This is a note to let you know that I've just added the patch titled ipv4: disable BH when changing ip local port range to the 4.2-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: ipv4-disable-bh-when-changing-ip-local-port-range.patch and it can be found in the queue-4.2 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Tue Nov 17 14:34:38 PST 2015 From: WANG Cong <xiyou.wangcong@xxxxxxxxx> Date: Tue, 3 Nov 2015 14:32:57 -0800 Subject: ipv4: disable BH when changing ip local port range From: WANG Cong <xiyou.wangcong@xxxxxxxxx> [ Upstream commit 4ee3bd4a8c7463cdef0b82ebc33fc94a9170a7e0 ] This fixes the following lockdep warning: [ INFO: inconsistent lock state ] 4.3.0-rc7+ #1197 Not tainted --------------------------------- inconsistent {IN-SOFTIRQ-R} -> {SOFTIRQ-ON-W} usage. sysctl/1019 [HC0[0]:SC0[0]:HE1:SE1] takes: (&(&net->ipv4.ip_local_ports.lock)->seqcount){+.+-..}, at: [<ffffffff81921de7>] ipv4_local_port_range+0xb4/0x12a {IN-SOFTIRQ-R} state was registered at: [<ffffffff810bd682>] __lock_acquire+0x2f6/0xdf0 [<ffffffff810be6d5>] lock_acquire+0x11c/0x1a4 [<ffffffff818e599c>] inet_get_local_port_range+0x4e/0xae [<ffffffff8166e8e3>] udp_flow_src_port.constprop.40+0x23/0x116 [<ffffffff81671cb9>] vxlan_xmit_one+0x219/0xa6a [<ffffffff81672f75>] vxlan_xmit+0xa6b/0xaa5 [<ffffffff817f2deb>] dev_hard_start_xmit+0x2ae/0x465 [<ffffffff817f35ed>] __dev_queue_xmit+0x531/0x633 [<ffffffff817f3702>] dev_queue_xmit_sk+0x13/0x15 [<ffffffff818004a5>] neigh_resolve_output+0x12f/0x14d [<ffffffff81959cfa>] ip6_finish_output2+0x344/0x39f [<ffffffff8195bf58>] ip6_finish_output+0x88/0x8e [<ffffffff8195bfef>] ip6_output+0x91/0xe5 [<ffffffff819792ae>] dst_output_sk+0x47/0x4c [<ffffffff81979392>] NF_HOOK_THRESH.constprop.30+0x38/0x82 [<ffffffff8197981e>] mld_sendpack+0x189/0x266 [<ffffffff8197b28b>] mld_ifc_timer_expire+0x1ef/0x223 [<ffffffff810de581>] call_timer_fn+0xfb/0x28c [<ffffffff810ded1e>] run_timer_softirq+0x1c7/0x1f1 Fixes: b8f1a55639e6 ("udp: Add function to make source port for UDP tunnels") Cc: Tom Herbert <tom@xxxxxxxxxxxxxxx> Signed-off-by: Cong Wang <xiyou.wangcong@xxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- net/ipv4/sysctl_net_ipv4.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -47,14 +47,14 @@ static void set_local_port_range(struct { bool same_parity = !((range[0] ^ range[1]) & 1); - write_seqlock(&net->ipv4.ip_local_ports.lock); + write_seqlock_bh(&net->ipv4.ip_local_ports.lock); if (same_parity && !net->ipv4.ip_local_ports.warned) { net->ipv4.ip_local_ports.warned = true; pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n"); } net->ipv4.ip_local_ports.range[0] = range[0]; net->ipv4.ip_local_ports.range[1] = range[1]; - write_sequnlock(&net->ipv4.ip_local_ports.lock); + write_sequnlock_bh(&net->ipv4.ip_local_ports.lock); } /* Validate changes from /proc interface. */ Patches currently in stable-queue which might be from xiyou.wangcong@xxxxxxxxx are queue-4.2/ipv4-disable-bh-when-changing-ip-local-port-range.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html