Paul Mackerras b4611abfa9 ext4: Fix crash due to getting bogus eh_depth value on big-endian systems ... Commit 1939dd84b3 ("ext4: cleanup ext4_ext_grow_indepth code") added a reference to ext4_extent_header.eh_depth, but forget to pass the value read through le16_to_cpu. The result is a crash on big-endian machines, such as this crash on a POWER7 server: attempt to access beyond end of device sda8: rw=0, want=776392648163376, limit=168558560 Unable to handle kernel paging request for data at address 0x6b6b6b6b6b6b6bcb Faulting instruction address: 0xc0000000001f5f38 cpu 0x14: Vector: 300 (Data Access) at [c000001bd1aaecf0] pc: c0000000001f5f38: .__brelse+0x18/0x60 lr: c0000000002e07a4: .ext4_ext_drop_refs+0x44/0x80 sp: c000001bd1aaef70 msr: 9000000000009032 dar: 6b6b6b6b6b6b6bcb dsisr: 40000000 current = 0xc000001bd15b8010 paca = 0xc00000000ffe4600 pid = 19911, comm = flush-8:0 enter ? for help [c000001bd1aaeff0] c0000000002e07a4 .ext4_ext_drop_refs+0x44/0x80 [c000001bd1aaf090] c0000000002e0c58 .ext4_ext_find_extent+0x408/0x4c0 [c000001bd1aaf180] c0000000002e145c .ext4_ext_insert_extent+0x2bc/0x14c0 [c000001bd1aaf2c0] c0000000002e3fb8 .ext4_ext_map_blocks+0x628/0x1710 [c000001bd1aaf420] c0000000002b2974 .ext4_map_blocks+0x224/0x310 [c000001bd1aaf4d0] c0000000002b7f2c .mpage_da_map_and_submit+0xbc/0x490 [c000001bd1aaf5a0] c0000000002b8688 .write_cache_pages_da+0x2c8/0x430 [c000001bd1aaf720] c0000000002b8b28 .ext4_da_writepages+0x338/0x670 [c000001bd1aaf8d0] c000000000157280 .do_writepages+0x40/0x90 [c000001bd1aaf940] c0000000001ea830 .writeback_single_inode+0xe0/0x530 [c000001bd1aafa00] c0000000001eb680 .writeback_sb_inodes+0x210/0x300 [c000001bd1aafb20] c0000000001ebc84 .__writeback_inodes_wb+0xd4/0x140 [c000001bd1aafbe0] c0000000001ebfec .wb_writeback+0x2fc/0x3e0 [c000001bd1aafce0] c0000000001ed770 .wb_do_writeback+0x2f0/0x300 [c000001bd1aafdf0] c0000000001ed848 .bdi_writeback_thread+0xc8/0x340 [c000001bd1aafed0] c0000000000c5494 .kthread+0xb4/0xc0 [c000001bd1aaff90] c000000000021f48 .kernel_thread+0x54/0x70 This is due to getting ext_depth(inode) == 0x101 and therefore running off the end of the path array in ext4_ext_drop_refs into following unallocated structures. This fixes it by adding the necessary le16_to_cpu. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>		2011-12-12 11:00:56 -05:00
..
acl.c	switch posix_acl_equiv_mode() to umode_t *	2011-08-01 02:10:06 -04:00
acl.h	fs: take the ACL checks to common code	2011-07-25 14:30:23 -04:00
balloc.c	ext4: fix up a undefined error in ext4_free_blocks in debugging code	2011-11-21 12:09:19 -05:00
bitmap.c	ext4: Change unsigned long to unsigned int	2008-11-05 00:14:04 -05:00
block_validity.c	ext4: move ext4_ind_* functions from inode.c to indirect.c	2011-06-27 19:40:50 -04:00
dir.c	ext4: Use ext4_error_file() to print the pathname to the corrupted inode	2011-01-10 12:10:55 -05:00
ext4_extents.h	ext4: Fix bigalloc quota accounting and i_blocks value	2011-09-09 19:04:51 -04:00
ext4_jbd2.c	jbd2: add debugging information to jbd2_journal_dirty_metadata()	2011-09-04 10:18:14 -04:00
ext4_jbd2.h	ext4: Fix ext4_should_writeback_data() for no-journal mode	2011-08-13 11:25:18 -04:00
ext4.h	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4	2011-11-02 10:06:20 -07:00
extents.c	ext4: Fix crash due to getting bogus eh_depth value on big-endian systems	2011-12-12 11:00:56 -05:00
file.c	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4	2011-11-02 10:06:20 -07:00
fsync.c	ext4: optimize locking for end_io extent conversion	2011-10-31 10:56:32 -04:00
hash.c	ext4: Add support for non-native signed/unsigned htree hash algorithms	2008-10-28 13:21:44 -04:00
ialloc.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/vfs-queue	2011-11-02 11:41:01 -07:00
indirect.c	ext4: enforce bigalloc restrictions (e.g., no online resizing, etc.)	2011-09-09 18:36:51 -04:00
inode.c	ext4: fix ext4_end_io_dio() racing against fsync()	2011-12-12 10:53:02 -05:00
ioctl.c	ext4: add __user decoration to calls of copy_{from,to}_user()	2011-10-18 10:59:51 -04:00
Kconfig	ext4: Don't ask about supporting ext2/3 in ext4 if ext4 is not configured	2009-12-21 10:54:09 -05:00
Makefile	ext4: move ext4_ind_* functions from inode.c to indirect.c	2011-06-27 19:40:50 -04:00
mballoc.c	ext4: fix a wrong comment in __mb_check_buddy()	2011-10-26 08:48:54 -04:00
mballoc.h	ext4: fix a typo in struct ext4_allocation_context	2011-10-31 18:55:50 -04:00
migrate.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/vfs-queue	2011-11-02 11:41:01 -07:00
mmp.c	ext4: Fix comparison endianness problem in MMP initialization	2011-10-18 10:53:51 -04:00
move_extent.c	ext4: add some tracepoints in ext4/extents.c	2011-09-09 19:18:51 -04:00
namei.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/vfs-queue	2011-11-02 11:41:01 -07:00
page-io.c	ext4: Create helper function for EXT4_IO_END_UNWRITTEN and i_aiodio_unwritten	2011-10-31 17:30:44 -04:00
resize.c	ext4: Rename ext4_free_blks_{count,set}() to refer to clusters	2011-09-09 19:08:51 -04:00
super.c	ext4: Remove kernel_lock annotations	2011-11-07 10:50:09 -05:00
symlink.c	ext4: symlink must be handled via filesystem specific operation	2010-05-16 02:00:00 -04:00
truncate.h	ext4: move common truncate functions to header file	2011-06-27 19:16:04 -04:00
xattr_security.c	security: new security_inode_init_security API adds function callback	2011-07-18 12:29:38 -04:00
xattr_trusted.c	ext4: constify xattr_handler	2010-05-21 18:31:19 -04:00
xattr_user.c	ext4: constify xattr_handler	2010-05-21 18:31:19 -04:00
xattr.c	ext4: fix race in xattr block allocation path	2011-10-29 10:15:35 -04:00
xattr.h	fs/vfs/security: pass last path component to LSM on inode creation	2011-02-01 11:12:29 -05:00