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[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>
hifive-unleashed-5.1
David Chinner 2008-10-30 17:40:09 +11:00 committed by Lachlan McIlroy
parent 783a2f656f
commit 5a792c4579
1 changed files with 7 additions and 1 deletions
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8
fs/xfs/xfs_log_recover.c
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@ -1417,7 +1417,13 @@ 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 */