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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
8b6a877c060ed6b86878fe66c7c6493a6054cf23 to < 176c6b4889195fbe7016d9401175b48c5c9edf68affected8b6a877c060ed6b86878fe66c7c6493a6054cf23 to < c373e49fbb87aa177819866ed9194ebc5414dfd6affected8b6a877c060ed6b86878fe66c7c6493a6054cf23 to < 8c3f0ae5435fd20bb1e3a8308488aa6ac33151eeaffected8b6a877c060ed6b86878fe66c7c6493a6054cf23 to < a5c44f3446a0565139b7d8abc78f58b86c398123affected8b6a877c060ed6b86878fe66c7c6493a6054cf23 to < 1eb65c8687316c65140b48fad27133d583178e15affected
Linux Linux
Default version status: affected
5.8affected0 to < 5.8unaffected5.10.178 to ≤ 5.10.*unaffected5.15.107 to ≤ 5.15.*unaffected6.1.24 to ≤ 6.1.*unaffected6.2.11 to ≤ 6.2.*unaffected6.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/176c6b4889195fbe7016d9401175b48c5c9edf68 ↗
- https://git.kernel.org/stable/c/c373e49fbb87aa177819866ed9194ebc5414dfd6 ↗
- https://git.kernel.org/stable/c/8c3f0ae5435fd20bb1e3a8308488aa6ac33151ee ↗
- https://git.kernel.org/stable/c/a5c44f3446a0565139b7d8abc78f58b86c398123 ↗
- https://git.kernel.org/stable/c/1eb65c8687316c65140b48fad27133d583178e15 ↗