Linus Torvalds d7824370e2 mm: fix up some user-visible effects of the stack guard page ... This commit makes the stack guard page somewhat less visible to user space. It does this by: - not showing the guard page in /proc/<pid>/maps It looks like lvm-tools will actually read /proc/self/maps to figure out where all its mappings are, and effectively do a specialized "mlockall()" in user space. By not showing the guard page as part of the mapping (by just adding PAGE_SIZE to the start for grows-up pages), lvm-tools ends up not being aware of it. - by also teaching the _real_ mlock() functionality not to try to lock the guard page. That would just expand the mapping down to create a new guard page, so there really is no point in trying to lock it in place. It would perhaps be nice to show the guard page specially in /proc/<pid>/maps (or at least mark grow-down segments some way), but let's not open ourselves up to more breakage by user space from programs that depends on the exact deails of the 'maps' file. Special thanks to Henrique de Moraes Holschuh for diving into lvm-tools source code to see what was going on with the whole new warning. Reported-and-tested-by: François Valenduc <francois.valenduc@tvcablenet.be Reported-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2010-08-15 11:35:52 -07:00
..
9p	v9fs: fixup for inode_setattr being removed	2010-08-11 00:08:00 -04:00
adfs	check ATTR_SIZE contraints in inode_change_ok	2010-08-09 16:47:39 -04:00
affs	AFFS: wait for sb synchronization when needed	2010-08-09 16:48:51 -04:00
afs	Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6	2010-08-13 10:37:30 -07:00
autofs	autofs/autofs4: Move compat_ioctl handling into fs	2010-08-09 00:13:34 +02:00
autofs4	autofs4: remove unneeded null check in try_to_fill_dentry()	2010-08-11 08:59:06 -07:00
befs	fix typos concerning "initiali[zs]e"	2010-06-16 18:05:05 +02:00
bfs	BFS: clean up the superblock usage	2010-08-09 16:48:53 -04:00
btrfs	Merge branch 'for-2.6.36' of git://git.kernel.dk/linux-2.6-block	2010-08-10 15:22:42 -07:00
cachefiles	Add a dummy printk function for the maintenance of unused printks	2010-08-12 09:51:35 -07:00
ceph	ceph: generalize mon requests, add pool op support	2010-08-10 14:41:25 -07:00
cifs	cifs: update README to include details about 'fsc' option	2010-08-11 17:11:28 +00:00
coda	Merge branch 'for-2.6.36' of git://git.kernel.dk/linux-2.6-block	2010-08-10 15:22:42 -07:00
configfs	fix setattr error handling in sysfs, configfs	2010-06-04 17:16:29 -04:00
cramfs	simplify get_cramfs_inode()	2010-08-09 16:47:51 -04:00
debugfs
devpts
dlm	fs/dlm: Drop unnecessary null test	2010-08-05 14:23:45 -05:00
ecryptfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ecryptfs/ecryptfs-2.6	2010-08-10 12:14:39 -07:00
efs
exofs	Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd	2010-08-11 09:19:43 -07:00
exportfs
ext2	mbcache: Remove unused features	2010-08-09 16:48:45 -04:00
ext3	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2010-08-10 11:26:52 -07:00
ext4	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2010-08-10 11:26:52 -07:00
fat	covert fatfs to ->evict_inode()	2010-08-09 16:48:01 -04:00
freevxfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2010-08-10 11:26:52 -07:00
fscache	Add a dummy printk function for the maintenance of unused printks	2010-08-12 09:51:35 -07:00
