diff options
| author | Zach Brown <zab@redhat.com> | 2013-01-08 20:37:58 +0100 |
|---|---|---|
| committer | Josef Bacik <josef@toxicpanda.com> | 2013-01-14 19:53:23 +0100 |
| commit | f276795627045a3c599a60b476767861e4318c7d (patch) | |
| tree | 8e69e69fed84ae5b7ed675d490180e01c5a71f64 /fs | |
| parent | Btrfs: fix a bug when llseek for delalloc bytes behind prealloc extents (diff) | |
| download | linux-f276795627045a3c599a60b476767861e4318c7d.tar.xz linux-f276795627045a3c599a60b476767861e4318c7d.zip | |
btrfs: fix btrfs_cont_expand() freeing IS_ERR em
btrfs_cont_expand() tries to free an IS_ERR em as it gets an error from
btrfs_get_extent() and breaks out of its loop.
An instance of -EEXIST was reported in the wild:
https://bugzilla.redhat.com/show_bug.cgi?id=874407
I have no idea if that -EEXIST is surprising, or not. Regardless, this
error handling should be cleaned up to handle other reasonable errors
(ENOMEM, EIO; whatever).
This seemed to be the only buggy freeing of the relatively rare IS_ERR
em so I opted to fix the caller rather than teach free_extent_map() to
use IS_ERR_OR_NULL().
Signed-off-by: Zach Brown <zab@redhat.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/inode.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index ac98384b174e..3d2c64d4734a 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -3677,6 +3677,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size) block_end - cur_offset, 0); if (IS_ERR(em)) { err = PTR_ERR(em); + em = NULL; break; } last_byte = min(extent_map_end(em), block_end); |