PT-2024-14721 · Linux+2 · Linux Kernel+2
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.2.0-rc3-syzkaller-00376-g7c6984405241
Description
The issue is related to a deadlock that can occur when using the btrfs file system. Specifically, it happens when the fiemap code triggers a fault while accessing the user space buffer with
fiemap fill next extent(), and there is a concurrent fsync on the file. The deadlock occurs because both fsync and btrfs page mkwrite() take the inode's i mmap lock semaphore. This problem was reported by syzbot and can cause a task to become blocked for an extended period.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Improper Locking
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Weakness Enumeration
Related Identifiers
Affected Products
Debian
Linux Kernel
Suse