[PATCH 6.6 033/121] xfs: inode recovery does not validate the recovered inode
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2024-02-13 17:27:53
Also in:
linux-patches
Subsystem:
filesystems (vfs and infrastructure), the rest, xfs filesystem · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds, Carlos Maiolino
6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dave Chinner <redacted> commit 038ca189c0d2c1570b4d922f25b524007c85cf94 upstream. Discovered when trying to track down a weird recovery corruption issue that wasn't detected at recovery time. The specific corruption was a zero extent count field when big extent counts are in use, and it turns out the dinode verifier doesn't detect that specific corruption case, either. So fix it too. Signed-off-by: Dave Chinner <redacted> Reviewed-by: "Darrick J. Wong" <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> Signed-off-by: Catherine Hoang <redacted> Acked-by: Chandan Babu R <chandanbabu@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- fs/xfs/libxfs/xfs_inode_buf.c | 3 +++ fs/xfs/xfs_inode_item_recover.c | 14 +++++++++++++- 2 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
index a35781577cad..0f970a0b3382 100644
--- a/fs/xfs/libxfs/xfs_inode_buf.c
+++ b/fs/xfs/libxfs/xfs_inode_buf.c@@ -508,6 +508,9 @@ xfs_dinode_verify( if (mode && nextents + naextents > nblocks) return __this_address; + if (nextents + naextents == 0 && nblocks != 0) + return __this_address; + if (S_ISDIR(mode) && nextents > mp->m_dir_geo->max_extents) return __this_address;
diff --git a/fs/xfs/xfs_inode_item_recover.c b/fs/xfs/xfs_inode_item_recover.c
index e6609067ef26..144198a6b270 100644
--- a/fs/xfs/xfs_inode_item_recover.c
+++ b/fs/xfs/xfs_inode_item_recover.c@@ -286,6 +286,7 @@ xlog_recover_inode_commit_pass2( struct xfs_log_dinode *ldip; uint isize; int need_free = 0; + xfs_failaddr_t fa; if (item->ri_buf[0].i_len == sizeof(struct xfs_inode_log_format)) { in_f = item->ri_buf[0].i_addr;
@@ -530,8 +531,19 @@ xlog_recover_inode_commit_pass2( (dip->di_mode != 0)) error = xfs_recover_inode_owner_change(mp, dip, in_f, buffer_list); - /* re-generate the checksum. */ + /* re-generate the checksum and validate the recovered inode. */ xfs_dinode_calc_crc(log->l_mp, dip); + fa = xfs_dinode_verify(log->l_mp, in_f->ilf_ino, dip); + if (fa) { + XFS_CORRUPTION_ERROR( + "Bad dinode after recovery", + XFS_ERRLEVEL_LOW, mp, dip, sizeof(*dip)); + xfs_alert(mp, + "Metadata corruption detected at %pS, inode 0x%llx", + fa, in_f->ilf_ino); + error = -EFSCORRUPTED; + goto out_release; + } ASSERT(bp->b_mount == mp); bp->b_flags |= _XBF_LOGRECOVERY;
--
2.43.0