Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Miklos Szeredi 2aa15890f3 mm: prevent concurrent unmap_mapping_range() on the same inode ... Michael Leun reported that running parallel opens on a fuse filesystem can trigger a "kernel BUG at mm/truncate.c:475" Gurudas Pai reported the same bug on NFS. The reason is, unmap_mapping_range() is not prepared for more than one concurrent invocation per inode. For example: thread1: going through a big range, stops in the middle of a vma and stores the restart address in vm_truncate_count. thread2: comes in with a small (e.g. single page) unmap request on the same vma, somewhere before restart_address, finds that the vma was already unmapped up to the restart address and happily returns without doing anything. Another scenario would be two big unmap requests, both having to restart the unmapping and each one setting vm_truncate_count to its own value. This could go on forever without any of them being able to finish. Truncate and hole punching already serialize with i_mutex. Other callers of unmap_mapping_range() do not, and it's difficult to get i_mutex protection for all callers. In particular ->d_revalidate(), which calls invalidate_inode_pages2_range() in fuse, may be called with or without i_mutex. This patch adds a new mutex to 'struct address_space' to prevent running multiple concurrent unmap_mapping_range() on the same mapping. [ We'll hopefully get rid of all this with the upcoming mm preemptibility series by Peter Zijlstra, the "mm: Remove i_mmap_mutex lockbreak" patch in particular. But that is for 2.6.39 ] Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Reported-by: Michael Leun <lkml20101129@newton.leun.net> Reported-by: Gurudas Pai <gurudas.pai@oracle.com> Tested-by: Gurudas Pai <gurudas.pai@oracle.com> Acked-by: Hugh Dickins <hughd@google.com> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2011-02-23 19:52:52 -08:00
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9p	switch 9p	2011-01-12 20:03:43 -05:00
adfs	switch adfs	2011-01-12 20:02:45 -05:00
affs	switch affs	2011-01-12 20:03:42 -05:00
afs	Unexport do_add_mount() and add in follow_automount(), not ->d_automount()	2011-01-15 20:07:48 -05:00
autofs4	autofs4: clean ->d_release() and autofs4_free_ino() up	2011-01-18 01:21:29 -05:00
befs	befs: don't pass huge structs by value	2011-01-13 08:03:15 -08:00
bfs	fs: icache RCU free inodes	2011-01-07 17:50:26 +11:00
btrfs	Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable	2011-02-15 08:00:35 -08:00
cachefiles
ceph	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client	2011-02-21 15:01:38 -08:00
cifs	[CIFS] update cifs version	2011-02-21 22:31:47 +00:00
coda	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2011-01-13 10:27:28 -08:00
configfs	configfs: change depends -> select SYSFS	2011-01-16 21:22:29 +00:00
cramfs	cramfs: generate unique inode number for better inode cache usage	2011-01-13 08:03:23 -08:00
debugfs	convert get_sb_single() users	2010-10-29 04:16:28 -04:00
devpts	convert get_sb_single() users	2010-10-29 04:16:28 -04:00
dlm	dlm: use single thread workqueues	2011-02-11 16:50:47 -06:00
ecryptfs	eCryptfs: Copy up lower inode attrs in getattr	2011-02-21 14:46:36 -06:00
efs	fs: icache RCU free inodes	2011-01-07 17:50:26 +11:00
exofs	Revert "exofs: Set i_mapping->backing_dev_info anyway"	2011-02-02 17:53:27 -08:00
exportfs	fs: dcache per-inode inode alias locking	2011-01-07 17:50:31 +11:00
ext2	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4	2011-01-11 14:37:31 -08:00
ext3	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6	2011-01-21 07:33:37 -08:00
ext4	ext4: serialize unaligned asynchronous DIO	2011-02-12 08:17:34 -05:00
fat	switch fat to ->s_d_op, close exportfs races there	2011-01-12 20:02:43 -05:00
