David Sterba 0c4e538bcc btrfs: mask out gfp flags in releasepage ... btree_releasepage is a callback and can be passed unknown gfp flags and then they may end up in kmem_cache_alloc called from alloc_extent_state, slab allocator will BUG_ON when there is HIGHMEM or DMA32 flag set. This may happen when btrfs is mounted from a loop device, which masks out __GFP_IO flag. The check in try_release_extent_state 3399 if ((mask & GFP_NOFS) == GFP_NOFS) 3400 mask = GFP_NOFS; will not work and passes unfiltered flags further resulting in crash at mm/slab.c:2963 [<000000000024ae4c>] cache_alloc_refill+0x3b4/0x5c8 [<000000000024c810>] kmem_cache_alloc+0x204/0x294 [<00000000001fd3c2>] mempool_alloc+0x52/0x170 [<000003c000ced0b0>] alloc_extent_state+0x40/0xd4 [btrfs] [<000003c000cee5ae>] __clear_extent_bit+0x38a/0x4cc [btrfs] [<000003c000cee78c>] try_release_extent_state+0x9c/0xd4 [btrfs] [<000003c000cc4c66>] btree_releasepage+0x7e/0xd0 [btrfs] [<0000000000210d84>] shrink_page_list+0x6a0/0x724 [<0000000000211394>] shrink_inactive_list+0x230/0x578 [<0000000000211bb8>] shrink_list+0x6c/0x120 [<0000000000211e4e>] shrink_zone+0x1e2/0x228 [<0000000000211f24>] shrink_zones+0x90/0x254 [<0000000000213410>] do_try_to_free_pages+0xac/0x420 [<0000000000213ae0>] try_to_free_pages+0x13c/0x1b0 [<0000000000204e6c>] __alloc_pages_nodemask+0x5b4/0x9a8 [<00000000001fb04a>] grab_cache_page_write_begin+0x7e/0xe8 Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <chris.mason@oracle.com>		2012-01-26 15:01:12 -05:00
..
acl.c	Btrfs: fix return value of btrfs_get_acl()	2011-10-20 18:10:47 +02:00
async-thread.c	Btrfs: fix worker lock misuse in find_worker	2011-12-23 07:53:00 -05:00
async-thread.h	Btrfs: fix num_workers_starting bug and other bugs in async thread	2011-12-15 11:04:21 -05:00
backref.c	Btrfs: fix uninit warning in backref.c	2012-01-26 15:01:11 -05:00
backref.h	Btrfs: added btrfs_find_all_roots()	2012-01-04 16:26:38 +01:00
btrfs_inode.h	Btrfs: add a delalloc mutex to inodes for delalloc reservations	2012-01-16 15:29:43 -05:00
check-integrity.c	Btrfs: fix warning for 32-bit build of fs/btrfs/check-integrity.c	2012-01-26 15:01:11 -05:00
check-integrity.h	Btrfs: add optional integrity check code	2011-12-21 19:14:09 +01:00
compat.h	Btrfs: drop remaining LINUX_KERNEL_VERSION checks and compat code	2009-01-06 09:38:55 -05:00
compression.c	btrfs: separate superblock items out of fs_info	2011-11-06 03:04:01 -05:00
compression.h	btrfs: rename variables clashing with global function names	2011-05-02 13:57:19 +02:00
ctree.c	Btrfs: mark delayed refs as for cow	2011-12-22 16:22:27 +01:00
ctree.h	Merge branch 'integrity-check-patch-v2' of git://btrfs.giantdisaster.de/git/btrfs into integration	2012-01-16 15:27:58 -05:00
delayed-inode.c	Btrfs: space leak tracepoints	2012-01-16 15:29:43 -05:00
delayed-inode.h	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
delayed-ref.c	Btrfs: add waitqueue instead of doing busy waiting for more delayed refs	2012-01-04 16:12:48 +01:00
delayed-ref.h	Btrfs: add waitqueue instead of doing busy waiting for more delayed refs	2012-01-04 16:12:48 +01:00
dir-item.c	Btrfs: remove redundant code for dir item lookup	2011-08-01 14:30:48 -04:00
disk-io.c	btrfs: mask out gfp flags in releasepage	2012-01-26 15:01:12 -05:00
disk-io.h	Merge branch 'for-chris' of git://github.com/sensille/linux into integration	2011-11-06 03:05:08 -05:00
export.c	Merge branch 'ino-alloc' of git://repo.or.cz/linux-btrfs-devel into inode_numbers	2011-05-21 09:27:38 -04:00
export.h
extent_io.c	Btrfs: Check for NULL page in extent_range_uptodate	2012-01-26 15:01:11 -05:00
extent_io.h	Btrfs: add nested locking mode for paths	2012-01-04 16:12:29 +01:00
extent_map.c	Btrfs: clean up code for merging extent maps	2011-08-01 14:30:50 -04:00
