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Linus Torvalds a64e715fc7 Allow ARG_MAX execve string space even with a small stack limit 
The new code that removed the limitation on the execve string size
(which was historically 32 pages) replaced it with a much softer limit
based on RLIMIT_STACK which is usually much larger than the traditional
limit.  See commit b6a2fea393 ("mm:
variable length argument support") for details.

However, if you have a small stack limit (perhaps because you need lots
of stacks in a threaded environment), the new heuristic of allowing up
to 1/4th of RLIMIT_STACK to be used for argument and environment strings
could actually be smaller than the old limit.

So just say that it's ok to have up to ARG_MAX strings regardless of the
value of RLIMIT_STACK, and check the rlimit only when going over that
traditional limit.

(Of course, if you actually have a *really* small stack limit, the whole
stack itself will be limited before you hit ARG_MAX, but that has always
been true and is clearly the right behaviour anyway).

Acked-by: Carlos O'Donell <carlos@codesourcery.com>
Cc: Michael Kerrisk <michael.kerrisk@googlemail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ollie Wild <aaw@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2008-03-03 10:12:14 -08:00
..
9p Convert ERR_PTR(PTR_ERR(p)) instances to ERR_CAST(p) 2008-02-07 08:42:26 -08:00
adfs mount options: fix adfs 2008-02-08 09:22:39 -08:00
affs mount options: fix affs 2008-02-08 09:22:39 -08:00
afs Use path_put() in a few places instead of {mnt,d}put() 2008-02-14 21:13:33 -08:00
autofs mount options: fix autofs 2008-02-08 09:22:40 -08:00
autofs4 Introduce path_put() 2008-02-14 21:13:33 -08:00
befs mount options: fix befs 2008-02-08 09:22:40 -08:00
bfs iget: stop BFS from using iget() and read_inode() 2008-02-07 08:42:27 -08:00
cifs Introduce path_put() 2008-02-14 21:13:33 -08:00
coda Introduce path_put() 2008-02-14 21:13:33 -08:00
configfs Introduce path_put() 2008-02-14 21:13:33 -08:00
cramfs fs/cramfs/inode.c: replace hardcoded value with preprocessor constant 2007-10-18 14:37:29 -07:00
debugfs libfs: allow error return from simple attributes 2008-02-08 09:22:34 -08:00
devpts mount options: fix devpts 2008-02-08 09:22:40 -08:00
dlm dlm: fix rcom_names message to self 2008-02-21 15:19:54 -06:00
ecryptfs Introduce path_put() 2008-02-14 21:13:33 -08:00
efs efs: move headers out of include/linux/ 2008-02-23 17:12:15 -08:00
exportfs exportfs: update documentation 2007-10-22 08:13:21 -07:00
ext2 mount options: fix ext2 2008-02-08 09:22:40 -08:00
ext3 Introduce path_put() 2008-02-14 21:13:33 -08:00
ext4 ext4: add missing ext4_journal_stop() 2008-02-25 15:37:42 -05:00
fat mount options: fix fat 2008-02-08 09:22:40 -08:00
freevxfs iget: stop FreeVXFS from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
fuse fuse: fix permission checking 2008-02-23 17:12:13 -08:00
gfs2 Introduce path_put() 2008-02-14 21:13:33 -08:00
hfs hfs: update comment to reflect actual init and exit routines 2008-02-06 10:41:05 -08:00
hfsplus fs/hfsplus/unicode.c: fix uninitialized var warning 2008-02-08 09:22:36 -08:00
hostfs uml: fix hostfs tv_usec calculations 2008-02-05 09:44:30 -08:00
hpfs mount options: fix hpfs 2008-02-08 09:22:40 -08:00
hppfs iget: stop HPPFS from using iget() and read_inode() 2008-02-07 08:42:29 -08:00
hugetlbfs hugetlb: allow sticky directory mount option 2008-02-05 09:44:14 -08:00
isofs mount options: fix isofs 2008-02-08 09:22:40 -08:00
jbd ext3 can fail badly when device stops accepting BIO_RW_BARRIER requests 2008-02-08 09:22:44 -08:00
jbd2 JBD2: Clear buffer_ordered flag for barried IO request on success 2008-02-10 01:09:32 -05:00
jffs2 Merge git://git.infradead.org/mtd-2.6 2008-02-07 10:20:31 -08:00
