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* [PATCH AUTOSEL 6.14 01/23] dmaengine: idxd: cdev: Fix uninitialized use of sva in idxd_cdev_open
@ 2025-05-19 21:21 Sasha Levin
  2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 02/23] HID: amd_sfh: Avoid clearing reports for SRA sensor Sasha Levin
                   ` (21 more replies)
  0 siblings, 22 replies; 23+ messages in thread
From: Sasha Levin @ 2025-05-19 21:21 UTC (permalink / raw)
  To: patches, stable
  Cc: Purva Yeshi, Dave Jiang, Vinicius Costa Gomes, Vinod Koul,
	Sasha Levin, dmaengine, linux-kernel

From: Purva Yeshi <purvayeshi550@gmail.com>

[ Upstream commit 97994333de2b8062d2df4e6ce0dc65c2dc0f40dc ]

Fix Smatch-detected issue:
drivers/dma/idxd/cdev.c:321 idxd_cdev_open() error:
uninitialized symbol 'sva'.

'sva' pointer may be used uninitialized in error handling paths.
Specifically, if PASID support is enabled and iommu_sva_bind_device()
returns an error, the code jumps to the cleanup label and attempts to
call iommu_sva_unbind_device(sva) without ensuring that sva was
successfully assigned. This triggers a Smatch warning about an
uninitialized symbol.

Initialize sva to NULL at declaration and add a check using
IS_ERR_OR_NULL() before unbinding the device. This ensures the
function does not use an invalid or uninitialized pointer during
cleanup.

Signed-off-by: Purva Yeshi <purvayeshi550@gmail.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Link: https://lore.kernel.org/r/20250410110216.21592-1-purvayeshi550@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/dma/idxd/cdev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c
index ff94ee892339d..7bd031a608943 100644
--- a/drivers/dma/idxd/cdev.c
+++ b/drivers/dma/idxd/cdev.c
@@ -222,7 +222,7 @@ static int idxd_cdev_open(struct inode *inode, struct file *filp)
 	struct idxd_wq *wq;
 	struct device *dev, *fdev;
 	int rc = 0;
-	struct iommu_sva *sva;
+	struct iommu_sva *sva = NULL;
 	unsigned int pasid;
 	struct idxd_cdev *idxd_cdev;
 
@@ -317,7 +317,7 @@ static int idxd_cdev_open(struct inode *inode, struct file *filp)
 	if (device_user_pasid_enabled(idxd))
 		idxd_xa_pasid_remove(ctx);
 failed_get_pasid:
-	if (device_user_pasid_enabled(idxd))
+	if (device_user_pasid_enabled(idxd) && !IS_ERR_OR_NULL(sva))
 		iommu_sva_unbind_device(sva);
 failed:
 	mutex_unlock(&wq->wq_lock);
-- 
2.39.5


^ permalink raw reply related	[flat|nested] 23+ messages in thread

end of thread, other threads:[~2025-05-19 21:22 UTC | newest]

Thread overview: 23+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2025-05-19 21:21 [PATCH AUTOSEL 6.14 01/23] dmaengine: idxd: cdev: Fix uninitialized use of sva in idxd_cdev_open Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 02/23] HID: amd_sfh: Avoid clearing reports for SRA sensor Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 03/23] HID: quirks: Add ADATA XPG alpha wireless mouse support Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 04/23] nfs: don't share pNFS DS connections between net namespaces Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 05/23] platform/x86: thinkpad_acpi: Support also NEC Lavie X1475JAS Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 06/23] kbuild: Require pahole <v1.28 or >v1.29 with GENDWARFKSYMS on X86 Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 07/23] um: let 'make clean' properly clean underlying SUBARCH as well Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 08/23] nvmet: pci-epf: cleanup nvmet_pci_epf_raise_irq() Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 09/23] gpio: virtuser: fix potential out-of-bound write Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 10/23] drm/amd/display: fix link_set_dpms_off multi-display MST corner case Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 11/23] drm/amd/display: check stream id dml21 wrapper to get plane_id Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 12/23] nvme: multipath: enable BLK_FEAT_ATOMIC_WRITES for multipathing Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 13/23] phy: starfive: jh7110-usb: Fix USB 2.0 host occasional detection failure Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 14/23] phy: phy-rockchip-samsung-hdptx: Fix PHY PLL output 50.25MHz error Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 15/23] spi: spi-sun4i: fix early activation Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 16/23] phy: renesas: rcar-gen3-usb2: Move IRQ request in probe Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 17/23] nvme: all namespaces in a subsystem must adhere to a common atomic write size Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 18/23] nvme-pci: add NVME_QUIRK_NO_DEEPEST_PS quirk for SOLIDIGM P44 Pro Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 19/23] drm/xe/xe2hpg: Add Wa_22021007897 Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 20/23] drm/xe: Save the gt pointer in lrc and drop the tile Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 21/23] char: tpm: tpm-buf: Add sanity check fallback in read helpers Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 22/23] tpm: tis: Double the timeout B to 4s Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.14 23/23] NFS: Avoid flushing data while holding directory locks in nfs_rename() Sasha Levin

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