Ian Kent 7cbdb4a286 autofs: use dentry flags to block walks during expire ... Somewhere along the way the autofs expire operation has changed to hold a spin lock over expired dentry selection. The autofs indirect mount expired dentry selection is complicated and quite lengthy so it isn't appropriate to hold a spin lock over the operation. Commit 47be61845c ("fs/dcache.c: avoid soft-lockup in dput()") added a might_sleep() to dput() causing a WARN_ONCE() about this usage to be issued. But the spin lock doesn't need to be held over this check, the autofs dentry info. flags are enough to block walks into dentrys during the expire. I've left the direct mount expire as it is (for now) because it is much simpler and quicker than the indirect mount expire and adding spin lock release and re-aquires would do nothing more than add overhead. Fixes: 47be61845c ("fs/dcache.c: avoid soft-lockup in dput()") Link: http://lkml.kernel.org/r/20160912014017.1773.73060.stgit@pluto.themaw.net Signed-off-by: Ian Kent <raven@themaw.net> Reported-by: Takashi Iwai <tiwai@suse.de> Tested-by: Takashi Iwai <tiwai@suse.de> Cc: Takashi Iwai <tiwai@suse.de> Cc: NeilBrown <neilb@suse.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2016-09-19 15:36:17 -07:00
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9p	Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-08-07 10:01:14 -04:00
adfs	Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-08-07 10:01:14 -04:00
affs	get rid of 'parent' argument of ->d_compare()	2016-07-31 16:37:25 -04:00
afs	rxrpc: Fix races between skb free, ACK generation and replying	2016-08-06 00:08:40 -04:00
autofs4	autofs: use dentry flags to block walks during expire	2016-09-19 15:36:17 -07:00
befs	…
bfs	…
btrfs	Merge branch 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs	2016-09-09 12:52:31 -07:00
cachefiles	cachefiles: Fix race between inactivating and culling a cache object	2016-08-03 13:33:26 -04:00
ceph	ceph: do not modify fi->frag in need_reset_readdir()	2016-09-05 14:30:35 +02:00
cifs	Move check for prefix path to within cifs_get_root()	2016-09-09 23:58:07 -05:00
coda	…
configfs	configfs: don't set buffer_needs_fill to zero if show() returns error	2016-07-10 21:02:18 +09:00
cramfs	…
crypto	fscrypto: require write access to mount to set encryption policy	2016-09-10 01:18:57 -04:00
debugfs	Merge branch 'd_real' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs into work.misc	2016-06-30 23:34:49 -04:00
devpts	devpts: return NULL pts 'priv' entry for non-devpts nodes	2016-09-03 11:02:50 -07:00
dlm	dlm: fix malfunction of dlm_tool caused by debugfs changes	2016-08-26 13:22:14 -05:00
ecryptfs	ecryptfs: don't allow mmap when the lower fs doesn't support it	2016-07-08 10:35:28 -05:00
efivarfs	get rid of 'parent' argument of ->d_compare()	2016-07-31 16:37:25 -04:00
efs	…
exofs	block, fs, mm, drivers: use bio set/get op accessors	2016-06-07 13:41:38 -06:00
exportfs	…
ext2	Merge branch 'work.const-qstr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-08-06 09:49:02 -04:00
ext4	fscrypto: require write access to mount to set encryption policy	2016-09-10 01:18:57 -04:00
f2fs	fscrypto: require write access to mount to set encryption policy	2016-09-10 01:18:57 -04:00
fat	Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-08-07 10:01:14 -04:00