jfs BKL-removal: Implement a compat_ioctl handler for JFS 2008-02-07 13:45:29 -06:00
lockd Wrap buffers used for rpc debug printks into RPC_IFDEBUG 2008-02-21 18:42:29 -05:00
minix iget: stop the MINIX filesystem from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
msdos
…
ncpfs mount options: fix ncpfs 2008-02-08 09:22:40 -08:00
nfs Wrap buffers used for rpc debug printks into RPC_IFDEBUG 2008-02-21 18:42:29 -05:00
nfs_common
…
nfsd Wrap buffers used for rpc debug printks into RPC_IFDEBUG 2008-02-21 18:42:29 -05:00
nls sparse pointer use of zero as null 2007-10-18 14:37:31 -07:00
ntfs is_vmalloc_addr(): Check if an address is within the vmalloc boundaries 2008-02-05 09:44:14 -08:00
ocfs2 Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user 2008-02-05 09:44:13 -08:00
openpromfs iget: stop OPENPROMFS from using iget() and read_inode() 2008-02-07 08:42:29 -08:00
partitions Enhanced partition statistics: remove old partition statistics 2008-02-08 12:42:01 +01:00
proc latencytop: change /proc task_struct access method 2008-02-25 16:34:18 +01:00
qnx4 iget: stop QNX4 from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
ramfs Remove valueless definition of hard-selected RAMFS option 2007-10-17 08:42:56 -07:00
reiserfs Introduce path_put() 2008-02-14 21:13:33 -08:00
romfs iget: stop ROMFS from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
smbfs fs/smbfs/inode.c: fix warning message deprecating smbfs 2008-02-13 16:21:19 -08:00
sysfs sysfs: remove BUG_ON() from sysfs_remove_group() 2008-02-07 11:31:46 -08:00
sysv iget: stop the SYSV filesystem from using iget() and read_inode() 2008-02-07 08:42:29 -08:00
udf udf: fix udf_add_free_space 2008-02-13 16:21:20 -08:00
ufs ufs: fix parenthesisation in ufs_set_fs_state() 2008-02-23 17:12:13 -08:00
vfat Convert ERR_PTR(PTR_ERR(p)) instances to ERR_CAST(p) 2008-02-07 08:42:26 -08:00
xfs [XFS] If you mount an XFS filesystem with no mount options at all, then 2008-02-28 20:37:56 -08:00
Kconfig deprecate smbfs in favour of cifs 2008-02-05 14:37:15 -08:00
Kconfig.binfmt aout: suppress A.OUT library support if !CONFIG_ARCH_SUPPORTS_AOUT 2008-02-08 09:22:30 -08:00
Makefile x86: compat_binfmt_elf Kconfig 2008-01-30 13:31:46 +01:00
aio.c aio: negative offset should return -EINVAL 2008-02-08 09:22:33 -08:00
anon_inodes.c anon-inodes use open coded atomic_inc for the shared inode 2007-10-17 08:43:00 -07:00
attr.c VFS: make notify_change pass ATTR_KILL_S*ID to setattr operations 2007-10-18 14:37:22 -07:00
bad_inode.c iget: introduce a function to register iget failure 2008-02-07 08:42:26 -08:00
binfmt_aout.c aout: suppress A.OUT library support if !CONFIG_ARCH_SUPPORTS_AOUT 2008-02-08 09:22:30 -08:00
binfmt_elf.c Remove a.out interpreter support in ELF loader 2008-02-08 09:22:41 -08:00
binfmt_elf_fdpic.c pid namespaces: changes to show virtual ids to user 2007-10-19 11:53:40 -07:00
binfmt_em86.c Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
binfmt_flat.c FLAT binaries: drop BINFMT_FLAT bad header magic warning 2008-02-14 20:58:05 -08:00
binfmt_misc.c Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
binfmt_script.c Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
binfmt_som.c aout: remove unnecessary inclusions of {asm, linux}/a.out.h 2008-02-08 09:22:30 -08:00
bio.c fs/block_dev.c: remove #if 0'ed code 2008-02-19 10:04:00 +01:00
block_dev.c fs/block_dev.c: remove #if 0'ed code 2008-02-19 10:04:00 +01:00
buffer.c bufferhead: revert constructor removal 2008-02-05 09:44:14 -08:00
char_dev.c fs/char_dev.c: chrdev_open marked static and removed from fs.h 2008-02-08 09:22:42 -08:00
compat.c Merge branch 'linus_origin' into hotfixes 2008-02-15 13:36:30 -05:00
