forked from Minki/linux
bnx2x: fix possible panic under memory stress
While it is legal to kfree(NULL), it is not wise to use :
put_page(virt_to_head_page(NULL))
BUG: unable to handle kernel paging request at ffffeba400000000
IP: [<ffffffffc01f5928>] virt_to_head_page+0x36/0x44 [bnx2x]
Reported-by: Michel Lespinasse <walken@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Ariel Elior <ariel.elior@qlogic.com>
Fixes: d46d132cc0
("bnx2x: use netdev_alloc_frag()")
Signed-off-by: David S. Miller <davem@davemloft.net>
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parent
7f50236153
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@ -797,7 +797,8 @@ static void bnx2x_tpa_stop(struct bnx2x *bp, struct bnx2x_fastpath *fp,
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return;
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return;
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}
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}
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bnx2x_frag_free(fp, new_data);
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if (new_data)
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bnx2x_frag_free(fp, new_data);
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drop:
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drop:
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/* drop the packet and keep the buffer in the bin */
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/* drop the packet and keep the buffer in the bin */
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DP(NETIF_MSG_RX_STATUS,
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DP(NETIF_MSG_RX_STATUS,
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