bisecting fixing commit since 1d966eb4d6326a2521073174e9710713e9846e8b
building syzkaller on 56cc113a8ea223321811dcbe8de975e081f5f5b2
testing commit 1d966eb4d6326a2521073174e9710713e9846e8b with gcc (GCC) 8.1.0
kernel signature: de7f5cfcca010f9e8e7d48377e2edb4a3c643019e270d991b4821344ec5cf2b0
all runs: crashed: BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx_his
testing current HEAD 04300d66f0a06d572d9f2ad6768c38cabde22179
testing commit 04300d66f0a06d572d9f2ad6768c38cabde22179 with gcc (GCC) 8.1.0
kernel signature: f4f26fbc59be932926a184df50771bb9fe1ef6d222177a4bbf725c1985ae8041
all runs: crashed: BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx_his
revisions tested: 2, total time: 14m28.07663862s (build: 6m36.903439896s, test: 7m7.80461674s)
the crash still happens on HEAD
commit msg: Merge tag 'riscv-for-linus-5.8-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux into master
crash: BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx_his
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: 0 PID: 4105 Comm: syz-executor2 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa04f022c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fa04f0236d4 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: 1 PID: 4195 Comm: syz-executor4 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f15ffd5fc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f15ffd606d4 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: 1 PID: 4496 Comm: syz-executor5 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fb3fb170c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fb3fb1716d4 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: 1 PID: 4650 Comm: syz-executor4 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f15ffd5fc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f15ffd606d4 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: 5190 Comm: syz-executor Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
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+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f6573559c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f657355a6d4 R15: 0000000000000002
CPU: 1 PID: 5224 Comm: syz-executor4 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f15ffd5fc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f15ffd606d4 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: 5383 Comm: syz-executor4 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f15ffd5fc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f15ffd606d4 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: 1 PID: 5486 Comm: syz-executor4 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f15ffd5fc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f15ffd606d4 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: 5567 Comm: syz-executor5 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fb3fb170c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fb3fb1716d4 R15: 0000000000000002
net_ratelimit: 389 callbacks suppressed
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
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: 0 PID: 5741 Comm: syz-executor3 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe47a6f0c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fe47a6f16d4 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: 1 PID: 5870 Comm: syz-executor2 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
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()
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa04f022c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fa04f0236d4 R15: 0000000000000002
CPU: 0 PID: 5891 Comm: syz-executor4 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
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.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f15ffd5fc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f15ffd606d4 R15: 0000000000000002
CPU: 1 PID: 5929 Comm: syz-executor3 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
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+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe47a6f0c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fe47a6f16d4 R15: 0000000000000002
CPU: 0 PID: 5952 Comm: syz-executor Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f6573559c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f657355a6d4 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: 6176 Comm: syz-executor1 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f49817d7c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f49817d86d4 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: 1 PID: 6493 Comm: syz-executor5 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fb3fb170c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fb3fb1716d4 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: 1 PID: 6630 Comm: syz-executor3 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
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()
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe47a6f0c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fe47a6f16d4 R15: 0000000000000002
CPU: 0 PID: 6666 Comm: syz-executor2 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
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()
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa04f022c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fa04f0236d4 R15: 0000000000000002
CPU: 1 PID: 6715 Comm: syz-executor Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2352
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2406
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x453009
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 ab b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f6573559c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453009
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f657355a6d4 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: 6952 Comm: syz-executor4 Not tainted 5.8.0-rc6-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+0xb9/0xf1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0x31/0x70 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0x3b/0x60 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:997 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:519
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x8d/0x120 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
net_ratelimit: 329 callbacks suppressed
dccp_close: ABORT with 24 bytes unread
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5281
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5395
 process_backlog+0x101/0x280 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x16f/0x460 net/core/dev.c:6752
 __do_softirq+0xd3/0x473 kernel/softirq.c:292
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
dccp_close: ABORT with 24 bytes unread
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x81/0x90 arch/x86/kernel/irq_64.c:77
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.part.20+0x8a/0xa0 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xf6/0x100 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa00 net/ipv4/ip_output.c:229
 __ip_finish_output+0x11e/0x310 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x1e4/0x5e0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x10/0x20 include/net/ip.h:237
 dccp_transmit_skb+0x268/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:812
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:672