On Tue, Nov 01, 2011 at 10:05:03AM +0800, Eryu Guan wrote: > I hit a J_ASSERT(blocknr != 0) failure in cleanup_journal_tail() when > mounting a fsfuzzed ext3 image. It turns out that the corrupted ext3 > image has s_first = 0 in journal superblock, and the 0 is passed to > journal->j_head in journal_reset(), then to blocknr in > cleanup_journal_tail(), in the end the J_ASSERT failed. > > So validate s_first after reading journal superblock from disk in > journal_get_superblock() to ensure s_first is valid. > > ... > > Signed-off-by: Eryu Guan <guaneryu@xxxxxxxxx> Thanks, applied. (I took the jbd fixup as well, since it's obvious) - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
