Sasha Levin 08fa29d916 mm: fix NULL ptr deref when walking hugepages ... A missing validation of the value returned by find_vma() could cause a NULL ptr dereference when walking the pagetable. This is triggerable from usermode by a simple user by trying to read a page info out of /proc/pid/pagemap which doesn't exist. Introduced by commit 025c5b2451 ("thp: optimize away unnecessary page table locking"). Signed-off-by: Sasha Levin <levinsasha928@gmail.com> Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: David Rientjes <rientjes@google.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: <stable@vger.kernel.org> [3.4.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-05-29 16:22:18 -07:00
..
9p	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
adfs	switch open-coded instances of d_make_root() to new helper	2012-03-20 21:29:35 -04:00
affs	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
afs	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
autofs4	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
befs	switch open-coded instances of d_make_root() to new helper	2012-03-20 21:29:35 -04:00
bfs	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
btrfs	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
cachefiles	switch touch_atime to struct path	2012-03-20 21:29:41 -04:00
ceph	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client	2012-03-28 10:01:29 -07:00
cifs	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
coda	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
configfs	make configfs_pin_fs() return root dentry on success	2012-03-20 21:29:48 -04:00
cramfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-03-21 13:36:41 -07:00
debugfs	debugfs: Add support to print u32 array in debugfs	2012-04-17 00:18:36 -04:00
devpts	userns: Convert devpts to use kuid/kgid where appropriate	2012-05-15 14:59:26 -07:00
dlm	dlm: NULL dereference on failure in kmem_cache_create()	2012-05-15 10:39:28 -05:00
ecryptfs	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
efs	switch open-coded instances of d_make_root() to new helper	2012-03-20 21:29:35 -04:00
exofs	Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd	2012-05-28 13:10:41 -07:00
exportfs	…
ext2	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
ext3	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
ext4	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
fat	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
freevxfs	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
fscache	…
fuse	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
gfs2	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
hfs	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
hfsplus	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
hostfs	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
hpfs	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
hppfs	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
hugetlbfs	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
isofs	switch open-coded instances of d_make_root() to new helper	2012-03-20 21:29:35 -04:00
jbd	jbd: Write journal superblock with WRITE_FUA after checkpointing	2012-05-15 23:34:37 +02:00
jbd2	jbd2: use GFP_NOFS for blkdev_issue_flush	2012-04-23 21:43:41 -04:00
jffs2	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
jfs	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
lockd	lockd: fix the endianness bug	2012-04-13 13:50:52 -04:00
logfs	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
minix	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
ncpfs	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
nfs	NFS client updates for Linux 3.5	2012-05-29 10:43:51 -07:00
nfs_common	…
nfsd	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2012-05-23 17:42:39 -07:00
nilfs2	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
nls	NLS: raname "maxlen" to "maxout" in UTF conversion routines	2011-11-26 19:58:47 -08:00
notify	fs/notify/notification.c: make subsys_initcall function static	2012-03-23 16:58:31 -07:00
ntfs	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
ocfs2	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
omfs	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
openpromfs	switch open-coded instances of d_make_root() to new helper	2012-03-20 21:29:35 -04:00
proc	mm: fix NULL ptr deref when walking hugepages	2012-05-29 16:22:18 -07:00
pstore	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
qnx4	qnx4: new helper - try_extent()	2012-03-20 21:29:52 -04:00
qnx6	fs: initial qnx6fs addition	2012-03-20 21:29:38 -04:00
quota	quota: Get rid of nested I_MUTEX_QUOTA locking subclass	2012-05-15 23:34:39 +02:00
ramfs	tidy up after d_make_root() conversion	2012-03-20 21:29:37 -04:00
reiserfs	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
romfs	MTD merge for 3.4	2012-03-30 17:31:56 -07:00
squashfs	Add an extra mount time sanity check, plus some code cleanups and bug fixes.	2012-03-28 18:05:54 -07:00
sysfs	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
sysv	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
ubifs	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
udf	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
ufs	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
xfs	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
Kconfig	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-03-21 13:36:41 -07:00
Kconfig.binfmt	C6X: add support to build with BINFMT_ELF_FDPIC	2012-05-15 09:17:34 -04:00
