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qede: confirm skb is allocated before using
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: 8a8633978b
("qede: Add build_skb() support.")
Signed-off-by: Jamie Bainbridge <jamie.bainbridge@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -748,6 +748,9 @@ qede_build_skb(struct qede_rx_queue *rxq,
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buf = page_address(bd->data) + bd->page_offset;
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skb = build_skb(buf, rxq->rx_buf_seg_size);
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if (unlikely(!skb))
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return NULL;
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skb_reserve(skb, pad);
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skb_put(skb, len);
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