Commit 07b0f009 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller

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: default avatarMichel Lespinasse <walken@google.com>
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Cc: Ariel Elior <ariel.elior@qlogic.com>
Fixes: d46d132c ("bnx2x: use netdev_alloc_frag()")
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7f502361
......@@ -797,7 +797,8 @@ static void bnx2x_tpa_stop(struct bnx2x *bp, struct bnx2x_fastpath *fp,
return;
}
bnx2x_frag_free(fp, new_data);
if (new_data)
bnx2x_frag_free(fp, new_data);
drop:
/* drop the packet and keep the buffer in the bin */
DP(NETIF_MSG_RX_STATUS,
......
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