freevxfs	freevxfs: update Kconfig information	2016-06-13 10:20:39 +02:00
fscache	Merge branch 'd_real' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs into work.misc	2016-06-30 23:34:49 -04:00
fuse	fuse: direct-io: don't dirty ITER_BVEC pages	2016-08-24 18:17:04 +02:00
gfs2	fs: return EPERM on immutable inode	2016-08-07 10:03:31 -04:00
hfs	Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-08-07 10:01:14 -04:00
hfsplus	Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-08-07 10:01:14 -04:00
hostfs	hostfs: Freeing an ERR_PTR in hostfs_fill_sb_common()	2016-08-04 00:18:10 +02:00
hpfs	get rid of 'parent' argument of ->d_compare()	2016-07-31 16:37:25 -04:00
hugetlbfs	…
isofs	get rid of 'parent' argument of ->d_compare()	2016-07-31 16:37:25 -04:00
jbd2	The major change this cycle is deleting ext4's copy of the file system	2016-07-26 18:35:55 -07:00
jffs2	vfs: make the string hashes salt the hash	2016-06-10 20:21:46 -07:00
jfs	get rid of 'parent' argument of ->d_compare()	2016-07-31 16:37:25 -04:00
kernfs	kernfs: don't depend on d_find_any_alias() when generating notifications	2016-08-31 14:48:52 +02:00
lockd	Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-07-28 12:59:05 -07:00
logfs	Merge branch 'work.const-qstr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-08-06 09:49:02 -04:00
minix	…
ncpfs	get rid of 'parent' argument of ->d_compare()	2016-07-31 16:37:25 -04:00
nfs	NFSv4.1: Fix the CREATE_SESSION slot number accounting	2016-09-11 14:56:44 -04:00
nfs_common	…
nfsd	nfsd: don't return an unhashed lock stateid after taking mutex	2016-08-12 16:10:25 -04:00
nilfs2	nilfs2: move ioctl interface and disk layout to uapi separately	2016-08-02 19:35:21 -04:00
nls	…
notify	…
ntfs	Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-07-28 12:59:05 -07:00
ocfs2	ocfs2/dlm: fix race between convert and migration	2016-09-19 15:36:16 -07:00
omfs	…
openpromfs	…
orangefs	orangefs: Account for jiffies wraparound.	2016-08-02 15:39:13 -04:00
overlayfs	ovl: fix workdir creation	2016-09-05 13:55:20 +02:00
proc	Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm	2016-09-10 09:58:52 -07:00
pstore	ramoops: use persistent_ram_free() instead of kfree() for freeing prz	2016-08-05 11:21:46 -07:00
qnx4	…
qnx6	…
quota	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2016-07-29 15:54:19 -07:00
ramfs	…
reiserfs	reiserfs: fix "new_insert_key may be used uninitialized ..."	2016-08-02 19:35:22 -04:00
romfs	…
squashfs	fs: have ll_rw_block users pass in op and flags separately	2016-06-07 13:41:38 -06:00
sysfs	sysfs: correctly handle read offset on PREALLOC attrs	2016-08-31 15:14:44 +02:00
sysv	vfs: make the string hashes salt the hash	2016-06-10 20:21:46 -07:00
tracefs	…
ubifs	ubifs: Fix xattr generic handler usage	2016-08-23 23:02:52 +02:00
udf	Merge branch 'for-4.8/drivers' of git://git.kernel.dk/linux-block	2016-07-26 15:37:51 -07:00
ufs	Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-07-28 12:59:05 -07:00
xfs	xfs: track log done items directly in the deferred pending work item	2016-08-30 13:51:39 +10:00
Kconfig	Highlights:	2016-08-04 19:59:06 -04:00
Kconfig.binfmt	m68k: enable binfmt_flat on systems with an MMU	2016-07-28 13:29:13 +10:00
Makefile	fs: introduce iomap infrastructure	2016-06-21 09:23:11 +10:00
aio.c	aio: mark AIO pseudo-fs noexec	2016-09-15 15:49:28 -07:00