Makefile	fs: initial qnx6fs addition	2012-03-20 21:29:38 -04:00
aio.c	vfs: make AIO use the proper rw_verify_area() area helpers	2012-05-21 16:06:20 -07:00
anon_inodes.c	anon_inodes: move allocation of anon_inode into ->mount()	2012-03-20 21:29:45 -04:00
attr.c	userns: Use uid_eq gid_eq helpers when comparing kuids and kgids in the vfs	2012-05-03 03:29:34 -07:00
bad_inode.c	fs: reduce the use of module.h wherever possible	2012-02-28 19:31:58 -05:00
binfmt_aout.c	VM: add "vm_mmap()" helper function	2012-04-20 17:29:13 -07:00
binfmt_elf.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2012-05-23 17:42:39 -07:00
binfmt_elf_fdpic.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2012-05-23 17:42:39 -07:00
binfmt_em86.c	__register_binfmt() made void	2012-03-20 21:29:46 -04:00
binfmt_flat.c	VM: add "vm_mmap()" helper function	2012-04-20 17:29:13 -07:00
binfmt_misc.c	vfs: Rename end_writeback() to clear_inode()	2012-05-06 13:43:41 +08:00
binfmt_script.c	__register_binfmt() made void	2012-03-20 21:29:46 -04:00
binfmt_som.c	VM: add "vm_mmap()" helper function	2012-04-20 17:29:13 -07:00
bio-integrity.c	fs: remove the second argument of k[un]map_atomic()	2012-03-20 21:48:21 +08:00
bio.c	bio allocation failure due to bio_get_nr_vecs()	2012-05-11 16:45:12 +02:00
block_dev.c	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
buffer.c	block: don't mark buffers beyond end of disk as mapped	2012-05-11 16:42:14 +02:00
char_dev.c	char_dev.c: fix up some whitespace errors	2011-12-13 11:18:17 -08:00
compat.c	userns: Convert stat to return values mapped from kuids and kgids	2012-05-15 14:08:35 -07:00
compat_binfmt_elf.c	…
compat_ioctl.c	The following text was taken from the original review request:	2012-03-24 10:24:31 -07:00
dcache.c	mm: add a low limit to alloc_large_system_hash	2012-05-24 00:28:21 -04:00
dcookies.c	fs: reduce the use of module.h wherever possible	2012-02-28 19:31:58 -05:00
direct-io.c	Restore direct_io / truncate locking API	2012-02-23 15:56:21 -08:00
drop_caches.c	…
eventfd.c	fs: reduce the use of module.h wherever possible	2012-02-28 19:31:58 -05:00
eventpoll.c	epoll: Fix user space breakage related to EPOLLWAKEUP	2012-05-22 20:57:06 +02:00
exec.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2012-05-23 17:42:39 -07:00
fcntl.c	userns: Use uid_eq gid_eq helpers when comparing kuids and kgids in the vfs	2012-05-03 03:29:34 -07:00
fhandle.c	vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb	2012-01-06 23:16:53 -05:00
fifo.c	…
file.c	Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-03-29 18:12:23 -07:00
file_table.c	vfs: drop_file_write_access() made static	2012-03-20 21:29:32 -04:00
filesystems.c	vfs: convert fs_supers to hlist	2012-01-03 22:52:39 -05:00
fs-writeback.c	writeback: Avoid iput() from flusher thread	2012-05-06 13:43:41 +08:00
fs_struct.c	The following text was taken from the original review request:	2012-03-24 10:24:31 -07:00
generic_acl.c	…
inode.c	avoid iput() from flusher thread	2012-05-28 09:54:45 -07:00
internal.h	vfs: protect remounting superblock read-only	2012-01-06 23:20:12 -05:00
ioctl.c	fs: reduce the use of module.h wherever possible	2012-02-28 19:31:58 -05:00
ioprio.c	userns: Use uid_eq gid_eq helpers when comparing kuids and kgids in the vfs	2012-05-03 03:29:34 -07:00
libfs.c	vfs: make it possible to access the dentry hash/len as one 64-bit entry	2012-05-10 19:54:35 -07:00
locks.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2012-05-23 17:42:39 -07:00
mbcache.c	…
mount.h	vfs: keep list of mounts for each superblock	2012-01-06 23:20:12 -05:00
mpage.c	fs: reduce the use of module.h wherever possible	2012-02-28 19:31:58 -05:00
namei.c	word-at-a-time: make the interfaces truly generic	2012-05-26 11:33:40 -07:00
namespace.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-01-08 13:21:22 -08:00
no-block.c	…
open.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2012-05-23 17:42:39 -07:00
pipe.c	pipes: add a "packetized pipe" mode for writing	2012-04-29 13:12:42 -07:00
pnode.c	vfs: switch pnode.h macros to struct mount *	2012-01-03 22:57:11 -05:00
pnode.h	vfs: switch pnode.h macros to struct mount *	2012-01-03 22:57:11 -05:00
posix_acl.c	fs: reduce the use of module.h wherever possible	2012-02-28 19:31:58 -05:00
proc_namespace.c	vfs: switch ->show_options() to struct dentry *	2012-01-06 23:19:54 -05:00
read_write.c	fs: reduce the use of module.h wherever possible	2012-02-28 19:31:58 -05:00
read_write.h	…
readdir.c	fs: reduce the use of module.h wherever possible	2012-02-28 19:31:58 -05:00
select.c	Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-03-29 18:12:23 -07:00
seq_file.c	The following text was taken from the original review request:	2012-03-24 10:24:31 -07:00
signalfd.c	epoll: ep_unregister_pollwait() can use the freed pwq->whead	2012-02-24 11:42:50 -08:00
splice.c	tcp: tcp_sendpages() should call tcp_push() once	2012-04-05 19:04:27 -04:00
stack.c	fs: reduce the use of module.h wherever possible	2012-02-28 19:31:58 -05:00
stat.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2012-05-23 17:42:39 -07:00
statfs.c	fs: reduce the use of module.h wherever possible	2012-02-28 19:31:58 -05:00
super.c	The following text was taken from the original review request:	2012-03-24 10:24:31 -07:00
sync.c	fs: reduce the use of module.h wherever possible	2012-02-28 19:31:58 -05:00
timerfd.c	…
utimes.c	…
xattr.c	fs/xattr.c:setxattr(): improve handling of allocation failures	2012-04-05 15:25:50 -07:00
xattr_acl.c	fs: reduce the use of module.h wherever possible	2012-02-28 19:31:58 -05:00