freebsd-nq/sys/fs
Konstantin Belousov d5b078163e null_bypass(): prevent loosing the only reference to the lower vnode
The upper vnode reference to the lower vnode is the only reference that
keeps our pointer to the lower vnode alive. If lower vnode is relocked
during the VOP call, upper vnode might become unlocked and reclaimed,
which invalidates our reference.

Add a transient vhold around VOP call.

Reported and tested by:	pho
Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D31310
2021-07-27 19:58:47 +03:00
..
autofs Ensure that dirent's d_off field is initialized 2021-01-03 11:50:31 -05:00
cd9660 Move mnt_maxsymlinklen into appropriate fs mount data structures 2021-05-22 15:16:09 +03:00
cuse
deadfs vn_open(): If the vnode is reclaimed during open(2), do not return error. 2021-02-12 03:02:20 +02:00
devfs devfs: Avoid comparison with an uninitialized var in devfs_fp_check() 2021-05-03 13:24:30 -04:00
ext2fs ext2: add missing uio_td initialization to ext2_htree_append_block 2021-05-30 17:19:31 +00:00
fdescfs fdescfs: add an option to return underlying file vnode on lookup 2021-06-04 03:30:12 +03:00
fifofs fifo: Explicitly initialize generation numbers when opening 2021-07-13 17:45:49 -04:00
fuse fusefs: correctly set lock owner during FUSE_SETLK 2021-06-25 20:40:08 -06:00
mntfs
msdosfs Fix makefs bootstrap after d485c77f20 2021-02-22 17:55:45 +00:00
nfs nfsd: Add sysctl to set maximum I/O size up to 1Mbyte 2021-07-16 15:01:03 -07:00
nfsclient nfscl: Send stateid.seqid of 0 for NFSv4.1/4.2 mounts 2021-07-19 17:35:39 -07:00
nfsserver nfsd: Add sysctl to set maximum I/O size up to 1Mbyte 2021-07-16 15:01:03 -07:00
nullfs null_bypass(): prevent loosing the only reference to the lower vnode 2021-07-27 19:58:47 +03:00
procfs procfs_map: switch to use vm_object_kvme_type 2021-05-13 20:10:35 +03:00
pseudofs pseudofs: use vget_prep + vget_finish instead of vget + the interlock 2021-05-19 17:58:42 +00:00
smbfs VFS_QUOTACTL(9): allow implementation to indicate busy state changes 2021-05-30 14:53:47 -07:00
tmpfs tmpfs: save on relocking the allnode lock in tmpfs_free_node_locked 2021-05-31 23:21:15 +00:00
udf Make MAXPHYS tunable. Bump MAXPHYS to 1M. 2020-11-28 12:12:51 +00:00
unionfs Allow stacked filesystems to be recursively unmounted 2021-07-24 12:52:00 -07:00