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503358ae01
linux/fs/ext4
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Theodore Ts'o 503358ae01 ext4: avoid divide by zero when trying to mount a corrupted file system 
If s_log_groups_per_flex is greater than 31, then groups_per_flex will
will overflow and cause a divide by zero error.  This can cause kernel
BUG if such a file system is mounted.

Thanks to Nageswara R Sastry for analyzing the failure and providing
an initial patch.

http://bugzilla.kernel.org/show_bug.cgi?id=14287

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
2009-11-23 07:24:46 -05:00
..
acl.c ext[234]: move over to 'check_acl' permission model 2009-09-08 11:09:04 -07:00
acl.h ext[234]: move over to 'check_acl' permission model 2009-09-08 11:09:04 -07:00
balloc.c ext4: open-code ext4_mb_update_group_info 2009-08-17 23:51:29 -04:00
bitmap.c ext4: Change unsigned long to unsigned int 2008-11-05 00:14:04 -05:00
block_validity.c ext4: Add a comprehensive block validity check to ext4_get_blocks() 2009-05-17 15:38:01 -04:00
dir.c ext4: Define a new set of flags for ext4_get_blocks() 2009-05-14 00:58:52 -04:00
ext4_extents.h ext4: Split uninitialized extents for direct I/O 2009-09-28 15:49:08 -04:00
ext4_jbd2.c ext4: Assure that metadata blocks are written during fsync in no journal mode 2009-09-12 13:41:55 -04:00
ext4_jbd2.h ext4: Handle nested ext4_journal_start/stop calls without a journal 2009-09-29 11:01:03 -04:00
ext4.h ext4: skip conversion of uninit extents after direct IO if there isn't any 2009-11-10 10:48:04 -05:00
extents.c ext4: Fix return value of ext4_split_unwritten_extents() to fix direct I/O 2009-11-06 04:01:23 -05:00
file.c const: mark struct vm_struct_operations 2009-09-27 11:39:25 -07:00
fsync.c ext4: async direct IO for holes and fallocate support 2009-09-28 15:48:29 -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 ext4: fix build warning when EXT4FS_DEBUG is on 2009-07-27 21:44:40 -04:00
inode.c ext4: skip conversion of uninit extents after direct IO if there isn't any 2009-11-10 10:48:04 -05:00
ioctl.c ext4: Return exchanged blocks count to user space in failure 2009-09-05 22:46:29 -04:00
Kconfig ext4: drop ext4dev compat 2009-10-01 02:21:07 -04:00
Makefile ext4: online defrag -- Add EXT4_IOC_MOVE_EXT ioctl 2009-06-17 19:24:03 -04:00
mballoc.c ext4: Use tracepoints for mb_history trace file 2009-09-30 00:32:42 -04:00
mballoc.h ext4: Use tracepoints for mb_history trace file 2009-09-30 00:32:42 -04:00
migrate.c ext4: Split uninitialized extents for direct I/O 2009-09-28 15:49:08 -04:00
move_extent.c ext4: EXT4_IOC_MOVE_EXT: Check for different original and donor inodes first 2009-09-28 15:58:29 -04:00
namei.c ext4: fix potential buffer head leak when add_dirent_to_buf() returns ENOSPC 2009-11-23 07:25:49 -05:00
resize.c ext4: Clarify the locking details in mballoc 2009-09-09 23:50:17 -04:00
super.c ext4: avoid divide by zero when trying to mount a corrupted file system 2009-11-23 07:24:46 -05:00
symlink.c ext4: Rename ext4dev to ext4 2008-10-10 20:02:48 -04:00
xattr_security.c ext4: move headers out of include/linux 2008-04-29 18:13:32 -04:00
xattr_trusted.c ext4: remove double definitions of xattr macros 2008-07-11 19:27:31 -04:00
xattr_user.c ext4: remove double definitions of xattr macros 2008-07-11 19:27:31 -04:00
xattr.c ext4: limit block allocations for indirect-block files to < 2^32 2009-09-16 14:45:10 -04:00
xattr.h ext4: Rename ext4dev to ext4 2008-10-10 20:02:48 -04:00