From: Theodore Ts'o <tytso@mit.edu>
Date: Fri, 6 Jun 2025 22:52:13 +0000 (-0400)
Subject: libext2fs: fix ext2fs_link() when the directory has an extent tree depth > 1
X-Git-Tag: v1.47.3-rc2~19
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=205ea4dea7174997b28ad0dffdd6b861af8798f8;p=thirdparty%2Fe2fsprogs.git

libext2fs: fix ext2fs_link() when the directory has an extent tree depth > 1

Ext2fs_link() was passing the wrong inode number to ext2fs_bmap(); as
a result, when a directory inode was using extents and the extent tree
depth was greater than 1, the extent tree checksum would be
incorrectly calculated resulting in a error that the extent tree block
checksum was incorrect.

Fixes: 53aa6c54224f ("libext2fs: add the EXT2FS_LINK_APPEND flag ...)
Addresses-Debian-Bug: #1106854
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---

diff --git a/lib/ext2fs/link.c b/lib/ext2fs/link.c
index a617d0af..1697da39 100644
--- a/lib/ext2fs/link.c
+++ b/lib/ext2fs/link.c
@@ -641,7 +641,7 @@ retry:
 		struct dir_context ctx;
 
 		lblk = (inode.i_size / fs->blocksize) - 1;
-		retval = ext2fs_bmap2(fs, ino, &inode, NULL, 0, lblk,
+		retval = ext2fs_bmap2(fs, dir, &inode, NULL, 0, lblk,
 				      NULL, &pblk);
 		if (retval)
 			return retval;