Description
In the Linux kernel, the following vulnerability has been resolved: afs: Fix merge preference rule failure condition syzbot reported a lock held when returning to userspace[1]. This is because if argc is less than 0 and the function returns directly, the held inode lock is not released. Fix this by store the error in ret and jump to done to clean up instead of returning directly. [dh: Modified Lizhi Xu's original patch to make it honour the error code from afs_split_string()] [1] WARNING: lock held when returning to user space! 6.13.0-rc3-syzkaller-00209-g499551201b5f #0 Not tainted ------------------------------------------------ syz-executor133/5823 is leaving the kernel with locks still held! 1 lock held by syz-executor133/5823: #0: ffff888071cffc00 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] #0: ffff888071cffc00 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: afs_proc_addr_prefs_write+0x2bb/0x14e0 fs/afs/addr_prefs.c:388
Product status
f94f70d39cc2d54079ebae934862198516315db2 (git) before 22be1d90a6211c88dd093b25d1f3aa974d0d9f9d
f94f70d39cc2d54079ebae934862198516315db2 (git) before 17a4fde81d3a7478d97d15304a6d61094a10c2e3
6.8
Any version before 6.8
6.12.11 (semver)
6.13 (original_commit_for_fix)
References
git.kernel.org/...c/22be1d90a6211c88dd093b25d1f3aa974d0d9f9d
git.kernel.org/...c/17a4fde81d3a7478d97d15304a6d61094a10c2e3