Messages in this thread Patch in this message | | | From | Jamie Bainbridge <> | Subject | [PATCH net] qede: confirm skb is allocated before using | Date | Wed, 6 Apr 2022 21:19:19 +1000 |
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qede_build_skb() assumes build_skb() always works and goes straight to skb_reserve(). However, build_skb() can fail under memory pressure. This results in a kernel panic because the skb to reserve is NULL.
Add a check in case build_skb() failed to allocate and return NULL.
The NULL return is handled correctly in callers to qede_build_skb().
Fixes: 8a8633978b842 ("qede: Add build_skb() support.") Signed-off-by: Jamie Bainbridge <jamie.bainbridge@gmail.com> --- drivers/net/ethernet/qlogic/qede/qede_fp.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/qlogic/qede/qede_fp.c b/drivers/net/ethernet/qlogic/qede/qede_fp.c index b242000a77fd8db322672e541df074be9b5ce9ef..b7cc36589f592e995e3a12bb80bc7c8e3af7dc42 100644 --- a/drivers/net/ethernet/qlogic/qede/qede_fp.c +++ b/drivers/net/ethernet/qlogic/qede/qede_fp.c @@ -748,6 +748,9 @@ qede_build_skb(struct qede_rx_queue *rxq, buf = page_address(bd->data) + bd->page_offset; skb = build_skb(buf, rxq->rx_buf_seg_size); + if (unlikely(!skb)) + return NULL; + skb_reserve(skb, pad); skb_put(skb, len); -- 2.35.1
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