diff options
| author | Yunlei He <heyunlei@huawei.com> | 2016-12-19 13:10:48 +0100 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-01-29 04:46:01 +0100 |
| commit | 7855eba4d6102f811b6dd142d6c749f53b591fa3 (patch) | |
| tree | fe3d4bd41eec36e334bacc074a134e10626db079 /fs/f2fs/extent_cache.c | |
| parent | f2fs: remove unneeded condition (diff) | |
| download | linux-7855eba4d6102f811b6dd142d6c749f53b591fa3.tar.xz linux-7855eba4d6102f811b6dd142d6c749f53b591fa3.zip | |
f2fs: fix a problem of using memory after free
This patch fix a problem of using memory after free
in function __try_merge_extent_node.
Fixes: 0f825ee6e873 ("f2fs: add new interfaces for extent tree")
Cc: <stable@vger.kernel.org>
Signed-off-by: Yunlei He <heyunlei@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/extent_cache.c')
| -rw-r--r-- | fs/f2fs/extent_cache.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c index 4db44da7ef69..e02c3d88dc9a 100644 --- a/fs/f2fs/extent_cache.c +++ b/fs/f2fs/extent_cache.c @@ -352,11 +352,12 @@ static struct extent_node *__try_merge_extent_node(struct inode *inode, } if (next_ex && __is_front_mergeable(ei, &next_ex->ei)) { - if (en) - __release_extent_node(sbi, et, prev_ex); next_ex->ei.fofs = ei->fofs; next_ex->ei.blk = ei->blk; next_ex->ei.len += ei->len; + if (en) + __release_extent_node(sbi, et, prev_ex); + en = next_ex; } |