This is a note to let you know that I've just added the patch titled
btrfs: reflink: initialize return value to 0 in btrfs_extent_same()
to the 5.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-reflink-initialize-return-value-to-0-in-btrfs_.patch
and it can be found in the queue-5.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 313ca18df406792deb2b4d3b79560092bd88b911
Author: Sidong Yang <realwakka@xxxxxxxxx>
Date: Thu Aug 26 14:44:36 2021 +0000
btrfs: reflink: initialize return value to 0 in btrfs_extent_same()
[ Upstream commit 44bee215f72f13874c0e734a0712c2e3264c0108 ]
Fix a warning reported by smatch that ret could be returned without
initialized. The dedupe operations are supposed to to return 0 for a 0
length range but the caller does not pass olen == 0. To keep this
behaviour and also fix the warning initialize ret to 0.
Reviewed-by: Filipe Manana <fdmanana@xxxxxxxx>
Signed-off-by: Sidong Yang <realwakka@xxxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/btrfs/reflink.c b/fs/btrfs/reflink.c
index 9b0814318e726..c71e49782e86d 100644
--- a/fs/btrfs/reflink.c
+++ b/fs/btrfs/reflink.c
@@ -649,7 +649,7 @@ static int btrfs_extent_same_range(struct inode *src, u64 loff, u64 len,
static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen,
struct inode *dst, u64 dst_loff)
{
- int ret;
+ int ret = 0;
u64 i, tail_len, chunk_count;
struct btrfs_root *root_dst = BTRFS_I(dst)->root;
