Tony Battersby a68e61e8ff shm: fix shmctl(SHM_INFO) lockup with !CONFIG_SHMEM ... shm_get_stat() assumes that the inode is a "struct shmem_inode_info", which is incorrect for !CONFIG_SHMEM (see fs/ramfs/inode.c: ramfs_get_inode() vs. mm/shmem.c: shmem_get_inode()). This bad assumption can cause shmctl(SHM_INFO) to lockup when shm_get_stat() tries to spin_lock(&info->lock). Users of !CONFIG_SHMEM may encounter this lockup simply by invoking the 'ipcs' command. Reported by Jiri Olsa back in February 2008: http://lkml.org/lkml/2008/2/29/74 Signed-off-by: Tony Battersby <tonyb@cybernetics.com> Cc: Jiri Kosina <jkosina@suse.cz> Reported-by: Jiri Olsa <olsajiri@gmail.com> Cc: Hugh Dickins <hugh@veritas.com> Cc: <stable@kernel.org> [2.6.everything] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2009-02-05 12:56:47 -08:00
..
compat_mq.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
compat.c	fix logic error in ipc compat semctl()	2007-07-06 10:23:43 -07:00
ipc_sysctl.c	ipc/ipc_sysctl.c: move the definition of ipc_auto_callback()	2009-01-06 15:59:29 -08:00
ipcns_notifier.c	ipc: do not use a negative value to re-enable msgmni automatic recomputing	2008-07-25 10:53:42 -07:00
Makefile	ipc: recompute msgmni on ipc namespace creation/removal	2008-04-29 08:06:12 -07:00
mqueue.c	[CVE-2009-0029] System call wrappers part 26	2009-01-14 14:15:29 +01:00
msg.c	[CVE-2009-0029] System call wrappers part 24	2009-01-14 14:15:28 +01:00
msgutil.c	[PATCH] getting rid of all casts of k[cmz]alloc() calls	2006-12-13 09:05:58 -08:00
namespace.c	ipc: recompute msgmni on ipc namespace creation/removal	2008-04-29 08:06:12 -07:00
sem.c	[CVE-2009-0029] System call wrappers part 25	2009-01-14 14:15:28 +01:00
shm.c	shm: fix shmctl(SHM_INFO) lockup with !CONFIG_SHMEM	2009-02-05 12:56:47 -08:00
util.c	sanitize audit_ipc_set_perm()	2009-01-04 15:14:40 -05:00
util.h	ipc: get rid of ipc_lock_down()	2008-07-25 10:53:42 -07:00