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Tetsuo Handa 912193521b exec: do not call request_module() twice from search_binary_handler() 
Currently, search_binary_handler() tries to load binary loader module
using request_module() if a loader for the requested program is not yet
loaded.  But second attempt of request_module() does not affect the result
of search_binary_handler().

If request_module() triggered recursion, calling request_module() twice
causes 2 to the power of MAX_KMOD_CONCURRENT (= 50) repetitions.  It is
not an infinite loop but is sufficient for users to consider as a hang up.

Therefore, this patch changes not to call request_module() twice, making 1
to the power of MAX_KMOD_CONCURRENT repetitions in case of recursion.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: Richard Weinberger <richard@nod.at>
Tested-by: Richard Weinberger <richard@nod.at>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:49:44 -07:00
..
9p
p9: avoid unused variable warning
2011-07-25 23:43:53 -07:00
adfs
Fix common misspellings
2011-03-31 11:26:23 -03:00
affs
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
2011-07-20 20:47:59 -04:00
afs
AFS: Fix silly characters in a comment
2011-07-20 20:48:03 -04:00
autofs4
autofs4: bogus dentry_unhash() added in ->unlink()
2011-05-30 01:50:53 -04:00
befs
Fix common misspellings
2011-03-31 11:26:23 -03:00
bfs
bfs: remove unnecessary dentry_unhash on dir rename
2011-05-28 01:02:50 -04:00
btrfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback
2011-07-26 10:39:54 -07:00
cachefiles
kill useless checks for sb->s_op == NULL
2011-07-20 01:44:21 -04:00
ceph
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
2011-07-26 13:38:50 -07:00
cifs
Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6
2011-07-26 11:11:28 -07:00
coda
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
2011-07-20 20:47:59 -04:00
configfs
configfs: remove unnecessary dentry_unhash on rmdir, dir rename
2011-05-28 01:02:54 -04:00
cramfs
cramfs: get_cramfs_inode() returns ERR_PTR() on failure
2011-07-17 23:22:02 -04:00
debugfs
debugfs: move to new strtobool
2011-05-19 16:55:28 +09:30
devpts
fs/devpts/inode.c: correctly check d_alloc_name() return code in devpts_pty_new()
2011-03-22 17:44:17 -07:00
dlm
Merge branch 'for-3.1' of git://linux-nfs.org/~bfields/linux
2011-07-25 22:49:19 -07:00
ecryptfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2011-07-25 13:56:39 -07:00
efs
make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)
2011-07-20 01:44:26 -04:00
exofs
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
2011-07-20 20:47:59 -04:00
exportfs
vfs: Add open by file handle support
2011-03-15 02:21:44 -04:00
ext2
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6
2011-07-26 11:34:40 -07:00
ext3
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6
2011-07-26 11:34:40 -07:00
ext4
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback
2011-07-26 10:39:54 -07:00
fat
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
2011-07-20 20:47:59 -04:00
freevxfs
treewide: fix a few typos in comments
2011-05-10 10:16:21 +02:00
fscache
FS-Cache: Fix __fscache_uncache_all_inode_pages()'s outer loop
2011-07-21 10:59:16 -07:00
fuse
Merge branch 'for-3.1' of git://linux-nfs.org/~bfields/linux
2011-07-25 22:49:19 -07:00
gfs2
fs: take the ACL checks to common code
2011-07-25 14:30:23 -04:00
hfs
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
2011-07-20 20:47:59 -04:00
hfsplus
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
2011-07-22 19:02:39 -07:00
hostfs
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
2011-07-20 20:47:59 -04:00
hpfs
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
2011-07-20 20:47:59 -04:00
hppfs
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
2011-07-20 20:47:59 -04:00
hugetlbfs
Merge 'akpm' patch series
2011-07-25 21:00:19 -07:00
isofs
isofs: Remove global fs lock
2011-07-22 19:42:12 -04:00
jbd
jbd: Use WRITE_SYNC in journal checkpoint.
