From: trix@redhat.com
To: clm@fb.com, josef@toxicpanda.com, dsterba@suse.com
Cc: linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org,
Tom Rix <trix@redhat.com>
Subject: [PATCH] btfrs: initialize return of btrfs_extent_same
Date: Sun, 5 Jul 2020 07:20:58 -0700 [thread overview]
Message-ID: <20200705142058.28305-1-trix@redhat.com> (raw)
From: Tom Rix <trix@redhat.com>
clang static analysis flags a garbage return
fs/btrfs/reflink.c:611:2: warning: Undefined or garbage value returned to caller [core.uninitialized.UndefReturn]
return ret;
^~~~~~~~~~
ret will not be set when olen is 0
When olen is 0, this function does no work.
So initialize ret to 0
Signed-off-by: Tom Rix <trix@redhat.com>
---
fs/btrfs/reflink.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/btrfs/reflink.c b/fs/btrfs/reflink.c
index 040009d1cc31..200a80fcbecb 100644
--- a/fs/btrfs/reflink.c
+++ b/fs/btrfs/reflink.c
@@ -572,7 +572,7 @@ 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;
--
2.18.1
next reply other threads:[~2020-07-05 14:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-05 14:20 trix [this message]
2020-07-05 14:48 ` [PATCH] btfrs: initialize return of btrfs_extent_same Nikolay Borisov
2020-07-07 15:47 ` David Sterba
2020-07-05 14:48 ` Nikolay Borisov
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