # 4.4 Cc: Peter Ujfalusi <peter.ujfalusi(a)ti.com> Signed-off-by: Johan Hovold <johan(a)kernel.org> --- drivers/dma/ti/dma-crossbar.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/drivers/dma/ti/dma-crossbar.c b/drivers/dma/ti/dma-crossbar.c index e52b0e139900..ff05b150ad37 100644 --- a/drivers/dma/ti/dma-crossbar.c +++ b/drivers/dma/ti/dma-crossbar.c @@ -79,34 +79,35 @@ static void *ti_am335x_xbar_route_allocate(struct of_phandle_args *dma_spec, { struct platform_device *pdev = of_find_device_by_node(ofdma->of_node); struct ti_am335x_xbar_data *xbar = platform_get_drvdata(pdev); - struct ti_am335x_xbar_map *map; + struct ti_am335x_xbar_map *map = ERR_PTR(-EINVAL); if (dma_spec->args_count != 3) - return ERR_PTR(-EINVAL); + goto out_put_pdev; if (dma_spec->args[2] >= xbar->xbar_events) { dev_err(&pdev->dev, "Invalid XBAR event number: %d\n", dma_spec->args[2]); - return ERR_PTR(-EINVAL); + goto out_put_pdev; } if (dma_spec->args[0] >= xbar->dma_requests) { dev_err(&pdev->dev, "Invalid DMA request line number: %d\n", dma_spec->args[0]); - return ERR_PTR(-EINVAL); + goto out_put_pdev; } /* The of_node_put() will be done in the core for the node */ dma_spec->np = of_parse_phandle(ofdma->of_node, "dma-masters", 0); if (!dma_spec->np) { dev_err(&pdev->dev, "Can't get DMA master\n"); - return ERR_PTR(-EINVAL); + goto out_put_pdev; } map = kzalloc(sizeof(*map), GFP_KERNEL); if (!map) { of_node_put(dma_spec->np); - return ERR_PTR(-ENOMEM); + map = ERR_PTR(-ENOMEM); + goto out_put_pdev; } map->dma_line = (u16)dma_spec->args[0]; @@ -120,6 +121,9 @@ static void *ti_am335x_xbar_route_allocate(struct of_phandle_args *dma_spec, ti_am335x_xbar_write(xbar->iomem, map->dma_line, map->mux_val); +out_put_pdev: + put_device(&pdev->dev); + return map; } -- 2.51.0

1 month, 1 week

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[PATCH 12/15] dmaengine: ti: dma-crossbar: fix device leak on dra7x route allocation

by Johan Hovold

Make sure to drop the reference taken when looking up the crossbar platform device during dra7x route allocation. Note that commit 615a4bfc426e ("dmaengine: ti: Add missing put_device in ti_dra7_xbar_route_allocate") fixed the leak in the error paths but the reference is still leaking on successful allocation. Fixes: a074ae38f859 ("dmaengine: Add driver for TI DMA crossbar on DRA7x") Fixes: 615a4bfc426e ("dmaengine: ti: Add missing put_device in ti_dra7_xbar_route_allocate") Cc: stable(a)vger.kernel.org # 4.2: 615a4bfc426e Cc: Peter Ujfalusi <peter.ujfalusi(a)ti.com> Cc: Miaoqian Lin <linmq006(a)gmail.com> Signed-off-by: Johan Hovold <johan(a)kernel.org> --- drivers/dma/ti/dma-crossbar.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/dma/ti/dma-crossbar.c b/drivers/dma/ti/dma-crossbar.c index 7f17ee87a6dc..e52b0e139900 100644 --- a/drivers/dma/ti/dma-crossbar.c +++ b/drivers/dma/ti/dma-crossbar.c @@ -288,6 +288,8 @@ static void *ti_dra7_xbar_route_allocate(struct of_phandle_args *dma_spec, ti_dra7_xbar_write(xbar->iomem, map->xbar_out, map->xbar_in); + put_device(&pdev->dev); + return map; } -- 2.51.0

