Linux Kernel Btrfs Null Pointer Dereference Vulnerability in btrfs_search_slot()

A null pointer dereference vulnerability has been identified in the Btrfs file system implementation of the Linux kernel. This issue arises in the btrfs_search_slot() function, where a sanity check for the Btrfs root is missing. The vulnerability can be triggered when the extent tree root is corrupted, leading to a null reference. As a result, when the scrub operation attempts to search the extent tree for information, it encounters a null pointer dereference, causing a crash.

Impact

Exploitation of this vulnerability leads to a null pointer dereference, causing a kernel crash.