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95599968d1
linux/fs/ext4
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Salman Qazi 95599968d1 ext4: remove mb_groups before tearing down the buddy_cache 
We can't have references held on pages in the s_buddy_cache while we are
trying to truncate its pages and put the inode.  All the pages must be
gone before we reach clear_inode.  This can only be gauranteed if we
can prevent new users from grabbing references to s_buddy_cache's pages.

The original bug can be reproduced and the bug fix can be verified by:

while true; do mount -t ext4 /dev/ram0 /export/hda3/ram0; \
	umount /export/hda3/ram0; done &

while true; do cat /proc/fs/ext4/ram0/mb_groups; done

Signed-off-by: Salman Qazi <sqazi@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
2012-05-31 23:52:14 -04:00
..
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: make block group checksums use metadata_csum algorithm 2012-04-29 18:45:10 -04:00
bitmap.c ext4: calculate and verify block bitmap checksum 2012-04-29 18:35:10 -04:00
block_validity.c ext2/3/4: delete unneeded includes of module.h 2012-01-09 13:52:10 +01:00
dir.c ext4: calculate and verify checksums of directory leaf blocks 2012-04-29 18:41:10 -04:00
ext4_extents.h ext4: verify and calculate checksums for extent tree blocks 2012-04-29 18:37:10 -04:00
ext4_jbd2.c ext4: calculate and verify superblock checksum 2012-04-29 18:29:10 -04:00
ext4_jbd2.h ext4: calculate and verify superblock checksum 2012-04-29 18:29:10 -04:00
ext4.h ext4: add debugging trigger for ext4_error() 2012-05-30 22:56:46 -04:00
extents.c ext4: fix format flag in ext4_ext_binsearch_idx() 2012-05-28 17:55:16 -04:00
file.c ext4: use consistent ssize_t type in ext4_file_write() 2012-05-28 18:06:51 -04:00
fsync.c ext4: fix race between sync and completed io work 2012-03-05 10:29:52 -05:00
hash.c ext4: return 32/64-bit dir name hash according to usage type 2012-03-18 22:44:40 -04:00
ialloc.c ext4: protect group inode free counting with group lock 2012-05-28 18:20:59 -04:00
indirect.c ext2/3/4: delete unneeded includes of module.h 2012-01-09 13:52:10 +01:00
inode.c ext4: let getattr report the right blocks in delalloc+bigalloc 2012-05-31 22:54:16 -04:00
ioctl.c ext4: don't trash state flags in EXT4_IOC_SETFLAGS 2012-05-31 23:46:01 -04:00
Kconfig ext4: load the crc32c driver if necessary 2012-04-29 18:27:10 -04:00
Makefile ext4: move ext4_ind_* functions from inode.c to indirect.c 2011-06-27 19:40:50 -04:00
mballoc.c ext4: remove mb_groups before tearing down the buddy_cache 2012-05-31 23:52:14 -04:00
mballoc.h ext4: remove EXT4_MB_{BITMAP,BUDDY} macros 2012-02-20 17:54:06 -05:00
migrate.c ext4: using PTR_ERR() on the wrong variable in ext4_ext_migrate() 2012-02-20 17:53:06 -05:00
mmp.c ext4: add checksums to the MMP block 2012-04-29 18:47:10 -04:00
move_extent.c ext4: add some tracepoints in ext4/extents.c 2011-09-09 19:18:51 -04:00
namei.c ext4: disallow hard-linked directory in ext4_lookup 2012-05-28 17:02:25 -04:00
page-io.c Revert "ext4: don't release page refs in ext4_end_bio()" 2012-03-29 17:00:56 -07:00
resize.c ext4: remove redundundant "(char *) bh->b_data" casts 2012-05-28 17:47:52 -04:00
super.c ext4: add missing save_error_info() to ext4_error() 2012-05-30 23:00:16 -04:00
symlink.c
truncate.h ext4: move common truncate functions to header file 2011-06-27 19:16:04 -04:00
xattr_security.c Merge branch 'for_linus' into for_linus_merged 2012-01-10 11:54:07 -05:00
xattr_trusted.c ext2/3/4: delete unneeded includes of module.h 2012-01-09 13:52:10 +01:00
xattr_user.c ext2/3/4: delete unneeded includes of module.h 2012-01-09 13:52:10 +01:00
xattr.c ext4: Calculate and verify checksums of extended attribute blocks 2012-04-29 18:43:10 -04:00
xattr.h ext4: change on-disk layout to support extended metadata checksumming 2012-04-29 18:23:10 -04:00