compat_binfmt_elf.c x86: compat_binfmt_elf 2008-01-30 13:31:46 +01:00
compat_ioctl.c d_path: Make d_path() use a struct path 2008-02-14 21:17:09 -08:00
dcache.c dentries: Extract common code to remove dentry from lru 2008-02-14 21:17:09 -08:00
dcookies.c d_path: Make d_path() use a struct path 2008-02-14 21:17:09 -08:00
direct-io.c Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user 2008-02-05 09:44:13 -08:00
dnotify.c
…
dquot.c Introduce path_put() 2008-02-14 21:13:33 -08:00
drop_caches.c
…
eventfd.c fs/eventfd.c should #include <linux/syscalls.h> 2008-02-06 10:41:03 -08:00
eventpoll.c lockdep: annotate epoll 2008-02-05 09:44:07 -08:00
exec.c Allow ARG_MAX execve string space even with a small stack limit 2008-03-03 10:12:14 -08:00
fcntl.c fs: remove fastcall, it is always empty 2008-02-08 09:22:31 -08:00
fifo.c
…
file.c get rid of NR_OPEN and introduce a sysctl_nr_open 2008-02-06 10:41:06 -08:00
file_table.c fs: remove fastcall, it is always empty 2008-02-08 09:22:31 -08:00
filesystems.c
…
fs-writeback.c writeback: speed up writeback of big dirty files 2008-02-05 09:44:19 -08:00
generic_acl.c
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inode.c iget: remove iget() and the read_inode() super op as being obsolete 2008-02-07 08:42:29 -08:00
inotify.c inotify: remove debug code 2008-02-06 10:41:07 -08:00
inotify_user.c Introduce path_put() 2008-02-14 21:13:33 -08:00
internal.h
…
ioctl.c fix up kerneldoc in fs/ioctl.c a little bit 2008-02-09 11:08:33 -08:00
ioprio.c cfq-iosched: relax IOPRIO_CLASS_IDLE restrictions 2008-01-28 11:38:15 +01:00
libfs.c Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user 2008-02-05 09:44:13 -08:00
locks.c Pidns: make full use of xxx_vnr() calls 2008-02-08 09:22:29 -08:00
mbcache.c fs: Fix to correct the mbcache entries counter 2007-10-25 15:18:29 -07:00
mpage.c Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user 2008-02-05 09:44:13 -08:00
namei.c Use struct path in fs_struct 2008-02-14 21:13:33 -08:00
namespace.c d_path: Make seq_path() use a struct path argument 2008-02-14 21:17:08 -08:00
nfsctl.c Introduce path_put() 2008-02-14 21:13:33 -08:00
no-block.c
…
open.c Make set_fs_{root,pwd} take a struct path 2008-02-14 21:13:33 -08:00
pipe.c kernel-doc: fix fs/pipe.c notation 2008-02-13 16:21:19 -08:00
pnode.c MNT_UNBINDABLE fix 2008-02-06 10:41:02 -08:00
pnode.h [PATCH] new helpers - collect_mounts() and release_collected_mounts() 2007-10-21 02:37:25 -04:00
posix_acl.c
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quota.c Convert ERR_PTR(PTR_ERR(p)) instances to ERR_CAST(p) 2008-02-07 08:42:26 -08:00
quota_v1.c
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quota_v2.c
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read_write.c remove the unused exports of sys_open/sys_read 2008-02-08 09:22:36 -08:00
read_write.h
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readdir.c Use mutex_lock_killable in vfs_readdir 2007-12-06 17:39:54 -05:00
select.c make sys_poll() wait at least timeout ms 2008-02-06 10:41:09 -08:00
seq_file.c d_path: Make d_path() use a struct path 2008-02-14 21:17:09 -08:00
signalfd.c fs/signalfd.c should #include <linux/syscalls.h> 2008-02-06 10:41:03 -08:00
splice.c splice: fix user pointer access in get_iovec_page_array() 2008-02-10 10:27:21 -08:00
stack.c
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stat.c Introduce path_put() 2008-02-14 21:13:33 -08:00
super.c quota: turn quotas off when remounting read-only 2008-02-08 09:22:44 -08:00
sync.c
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timerfd.c timerfd: new timerfd API 2008-02-05 09:44:07 -08:00
utimes.c Introduce path_put() 2008-02-14 21:13:33 -08:00
xattr.c Introduce path_put() 2008-02-14 21:13:33 -08:00
xattr_acl.c
…