From: Pavel Machek <pavel@denx.de>
Date: Mon, 3 Aug 2020 09:35:06 +0000 (+0200)
Subject: btrfs: fix return value mixup in btrfs_get_extent
X-Git-Tag: v5.7.17~167
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=38c8b29edf4a9099f764f7cad9048b6e32d2394a;p=thirdparty%2Fkernel%2Fstable.git

btrfs: fix return value mixup in btrfs_get_extent

commit 881a3a11c2b858fe9b69ef79ac5ee9978a266dc9 upstream.

btrfs_get_extent() sets variable ret, but out: error path expect error
to be in variable err so the error code is lost.

Fixes: 6bf9e4bd6a27 ("btrfs: inode: Verify inode mode to avoid NULL pointer dereference")
CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Pavel Machek (CIP) <pavel@denx.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index e0b8aec5dc584..2ccfa424a892a 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -6640,7 +6640,7 @@ struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
 	    extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
 		/* Only regular file could have regular/prealloc extent */
 		if (!S_ISREG(inode->vfs_inode.i_mode)) {
-			ret = -EUCLEAN;
+			err = -EUCLEAN;
 			btrfs_crit(fs_info,
 		"regular/prealloc extent found for non-regular inode %llu",
 				   btrfs_ino(inode));