dccp: avoid deadlock in dccp_v4_ctl_send_reset
In the prep work I did before enabling BH while handling socket backlog, I missed two points in DCCP : 1) dccp_v4_ctl_send_reset() uses bh_lock_sock(), assuming BH were blocked. It is not anymore always true. 2) dccp_v4_route_skb() was using __IP_INC_STATS() instead of IP_INC_STATS() A similar fix was done for TCP, in commit 47dcc20a ("ipv4: tcp: ip_send_unicast_reply() is not BH safe") Fixes: 7309f882 ("dccp: do not assume DCCP code is non preemptible") Fixes: 5413d1ba ("net: do not block BH while processing socket backlog") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Showing
Please register or sign in to comment