Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fix a Null pointer dereference vulnerability [Why] A null pointer dereference vulnerability exists in the AMD display driver's (DC module) cleanup function dc_destruct(). When display control context (dc->ctx) construction fails (due to memory allocation failure), this pointer remains NULL. During subsequent error handling when dc_destruct() is called, there's no NULL check before dereferencing the perf_trace member (dc->ctx->perf_trace), causing a kernel null pointer dereference crash. [How] Check if dc->ctx is non-NULL before dereferencing. (Updated commit text and removed unnecessary error message) (cherry picked from commit 9dd8e2ba268c636c240a918e0a31e6feaee19404)
Product status
4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c (git) before 0961673cc5f0055957aa46f25eb4ef6c07e00165
4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c (git) before 4ade995b9b25b3c6e8dc42c27070340f1358d8c8
4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c (git) before 1bcf63a44381691d6192872801f830ce3250e367
4.15
Any version before 4.15
6.12.44 (semver)
6.16.4 (semver)
6.17 (original_commit_for_fix)
References
git.kernel.org/...c/0961673cc5f0055957aa46f25eb4ef6c07e00165
git.kernel.org/...c/4ade995b9b25b3c6e8dc42c27070340f1358d8c8
git.kernel.org/...c/1bcf63a44381691d6192872801f830ce3250e367
