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| author | Yingtai Xie <xieyingtai@huawei.com> | 2014-08-06 16:03:54 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-06 18:01:13 -0700 |
| commit | 981035b47d7da8ba7c153ed431bf515f593853d8 (patch) | |
| tree | 675aab83a7118389728f0dbcc733a3d3cf18ae8d /fs/ocfs2/refcounttree.c | |
| parent | c811f5f41e37d16b2839988426ffde78d2273d48 (diff) | |
| download | lwn-981035b47d7da8ba7c153ed431bf515f593853d8.tar.gz lwn-981035b47d7da8ba7c153ed431bf515f593853d8.zip | |
ocfs2: correctly check the return value of ocfs2_search_extent_list
ocfs2_search_extent_list may return -1, so we should check the return
value in ocfs2_split_and_insert, otherwise it may cause array index out of
bound.
And ocfs2_search_extent_list can only return value less than
el->l_next_free_rec, so check if it is equal or larger than
le16_to_cpu(el->l_next_free_rec) is meaningless.
Signed-off-by: Yingtai Xie <xieyingtai@huawei.com>
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/refcounttree.c')
| -rw-r--r-- | fs/ocfs2/refcounttree.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c index 636aab69ead5..d81f6e2a97f5 100644 --- a/fs/ocfs2/refcounttree.c +++ b/fs/ocfs2/refcounttree.c @@ -3109,7 +3109,7 @@ static int ocfs2_clear_ext_refcount(handle_t *handle, el = path_leaf_el(path); index = ocfs2_search_extent_list(el, cpos); - if (index == -1 || index >= le16_to_cpu(el->l_next_free_rec)) { + if (index == -1) { ocfs2_error(sb, "Inode %llu has an extent at cpos %u which can no " "longer be found.\n", |