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* [PATCH AUTOSEL 6.12 01/18] 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 6.12 02/18] HID: quirks: Add ADATA XPG alpha wireless mouse support Sasha Levin
                   ` (16 more replies)
  0 siblings, 17 replies; 18+ 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 57f1bf2ab20be..48210760bdf87 100644
--- a/drivers/dma/idxd/cdev.c
+++ b/drivers/dma/idxd/cdev.c
@@ -225,7 +225,7 @@ 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;
 
@@ -322,7 +322,7 @@ 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] 18+ messages in thread

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

Thread overview: 18+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2025-05-19 21:21 [PATCH AUTOSEL 6.12 01/18] dmaengine: idxd: cdev: Fix uninitialized use of sva in idxd_cdev_open Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.12 02/18] HID: quirks: Add ADATA XPG alpha wireless mouse support Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.12 03/18] nfs: don't share pNFS DS connections between net namespaces Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.12 04/18] platform/x86: thinkpad_acpi: Support also NEC Lavie X1475JAS Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.12 05/18] um: let 'make clean' properly clean underlying SUBARCH as well Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.12 06/18] gpio: virtuser: fix potential out-of-bound write Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.12 07/18] drm/amd/display: fix link_set_dpms_off multi-display MST corner case Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.12 08/18] drm/amd/display: check stream id dml21 wrapper to get plane_id Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.12 09/18] phy: starfive: jh7110-usb: Fix USB 2.0 host occasional detection failure Sasha Levin
2025-05-19 21:21 ` [PATCH AUTOSEL 6.12 10/18] phy: phy-rockchip-samsung-hdptx: Fix PHY PLL output 50.25MHz error Sasha Levin
2025-05-19 21:22 ` [PATCH AUTOSEL 6.12 11/18] spi: spi-sun4i: fix early activation Sasha Levin
2025-05-19 21:22 ` [PATCH AUTOSEL 6.12 12/18] phy: renesas: rcar-gen3-usb2: Move IRQ request in probe Sasha Levin
2025-05-19 21:22 ` [PATCH AUTOSEL 6.12 13/18] nvme-pci: add NVME_QUIRK_NO_DEEPEST_PS quirk for SOLIDIGM P44 Pro Sasha Levin
2025-05-19 21:22 ` [PATCH AUTOSEL 6.12 14/18] drm/xe/xe2hpg: Add Wa_22021007897 Sasha Levin
2025-05-19 21:22 ` [PATCH AUTOSEL 6.12 15/18] drm/xe: Save the gt pointer in lrc and drop the tile Sasha Levin
2025-05-19 21:22 ` [PATCH AUTOSEL 6.12 16/18] char: tpm: tpm-buf: Add sanity check fallback in read helpers Sasha Levin
2025-05-19 21:22 ` [PATCH AUTOSEL 6.12 17/18] tpm: tis: Double the timeout B to 4s Sasha Levin
2025-05-19 21:22 ` [PATCH AUTOSEL 6.12 18/18] NFS: Avoid flushing data while holding directory locks in nfs_rename() Sasha Levin

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