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-rw-r--r--fs/dlm/debug_fs.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c
index 8f471d9a9e3..9c3aeddc866 100644
--- a/fs/dlm/debug_fs.c
+++ b/fs/dlm/debug_fs.c
@@ -310,16 +310,19 @@ static ssize_t waiters_read(struct file *file, char __user *userbuf,
{
struct dlm_ls *ls = file->private_data;
struct dlm_lkb *lkb;
- size_t len = DLM_DEBUG_BUF_LEN, pos = 0, rv;
+ size_t len = DLM_DEBUG_BUF_LEN, pos = 0, ret, rv;
mutex_lock(&debug_buf_lock);
mutex_lock(&ls->ls_waiters_mutex);
memset(debug_buf, 0, sizeof(debug_buf));
list_for_each_entry(lkb, &ls->ls_waiters, lkb_wait_reply) {
- pos += snprintf(debug_buf + pos, len - pos, "%x %d %d %s\n",
- lkb->lkb_id, lkb->lkb_wait_type,
- lkb->lkb_nodeid, lkb->lkb_resource->res_name);
+ ret = snprintf(debug_buf + pos, len - pos, "%x %d %d %s\n",
+ lkb->lkb_id, lkb->lkb_wait_type,
+ lkb->lkb_nodeid, lkb->lkb_resource->res_name);
+ if (ret >= len - pos)
+ break;
+ pos += ret;
}
mutex_unlock(&ls->ls_waiters_mutex);