2011-06-28 00:06:41 +02:00
jbd2
jbd2: Fix oops in jbd2_journal_remove_journal_head()
2011-06-13 15:38:22 -04:00
jffs2
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2011-07-25 13:56:39 -07:00
jfs
fs: take the ACL checks to common code
2011-07-25 14:30:23 -04:00
lockd
locks: rename lock-manager ops
2011-07-20 20:23:19 -04:00
logfs
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
2011-07-20 20:47:59 -04:00
minix
minix_getattr(): don't bother with ->d_parent
2011-07-20 20:47:53 -04:00
ncpfs
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
2011-07-20 20:47:59 -04:00
nfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback
2011-07-26 10:39:54 -07:00
nfs_common
Fix common misspellings
2011-03-31 11:26:23 -03:00
nfsd
Merge branch 'for-3.1' of git://linux-nfs.org/~bfields/linux
2011-07-25 22:49:19 -07:00
nilfs2
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
2011-07-20 20:47:59 -04:00
nls
…
notify
Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6
2011-04-07 11:14:49 -07:00
ntfs
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
2011-07-20 20:47:59 -04:00
ocfs2
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2011-07-25 13:56:39 -07:00
omfs
Remove unneeded version.h includes from fs/
2011-06-24 08:34:22 -07:00
openpromfs
…
partitions
Merge branch 'for-linus' into for-3.1/core
2011-07-01 16:17:13 +02:00
proc
proc: fix a race in do_io_accounting()
2011-07-26 16:49:43 -07:00
pstore
pstore: fix pstore filesystem mount/remount issue
2011-05-16 11:05:00 -07:00
qnx4
…
quota
vmscan: change shrinker API by passing shrink_control struct
2011-05-25 08:39:26 -07:00
ramfs
ramfs: fix memleak on no-mmu arch
2011-04-14 16:06:56 -07:00
reiserfs
Merge 'akpm' patch series
2011-07-25 21:00:19 -07:00
romfs
romfs: fix romfs_get_unmapped_area() argument check
2011-06-27 18:00:12 -07:00
squashfs
Merge git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-linus
2011-07-25 22:50:35 -07:00
sysfs
->permission() sanitizing: don't pass flags to ->permission()
2011-07-20 01:43:24 -04:00
sysv
sysv: remove unnecessary dentry_unhash from rmdir, dir rename
2011-05-28 01:02:50 -04:00
ubifs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
2011-07-22 19:02:39 -07:00
udf
switch udf_ioctl() to inode_permission()
2011-07-20 01:43:07 -04:00
ufs
make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)
2011-07-20 01:44:26 -04:00
xfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2011-07-25 13:56:39 -07:00
aio.c
Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block
2011-03-24 10:16:26 -07:00
anon_inodes.c
VFS : mount lock scalability for internal mounts
2011-07-24 10:08:32 -04:00
attr.c
fs: move inode_dio_wait calls into ->setattr
2011-07-20 20:47:47 -04:00
bad_inode.c
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
2011-07-20 20:47:59 -04:00
binfmt_aout.c
…
binfmt_elf_fdpic.c
consolidate BINPRM_FLAGS_ENFORCE_NONDUMP handling
2011-07-20 01:43:10 -04:00
binfmt_elf.c
consolidate BINPRM_FLAGS_ENFORCE_NONDUMP handling
2011-07-20 01:43:10 -04:00
binfmt_em86.c
…
binfmt_flat.c
CRED: Fix load_flat_shared_library() to initialise bprm correctly
2011-05-03 10:10:51 +10:00
binfmt_misc.c
consolidate BINPRM_FLAGS_ENFORCE_NONDUMP handling
2011-07-20 01:43:10 -04:00
binfmt_script.c
…
binfmt_som.c
…
bio-integrity.c
block: Require subsystems to explicitly allocate bio_set integrity mempool
2011-03-17 11:11:05 +01:00
bio.c
block: improve the bio_add_page() and bio_add_pc_page() descriptions
2011-05-28 14:44:46 +02:00
block_dev.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback
2011-07-26 10:39:54 -07:00
buffer.c
vfs: Fix data corruption after failed write in __block_write_begin()
2011-06-16 11:44:46 -04:00
char_dev.c
…
compat_binfmt_elf.c
…
compat_ioctl.c
compat_ioctl: fix warning caused by qemu
2011-07-01 22:32:26 +02:00
compat.c
nfsd: Remove deprecated nfsctl system call and related code.
