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drm/nouveau: fix nvkm_device leak on aperture removal failure

PATCH Applied David Carlier 2 participants 2 messages Apr 11 – Apr 15

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PATCH 1/1 drm/nouveau: fix nvkm_device leak on aperture removal failure

When aperture_remove_conflicting_pci_devices() fails during probe, the error path returns directly without unwinding the nvkm_device that was just allocated by nvkm_device_pci_new(). This leaks both the device wrapper and the pci_enable_device() reference taken inside it.

Jump to the existing fail_nvkm label so nvkm_device_del() runs and balances both. The leak was introduced when the intermediate nvkm_device_del() between detection and aperture removal was dropped in favor of creating the pci device once.

Fixes c0bfe34330b5 ("drm/nouveau: create pci device once")
---
 drivers/gpu/drm/nouveau/nouveau_drm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
drivers/gpu/drm/nouveau/nouveau_drm.c +1 -1
index 5d8475e4895e..517ff2c31dce 100644
@@ -875,7 +875,7 @@ static int nouveau_drm_probe(struct pci_dev *pdev,
 	/* Remove conflicting drivers (vesafb, efifb etc). */
 	ret = aperture_remove_conflicting_pci_devices(pdev, driver_pci.name);
 	if (ret)
-		return ret;
+		goto fail_nvkm;
 
 	pci_set_master(pdev);
 
Signature · 1 line
2.53.0
maintainer Applied
#1 lore raw
Quoted 1 line · David Carlier

[PATCH] drm/nouveau: fix nvkm_device leak on aperture removal failure

Applied, thanks!

Branch: drm-misc-fixes
Tree: https://gitlab.freedesktop.org/drm/misc/kernel.git

[1/1] drm/nouveau: fix nvkm_device leak on aperture removal failure

      commit: 6597ff1d8de3

The patch will appear in the next linux-next integration (typically within 24 hours on weekdays.)

The patch is queued up for Linus's tree and should land in the next -rc release.