can: request_module (can-proto-0) failed.
tipc: TX() has been purged, node left!
dccp_close: ABORT with 24 bytes unread
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
CPU: 1 PID: 4785 Comm: syz-executor3 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fdb7c106c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fdb7c1076d4 R15: 0000000000000002
CPU: 0 PID: 4798 Comm: syz-executor2 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
dccp_close: ABORT with 24 bytes unread
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fd3650e3c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071c010 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fd3650e46d4 R15: 0000000000000004
CPU: 1 PID: 4820 Comm: syz-executor1 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
dccp_close: ABORT with 24 bytes unread
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
dccp_close: ABORT with 24 bytes unread
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
dccp_close: ABORT with 24 bytes unread
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
dccp_close: ABORT with 24 bytes unread
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fcad18d4c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fcad18d56d4 R15: 0000000000000002
CPU: 0 PID: 4843 Comm: syz-executor5 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
dccp_close: ABORT with 24 bytes unread
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
dccp_close: ABORT with 24 bytes unread
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
dccp_close: ABORT with 24 bytes unread
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
dccp_close: ABORT with 24 bytes unread
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe724ceac58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fe724ceb6d4 R15: 0000000000000001
CPU: 1 PID: 4862 Comm: syz-executor1 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fcad18d4c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fcad18d56d4 R15: 0000000000000002
CPU: 0 PID: 4882 Comm: syz-executor5 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe724ceac58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fe724ceb6d4 R15: 0000000000000002
CPU: 1 PID: 4885 Comm: syz-executor Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f455bb32c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f455bb336d4 R15: 0000000000000002
CPU: 0 PID: 4894 Comm: syz-executor3 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fdb7c106c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fdb7c1076d4 R15: 0000000000000002
CPU: 1 PID: 4910 Comm: syz-executor5 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe724ceac58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fe724ceb6d4 R15: 0000000000000002
CPU: 0 PID: 4914 Comm: syz-executor1 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fcad18b3c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071c010 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fcad18b46d4 R15: 0000000000000008
net_ratelimit: 12 callbacks suppressed
dccp_close: ABORT with 24 bytes unread
dccp_close: ABORT with 393 bytes unread
dccp_close: ABORT with 24 bytes unread
dccp_close: ABORT with 24 bytes unread
dccp_close: ABORT with 24 bytes unread
dccp_close: ABORT with 24 bytes unread
dccp_close: ABORT with 24 bytes unread
dccp_close: ABORT with 24 bytes unread
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
CPU: 1 PID: 4933 Comm: syz-executor2 Not tainted 5.6.0-rc1-syzkaller #0
dccp_close: ABORT with 24 bytes unread
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fd365104c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fd3651056d4 R15: 0000000000000002
CPU: 0 PID: 4939 Comm: syz-executor3 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
dccp_close: ABORT with 24 bytes unread
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fdb7c106c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fdb7c1076d4 R15: 0000000000000002
CPU: 1 PID: 4965 Comm: syz-executor1 Not tainted 5.6.0-rc1-syzkaller #0
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fcad18d4c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fcad18d56d4 R15: 0000000000000002
CPU: 0 PID: 4966 Comm: syz-executor4 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f6311082c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f63110836d4 R15: 0000000000000002
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
CPU: 0 PID: 4980 Comm: syz-executor Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f455bb32c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f455bb336d4 R15: 0000000000000002
CPU: 1 PID: 5001 Comm: syz-executor1 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fcad18d4c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fcad18d56d4 R15: 0000000000000002
CPU: 0 PID: 5010 Comm: syz-executor2 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fd365104c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fd3651056d4 R15: 0000000000000002
CPU: 1 PID: 5034 Comm: syz-executor1 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fcad18d4c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fcad18d56d4 R15: 0000000000000002
CPU: 0 PID: 5038 Comm: syz-executor Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:938 [inline]
 __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519
 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5198
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5312
 process_backlog+0x1f1/0x700 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x42d/0xde0 net/core/dev.c:6650
 __do_softirq+0x248/0x94c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>
 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline]
 ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa80 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x687/0xae0 net/socket.c:2343
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2397
 __sys_sendmsg+0xd9/0x180 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2437
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x452f89
Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f455bb32c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f455bb336d4 R15: 0000000000000002
CPU: 1 PID: 5054 Comm: syz-executor4 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118