CVE-2026-23043

In the Linux kernel, the following vulnerability has been resolved:

btrfs: fix NULL pointer dereference in doabortlog_replay()

Coverity reported a NULL pointer dereference issue (CID 1666756) in doabortlogreplay(). When btrfsallocpath() fails in replayonebuffer(), wc->subvolpath is NULL, but btrfsabortlogreplay() calls doabortlogreplay() which unconditionally dereferences wc->subvolpath when attempting to print debug information. Fix this by adding a NULL check before dereferencing wc->subvolpath in doabortlog_replay().