This is a note to let you know that I've just added the patch titled
xfs: add a function to deal with corrupt buffers post-verifiers
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
xfs-add-a-function-to-deal-with-corrupt-buffers-post-verifiers.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Wed Oct 26 04:49:40 PM CEST 2022
From: Chandan Babu R <chandan.babu@xxxxxxxxxx>
Date: Wed, 26 Oct 2022 11:58:21 +0530
Subject: xfs: add a function to deal with corrupt buffers post-verifiers
To: gregkh@xxxxxxxxxxxxxxxxxxx
Cc: sashal@xxxxxxxxxx, mcgrof@xxxxxxxxxx, linux-xfs@xxxxxxxxxxxxxxx, stable@xxxxxxxxxxxxxxx, djwong@xxxxxxxxxx, chandan.babu@xxxxxxxxxx, amir73il@xxxxxxxxx, leah.rumancik@xxxxxxxxx
Message-ID: <20221026062843.927600-5-chandan.babu@xxxxxxxxxx>
From: "Darrick J. Wong" <darrick.wong@xxxxxxxxxx>
commit 8d57c21600a514d7a9237327c2496ae159bab5bb upstream.
Add a helper function to get rid of buffers that we have decided are
corrupt after the verifiers have run. This function is intended to
handle metadata checks that can't happen in the verifiers, such as
inter-block relationship checking. Note that we now mark the buffer
stale so that it will not end up on any LRU and will be purged on
release.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Reviewed-by: Dave Chinner <dchinner@xxxxxxxxxx>
Acked-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Signed-off-by: Chandan Babu R <chandan.babu@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/xfs/libxfs/xfs_alloc.c | 2 +-
fs/xfs/libxfs/xfs_attr_leaf.c | 6 +++---
fs/xfs/libxfs/xfs_btree.c | 2 +-
fs/xfs/libxfs/xfs_da_btree.c | 10 +++++-----
fs/xfs/libxfs/xfs_dir2_leaf.c | 2 +-
fs/xfs/libxfs/xfs_dir2_node.c | 6 +++---
fs/xfs/xfs_attr_inactive.c | 6 +++---
fs/xfs/xfs_attr_list.c | 2 +-
fs/xfs/xfs_buf.c | 22 ++++++++++++++++++++++
fs/xfs/xfs_buf.h | 2 ++
fs/xfs/xfs_error.c | 2 ++
fs/xfs/xfs_inode.c | 4 ++--
12 files changed, 46 insertions(+), 20 deletions(-)
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -685,7 +685,7 @@ xfs_alloc_update_counters(
xfs_trans_agblocks_delta(tp, len);
if (unlikely(be32_to_cpu(agf->agf_freeblks) >
be32_to_cpu(agf->agf_length))) {
- xfs_buf_corruption_error(agbp);
+ xfs_buf_mark_corrupt(agbp);
return -EFSCORRUPTED;
}
--- a/fs/xfs/libxfs/xfs_attr_leaf.c
+++ b/fs/xfs/libxfs/xfs_attr_leaf.c
@@ -2288,7 +2288,7 @@ xfs_attr3_leaf_lookup_int(
xfs_attr3_leaf_hdr_from_disk(args->geo, &ichdr, leaf);
entries = xfs_attr3_leaf_entryp(leaf);
if (ichdr.count >= args->geo->blksize / 8) {
- xfs_buf_corruption_error(bp);
+ xfs_buf_mark_corrupt(bp);
return -EFSCORRUPTED;
}
@@ -2307,11 +2307,11 @@ xfs_attr3_leaf_lookup_int(
break;
}
if (!(probe >= 0 && (!ichdr.count || probe < ichdr.count))) {
- xfs_buf_corruption_error(bp);
+ xfs_buf_mark_corrupt(bp);
return -EFSCORRUPTED;
}
if (!(span <= 4 || be32_to_cpu(entry->hashval) == hashval)) {
- xfs_buf_corruption_error(bp);
+ xfs_buf_mark_corrupt(bp);
return -EFSCORRUPTED;
}
--- a/fs/xfs/libxfs/xfs_btree.c
+++ b/fs/xfs/libxfs/xfs_btree.c
@@ -1820,7 +1820,7 @@ xfs_btree_lookup_get_block(
out_bad:
*blkp = NULL;
- xfs_buf_corruption_error(bp);
+ xfs_buf_mark_corrupt(bp);
xfs_trans_brelse(cur->bc_tp, bp);
return -EFSCORRUPTED;
}
--- a/fs/xfs/libxfs/xfs_da_btree.c
+++ b/fs/xfs/libxfs/xfs_da_btree.c
@@ -504,7 +504,7 @@ xfs_da3_split(
node = oldblk->bp->b_addr;
if (node->hdr.info.forw) {