freevxfs	fs: icache RCU free inodes	2011-01-07 17:50:26 +11:00
fscache	FS-Cache: Fix operation handling	2011-01-14 09:23:36 -08:00
fuse	switch fuse	2011-01-12 20:02:44 -05:00
gfs2	mm: prevent concurrent unmap_mapping_range() on the same inode	2011-02-23 19:52:52 -08:00
hfs	switch hfs	2011-01-12 20:02:45 -05:00
hfsplus	hfsplus: fix up a comparism in hfsplus_file_extend	2011-02-03 16:34:18 -07:00
hostfs	switch hostfs	2011-01-12 20:03:42 -05:00
hpfs	hpfs_setattr error case avoids unlock_kernel	2011-01-17 05:11:37 -05:00
hppfs	fs: icache RCU free inodes	2011-01-07 17:50:26 +11:00
hugetlbfs	fs: icache RCU free inodes	2011-01-07 17:50:26 +11:00
isofs	fix isofs d_op handling	2011-01-12 20:02:43 -05:00
jbd	fix comment typos concerning "consistent"	2010-12-10 16:04:28 +01:00
jbd2	jbd2: call __jbd2_log_start_commit with j_state_lock write locked	2011-02-12 08:18:24 -05:00
jffs2	Merge git://git.infradead.org/mtd-2.6	2011-01-17 11:15:30 -08:00
jfs	Merge branch 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block	2011-01-13 10:45:01 -08:00
lockd	NLM: Fix "kernel BUG at fs/lockd/host.c:417!" or ".../host.c:283!"	2011-01-25 15:24:47 -05:00
logfs	Merge branch 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block	2011-01-13 10:45:01 -08:00
minix	minixfs: kill dead code	2011-01-12 20:02:44 -05:00
ncpfs	move internal-only parts of ncpfs headers to fs/ncpfs	2011-01-12 20:03:43 -05:00
nfs	NFS: NFSv4 readdir loses entries	2011-01-28 13:41:35 -05:00
nfs_common	NFS: Prevent memory allocation failure in nfsacl_encode()	2011-01-25 15:24:47 -05:00
nfsd	nfsd: correctly handle return value from nfsd_map_name_to_*	2011-02-16 18:31:05 -05:00
nilfs2	mm: prevent concurrent unmap_mapping_range() on the same inode	2011-02-23 19:52:52 -08:00
nls
notify	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2011-01-13 10:05:56 -08:00
ntfs	NTFS: Fix invalid pointer dereference in ntfs_mft_record_alloc().	2011-01-31 12:58:11 +10:00
ocfs2	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6	2011-01-21 07:33:37 -08:00
omfs	new helper: mount_bdev()	2010-10-29 04:16:13 -04:00
openpromfs	fs: icache RCU free inodes	2011-01-07 17:50:26 +11:00
partitions	fs/partitions: Validate map_count in Mac partition tables	2011-02-17 17:50:51 -08:00
proc	s390: remove task_show_regs	2011-02-15 07:34:16 -08:00
qnx4	fs: icache RCU free inodes	2011-01-07 17:50:26 +11:00
quota	quota: Fix deadlock during path resolution	2011-01-12 19:14:55 +01:00
ramfs	convert get_sb_nodev() users	2010-10-29 04:16:31 -04:00
reiserfs	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6	2011-01-21 07:33:37 -08:00
romfs	fs: icache RCU free inodes	2011-01-07 17:50:26 +11:00
squashfs	squashfs: fix use of uninitialised variable in zlib & xz decompressors	2011-01-26 10:50:05 +10:00
sysfs	kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT	2011-01-20 17:02:05 -08:00
sysv	switch sysv	2011-01-12 20:02:44 -05:00
ubifs	fs: icache RCU free inodes	2011-01-07 17:50:26 +11:00
udf	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-udf-2.6	2011-01-11 14:45:52 -08:00
ufs	fs: icache RCU free inodes	2011-01-07 17:50:26 +11:00
xfs	xfs: check if device support discard in xfs_ioc_trim()	2011-02-22 15:08:44 -06:00
aio.c	aio: check return value of create_workqueue()	2011-01-17 05:12:44 -05:00
anon_inodes.c	sanitize vfsmount refcounting changes	2011-01-16 13:47:07 -05:00
attr.c
bad_inode.c	fs: provide rcu-walk aware permission i_ops	2011-01-07 17:50:29 +11:00
binfmt_aout.c
binfmt_elf.c	binfmt_elf: cleanups	2011-01-13 08:03:12 -08:00
binfmt_elf_fdpic.c
binfmt_em86.c
binfmt_flat.c
binfmt_misc.c	convert get_sb_single() users	2010-10-29 04:16:28 -04:00
binfmt_script.c
binfmt_som.c
bio-integrity.c	bio-integrity: mark kintegrityd_wq highpri and CPU intensive	2011-01-03 15:01:48 +01:00
