Description
In the Linux kernel, the following vulnerability has been resolved: Drivers: vmbus: Check for channel allocation before looking up relids relid2channel() assumes vmbus channel array to be allocated when called. However, in cases such as kdump/kexec, not all relids will be reset by the host. When the second kernel boots and if the guest receives a vmbus interrupt during vmbus driver initialization before vmbus_connect() is called, before it finishes, or if it fails, the vmbus interrupt service routine is called which in turn calls relid2channel() and can cause a null pointer dereference. Print a warning and error out in relid2channel() for a channel id that's invalid in the second kernel.
Product status
8b6a877c060ed6b86878fe66c7c6493a6054cf23 (git) before 176c6b4889195fbe7016d9401175b48c5c9edf68
8b6a877c060ed6b86878fe66c7c6493a6054cf23 (git) before c373e49fbb87aa177819866ed9194ebc5414dfd6
8b6a877c060ed6b86878fe66c7c6493a6054cf23 (git) before 8c3f0ae5435fd20bb1e3a8308488aa6ac33151ee
8b6a877c060ed6b86878fe66c7c6493a6054cf23 (git) before a5c44f3446a0565139b7d8abc78f58b86c398123
8b6a877c060ed6b86878fe66c7c6493a6054cf23 (git) before 1eb65c8687316c65140b48fad27133d583178e15
5.8
Any version before 5.8
5.10.178 (semver)
5.15.107 (semver)
6.1.24 (semver)
6.2.11 (semver)
6.3 (original_commit_for_fix)
References
git.kernel.org/...c/176c6b4889195fbe7016d9401175b48c5c9edf68
git.kernel.org/...c/c373e49fbb87aa177819866ed9194ebc5414dfd6
git.kernel.org/...c/8c3f0ae5435fd20bb1e3a8308488aa6ac33151ee
git.kernel.org/...c/a5c44f3446a0565139b7d8abc78f58b86c398123
git.kernel.org/...c/1eb65c8687316c65140b48fad27133d583178e15