extent_map.h	btrfs: drop gfp parameter from alloc_extent_map	2011-05-02 13:57:21 +02:00
extent-tree.c	Btrfs: fix enospc error caused by wrong checks of the chunk	2012-01-26 15:01:12 -05:00
file-item.c	btrfs: separate superblock items out of fs_info	2011-11-06 03:04:01 -05:00
file.c	Btrfs: don't call btrfs_throttle in file write	2012-01-16 15:28:55 -05:00
free-space-cache.c	Btrfs: use cluster->window_start when allocating from a cluster bitmap	2012-01-26 15:01:11 -05:00
free-space-cache.h	btrfs: remove all unused functions	2011-05-06 12:34:03 +02:00
hash.h	Btrfs: remove crc32c.h and use libcrc32c directly.	2009-06-10 11:29:53 -04:00
inode-item.c	Btrfs: BUG_ON is deleted from the caller of btrfs_truncate_item & btrfs_extend_item	2011-05-23 13:24:39 -04:00
inode-map.c	Btrfs: space leak tracepoints	2012-01-16 15:29:43 -05:00
inode-map.h	Btrfs: Support reading/writing on disk free ino cache	2011-04-25 16:46:11 +08:00
inode.c	Btrfs: add a delalloc mutex to inodes for delalloc reservations	2012-01-16 15:29:43 -05:00
ioctl.c	Btrfs: do not defrag a file partially	2012-01-26 15:01:12 -05:00
ioctl.h	Btrfs: add balance progress reporting	2012-01-16 22:04:49 +02:00
Kconfig	Btrfs: add config option to enable btrfs integrity check	2011-12-21 19:14:16 +01:00
locking.c	Btrfs: add nested locking mode for paths	2012-01-04 16:12:29 +01:00
locking.h	Btrfs: switch the btrfs tree locks to reader/writer	2011-07-27 12:46:46 -04:00
lzo.c	Btrfs: Avoid accessing unmapped kernel address	2011-02-16 15:37:58 -05:00
Makefile	Merge branch 'integrity-check-patch-v2' of git://btrfs.giantdisaster.de/git/btrfs into integration	2012-01-16 15:27:58 -05:00
ordered-data.c	Btrfs: add initial tracepoint support for btrfs	2011-03-28 05:37:33 -04:00
ordered-data.h	btrfs: Allow to add new compression algorithm	2010-12-22 23:15:45 +08:00
orphan.c	Btrfs: fixup return code for btrfs_del_orphan_item	2010-12-09 13:57:15 -05:00
print-tree.c	btrfs: fix oops on failure path	2011-10-20 18:10:50 +02:00
print-tree.h
reada.c	Btrfs: rename btrfs_bio multi -> bbio for consistency	2011-11-06 03:11:21 -05:00
relocation.c	Btrfs: add a delalloc mutex to inodes for delalloc reservations	2012-01-16 15:29:43 -05:00
root-tree.c	btrfs: make btrfs_set_root_node void	2011-08-01 14:30:44 -04:00
scrub.c	Merge branch 'integrity-check-patch-v2' of git://btrfs.giantdisaster.de/git/btrfs into integration	2012-01-16 15:27:58 -05:00
struct-funcs.c	Btrfs: stop using highmem for extent_buffers	2011-07-27 12:46:45 -04:00
super.c	Merge branch 'integrity-check-patch-v2' of git://btrfs.giantdisaster.de/git/btrfs into integration	2012-01-16 15:27:58 -05:00
sysfs.c	btrfs: Remove unused sysfs code	2011-06-17 14:54:18 -04:00
transaction.c	Btrfs: space leak tracepoints	2012-01-16 15:29:43 -05:00
transaction.h	Merge branch 'for-chris' of	2011-05-28 07:00:39 -04:00
tree-defrag.c	btrfs: drop unused parameter from btrfs_release_path	2011-05-02 13:57:22 +02:00
tree-log.c	btrfs: Fix busyloops in transaction waiting code	2012-01-26 15:01:11 -05:00
tree-log.h	btrfs: remove unused function prototypes	2011-05-04 14:01:26 +02:00
ulist.c	Btrfs: generic data structure to build unique lists	2011-12-22 16:22:24 +01:00
ulist.h	Btrfs: generic data structure to build unique lists	2011-12-22 16:22:24 +01:00
version.h
volumes.c	Btrfs: use larger system chunks	2012-01-16 15:38:24 -05:00
volumes.h	Merge branch 'for-chris' of git://repo.or.cz/linux-btrfs-devel into integration	2012-01-16 15:26:17 -05:00
xattr.c	Btrfs: do not use btrfs_end_transaction_throttle everywhere	2012-01-16 15:28:54 -05:00
xattr.h	fs/vfs/security: pass last path component to LSM on inode creation	2011-02-01 11:12:29 -05:00
zlib.c	zlib: slim down zlib_deflate() workspace when possible	2011-03-22 17:44:17 -07:00