4.14-stable review patch. If anyone has any objections, please let me know.
------------------ From: Thomas Falcon <[email protected]> [ Upstream commit abe27a885d9e6575e663a16176dabc58ce9d7188 ] 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 <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/net/ethernet/ibm/ibmvnic.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -1668,6 +1668,11 @@ 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);
