tree 545ee089625b9b4131773eb26c57a51889deda78
parent 0c8454f56623505a99463405fd7d5664adfbb094
author Theodore Ts'o <tytso@mit.edu> 1240595000 -0400
committer Theodore Ts'o <tytso@mit.edu> 1240595000 -0400

ext4: Fix softlockup caused by illegal i_file_acl value in on-disk inode

If the block containing external extended attributes (which is stored
in i_file_acl and i_file_acl_high) is larger than the on-disk
filesystem, the process which tried to access the extended attributes
will endlessly issue kernel printks complaining that
"__find_get_block_slow() failed", locking up that CPU until the system
is forcibly rebooted.

So when we read in the inode, make sure the i_file_acl value is legal,
and if not, flag the filesystem as being corrupted.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>