if (be32_to_cpu(node->hdr.info.forw) != addblk->blkno) {
- xfs_buf_corruption_error(oldblk->bp);
+ xfs_buf_mark_corrupt(oldblk->bp);
error = -EFSCORRUPTED;
goto out;
}
@@ -517,7 +517,7 @@ xfs_da3_split(
node = oldblk->bp->b_addr;
if (node->hdr.info.back) {
if (be32_to_cpu(node->hdr.info.back) != addblk->blkno) {
- xfs_buf_corruption_error(oldblk->bp);
+ xfs_buf_mark_corrupt(oldblk->bp);
error = -EFSCORRUPTED;
goto out;
}
@@ -1544,7 +1544,7 @@ xfs_da3_node_lookup_int(
}
if (magic != XFS_DA_NODE_MAGIC && magic != XFS_DA3_NODE_MAGIC) {
- xfs_buf_corruption_error(blk->bp);
+ xfs_buf_mark_corrupt(blk->bp);
return -EFSCORRUPTED;
}
@@ -1559,7 +1559,7 @@ xfs_da3_node_lookup_int(
/* Tree taller than we can handle; bail out! */
if (nodehdr.level >= XFS_DA_NODE_MAXDEPTH) {
- xfs_buf_corruption_error(blk->bp);
+ xfs_buf_mark_corrupt(blk->bp);
return -EFSCORRUPTED;
}
@@ -1567,7 +1567,7 @@ xfs_da3_node_lookup_int(
if (blkno == args->geo->leafblk)
expected_level = nodehdr.level - 1;
else if (expected_level != nodehdr.level) {
- xfs_buf_corruption_error(blk->bp);
+ xfs_buf_mark_corrupt(blk->bp);
return -EFSCORRUPTED;
} else
expected_level--;
--- a/fs/xfs/libxfs/xfs_dir2_leaf.c
+++ b/fs/xfs/libxfs/xfs_dir2_leaf.c
@@ -1344,7 +1344,7 @@ xfs_dir2_leaf_removename(
ltp = xfs_dir2_leaf_tail_p(args->geo, leaf);
bestsp = xfs_dir2_leaf_bests_p(ltp);
if (be16_to_cpu(bestsp[db]) != oldbest) {
- xfs_buf_corruption_error(lbp);
+ xfs_buf_mark_corrupt(lbp);
return -EFSCORRUPTED;
}
/*
--- a/fs/xfs/libxfs/xfs_dir2_node.c
+++ b/fs/xfs/libxfs/xfs_dir2_node.c
@@ -375,7 +375,7 @@ xfs_dir2_leaf_to_node(
ltp = xfs_dir2_leaf_tail_p(args->geo, leaf);
if (be32_to_cpu(ltp->bestcount) >
(uint)dp->i_d.di_size / args->geo->blksize) {
- xfs_buf_corruption_error(lbp);
+ xfs_buf_mark_corrupt(lbp);
return -EFSCORRUPTED;
}
@@ -449,7 +449,7 @@ xfs_dir2_leafn_add(
* into other peoples memory
*/
if (index < 0) {
- xfs_buf_corruption_error(bp);
+ xfs_buf_mark_corrupt(bp);
return -EFSCORRUPTED;
}
@@ -745,7 +745,7 @@ xfs_dir2_leafn_lookup_for_entry(
xfs_dir3_leaf_check(dp, bp);
if (leafhdr.count <= 0) {
- xfs_buf_corruption_error(bp);
+ xfs_buf_mark_corrupt(bp);
return -EFSCORRUPTED;
}
--- a/fs/xfs/xfs_attr_inactive.c
+++ b/fs/xfs/xfs_attr_inactive.c
@@ -145,7 +145,7 @@ xfs_attr3_node_inactive(
* Since this code is recursive (gasp!) we must protect ourselves.
*/
if (level > XFS_DA_NODE_MAXDEPTH) {
- xfs_buf_corruption_error(bp);
+ xfs_buf_mark_corrupt(bp);
xfs_trans_brelse(*trans, bp); /* no locks for later trans */
return -EFSCORRUPTED;
}
@@ -196,7 +196,7 @@ xfs_attr3_node_inactive(
error = xfs_attr3_leaf_inactive(trans, dp, child_bp);
break;
default:
- xfs_buf_corruption_error(child_bp);
+ xfs_buf_mark_corrupt(child_bp);
xfs_trans_brelse(*trans, child_bp);
error = -EFSCORRUPTED;
break;
@@ -281,7 +281,7 @@ xfs_attr3_root_inactive(
break;
default:
error = -EFSCORRUPTED;
- xfs_buf_corruption_error(bp);
+ xfs_buf_mark_corrupt(bp);
xfs_trans_brelse(*trans, bp);
break;
}
--- a/fs/xfs/xfs_attr_list.c
+++ b/fs/xfs/xfs_attr_list.c
@@ -271,7 +271,7 @@ xfs_attr_node_list_lookup(
return 0;
out_corruptbuf:
- xfs_buf_corruption_error(bp);
+ xfs_buf_mark_corrupt(bp);
xfs_trans_brelse(tp, bp);
return -EFSCORRUPTED;
}
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -1547,6 +1547,28 @@ xfs_buf_zero(
}
/*
+ * Log a message about and stale a buffer that a caller has decided is corrupt.
