From: Darrick J. Wong <djwong@kernel.org>
Date: Mon, 16 Dec 2024 02:18:44 +0000 (-0800)
Subject: xfs: return from xfs_symlink_verify early on V4 filesystems
X-Git-Tag: v6.13.0~80
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=3e8a2c473d885cbcb8bcdfd5497a4e98bf938323;p=thirdparty%2Fxfsprogs-dev.git

xfs: return from xfs_symlink_verify early on V4 filesystems

Source kernel commit: 7f8b718c58783f3ff0810b39e2f62f50ba2549f6

V4 symlink blocks didn't have headers, so return early if this is a V4
filesystem.

Cc: <stable@vger.kernel.org> # v5.1
Fixes: 39708c20ab5133 ("xfs: miscellaneous verifier magic value fixups")
Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---

diff --git a/libxfs/xfs_symlink_remote.c b/libxfs/xfs_symlink_remote.c
index 2ad586f3..1c355f75 100644
--- a/libxfs/xfs_symlink_remote.c
+++ b/libxfs/xfs_symlink_remote.c
@@ -89,8 +89,10 @@ xfs_symlink_verify(
 	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_dsymlink_hdr	*dsl = bp->b_addr;
 
+	/* no verification of non-crc buffers */
 	if (!xfs_has_crc(mp))
-		return __this_address;
+		return NULL;
+
 	if (!xfs_verify_magic(bp, dsl->sl_magic))
 		return __this_address;
 	if (!uuid_equal(&dsl->sl_uuid, &mp->m_sb.sb_meta_uuid))