{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80919", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.801Z", "datePublished": "2026-09-09T16:13:16.415Z", "dateUpdated": "2026-09-09T16:13:16.415Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-09T16:13:16.415Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix recursive ww_mutex acquire in amdgpu_devcoredump_format\n\nWhen dumping IB contents from a hung job, amdgpu_devcoredump_format()\nacquired the VM root PD's reservation via amdgpu_vm_lock_by_pasid() and\nthen, for each IB, called amdgpu_bo_reserve() on the BO backing the IB.\nBoth reservations are reservation_ww_class_mutex objects and neither\nused a ww_acquire_ctx, which trips lockdep:\n\n WARNING: possible recursive locking detected\n --------------------------------------------\n kworker/u128:0 is trying to acquire lock:\n ffff88838b16e1f0 (reservation_ww_class_mutex){+.+.}-{4:4},\n at: amdgpu_devcoredump_format+0x1594/0x23f0 [amdgpu]\n\n but task is already holding lock:\n ffff8882f82681f0 (reservation_ww_class_mutex){+.+.}-{4:4},\n at: amdgpu_devcoredump_format+0x1594/0x23f0 [amdgpu]\n\n Possible unsafe locking scenario:\n CPU0\n ----\n lock(reservation_ww_class_mutex);\n lock(reservation_ww_class_mutex);\n\n *** DEADLOCK ***\n May be due to missing lock nesting notation\n\n Workqueue: events_unbound amdgpu_devcoredump_deferred_work [amdgpu]\n Call Trace:\n __ww_mutex_lock.constprop.0\n ww_mutex_lock\n amdgpu_bo_reserve\n amdgpu_devcoredump_format+0x1594 [amdgpu]\n amdgpu_devcoredump_deferred_work+0xea [amdgpu]\n\nThe two reservations are on different BOs in the captured trace, so the\nsplat is a lockdep-correctness warning, not an observed deadlock. It\nbecomes a real self-deadlock whenever the IB BO shares its dma_resv with\nthe root PD (the always-valid case, see amdgpu_vm_is_bo_always_valid()):\namdgpu_bo_reserve(abo) re-acquires the same ww_mutex without a ticket\nand blocks forever. With amdgpu.gpu_recovery=0 the timeout handler\nrefires every ~2 s and each invocation produces this splat, drowning the\nkernel ring buffer.\n\nNow that amdgpu_vm_lock_by_pasid() takes a drm_exec context, move the IB\ndumping into a separate helper that locks the root PD and every IB BO\ntogether in a single drm_exec ticket. DRM_EXEC_IGNORE_DUPLICATES handles\nIB BOs that share a dma_resv (e.g. always-valid BOs, or two IBs backed\nby the same BO). Every lock is now a top-level acquire under one\nww_acquire_ctx, so the recursive ww_mutex condition is gone, and the\nper-IB amdgpu_bo_reserve()/amdgpu_bo_unref() dance -- including a BO\nrefcount leak on the amdgpu_bo_reserve() failure path -- is removed.\n\n(cherry picked from commit d6bf4242731219ee08ce54c365631e395486651e)"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/amdgpu/amdgpu_dev_coredump.c"], "versions": [{"version": "7b15fc2d1f1a00fb99f0146e404ff2600999ec74", "lessThan": "4e9b4dee0777ec9c835a4746e2d30382dd9d1044", "status": "affected", "versionType": "git"}, {"version": "7b15fc2d1f1a00fb99f0146e404ff2600999ec74", "lessThan": "7152b248dc3c8d5fa8629e99ed5655dd41b51562", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/amdgpu/amdgpu_dev_coredump.c"], "versions": [{"version": "7.1", "status": "affected"}, {"version": "0", "lessThan": "7.1", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.11", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1", "versionEndExcluding": "7.1.