+ *
+ * This function should be called for the kinds of metadata corruption that
+ * cannot be detect from a verifier, such as incorrect inter-block relationship
+ * data. Do /not/ call this function from a verifier function.
+ *
+ * The buffer must be XBF_DONE prior to the call. Afterwards, the buffer will
+ * be marked stale, but b_error will not be set. The caller is responsible for
+ * releasing the buffer or fixing it.
+ */
+void
+__xfs_buf_mark_corrupt(
+ struct xfs_buf *bp,
+ xfs_failaddr_t fa)
+{
+ ASSERT(bp->b_flags & XBF_DONE);
+
+ xfs_buf_corruption_error(bp);
+ xfs_buf_stale(bp);
+}
+
+/*
* Handling of buffer targets (buftargs).
*/
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -270,6 +270,8 @@ static inline int xfs_buf_submit(struct
}
void xfs_buf_zero(struct xfs_buf *bp, size_t boff, size_t bsize);
+void __xfs_buf_mark_corrupt(struct xfs_buf *bp, xfs_failaddr_t fa);
+#define xfs_buf_mark_corrupt(bp) __xfs_buf_mark_corrupt((bp), __this_address)
/* Buffer Utility Routines */
extern void *xfs_buf_offset(struct xfs_buf *, size_t);
--- a/fs/xfs/xfs_error.c
+++ b/fs/xfs/xfs_error.c
@@ -345,6 +345,8 @@ xfs_corruption_error(
* Complain about the kinds of metadata corruption that we can't detect from a
* verifier, such as incorrect inter-block relationship data. Does not set
* bp->b_error.
+ *
+ * Call xfs_buf_mark_corrupt, not this function.
*/
void
xfs_buf_corruption_error(
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -2149,7 +2149,7 @@ xfs_iunlink_update_bucket(
* head of the list.
*/
if (old_value == new_agino) {
- xfs_buf_corruption_error(agibp);
+ xfs_buf_mark_corrupt(agibp);
return -EFSCORRUPTED;
}
@@ -2283,7 +2283,7 @@ xfs_iunlink(
next_agino = be32_to_cpu(agi->agi_unlinked[bucket_index]);
if (next_agino == agino ||
!xfs_verify_agino_or_null(mp, agno, next_agino)) {
- xfs_buf_corruption_error(agibp);
+ xfs_buf_mark_corrupt(agibp);
return -EFSCORRUPTED;
}
Patches currently in stable-queue which might be from chandan.babu@xxxxxxxxxx are
queue-5.4/xfs-check-owner-of-dir3-blocks.patch
queue-5.4/xfs-throttle-commits-on-delayed-background-cil-push.patch
queue-5.4/xfs-factor-common-ail-item-deletion-code.patch
queue-5.4/xfs-remove-the-xfs_dq_logitem_t-typedef.patch
queue-5.4/xfs-fix-buffer-corruption-reporting-when-xfs_dir3_free_header_check-fails.patch
queue-5.4/xfs-xfs_buf_corruption_error-should-take-__this_address.patch
queue-5.4/xfs-open-code-insert-range-extent-split-helper.patch
queue-5.4/xfs-don-t-write-a-corrupt-unmount-record-to-force-summary-counter-recalc.patch
queue-5.4/xfs-check-owner-of-dir3-data-blocks.patch
queue-5.4/xfs-factor-out-quotaoff-intent-ail-removal-and-memory-free.patch
queue-5.4/xfs-trylock-underlying-buffer-on-dquot-flush.patch
queue-5.4/xfs-remove-the-xfs_disk_dquot_t-and-xfs_dquot_t.patch
queue-5.4/xfs-add-a-function-to-deal-with-corrupt-buffers-post-verifiers.patch
queue-5.4/xfs-fix-use-after-free-on-cil-context-on-shutdown.patch
queue-5.4/xfs-tail-updates-only-need-to-occur-when-lsn-changes.patch
queue-5.4/xfs-use-scnprintf-for-avoiding-potential-buffer-overflow.patch
queue-5.4/xfs-move-inode-flush-to-the-sync-workqueue.patch
queue-5.4/xfs-lower-cil-flush-limit-for-large-logs.patch
queue-5.4/xfs-rework-collapse-range-into-an-atomic-operation.patch
queue-5.4/xfs-remove-the-xfs_qoff_logitem_t-typedef.patch
queue-5.4/xfs-fix-unmount-hang-and-memory-leak-on-shutdown-during-quotaoff.patch
queue-5.4/xfs-preserve-default-grace-interval-during-quotacheck.patch
queue-5.4/xfs-replace-function-declaration-by-actual-definition.patch
queue-5.4/xfs-rework-insert-range-into-an-atomic-operation.patch
queue-5.4/xfs-factor-out-a-new-xfs_log_force_inode-helper.patch
queue-5.4/xfs-reflink-should-force-the-log-out-if-mounted-with-wsync.patch
