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| author | David Chinner <david@fromorbit.com> | 2008-10-30 17:40:09 +1100 |
|---|---|---|
| committer | Lachlan McIlroy <lachlan@redback.melbourne.sgi.com> | 2008-11-10 18:01:50 +1100 |
| commit | 220ca310a53200b4bfbc7c4c6e365eea284ec44f (patch) | |
| tree | a3ffc1927d22c9bfa25b2ab01e87fe07457bf5d6 /fs | |
| parent | 8f330f5149ef41ff943b04d914406cc417f62784 (diff) | |
| download | lwn-220ca310a53200b4bfbc7c4c6e365eea284ec44f.tar.gz lwn-220ca310a53200b4bfbc7c4c6e365eea284ec44f.zip | |
[XFS] XFS: Check for valid transaction headers in recovery
When we are about to add a new item to a transaction in recovery, we need
to check that it is valid first. Currently we just assert that header
magic number matches, but in production systems that is not present and we
add a corrupted transaction to the list to be processed. This results in a
kernel oops later when processing the corrupted transaction.
Instead, if we detect a corrupted transaction, abort recovery and leave
the user to clean up the mess that has occurred.
SGI-PV: 988145
SGI-Modid: xfs-linux-melb:xfs-kern:32356a
Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/xfs_log_recover.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 82d46ce69d5f..70e3ba32e6be 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -1419,7 +1419,13 @@ xlog_recover_add_to_trans( return 0; item = trans->r_itemq; if (item == NULL) { - ASSERT(*(uint *)dp == XFS_TRANS_HEADER_MAGIC); + /* we need to catch log corruptions here */ + if (*(uint *)dp != XFS_TRANS_HEADER_MAGIC) { + xlog_warn("XFS: xlog_recover_add_to_trans: " + "bad header magic number"); + ASSERT(0); + return XFS_ERROR(EIO); + } if (len == sizeof(xfs_trans_header_t)) xlog_recover_add_item(&trans->r_itemq); memcpy(&trans->r_theader, dp, len); /* d, s, l */ |