From: Theodore Ts'o <tytso@mit.edu>
Date: Mon, 12 Mar 2012 03:30:16 +0000 (-0400)
Subject: ext4: check for zero length extent
X-Git-Tag: v3.4-rc1~75^2~27
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=31d4f3a2f3c73f279ff96a7135d7202ef6833f12;p=pandora-kernel.git

ext4: check for zero length extent

Explicitly test for an extent whose length is zero, and flag that as a
corrupted extent.

This avoids a kernel BUG_ON assertion failure.

Tested: Without this patch, the file system image found in
tests/f_ext_zero_len/image.gz in the latest e2fsprogs sources causes a
kernel panic.  With this patch, an ext4 file system error is noted
instead, and the file system is marked as being corrupted.

https://bugzilla.kernel.org/show_bug.cgi?id=42859

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

Reading git-diff-tree failed