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| author | Dmitry Monakhov <dmonakhov@openvz.org> | 2013-03-18 11:40:19 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2013-03-18 11:40:19 -0400 |
| commit | 0e401101db49959f5783f6ee9e676124b5a183ac (patch) | |
| tree | 2fb6d2f9b21c60edbda1e0827fe725e50ac16c4d /fs/ext4/move_extent.c | |
| parent | 4f42f80a8f08d4c3f52c4267361241885d5dee3a (diff) | |
| download | linux-0e401101db49959f5783f6ee9e676124b5a183ac.tar.gz linux-0e401101db49959f5783f6ee9e676124b5a183ac.tar.bz2 linux-0e401101db49959f5783f6ee9e676124b5a183ac.zip | |
ext4: fix memory leakage in mext_check_coverage
Regression was introduced by following commit 8c854473
TESTCASE (git://oss.sgi.com/xfs/cmds/xfstests.git):
#while true;do ./check 301 || break ;done
Also fix potential memory leakage in get_ext_path() once
ext4_ext_find_extent() have failed.
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/move_extent.c')
| -rw-r--r-- | fs/ext4/move_extent.c | 35 |
1 files changed, 19 insertions, 16 deletions
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c index c1f15b203e98..bbae4ed15c3d 100644 --- a/fs/ext4/move_extent.c +++ b/fs/ext4/move_extent.c @@ -32,16 +32,18 @@ */ static inline int get_ext_path(struct inode *inode, ext4_lblk_t lblock, - struct ext4_ext_path **path) + struct ext4_ext_path **orig_path) { int ret = 0; + struct ext4_ext_path *path; - *path = ext4_ext_find_extent(inode, lblock, *path); - if (IS_ERR(*path)) { - ret = PTR_ERR(*path); - *path = NULL; - } else if ((*path)[ext_depth(inode)].p_ext == NULL) + path = ext4_ext_find_extent(inode, lblock, *orig_path); + if (IS_ERR(path)) + ret = PTR_ERR(path); + else if (path[ext_depth(inode)].p_ext == NULL) ret = -ENODATA; + else + *orig_path = path; return ret; } @@ -611,24 +613,25 @@ mext_check_coverage(struct inode *inode, ext4_lblk_t from, ext4_lblk_t count, { struct ext4_ext_path *path = NULL; struct ext4_extent *ext; + int ret = 0; ext4_lblk_t last = from + count; while (from < last) { *err = get_ext_path(inode, from, &path); if (*err) - return 0; + goto out; ext = path[ext_depth(inode)].p_ext; - if (!ext) { - ext4_ext_drop_refs(path); - return 0; - } - if (uninit != ext4_ext_is_uninitialized(ext)) { - ext4_ext_drop_refs(path); - return 0; - } + if (uninit != ext4_ext_is_uninitialized(ext)) + goto out; from += ext4_ext_get_actual_len(ext); ext4_ext_drop_refs(path); } - return 1; + ret = 1; +out: + if (path) { + ext4_ext_drop_refs(path); + kfree(path); + } + return ret; } /** |