fuse	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2010-08-10 11:26:52 -07:00
gfs2	Merge branch 'for-2.6.36' of git://git.kernel.dk/linux-2.6-block	2010-08-10 15:22:42 -07:00
hfs	convert remaining ->clear_inode() to ->evict_inode()	2010-08-09 16:48:37 -04:00
hfsplus	convert remaining ->clear_inode() to ->evict_inode()	2010-08-09 16:48:37 -04:00
hostfs	try to get rid of races in hostfs open()	2010-08-09 16:48:15 -04:00
hpfs	switch hpfs to ->evict_inode()	2010-08-09 16:48:17 -04:00
hppfs	switch hppfs to ->evict_inode()	2010-08-09 16:48:16 -04:00
hugetlbfs	new helper: end_writeback()	2010-08-09 16:47:49 -04:00
isofs	isofs: Fix lseek() to position beyond 4 GB	2010-08-11 00:29:47 -04:00
jbd	ext3: Fix set but unused variables	2010-07-21 16:01:47 +02:00
jbd2	ext4: clean up compiler warning in start_this_handle()	2010-08-09 17:28:38 -04:00
jffs2	Merge git://git.infradead.org/mtd-2.6	2010-08-10 11:49:21 -07:00
jfs	jfs: don't allow os2 xattr namespace overlap with others	2010-08-10 15:33:09 -07:00
lockd
logfs	logfs: kill BKL	2010-08-14 00:24:24 +02:00
minix	switch minix to ->evict_inode(), fix write_inode/delete_inode race	2010-08-09 16:47:53 -04:00
ncpfs	Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing	2010-08-10 13:58:28 -07:00
nfs	Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6	2010-08-13 10:37:30 -07:00
nfs_common
nfsd	Merge branch 'for-linus' of git://git.infradead.org/users/eparis/notify	2010-08-10 11:39:13 -07:00
nilfs2	Merge branch 'for-2.6.36' of git://git.kernel.dk/linux-2.6-block	2010-08-10 15:22:42 -07:00
nls
notify	Revert "fsnotify: store struct file not struct path"	2010-08-12 14:23:04 -07:00
ntfs	convert remaining ->clear_inode() to ->evict_inode()	2010-08-09 16:48:37 -04:00
ocfs2	Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2	2010-08-13 10:43:50 -07:00
omfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bcopeland/omfs	2010-08-10 11:47:36 -07:00
openpromfs
partitions	[S390] partitions: fix build error in ibm partition detection code	2010-08-13 10:06:55 +02:00
proc	mm: fix up some user-visible effects of the stack guard page	2010-08-15 11:35:52 -07:00
qnx4	get rid of cont_write_begin_newtrunc	2010-08-09 16:47:31 -04:00
quota	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2010-08-10 11:26:52 -07:00
ramfs	check ATTR_SIZE contraints in inode_change_ok	2010-08-09 16:47:39 -04:00
reiserfs	reiserfs: remove unused local `wait'	2010-08-11 08:59:12 -07:00
romfs
smbfs	switch smbfs to evict_inode()	2010-08-09 16:48:00 -04:00
squashfs	Squashfs: fix checkpatch.pl warnings	2010-08-08 22:29:33 +00:00
sysfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2010-08-10 11:26:52 -07:00
sysv	fs/sysv/super.c: add support for non-PDP11 v7 filesystems	2010-08-11 08:59:23 -07:00
ubifs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2010-08-10 11:26:52 -07:00
udf	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2010-08-10 11:26:52 -07:00
ufs	switch ufs to ->evict_inode()	2010-08-09 16:48:02 -04:00
xfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2010-08-10 11:26:52 -07:00
aio.c	aio: fix wrong subsystem comments	2010-08-05 13:21:23 -07:00
anon_inodes.c	Revert "anon_inode: set S_IFREG on the anon_inode"	2010-05-27 22:03:05 -04:00
attr.c	check ATTR_SIZE contraints in inode_change_ok	2010-08-09 16:47:39 -04:00
bad_inode.c	bkl: Remove locked .ioctl file operation	2010-08-14 00:24:24 +02:00
binfmt_aout.c