1 month, 1 week

1
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[PATCH 03/15] dmaengine: cv1800b-dmamux: fix device leak on route allocation

by Johan Hovold

Make sure to drop the reference taken when looking up the DMA mux platform device during route allocation. Note that holding a reference to a device does not prevent its driver data from going away so there is no point in keeping the reference. Fixes: db7d07b5add4 ("dmaengine: add driver for Sophgo CV18XX/SG200X dmamux") Cc: stable(a)vger.kernel.org # 6.17 Cc: Inochi Amaoto <inochiama(a)gmail.com> Signed-off-by: Johan Hovold <johan(a)kernel.org> --- drivers/dma/cv1800b-dmamux.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/drivers/dma/cv1800b-dmamux.c b/drivers/dma/cv1800b-dmamux.c index e900d6595617..f7a952fcbc7d 100644 --- a/drivers/dma/cv1800b-dmamux.c +++ b/drivers/dma/cv1800b-dmamux.c @@ -102,11 +102,11 @@ static void *cv1800_dmamux_route_allocate(struct of_phandle_args *dma_spec, struct llist_node *node; unsigned long flags; unsigned int chid, devid, cpuid; - int ret; + int ret = -EINVAL; if (dma_spec->args_count != DMAMUX_NCELLS) { dev_err(&pdev->dev, "invalid number of dma mux args\n"); - return ERR_PTR(-EINVAL); + goto err_put_pdev; } devid = dma_spec->args[0]; @@ -115,18 +115,18 @@ static void *cv1800_dmamux_route_allocate(struct of_phandle_args *dma_spec, if (devid > MAX_DMA_MAPPING_ID) { dev_err(&pdev->dev, "invalid device id: %u\n", devid); - return ERR_PTR(-EINVAL); + goto err_put_pdev; } if (cpuid > MAX_DMA_CPU_ID) { dev_err(&pdev->dev, "invalid cpu id: %u\n", cpuid); - return ERR_PTR(-EINVAL); + goto err_put_pdev; } dma_spec->np = of_parse_phandle(ofdma->of_node, "dma-masters", 0); if (!dma_spec->np) { dev_err(&pdev->dev, "can't get dma master\n"); - return ERR_PTR(-EINVAL); + goto err_put_pdev; } spin_lock_irqsave(&dmamux->lock, flags); @@ -136,8 +136,6 @@ static void *cv1800_dmamux_route_allocate(struct of_phandle_args *dma_spec, if (map->peripheral == devid && map->cpu == cpuid) goto found; } - - ret = -EINVAL; goto failed; } else { node = llist_del_first(&dmamux->free_maps); @@ -171,12 +169,17 @@ static void *cv1800_dmamux_route_allocate(struct of_phandle_args *dma_spec, dev_dbg(&pdev->dev, "register channel %u for req %u (cpu %u)\n", chid, devid, cpuid); + put_device(&pdev->dev); + return map; failed: spin_unlock_irqrestore(&dmamux->lock, flags); of_node_put(dma_spec->np); dev_err(&pdev->dev, "errno %d\n", ret); +err_put_pdev: + put_device(&pdev->dev); + return ERR_PTR(ret); } -- 2.51.0

1 month, 1 week

1
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[PATCH 02/15] dmaengine: bcm-sba-raid: fix device leak on probe

by Johan Hovold

Make sure to drop the reference taken when looking up the mailbox device during probe on probe failures and on driver unbind. Fixes: 743e1c8ffe4e ("dmaengine: Add Broadcom SBA RAID driver") Cc: stable(a)vger.kernel.org # 4.13 Signed-off-by: Johan Hovold <johan(a)kernel.org> --- drivers/dma/bcm-sba-raid.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/dma/bcm-sba-raid.c b/drivers/dma/bcm-sba-raid.c index 7f0e76439ce5..ed037fa883f6 100644 --- a/drivers/dma/bcm-sba-raid.c +++ b/drivers/dma/bcm-sba-raid.c @@ -1699,7 +1699,7 @@ static int sba_probe(struct platform_device *pdev) /* Prealloc channel resource */ ret = sba_prealloc_channel_resources(sba); if (ret) - goto fail_free_mchan; + goto fail_put_mbox; /* Check availability of debugfs */ if (!debugfs_initialized()) @@ -1729,6 +1729,8 @@ static int sba_probe(struct platform_device *pdev) fail_free_resources: debugfs_remove_recursive(sba->root); sba_freeup_channel_resources(sba); +fail_put_mbox: + put_device(sba->mbox_dev); fail_free_mchan: mbox_free_channel(sba->mchan); return ret; @@ -1744,6 +1746,8 @@ static void sba_remove(struct platform_device *pdev) sba_freeup_channel_resources(sba); + put_device(sba->mbox_dev); + mbox_free_channel(sba->mchan); } -- 2.51.0

