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authorDuane Griffin <duaneg@dghda.com>2008-07-11 19:27:31 -0400
committerTheodore Ts'o <tytso@mit.edu>2008-07-11 19:27:31 -0400
commit91ef4caf800030fa6e5224b8a41f8c74787b303d (patch)
treef0c058b50ac2eb9058aa8b077b2da733f8c3ee02 /fs/ext4/ialloc.c
parentbce7f793daec3e65ec5c5705d2457b81fe7b5725 (diff)
ext4: handle corrupted orphan list at mount
If the orphan node list includes valid, untruncatable nodes with nlink > 0 the ext4_orphan_cleanup loop which attempts to delete them will not do so, causing it to loop forever. Fix by checking for such nodes in the ext4_orphan_get function. This patch fixes the second case (image hdb.20000009.softlockup.gz) reported in http://bugzilla.kernel.org/show_bug.cgi?id=10882. Signed-off-by: Duane Griffin <duaneg@dghda.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ialloc.c')
-rw-r--r--fs/ext4/ialloc.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index c6efbab0c801..11cafe14aa27 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -817,6 +817,14 @@ struct inode *ext4_orphan_get(struct super_block *sb, unsigned long ino)
if (IS_ERR(inode))
goto iget_failed;
+ /*
+ * If the orphans has i_nlinks > 0 then it should be able to be
+ * truncated, otherwise it won't be removed from the orphan list
+ * during processing and an infinite loop will result.
+ */
+ if (inode->i_nlink && !ext4_can_truncate(inode))
+ goto bad_orphan;
+
if (NEXT_ORPHAN(inode) > max_ino)
goto bad_orphan;
brelse(bitmap_bh);
@@ -838,6 +846,7 @@ bad_orphan:
printk(KERN_NOTICE "NEXT_ORPHAN(inode)=%u\n",
NEXT_ORPHAN(inode));
printk(KERN_NOTICE "max_ino=%lu\n", max_ino);
+ printk(KERN_NOTICE "i_nlink=%u\n", inode->i_nlink);
/* Avoid freeing blocks if we got a bad deleted inode */
if (inode->i_nlink == 0)
inode->i_blocks = 0;