bio.c	bio: take care not overflow page count when mapping/copying user data	2010-11-10 14:40:43 +01:00
block_dev.c	block: revert block_dev read-only check	2011-02-16 16:48:13 -08:00
buffer.c	fs: Use this_cpu_inc_return in buffer.c	2010-12-17 15:18:05 +01:00
char_dev.c	Merge branch 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block	2011-01-13 10:45:01 -08:00
compat.c	compat: copy missing fields in compat_statfs64 to user	2011-01-17 04:54:38 -05:00
compat_binfmt_elf.c
compat_ioctl.c	Merge branch 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6	2011-01-07 14:39:20 -08:00
dcache.c	fs: fix new dcache.c kernel-doc warnings	2011-01-22 20:32:38 -08:00
dcookies.c
direct-io.c	fs/direct-io.c: don't try to allocate more than BIO_MAX_PAGES in a bio	2011-01-20 17:02:05 -08:00
drop_caches.c
eventfd.c	Docbook: add fs/eventfd.c and fix typos in it	2011-02-21 15:07:04 -08:00
eventpoll.c	epoll: epoll_wait() should not use timespec_add_ns()	2011-02-02 16:03:18 -08:00
exec.c	vfs: sparse: add __FMODE_EXEC	2011-02-02 16:03:19 -08:00
fcntl.c	vfs: sparse: add __FMODE_EXEC	2011-02-02 16:03:19 -08:00
fifo.c
file.c
file_table.c	CRED: Fix kernel panic upon security_file_alloc() failure.	2011-02-04 10:40:29 -08:00
filesystems.c	fs: rcu-walk for path lookup	2011-01-07 17:50:27 +11:00
fs-writeback.c	fs/fs-writeback.c: fix sync_inodes_sb() return value kernel-doc	2011-01-13 17:32:48 -08:00
fs_struct.c	sanitize vfsmount refcounting changes	2011-01-16 13:47:07 -05:00
generic_acl.c	fs: provide simple rcu-walk generic_check_acl implementation	2011-01-07 17:50:29 +11:00
inode.c	mm: prevent concurrent unmap_mapping_range() on the same inode	2011-02-23 19:52:52 -08:00
internal.h	tidy up around finish_automount()	2011-01-17 01:47:59 -05:00
ioctl.c	fs: make block fiemap mapping length at least blocksize long	2011-02-02 16:03:20 -08:00
ioprio.c	ioprio: grab rcu_read_lock in sys_ioprio_{set,get}()	2010-11-15 10:23:31 +01:00
Kconfig	kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT	2011-01-20 17:02:05 -08:00
Kconfig.binfmt	coredump: default CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y	2010-10-27 18:03:12 -07:00
libfs.c	pass default dentry_operations to mount_pseudo()	2011-01-12 20:03:43 -05:00
locks.c	Merge branch 'for-2.6.38' of git://linux-nfs.org/~bfields/linux	2011-01-14 13:17:26 -08:00
Makefile	Merge 'staging-next' to Linus's tree	2010-10-28 09:44:56 -07:00
mbcache.c	ext2: Resolve 'dereferencing pointer to incomplete type' when enabling EXT2_XATTR_DEBUG	2011-01-10 19:04:08 +01:00
mpage.c	fs/mpage.c: consolidate code	2011-01-13 17:32:32 -08:00
namei.c	vfs: fix BUG_ON() in fs/namei.c:1461	2011-02-16 08:56:55 -08:00
namespace.c	tidy up around finish_automount()	2011-01-17 01:47:59 -05:00
nfsctl.c
no-block.c
open.c	Fix possible filp_cachep memory corruption	2011-02-11 15:53:38 -08:00
pipe.c	Fix broken "pipe: use event aware wakeups" optimization	2011-01-20 16:21:59 -08:00
pnode.c	fs: scale mntget/mntput	2011-01-07 17:50:33 +11:00
pnode.h
posix_acl.c	NFS: Prevent memory allocation failure in nfsacl_encode()	2011-01-25 15:24:47 -05:00
read_write.c	fix signedness mess in rw_verify_area() on 64bit architectures	2011-01-12 20:06:58 -05:00
read_write.h
readdir.c
select.c	fs/select.c: fix information leak to userspace	2011-01-13 08:03:12 -08:00
seq_file.c	fs: take dcache_lock inside __d_path	2010-10-25 21:26:12 -04:00
signalfd.c	Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6	2010-10-26 10:13:10 -07:00
splice.c	Merge branch 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block	2011-01-13 10:45:01 -08:00
stack.c
stat.c	Add an AT_NO_AUTOMOUNT flag to suppress terminal automount	2011-01-15 20:07:33 -05:00
statfs.c
super.c	vfs: call rcu_barrier after ->kill_sb()	2011-02-11 16:12:19 -08:00
sync.c
timerfd.c
utimes.c
xattr.c
xattr_acl.c