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4e9b4dee0777ec9c835a4746e2d30382dd9d1044"}, {"url": "https://git.kernel.org/stable/c/7152b248dc3c8d5fa8629e99ed5655dd41b51562"}], "title": "drm/amdgpu: fix recursive ww_mutex acquire in amdgpu_devcoredump_format", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/amd/amdgpu/amdgpu_dev_coredump.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4e9b4dee0777ec9c835a4746e2d30382dd9d1044", "status": "affected", "version": "7b15fc2d1f1a00fb99f0146e404ff2600999ec74", "versionType": "git"}, {"lessThan": "7152b248dc3c8d5fa8629e99ed5655dd41b51562", "status": "affected", "version": "7b15fc2d1f1a00fb99f0146e404ff2600999ec74", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/amd/amdgpu/amdgpu_dev_coredump.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.1"}, {"lessThan": "7.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.11", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix recursive ww_mutex acquire in amdgpu_devcoredump_format\n\nWhen dumping IB contents from a hung job, amdgpu_devcoredump_format()\nacquired the VM root PD's reservation via amdgpu_vm_lock_by_pasid() and\nthen, for each IB, called amdgpu_bo_reserve() on the BO backing the IB.\nBoth reservations are reservation_ww_class_mutex objects and neither\nused a ww_acquire_ctx, which trips lockdep:\n\n WARNING: possible recursive locking detected\n --------------------------------------------\n kworker/u128:0 is trying to acquire lock:\n ffff88838b16e1f0 (reservation_ww_class_mutex){+.+.}-{4:4},\n at: amdgpu_devcoredump_format+0x1594/0x23f0 [amdgpu]\n\n but task is already holding lock:\n ffff8882f82681f0 (reservation_ww_class_mutex){+.+.}-{4:4},\n at: amdgpu_devcoredump_format+0x1594/0x23f0 [amdgpu]\n\n Possible unsafe locking scenario:\n CPU0\n ----\n lock(reservation_ww_class_mutex);\n lock(reservation_ww_class_mutex);\n\n *** DEADLOCK ***\n May be due to missing lock nesting notation\n\n Workqueue: events_unbound amdgpu_devcoredump_deferred_work [amdgpu]\n Call Trace:\n __ww_mutex_lock.constprop.0\n ww_mutex_lock\n amdgpu_bo_reserve\n amdgpu_devcoredump_format+0x1594 [amdgpu]\n amdgpu_devcoredump_deferred_work+0xea [amdgpu]\n\nThe two reservations are on different BOs in the captured trace, so the\nsplat is a lockdep-correctness warning, not an observed deadlock. It\nbecomes a real self-deadlock whenever the IB BO shares its dma_resv with\nthe root PD (the always-valid case, see amdgpu_vm_is_bo_always_valid()):\namdgpu_bo_reserve(abo) re-acquires the same ww_mutex without a ticket\nand blocks forever. With amdgpu.gpu_recovery=0 the timeout handler\nrefires every ~2 s and each invocation produces this splat, drowning the\nkernel ring buffer.\n\nNow that amdgpu_vm_lock_by_pasid() takes a drm_exec context, move the IB\ndumping into a separate helper that locks the root PD and every IB BO\ntogether in a single drm_exec ticket. DRM_EXEC_IGNORE_DUPLICATES handles\nIB BOs that share a dma_resv (e.g. always-valid BOs, or two IBs backed\nby the same BO). Every lock is now a top-level acquire under one\nww_acquire_ctx, so the recursive ww_mutex condition is gone, and the\nper-IB amdgpu_bo_reserve()/amdgpu_bo_unref() dance -- including a BO\nrefcount leak on the amdgpu_bo_reserve() failure path -- is removed.\n\n(cherry picked from commit d6bf4242731219ee08ce54c365631e395486651e)"}], "id": "CVE-2026-80919", "lastModified": "2026-09-09T17:17:47.003", "metrics": {}, "published": "2026-09-09T17:17:47.003", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4e9b4dee0777ec9c835a4746e2d30382dd9d1044"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7152b248dc3c8d5fa8629e99ed5655dd41b51562"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}