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6f8ff53726
linux/fs/ext4
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Curt Wohlgemuth 6f8ff53726 ext4: handle NULL p_ext in ext4_ext_next_allocated_block() 
In ext4_ext_next_allocated_block(), the path[depth] might
have a p_ext that is NULL -- see ext4_ext_binsearch().  In
such a case, dereferencing it will crash the machine.

This patch checks for p_ext == NULL in
ext4_ext_next_allocated_block() before dereferencinging it.

Tested using a hand-crafted an inode with eh_entries == 0 in
an extent block, verified that running FIEMAP on it crashes
without this patch, works fine with it.

Signed-off-by: Curt Wohlgemuth <curtw@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2011-10-26 04:38:59 -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: rename ext4_has_free_blocks() to ext4_has_free_clusters() 2011-09-09 19:16:51 -04:00
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 ext4: update EOFBLOCKS flag on fallocate properly 2011-10-25 08:15:12 -04:00
extents.c ext4: handle NULL p_ext in ext4_ext_next_allocated_block() 2011-10-26 04:38:59 -04:00
file.c ext4: prevent stack overrun in ext4_file_open 2011-10-25 09:18:41 -04:00
fsync.c ext4: functions should not be declared extern 2011-10-18 10:57:51 -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: functions should not be declared extern 2011-10-18 10:57:51 -04:00
indirect.c ext4: enforce bigalloc restrictions (e.g., no online resizing, etc.) 2011-09-09 18:36:51 -04:00
inode.c ext4: update EOFBLOCKS flag on fallocate properly 2011-10-25 08:15:12 -04:00
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: Allow quota file use root reservation 2011-10-20 20:07:23 -04:00
mballoc.h ext4: teach ext4_free_blocks() about bigalloc and clusters 2011-09-09 18:50:51 -04:00
migrate.c ext4: add some tracepoints in ext4/extents.c 2011-09-09 19:18:51 -04:00
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 ext4: avoid setting directory i_nlink to zero 2011-10-26 03:22:31 -04:00
page-io.c ext4: remove i_mutex lock in ext4_evict_inode to fix lockdep complaining 2011-08-31 11:50:51 -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: fix ext4 so it works without CONFIG_PROC_FS 2011-10-08 16:26:03 -04:00
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 fs/vfs/security: pass last path component to LSM on inode creation 2011-02-01 11:12:29 -05:00
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: use ext4_reserve_inode_write in ext4_xattr_set_handle 2011-10-26 03:32:07 -04:00
xattr.h fs/vfs/security: pass last path component to LSM on inode creation 2011-02-01 11:12:29 -05:00