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medium5.5

CVE-2024-56774

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-d…

Impact

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

VendorProductAffected versions
LinuxLinux Kernel
from 5.11 before 5.15.174
from 5.16 before 6.1.120
from 6.2 before 6.6.64
from 6.7 before 6.12.4
Version 6.13

Weakness classification

CWE-476

References