From b3749469112306a80925420b48a6e756b2beeed9 Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Mon, 31 Jan 2022 15:25:48 -0500 Subject: [PATCH] xfs: sb verifier doesn't handle uncached sb buffer Source kernel commit: 8cf07f3dd56195316be97758cb8b4e1d7183ea84 The verifier checks explicitly for bp->b_bn == XFS_SB_DADDR to match the primary superblock buffer, but the primary superblock is an uncached buffer and so bp->b_bn is always -1ULL. Hence this never matches and the CRC error reporting is wholly dependent on the mount superblock already being populated so CRC feature checks pass and allow CRC errors to be reported. Fix this so that the primary superblock CRC error reporting is not dependent on already having read the superblock into memory. Signed-off-by: Dave Chinner Reviewed-by: Darrick J. Wong Reviewed-by: Christoph Hellwig Signed-off-by: Darrick J. Wong Signed-off-by: Eric Sandeen --- libxfs/xfs_sb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libxfs/xfs_sb.c b/libxfs/xfs_sb.c index b2e214ee7..f29a59ae8 100644 --- a/libxfs/xfs_sb.c +++ b/libxfs/xfs_sb.c @@ -634,7 +634,7 @@ xfs_sb_read_verify( if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { /* Only fail bad secondaries on a known V5 filesystem */ - if (bp->b_bn == XFS_SB_DADDR || + if (bp->b_maps[0].bm_bn == XFS_SB_DADDR || xfs_sb_version_hascrc(&mp->m_sb)) { error = -EFSBADCRC; goto out_error; -- 2.47.2