anon_inodes.c	…
attr.c	vfs: Don't modify inodes with a uid or gid unknown to the vfs	2016-07-05 15:06:46 -05:00
bad_inode.c	…
binfmt_aout.c	…
binfmt_elf.c	binfmt_elf: switch to new creds when switching to new mm	2016-08-31 09:13:56 -07:00
binfmt_elf_fdpic.c	elf_fdpic_transfer_args_to_stack(): make it generic	2016-07-25 16:51:49 +10:00
binfmt_em86.c	fs/binfmt_em86.c: fix incompatible pointer type	2016-08-02 19:35:15 -04:00
binfmt_flat.c	binfmt_flat: allow compressed flat binary format to work on MMU systems	2016-07-28 13:29:12 +10:00
binfmt_misc.c	binfmt_misc for-linus on 20160727	2016-08-07 10:13:14 -04:00
binfmt_script.c	…
block_dev.c	fs/block_dev: fix potential NULL ptr deref in freeze_bdev()	2016-08-25 08:38:26 -06:00
buffer.c	xfs: update for 4.8-rc1	2016-07-27 09:53:35 -07:00
char_dev.c	chardev: add missing line break in pr_warn	2016-07-14 16:21:53 +09:00
compat.c	…
compat_binfmt_elf.c	…
compat_ioctl.c	[media] cec: add compat32 ioctl support	2016-06-28 10:00:13 -03:00
coredump.c	coredump: fix dumping through pipes	2016-06-07 22:07:09 -04:00
dax.c	libnvdimm for 4.8	2016-07-28 17:38:16 -07:00
dcache.c	Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-08-07 10:01:14 -04:00
dcookies.c	…
direct-io.c	direct-io: use bio set/get op accessors	2016-06-07 13:41:38 -06:00
drop_caches.c	…
eventfd.c	…
eventpoll.c	…
exec.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu	2016-08-04 18:04:44 -04:00
fcntl.c	…
fhandle.c	…
file.c	…
file_table.c	…
filesystems.c	…
fs-writeback.c	mm, writeback: flush plugged IO in wakeup_flusher_threads()	2016-08-09 19:58:06 -06:00
fs_pin.c	…
fs_struct.c	…
inode.c	Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-08-07 10:01:14 -04:00
internal.h	binfmt_misc for-linus on 20160727	2016-08-07 10:13:14 -04:00
ioctl.c	vfs: cap dedupe request structure size at PAGE_SIZE	2016-09-15 13:29:52 -07:00
iomap.c	iomap: don't set FIEMAP_EXTENT_MERGED for extent based filesystems	2016-08-29 11:33:58 +10:00
libfs.c	lockless next_positive()	2016-06-20 17:11:29 -04:00
locks.c	locks: use file_inode()	2016-07-01 10:24:18 -04:00
mbcache.c	…
mount.h	…
mpage.c	block/mm: make bdev_ops->rw_page() take a bool for read/write	2016-08-07 14:41:02 -06:00
namei.c	fs: return EPERM on immutable inode	2016-08-07 10:03:31 -04:00
namespace.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2016-07-29 15:54:19 -07:00
no-block.c	…
nsfs.c	…
open.c	binfmt_misc for-linus on 20160727	2016-08-07 10:13:14 -04:00
pipe.c	mm: memcontrol: only mark charged pages with PageKmemcg	2016-08-09 10:14:10 -07:00
pnode.c	…
pnode.h	…
posix_acl.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2016-07-29 15:54:19 -07:00
proc_namespace.c	…
read_write.c	x86/syscalls: Add compat_sys_preadv64v2/compat_sys_pwritev64v2	2016-07-15 10:30:26 +02:00
readdir.c	…
select.c	…
seq_file.c	fs/seq_file: fix out-of-bounds read	2016-08-26 17:39:35 -07:00
signalfd.c	…
splice.c	…
stack.c	…
stat.c	…
statfs.c	…
super.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2016-07-29 15:54:19 -07:00
sync.c	…
timerfd.c	timerfd: Reject ALARM timerfds without CAP_WAKE_ALARM	2016-06-09 23:42:38 +02:00
userfaultfd.c	mm: introduce fault_env	2016-07-26 16:19:19 -07:00
utimes.c	fs: return EPERM on immutable inode	2016-08-07 10:03:31 -04:00
xattr.c	vfs: Don't modify inodes with a uid or gid unknown to the vfs	2016-07-05 15:06:46 -05:00