diff options
| -rw-r--r-- | io_uring/kbuf.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/io_uring/kbuf.c b/io_uring/kbuf.c index c95dc1736dd9..1af2bd56af44 100644 --- a/io_uring/kbuf.c +++ b/io_uring/kbuf.c @@ -218,10 +218,13 @@ static int io_ring_buffers_peek(struct io_kiocb *req, struct buf_sel_arg *arg, buf = io_ring_head_to_buf(br, head, bl->mask); if (arg->max_len) { - int needed; + u32 len = READ_ONCE(buf->len); + size_t needed; - needed = (arg->max_len + buf->len - 1) / buf->len; - needed = min(needed, PEEK_MAX_IMPORT); + if (unlikely(!len)) + return -ENOBUFS; + needed = (arg->max_len + len - 1) / len; + needed = min_not_zero(needed, (size_t) PEEK_MAX_IMPORT); if (nr_avail > needed) nr_avail = needed; } |