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| author | Darrick J. Wong <djwong@us.ibm.com> | 2010-11-19 09:56:44 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2010-11-19 09:56:44 -0500 |
| commit | 5a9ae68a349aa076bc8557ee2fcf865574459282 (patch) | |
| tree | 484c26f74f13a0c5962ac634c90462d98dea8e1a | |
| parent | 0587aa3d11f9769a301b21bff2c3ed8365606b8d (diff) | |
| download | op-kernel-dev-5a9ae68a349aa076bc8557ee2fcf865574459282.zip op-kernel-dev-5a9ae68a349aa076bc8557ee2fcf865574459282.tar.gz | |
ext4: ext4_fill_super shouldn't return 0 on corruption
At the start of ext4_fill_super, ret is set to -EINVAL, and any failure path
out of that function returns ret. However, the generic_check_addressable
clause sets ret = 0 (if it passes), which means that a subsequent failure (e.g.
a group checksum error) returns 0 even though the mount should fail. This
causes vfs_kern_mount in turn to think that the mount succeeded, leading to an
oops.
A simple fix is to avoid using ret for the generic_check_addressable check,
which was last changed in commit 30ca22c70e3ef0a96ff84de69cd7e8561b416cb2.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/super.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index ef09d14..14ada8c 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3265,13 +3265,14 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) * Test whether we have more sectors than will fit in sector_t, * and whether the max offset is addressable by the page cache. */ - ret = generic_check_addressable(sb->s_blocksize_bits, + err = generic_check_addressable(sb->s_blocksize_bits, ext4_blocks_count(es)); - if (ret) { + if (err) { ext4_msg(sb, KERN_ERR, "filesystem" " too large to mount safely on this system"); if (sizeof(sector_t) < 8) ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); + ret = err; goto failed_mount; } |
