diff options
| author | Eric Sandeen <sandeen@redhat.com> | 2014-06-12 00:39:58 -0500 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-07-02 12:06:41 +0200 |
| commit | 591cb1f862018995e04a596b9bb0c469016c1c99 (patch) | |
| tree | 72ce17e47a997d0467dc6c86f845041cc1f8e8ba | |
| parent | f383013c585b3ef91f1f19f0c9d2e60071e5fb01 (diff) | |
btrfs: fix use of uninit "ret" in end_extent_writepage()
commit 3e2426bd0eb980648449e7a2f5a23e3cd3c7725c upstream.
If this condition in end_extent_writepage() is false:
if (tree->ops && tree->ops->writepage_end_io_hook)
we will then test an uninitialized "ret" at:
ret = ret < 0 ? ret : -EIO;
The test for ret is for the case where ->writepage_end_io_hook
failed, and we'd choose that ret as the error; but if
there is no ->writepage_end_io_hook, nothing sets ret.
Initializing ret to 0 should be sufficient; if
writepage_end_io_hook wasn't set, (!uptodate) means
non-zero err was passed in, so we choose -EIO in that case.
Signed-of-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
| -rw-r--r-- | fs/btrfs/extent_io.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index a3dd2806d651..b395791dd923 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -2312,7 +2312,7 @@ int end_extent_writepage(struct page *page, int err, u64 start, u64 end) { int uptodate = (err == 0); struct extent_io_tree *tree; - int ret; + int ret = 0; tree = &BTRFS_I(page->mapping->host)->io_tree; |