Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: add a sanity check for btrfs root in btrfs_search_slot() Syzbot reports a null-ptr-deref in btrfs_search_slot(). The reproducer is using rescue=ibadroots, and the extent tree root is corrupted thus the extent tree is NULL. When scrub tries to search the extent tree to gather the needed extent info, btrfs_search_slot() doesn't check if the target root is NULL or not, resulting the null-ptr-deref. Add sanity check for btrfs root before using it in btrfs_search_slot().
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
42437a6386ffeaaf200731e73d723ea491f3fe7d to < c71d114ef68c95da5a82ec85a721ab31f5bd905baffected42437a6386ffeaaf200731e73d723ea491f3fe7d to < db66fb87c21e8ae724886e6a464dcbac562a64c6affected42437a6386ffeaaf200731e73d723ea491f3fe7d to < 757171d1369b3b47f36932d40a05a0715496dcabaffected42437a6386ffeaaf200731e73d723ea491f3fe7d to < 93992c3d9629b02dccf6849238559d5c24f2deceaffected42437a6386ffeaaf200731e73d723ea491f3fe7d to < 3ed51857a50f530ac7a1482e069dfbd1298558d4affected
Linux Linux
Default version status: affected
5.11affected0 to < 5.11unaffected5.15.174 to ≤ 5.15.*unaffected6.1.120 to ≤ 6.1.*unaffected6.6.64 to ≤ 6.6.*unaffected6.12.4 to ≤ 6.12.*unaffected6.13 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/c71d114ef68c95da5a82ec85a721ab31f5bd905b ↗
- https://git.kernel.org/stable/c/db66fb87c21e8ae724886e6a464dcbac562a64c6 ↗
- https://git.kernel.org/stable/c/757171d1369b3b47f36932d40a05a0715496dcab ↗
- https://git.kernel.org/stable/c/93992c3d9629b02dccf6849238559d5c24f2dece ↗
- https://git.kernel.org/stable/c/3ed51857a50f530ac7a1482e069dfbd1298558d4 ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html ↗