1 month, 1 week

1
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[PATCH] usb: dwc3: gadget: Prevent EPs resource conflict during StartTransfer

by Selvarasu Ganesan

This commit fixes the below warning that occurs when a StartTransfer command is issued for bulk or interrupt endpoints in `dwc3_gadget_ep_enable` while a previous transfer on the same endpoint is still in progress. The gadget functions drivers can invoke usb_ep_enable (which triggers a new StartTransfer command) before the earlier transfer has completed. Because the previous StartTransfer is still active, `dwc3_gadget_ep_disable` can skip the required `EndTransfer` due to `DWC3_EP_DELAY_STOP`, leading to the endpoint resources are busy for previous StartTransfer and warning ("No resource for ep") from gadget driver. To resolve this, a check is added to `dwc3_gadget_ep_enable` that checks the `DWC3_EP_TRANSFER_STARTED` flag before issuing a new StartTransfer. By preventing a second StartTransfer on an already busy endpoint, the resource conflict is eliminated, the warning disappears, and potential kernel panics caused by `panic_on_warn` are avoided. ------------[ cut here ]------------ dwc3 13200000.dwc3: No resource for ep1out WARNING: CPU: 0 PID: 700 at drivers/usb/dwc3/gadget.c:398 dwc3_send_gadget_ep_cmd+0x2f8/0x76c Call trace: dwc3_send_gadget_ep_cmd+0x2f8/0x76c __dwc3_gadget_ep_enable+0x490/0x7c0 dwc3_gadget_ep_enable+0x6c/0xe4 usb_ep_enable+0x5c/0x15c mp_eth_stop+0xd4/0x11c __dev_close_many+0x160/0x1c8 __dev_change_flags+0xfc/0x220 dev_change_flags+0x24/0x70 devinet_ioctl+0x434/0x524 inet_ioctl+0xa8/0x224 sock_do_ioctl+0x74/0x128 sock_ioctl+0x3bc/0x468 __arm64_sys_ioctl+0xa8/0xe4 invoke_syscall+0x58/0x10c el0_svc_common+0xa8/0xdc do_el0_svc+0x1c/0x28 el0_svc+0x38/0x88 el0t_64_sync_handler+0x70/0xbc el0t_64_sync+0x1a8/0x1ac Change-Id: Id292265a34448e566ef1ea882e313856423342dc Fixes: a97ea994605e ("usb: dwc3: gadget: offset Start Transfer latency for bulk EPs") Cc: stable(a)vger.kernel.org Signed-off-by: Selvarasu Ganesan <selvarasu.g(a)samsung.com> --- drivers/usb/dwc3/gadget.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index f95d1369bbc6..23e5c111da7c 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -951,8 +951,9 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, unsigned int action) * Issue StartTransfer here with no-op TRB so we can always rely on No * Response Update Transfer command. */ - if (usb_endpoint_xfer_bulk(desc) || - usb_endpoint_xfer_int(desc)) { + if ((usb_endpoint_xfer_bulk(desc) || + usb_endpoint_xfer_int(desc)) && + !(dep->flags & DWC3_EP_TRANSFER_STARTED)) { struct dwc3_gadget_ep_cmd_params params; struct dwc3_trb *trb; dma_addr_t trb_dma; -- 2.34.1

1 month, 1 week

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