From: Thomas Falcon Date: Tue, 20 Feb 2018 02:12:57 +0000 (-0600) Subject: ibmvnic: Check for NULL skb's in NAPI poll routine X-Git-Tag: v5.15~9346^2~20 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=abe27a885d9e6575e663a16176dabc58ce9d7188;p=platform%2Fkernel%2Flinux-starfive.git ibmvnic: Check for NULL skb's in NAPI poll routine After introduction of commit d0869c0071e4, there were some instances of RX queue entries from a previous session (before the device was closed and reopened) returned to the NAPI polling routine. Since the corresponding socket buffers were freed, this resulted in a panic on reopen. Include a check for a NULL skb here to avoid this. Fixes: d0869c0071e4 ("ibmvnic: Clean RX pool buffers during device close") Signed-off-by: Thomas Falcon Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index 996f47568f9e..1495cb99f924 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -1901,6 +1901,11 @@ restart_poll: dev_kfree_skb_any(rx_buff->skb); remove_buff_from_pool(adapter, rx_buff); continue; + } else if (!rx_buff->skb) { + /* free the entry */ + next->rx_comp.first = 0; + remove_buff_from_pool(adapter, rx_buff); + continue; } length = be32_to_cpu(next->rx_comp.len);