Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Destroy KFD debugfs after destroy KFD wq Since KFD proc content was moved to kernel debugfs, we can't destroy KFD debugfs before kfd_process_destroy_wq. Move kfd_process_destroy_wq prior to kfd_debugfs_fini to fix a kernel NULL pointer problem. It happens when /sys/kernel/debug/kfd was already destroyed in kfd_debugfs_fini but kfd_process_destroy_wq calls kfd_debugfs_remove_process. This line debugfs_remove_recursive(entry->proc_dentry); tries to remove /sys/kernel/debug/kfd/proc/<pid> while /sys/kernel/debug/kfd is already gone. It hangs the kernel by kernel NULL pointer. (cherry picked from commit 0333052d90683d88531558dcfdbf2525cc37c233)
Product status
4a488a7ad71401169cecee75dc94bcce642e2c53 (git) before fc35c955da799ba62f6f977d58e0866d0251e3f8
4a488a7ad71401169cecee75dc94bcce642e2c53 (git) before 74ee7445c3b61c3bd899a54bd82c1982cb3a8206
4a488a7ad71401169cecee75dc94bcce642e2c53 (git) before 96609a51e6134542bf90e053c2cd2fe4f61ebce3
4a488a7ad71401169cecee75dc94bcce642e2c53 (git) before 910735ded17cc306625e7e1cdcc8102f7ac60994
4a488a7ad71401169cecee75dc94bcce642e2c53 (git) before 2e58401a24e7b2d4ec619104e1a76590c1284a4c
3.19
Any version before 3.19
6.1.149 (semver)
6.6.103 (semver)
6.12.44 (semver)
6.16.4 (semver)
6.17 (original_commit_for_fix)
References
git.kernel.org/...c/fc35c955da799ba62f6f977d58e0866d0251e3f8
git.kernel.org/...c/74ee7445c3b61c3bd899a54bd82c1982cb3a8206
git.kernel.org/...c/96609a51e6134542bf90e053c2cd2fe4f61ebce3
git.kernel.org/...c/910735ded17cc306625e7e1cdcc8102f7ac60994
git.kernel.org/...c/2e58401a24e7b2d4ec619104e1a76590c1284a4c
