[PATCH v2 5/9] btrfs: Check namelen in 'btrfs_check_ref_name_override'

[Su Yue]

Call 'btrfs_is_namelen_valid' before reading name.

Signed-off-by: Su Yue <suy.f...@cn.fujitsu.com>
---
 fs/btrfs/tree-log.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index ae51144571e2..fdab0f021197 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -4562,6 +4562,11 @@ static int btrfs_check_ref_name_override(struct 
extent_buffer *eb,
                        this_len = sizeof(*extref) + this_name_len;
                }
 
+               ret = btrfs_is_namelen_valid(eb, slot, name_ptr, this_name_len);
+               if (!ret) {
+                       ret = -EIO;
+                       goto out;
+               }
                if (this_name_len > name_len) {
                        char *new_name;
 
-- 
2.13.0



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