The branch stable/13 has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=96251798e0100e46990d90e25917fb1dac6acce6
commit 96251798e0100e46990d90e25917fb1dac6acce6 Author: Konstantin Belousov <[email protected]> AuthorDate: 2022-06-20 15:54:44 +0000 Commit: Konstantin Belousov <[email protected]> CommitDate: 2022-07-06 12:33:30 +0000 vfs_op_exit(): assert that mnt_vfs_ops stays non-zero for unmount or suspend (cherry picked from commit 1e54362824f62a9d43585e94422d1d3d5f0268f9) --- sys/kern/vfs_mount.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sys/kern/vfs_mount.c b/sys/kern/vfs_mount.c index fa567361ae85..e14b1e882501 100644 --- a/sys/kern/vfs_mount.c +++ b/sys/kern/vfs_mount.c @@ -1605,6 +1605,10 @@ vfs_op_exit_locked(struct mount *mp) if (mp->mnt_vfs_ops <= 0) panic("%s: invalid vfs_ops count %d for mp %p\n", __func__, mp->mnt_vfs_ops, mp); + KASSERT(mp->mnt_vfs_ops > 1 || + (mp->mnt_kern_flag & (MNTK_UNMOUNT | MNTK_SUSPEND)) == 0, + ("%s: vfs_ops too low (%d) for mp %p in unmount or suspend", + __func__, mp->mnt_vfs_ops, mp)); mp->mnt_vfs_ops--; }
