bisecting fixing commit since 1d966eb4d6326a2521073174e9710713e9846e8b
building syzkaller on 56cc113a8ea223321811dcbe8de975e081f5f5b2
testing commit 1d966eb4d6326a2521073174e9710713e9846e8b with gcc (GCC) 8.1.0
kernel signature: 831b832649c322776a2e8e4c2cc6975470511acc4697d2c7ad1d86149d222806
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 c85fb28b6f999db9928b841f63f1beeb3074eeca
testing commit c85fb28b6f999db9928b841f63f1beeb3074eeca with gcc (GCC) 8.1.0
kernel signature: 199878a5ef3e8b368b91f398089fd7622723bc3a21dc748f0f62e147abec3e7c
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: 13m28.624651046s (build: 6m38.677743473s, test: 6m1.942108417s)
the crash still happens on HEAD
commit msg: Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
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:414/tfrc_rx_hist_sample_rtt()
CPU: 1 PID: 4254 Comm: syz-executor5 Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007fc87b9a3c58 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: 00007fc87b9a46d4 R15: 0000000000000002
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 0 PID: 4451 Comm: syz-executor1 Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007f632aa07c58 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: 00007f632aa086d4 R15: 0000000000000002
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 0 PID: 4717 Comm: syz-executor Not tainted 5.9.0-rc8-syzkaller #0
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007ff3da9ffc58 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: 00007ff3daa006d4 R15: 0000000000000002
CPU: 1 PID: 4724 Comm: syz-executor5 Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007fc87b9a3c58 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: 00007fc87b9a46d4 R15: 0000000000000002
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 1 PID: 5132 Comm: syz-executor4 Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [inline]
 ip_local_deliver+0x17f/0x220 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:414/tfrc_rx_hist_sample_rtt()
 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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007f99dc2a2c58 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: 00007f99dc2a36d4 R15: 0000000000000002
CPU: 0 PID: 5156 Comm: syz-executor3 Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007fdbd6c22c58 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: 00007fdbd6c236d4 R15: 0000000000000002
CPU: 1 PID: 5201 Comm: syz-executor1 Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007f632aa07c58 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: 00007f632aa086d4 R15: 0000000000000002
CPU: 0 PID: 5239 Comm: syz-executor5 Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:414/tfrc_rx_hist_sample_rtt()
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007fc87b9a3c58 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: 00007fc87b9a46d4 R15: 0000000000000002
CPU: 1 PID: 5261 Comm: syz-executor Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007ff3da9ffc58 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: 00007ff3daa006d4 R15: 0000000000000002
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 0 PID: 5345 Comm: syz-executor2 Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007febee108c58 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: 00007febee1096d4 R15: 0000000000000002
CPU: 1 PID: 5378 Comm: syz-executor3 Not tainted 5.9.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
net_ratelimit: 327 callbacks suppressed
dccp_close: ABORT with 24 bytes unread
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
dccp_close: ABORT with 24 bytes unread
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
dccp_close: ABORT with 24 bytes unread
dccp_close: ABORT with 24 bytes unread
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
dccp_close: ABORT with 24 bytes unread
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
dccp_close: ABORT with 24 bytes unread
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
dccp_close: ABORT with 24 bytes unread
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138
 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:277
dccp_close: ABORT with 24 bytes unread
 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:359
 dccp_sendmsg+0x225/0x3c0 net/dccp/proto.c:794
dccp_close: ABORT with 24 bytes unread
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
dccp_close: ABORT with 24 bytes unread
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007fdbd6c22c58 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: 00007fdbd6c236d4 R15: 0000000000000002
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 1 PID: 5497 Comm: syz-executor1 Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007f632aa07c58 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: 00007f632aa086d4 R15: 0000000000000002
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 1 PID: 5577 Comm: syz-executor5 Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007fc87b9a3c58 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: 00007fc87b9a46d4 R15: 0000000000000002
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 1 PID: 5944 Comm: syz-executor2 Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [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:414/tfrc_rx_hist_sample_rtt()
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007febee108c58 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: 00007febee1096d4 R15: 0000000000000002
CPU: 0 PID: 5980 Comm: syz-executor3 Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007fdbd6c22c58 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: 00007fdbd6c236d4 R15: 0000000000000002
CPU: 1 PID: 6023 Comm: syz-executor1 Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007f632aa07c58 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: 00007f632aa086d4 R15: 0000000000000002
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 0 PID: 6150 Comm: syz-executor1 Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/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/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007f632aa07c58 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: 00007f632aa086d4 R15: 0000000000000002
CPU: 1 PID: 6191 Comm: syz-executor Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007ff3da9ffc58 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: 00007ff3daa006d4 R15: 0000000000000002
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 1 PID: 6498 Comm: syz-executor2 Not tainted 5.9.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007febee108c58 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: 00007febee1096d4 R15: 0000000000000002
CPU: 0 PID: 6515 Comm: syz-executor1 Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007f632aa07c58 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: 00007f632aa086d4 R15: 0000000000000002
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 1 PID: 6577 Comm: syz-executor3 Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407
 __sys_sendmsg+0x5d/0xb0 net/socket.c:2440
 __do_sys_sendmsg net/socket.c:2449 [inline]
 __se_sys_sendmsg net/socket.c:2447 [inline]
 __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2447
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 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:00007fdbd6c22c58 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: 00007fdbd6c236d4 R15: 0000000000000002
net_ratelimit: 302 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
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 1 PID: 6645 Comm: syz-executor Not tainted 5.9.0-rc8-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+0xa9/0xd1 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x58 net/dccp/ccids/lib/packet_history.c:411
 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:1011 [inline]
 __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:521
dccp_close: ABORT with 24 bytes unread
 dccp_v4_rcv+0x44b/0x81a net/dccp/ipv4.c:878
 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:301 [inline]
 ip_local_deliver+0x17f/0x220 net/ipv4/ip_input.c:252
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:301 [inline]
 ip_rcv+0x15d/0x210 net/ipv4/ip_input.c:539
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:414/tfrc_rx_hist_sample_rtt()
 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5286
 __netif_receive_skb+0x13/0x60 net/core/dev.c:5400
 process_backlog+0x122/0x2d0 net/core/dev.c:6242
 napi_poll net/core/dev.c:6688 [inline]
 net_rx_action+0x187/0x4c0 net/core/dev.c:6758
 __do_softirq+0xd3/0x494 kernel/softirq.c:298
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x51/0x60 arch/x86/kernel/irq_64.c:77
 do_softirq.part.21+0x81/0xa0 kernel/softirq.c:343
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0xfb/0x100 kernel/softirq.c:195
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x24f/0xa20 net/ipv4/ip_output.c:230
 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:307
 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x79/0x250 net/ipv4/ip_output.c:431
 dst_output include/net/dst.h:443 [inline]
 ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126
 __ip_queue_xmit+0x1e4/0x5f0 net/ipv4/ip_output.c:531
 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:545
 dccp_transmit_skb+0x26e/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:794
 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x57/0x60 net/socket.c:671
 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2353
 ___sys_sendmsg+0x77/0xb0 net/socket.c:2407