2011-07-15 18:58:42 -04:00
dcache.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
2011-07-22 19:02:39 -07:00
dcookies.c
oprofile, dcookies: Fix possible circular locking dependency
2011-05-31 16:33:35 +02:00
direct-io.c
fs: move inode_dio_done to the end_io handler
2011-07-20 20:47:50 -04:00
drop_caches.c
vmscan: change shrinker API by passing shrink_control struct
2011-05-25 08:39:26 -07:00
eventfd.c
…
eventpoll.c
Fix common misspellings
2011-03-31 11:26:23 -03:00
exec.c
exec: do not call request_module() twice from search_binary_handler()
2011-07-26 16:49:44 -07:00
fcntl.c
userns: rename is_owner_or_cap to inode_owner_or_capable
2011-03-23 19:47:13 -07:00
fhandle.c
fs/fhandle.c: add <linux/personality.h> for ia64
2011-04-14 16:06:56 -07:00
fifo.c
Filesystem: fifo: Fixed coding style issue.
2011-03-21 00:16:09 -04:00
file_table.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
2011-03-16 13:26:17 -07:00
file.c
vfs: avoid large kmalloc()s for the fdtable
2011-04-28 11:28:20 -07:00
filesystems.c
fs: synchronize_rcu when unregister_filesystem success not failure
2011-04-17 10:42:01 -07:00
fs_struct.c
…
fs-writeback.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback
2011-07-26 10:39:54 -07:00
generic_acl.c
fs: take the ACL checks to common code
2011-07-25 14:30:23 -04:00
inode.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback
2011-07-26 10:39:54 -07:00
internal.h
superblock: move pin_sb_for_writeback() to fs/super.c
2011-07-20 01:44:38 -04:00
ioctl.c
vfs: cleanup do_vfs_ioctl()
2011-03-21 00:16:08 -04:00
ioprio.c
…
Kconfig
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
2011-05-26 09:52:14 -07:00
Kconfig.binfmt
…
libfs.c
fix IN_DELETE_SELF on overwriting rename() on ramfs et.al.
2011-07-22 19:42:11 -04:00
locks.c
locks: rename lock-manager ops
2011-07-20 20:23:19 -04:00
Makefile
nfsd: Remove deprecated nfsctl system call and related code.
2011-07-15 18:58:42 -04:00
mbcache.c
vmscan: change shrinker API by passing shrink_control struct
2011-05-25 08:39:26 -07:00
mpage.c
mm/fs: add hooks to support cleancache
2011-05-26 10:01:43 -06:00
namei.c
vfs: fix check_acl compile error when CONFIG_FS_POSIX_ACL is not set
2011-07-25 22:47:03 -07:00
namespace.c
VFS : mount lock scalability for internal mounts
2011-07-24 10:08:32 -04:00
no-block.c
…
open.c
vfs: use ERR_CAST for err-ptr tossing in lookup_instantiate_filp
2011-07-22 19:42:13 -04:00
pipe.c
VFS : mount lock scalability for internal mounts
2011-07-24 10:08:32 -04:00
pnode.c
…
pnode.h
…
posix_acl.c
fs: take the ACL checks to common code
2011-07-25 14:30:23 -04:00
read_write.c
fs: add SEEK_HOLE and SEEK_DATA flags
2011-07-20 20:47:56 -04:00
read_write.h
…
readdir.c
…
select.c
select: remove unused MAX_SELECT_SECONDS
2011-03-21 00:16:08 -04:00
seq_file.c
…
signalfd.c
…
splice.c
tmpfs: clone shmem_file_splice_read()
2011-07-25 20:57:11 -07:00
stack.c
…
stat.c
readlinkat(), fchownat() and fstatat() with empty relative pathnames
2011-03-15 02:21:45 -04:00
statfs.c
…
super.c
Merge branch 'for-3.1/core' of git://git.kernel.dk/linux-block
2011-07-25 10:33:36 -07:00
sync.c
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
2011-07-20 20:47:59 -04:00
timerfd.c
timerfd: Fix wakeup of processes when timer is cancelled on clock change
2011-06-14 11:46:14 +02:00
utimes.c
userns: rename is_owner_or_cap to inode_owner_or_capable
2011-03-23 19:47:13 -07:00
xattr_acl.c
…
xattr.c
Cache xattr security drop check for write v2
2011-05-28 12:02:09 -04:00