5.5

CVE-2021-47142

drm/amdgpu: Fix a use-after-free

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: Fix a use-after-free

looks like we forget to set ttm->sg to NULL.
Hit panic below

[ 1235.844104] general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b7b4b: 0000 [#1] SMP DEBUG_PAGEALLOC NOPTI
[ 1235.989074] Call Trace:
[ 1235.991751]  sg_free_table+0x17/0x20
[ 1235.995667]  amdgpu_ttm_backend_unbind.cold+0x4d/0xf7 [amdgpu]
[ 1236.002288]  amdgpu_ttm_backend_destroy+0x29/0x130 [amdgpu]
[ 1236.008464]  ttm_tt_destroy+0x1e/0x30 [ttm]
[ 1236.013066]  ttm_bo_cleanup_memtype_use+0x51/0xa0 [ttm]
[ 1236.018783]  ttm_bo_release+0x262/0xa50 [ttm]
[ 1236.023547]  ttm_bo_put+0x82/0xd0 [ttm]
[ 1236.027766]  amdgpu_bo_unref+0x26/0x50 [amdgpu]
[ 1236.032809]  amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu+0x7aa/0xd90 [amdgpu]
[ 1236.040400]  kfd_ioctl_alloc_memory_of_gpu+0xe2/0x330 [amdgpu]
[ 1236.046912]  kfd_ioctl+0x463/0x690 [amdgpu]
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version < 4.4.271
Linux ≫ Linux Kernel Version >= 4.9.0 < 4.9.271
Linux ≫ Linux Kernel Version >= 4.14.0 < 4.14.235
Linux ≫ Linux Kernel Version >= 4.19.0 < 4.19.193
Linux ≫ Linux Kernel Version >= 5.4.0 < 5.4.124
Linux ≫ Linux Kernel Version >= 5.10.0 < 5.10.42
Linux ≫ Linux Kernel Version >= 5.12.0 < 5.12.9
Linux ≫ Linux Kernel Version5.13 Updaterc1
Linux ≫ Linux Kernel Version5.13 Updaterc2
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.23% 0.14
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/0707c3fea8102d211631ba515ef2159707561b0d
Patch
https://git.kernel.org/stable/c/1e5c37385097c35911b0f8a0c67ffd10ee1af9a2
Patch
https://git.kernel.org/stable/c/3293cf3513d69f00c14d43e2020826d45ea0e46a
Patch
https://git.kernel.org/stable/c/7398c2aab4da960761ec182d04d6d5abbb4a226e
Patch
https://git.kernel.org/stable/c/952ab3f9f48eb0e8050596d41951cf516be6b122
Patch
https://git.kernel.org/stable/c/a849e218556f932576c0fb1c5a88714b61709a17
Patch
https://git.kernel.org/stable/c/d4ea141fd4b40636a8326df5a377d9c5cf9b3faa
Patch
https://git.kernel.org/stable/c/f98cdf084405333ee2f5be548a91b2d168e49276
Patch