{"id":"CVE-2024-46851","summary":"drm/amd/display: Avoid race between dcn10_set_drr() and dc_state_destruct()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Avoid race between dcn10_set_drr() and dc_state_destruct()\n\ndc_state_destruct() nulls the resource context of the DC state. The pipe\ncontext passed to dcn10_set_drr() is a member of this resource context.\n\nIf dc_state_destruct() is called parallel to the IRQ processing (which\ncalls dcn10_set_drr() at some point), we can end up using already nulled\nfunction callback fields of struct stream_resource.\n\nThe logic in dcn10_set_drr() already tries to avoid this, by checking tg\nagainst NULL. But if the nulling happens exactly after the NULL check and\nbefore the next access, then we get a race.\n\nAvoid this by copying tg first to a local variable, and then use this\nvariable for all the operations. This should work, as long as nobody\nfrees the resource pool where the timing generators live.\n\n(cherry picked from commit a3cc326a43bdc48fbdf53443e1027a03e309b643)","modified":"2026-03-20T12:37:58.000845Z","published":"2024-09-27T12:42:44.619Z","related":["SUSE-SU-2024:3984-1","SUSE-SU-2024:3986-1","SUSE-SU-2024:4318-1","SUSE-SU-2024:4387-1","SUSE-SU-2025:20163-1","SUSE-SU-2025:20164-1","SUSE-SU-2025:20246-1","SUSE-SU-2025:20247-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/46xxx/CVE-2024-46851.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/a7aeb03888b92304e2fc7d4d1c242f54a312561b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b6ce047a81f508f5c60756db8dfb5ff486e4dad0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/46xxx/CVE-2024-46851.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-46851"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"06ad7e16425619a4a77154c2e85bededb3e04a4f"},{"fixed":"b6ce047a81f508f5c60756db8dfb5ff486e4dad0"},{"fixed":"a7aeb03888b92304e2fc7d4d1c242f54a312561b"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-46851.json"}}],"schema_version":"1.7.5"}