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From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: darrick.wong@oracle.com
Cc: linux-xfs@vger.kernel.org
Subject: [PATCH 06/10] xfs: improve the code that checks recovered refcount intent items
Date: Mon, 30 Nov 2020 19:38:16 -0800	[thread overview]
Message-ID: <160679389653.447963.16793899927769871684.stgit@magnolia> (raw)
In-Reply-To: <160679385987.447963.9630288535682256882.stgit@magnolia>

From: Darrick J. Wong <darrick.wong@oracle.com>

The code that validates recovered refcount intent items is kind of a
mess -- it doesn't use the standard xfs type validators, and it doesn't
check for things that it should.  Fix the validator function to use the
standard validation helpers and look for more types of obvious errors.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/xfs/xfs_refcount_item.c |   24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)


diff --git a/fs/xfs/xfs_refcount_item.c b/fs/xfs/xfs_refcount_item.c
index de344bd7e73c..20e5c22bb754 100644
--- a/fs/xfs/xfs_refcount_item.c
+++ b/fs/xfs/xfs_refcount_item.c
@@ -423,27 +423,27 @@ xfs_cui_validate_phys(
 	struct xfs_mount		*mp,
 	struct xfs_phys_extent		*refc)
 {
-	xfs_fsblock_t			startblock_fsb;
-	bool				op_ok;
+	xfs_fsblock_t			end;
+
+	if (refc->pe_flags & ~XFS_REFCOUNT_EXTENT_FLAGS)
+		return false;
 
-	startblock_fsb = XFS_BB_TO_FSB(mp,
-			   XFS_FSB_TO_DADDR(mp, refc->pe_startblock));
 	switch (refc->pe_flags & XFS_REFCOUNT_EXTENT_TYPE_MASK) {
 	case XFS_REFCOUNT_INCREASE:
 	case XFS_REFCOUNT_DECREASE:
 	case XFS_REFCOUNT_ALLOC_COW:
 	case XFS_REFCOUNT_FREE_COW:
-		op_ok = true;
 		break;
 	default:
-		op_ok = false;
-		break;
+		return false;
 	}
-	if (!op_ok || startblock_fsb == 0 ||
-	    refc->pe_len == 0 ||
-	    startblock_fsb >= mp->m_sb.sb_dblocks ||
-	    refc->pe_len >= mp->m_sb.sb_agblocks ||
-	    (refc->pe_flags & ~XFS_REFCOUNT_EXTENT_FLAGS))
+
+	if (refc->pe_startblock + refc->pe_len <= refc->pe_startblock)
+		return false;
+
+	end = refc->pe_startblock + refc->pe_len - 1;
+	if (!xfs_verify_fsbno(mp, refc->pe_startblock) ||
+	    !xfs_verify_fsbno(mp, end))
 		return false;
 
 	return true;


  parent reply	other threads:[~2020-12-01  3:39 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-01  3:37 [PATCH 00/10] xfs: strengthen log intent validation Darrick J. Wong
2020-12-01  3:37 ` [PATCH 01/10] xfs: hoist recovered bmap intent checks out of xfs_bui_item_recover Darrick J. Wong
2020-12-01 10:02   ` Christoph Hellwig
2020-12-01  3:37 ` [PATCH 02/10] xfs: improve the code that checks recovered bmap intent items Darrick J. Wong
2020-12-01 10:03   ` Christoph Hellwig
2020-12-01  3:37 ` [PATCH 03/10] xfs: hoist recovered rmap intent checks out of xfs_rui_item_recover Darrick J. Wong
2020-12-01 10:03   ` Christoph Hellwig
2020-12-01  3:38 ` [PATCH 04/10] xfs: improve the code that checks recovered rmap intent items Darrick J. Wong
2020-12-01 10:05   ` Christoph Hellwig
2020-12-01 16:33     ` Darrick J. Wong
2020-12-01 16:53   ` [PATCH v2 " Darrick J. Wong
2020-12-01  3:38 ` [PATCH 05/10] xfs: hoist recovered refcount intent checks out of xfs_cui_item_recover Darrick J. Wong
2020-12-01 10:05   ` Christoph Hellwig
2020-12-01  3:38 ` Darrick J. Wong [this message]
2020-12-01 10:06   ` [PATCH 06/10] xfs: improve the code that checks recovered refcount intent items Christoph Hellwig
2020-12-01  3:38 ` [PATCH 07/10] xfs: hoist recovered extent-free intent checks out of xfs_efi_item_recover Darrick J. Wong
2020-12-01 10:06   ` Christoph Hellwig
2020-12-01  3:38 ` [PATCH 08/10] xfs: improve the code that checks recovered extent-free intent items Darrick J. Wong
2020-12-01 10:07   ` Christoph Hellwig
2020-12-01  3:38 ` [PATCH 09/10] xfs: validate feature support when recovering rmap/refcount/bmap intents Darrick J. Wong
2020-12-01 10:07   ` Christoph Hellwig
2020-12-01  3:38 ` [PATCH 10/10] xfs: trace log intent item recovery failures Darrick J. Wong
2020-12-01 10:07   ` Christoph Hellwig
2020-12-04  1:11 [PATCH v2 00/10] xfs: strengthen log intent validation Darrick J. Wong
2020-12-04  1:12 ` [PATCH 06/10] xfs: improve the code that checks recovered refcount intent items Darrick J. Wong
2020-12-04 14:00   ` Brian Foster
2020-12-06 23:09 [PATCH v3 00/10] xfs: strengthen log intent validation Darrick J. Wong
2020-12-06 23:10 ` [PATCH 06/10] xfs: improve the code that checks recovered refcount intent items Darrick J. Wong

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