CVE-2024-56774

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux42437a6386ffeaaf200731e73d723ea491f3fe7d < c71d114ef68c95da5a82ec85a721ab31f5bd905baffected
LinuxLinux42437a6386ffeaaf200731e73d723ea491f3fe7d < db66fb87c21e8ae724886e6a464dcbac562a64c6affected
LinuxLinux42437a6386ffeaaf200731e73d723ea491f3fe7d < 757171d1369b3b47f36932d40a05a0715496dcabaffected
LinuxLinux42437a6386ffeaaf200731e73d723ea491f3fe7d < 93992c3d9629b02dccf6849238559d5c24f2deceaffected
LinuxLinux42437a6386ffeaaf200731e73d723ea491f3fe7d < 3ed51857a50f530ac7a1482e069dfbd1298558d4affected
LinuxLinux5.11affected
LinuxLinux0 < 5.11unaffected
LinuxLinux5.15.174 <= 5.15.*unaffected
LinuxLinux6.1.120 <= 6.1.*unaffected
LinuxLinux6.6.64 <= 6.6.*unaffected
LinuxLinux6.12.4 <= 6.12.*unaffected
LinuxLinux6.13 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References