binfmt_elf_fdpic.c	binfmt_elf_fdpic: Fix clear_user() error handling	2010-06-01 08:11:06 -07:00
binfmt_elf.c
binfmt_em86.c
binfmt_flat.c	flat: tweak default stack alignment	2010-06-29 15:29:31 -07:00
binfmt_misc.c	convert remaining ->clear_inode() to ->evict_inode()	2010-08-09 16:48:37 -04:00
binfmt_script.c
binfmt_som.c
bio-integrity.c
bio.c	block: unify flags for struct bio and struct request	2010-08-07 18:20:39 +02:00
block_dev.c	blkdev: cgroup whitelist permission fix	2010-08-11 08:59:18 -07:00
buffer.c	get rid of block_write_begin_newtrunc	2010-08-09 16:47:33 -04:00
char_dev.c	Fix init ordering of /dev/console vs callers of modprobe	2010-08-06 09:17:02 -07:00
compat_binfmt_elf.c
compat_ioctl.c	bkl: Remove locked .ioctl file operation	2010-08-14 00:24:24 +02:00
compat.c	Mark arguments to certain syscalls as being const	2010-08-13 16:53:13 -07:00
dcache.c	fs/dcache: fix function param name in kernel-doc	2010-08-14 16:21:00 -07:00
dcookies.c
direct-io.c	sort out blockdev_direct_IO variants	2010-08-09 16:47:29 -04:00
drop_caches.c	simplify checks for I_CLEAR/I_FREEING	2010-08-09 16:47:44 -04:00
eventfd.c
eventpoll.c
exec.c	Merge branch 'for-linus' of git://git.infradead.org/users/eparis/notify	2010-08-10 11:39:13 -07:00
fcntl.c	vfs: O_* bit numbers uniqueness check	2010-08-11 08:59:02 -07:00
fifo.c
file_table.c	Revert "fsnotify: store struct file not struct path"	2010-08-12 14:23:04 -07:00
file.c	vfs: use kmalloc() to allocate fdmem if possible	2010-08-11 08:59:02 -07:00
filesystems.c
fs_struct.c	vfs: add helpers to get root and pwd	2010-08-11 00:28:20 -04:00
fs-writeback.c	mm: fix writeback_in_progress()	2010-08-12 08:43:30 -07:00
generic_acl.c
inode.c	Merge branch 'for-linus' of git://git.infradead.org/users/eparis/notify	2010-08-10 11:39:13 -07:00
internal.h
ioctl.c	bkl: Remove locked .ioctl file operation	2010-08-14 00:24:24 +02:00
ioprio.c
Kconfig	fs/Kconfig: Fix typo Userpace -> Userspace	2010-07-20 17:30:22 +02:00
Kconfig.binfmt
libfs.c	check ATTR_SIZE contraints in inode_change_ok	2010-08-09 16:47:39 -04:00
locks.c
Makefile
mbcache.c	mbcache: fix shrinker function return value	2010-08-09 16:48:47 -04:00
mpage.c
namei.c	vfs: add helpers to get root and pwd	2010-08-11 00:28:20 -04:00
namespace.c	vfs: remove unused MNT_STRICTATIME	2010-08-11 00:29:47 -04:00
nfsctl.c
no-block.c
open.c	vfs: clarify that nonseekable_open() will never fail	2010-08-11 08:59:02 -07:00
pipe.c	pipe: fix check in "set size" fcntl	2010-06-10 19:08:34 +02:00
pnode.c
pnode.h
posix_acl.c
read_write.c	fsnotify: pass a file instead of an inode to open, read, and write	2010-07-28 09:58:32 -04:00
read_write.h
readdir.c	vfs: fix warning: 'dirent' is used uninitialized in this function	2010-08-09 20:45:05 -07:00
select.c
seq_file.c
signalfd.c	signalfd: fill in ssi_int for posix timers and message queues	2010-08-11 08:59:20 -07:00
splice.c	splice: fix misuse of SPLICE_F_NONBLOCK	2010-08-07 18:52:56 +02:00
stack.c
stat.c	Mark arguments to certain syscalls as being const	2010-08-13 16:53:13 -07:00
statfs.c	add f_flags to struct statfs(64)	2010-08-09 16:48:44 -04:00
super.c	no need for list_for_each_entry_safe()/resetting with superblock list	2010-08-09 16:49:02 -04:00
sync.c	get rid of file_fsync()	2010-08-09 16:47:43 -04:00
timerfd.c
utimes.c	Mark arguments to certain syscalls as being const	2010-08-13 16:53:13 -07:00
xattr_acl.c
xattr.c