bisecting fixing commit since 1d966eb4d6326a2521073174e9710713e9846e8b
building syzkaller on 56cc113a8ea223321811dcbe8de975e081f5f5b2
testing commit 1d966eb4d6326a2521073174e9710713e9846e8b with gcc (GCC) 8.1.0
kernel signature: ef93513790bd0b2abde77d52e68f993abee40d25a97025dd245c8bb6c36f655f
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 b3a9e3b9622ae10064826dccb4f7a52bd88c7407
testing commit b3a9e3b9622ae10064826dccb4f7a52bd88c7407 with gcc (GCC) 8.1.0
kernel signature: 792cf9598fa5872c2c84558fee01cbeb4e674c4ba22100a99f945c3d54c416de
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: 15m9.673702004s (build: 8m11.966246536s, test: 6m9.896704745s)
the crash still happens on HEAD
commit msg: Linux 5.8-rc1
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
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: 4012 Comm: syz-executor5 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
dccp_close: ABORT with 24 bytes unread
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
dccp_close: ABORT with 24 bytes unread
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
dccp_close: ABORT with 24 bytes unread
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
dccp_close: ABORT with 24 bytes unread
 __do_softirq+0x248/0x992 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
dccp_close: ABORT with 24 bytes unread
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
dccp_close: ABORT with 24 bytes unread
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
dccp_close: ABORT with 24 bytes unread
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
dccp_close: ABORT with 24 bytes unread
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007fa882c97c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fa882c986d4 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: 4080 Comm: syz-executor5 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
 __do_softirq+0x248/0x992 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007fa882c97c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fa882c986d4 R15: 0000000000000002
CPU: 1 PID: 4083 Comm: syz-executor4 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 __do_softirq+0x248/0x992 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007f73b3819c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f73b381a6d4 R15: 0000000000000002
CPU: 0 PID: 4100 Comm: syz-executor5 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
 __do_softirq+0x248/0x992 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007fa882c97c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fa882c986d4 R15: 0000000000000002
CPU: 1 PID: 4122 Comm: syz-executor4 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
 __do_softirq+0x248/0x992 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007f73b3819c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f73b381a6d4 R15: 0000000000000001
CPU: 0 PID: 4146 Comm: syz-executor3 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
 __do_softirq+0x248/0x992 kernel/softirq.c:292
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()
 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007fd73c1a7c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fd73c1a86d4 R15: 0000000000000002
CPU: 1 PID: 4173 Comm: syz-executor1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c: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+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
 __do_softirq+0x248/0x992 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007fdacbdfdc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fdacbdfe6d4 R15: 0000000000000002
CPU: 0 PID: 4192 Comm: syz-executor3 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
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()
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
 __do_softirq+0x248/0x992 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007fd73c1a7c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fd73c1a86d4 R15: 0000000000000002
CPU: 1 PID: 4190 Comm: syz-executor4 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
 __do_softirq+0x248/0x992 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007f73b3819c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f73b381a6d4 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: 4231 Comm: syz-executor2 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
net_ratelimit: 35 callbacks suppressed
dccp_close: ABORT with 24 bytes unread
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c: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+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
 __do_softirq+0x248/0x992 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007f003160bc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f003160c6d4 R15: 0000000000000002
CPU: 1 PID: 4249 Comm: syz-executor1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
 __do_softirq+0x248/0x992 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007fdacbdfdc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fdacbdfe6d4 R15: 0000000000000002
CPU: 0 PID: 4260 Comm: syz-executor5 Not tainted 5.8.0-rc1-syzkaller #0
dccp_close: ABORT with 24 bytes unread
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
dccp_close: ABORT with 24 bytes unread
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
dccp_close: ABORT with 24 bytes unread
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
dccp_close: ABORT with 24 bytes unread
 __do_softirq+0x248/0x992 kernel/softirq.c:292
dccp_close: ABORT with 24 bytes unread
 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
dccp_close: ABORT with 24 bytes unread
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007fa882c97c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fa882c986d4 R15: 0000000000000002
CPU: 1 PID: 4297 Comm: syz-executor4 Not tainted 5.8.0-rc1-syzkaller #0
dccp_close: ABORT with 24 bytes unread
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
dccp_close: ABORT with 24 bytes unread
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
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()
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
 __do_softirq+0x248/0x992 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007f73b3819c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f73b381a6d4 R15: 0000000000000002
CPU: 0 PID: 4298 Comm: syz-executor3 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
 __do_softirq+0x248/0x992 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007fd73c186c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071c010 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fd73c1876d4 R15: 0000000000000008
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: 4317 Comm: syz-executor3 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 __do_softirq+0x248/0x992 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007fd73c1a7c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fd73c1a86d4 R15: 0000000000000002
CPU: 1 PID: 4342 Comm: syz-executor1 Not tainted 5.8.0-rc1-syzkaller #0
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
 __do_softirq+0x248/0x992 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007fdacbdfdc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fdacbdfe6d4 R15: 0000000000000002
CPU: 0 PID: 4341 Comm: syz-executor2 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
 __do_softirq+0x248/0x992 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007f003160bc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007f003160c6d4 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: 16 Comm: ksoftirqd/1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt()
 __do_softirq+0x248/0x992 kernel/softirq.c:292
 run_ksoftirqd+0x88/0x100 kernel/softirq.c:630
 smpboot_thread_fn+0x342/0x790 kernel/smpboot.c:165
 kthread+0x370/0x440 kernel/kthread.c:291
 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:293
CPU: 0 PID: 4376 Comm: syz-executor1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
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()
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core+0x16a/0x1c0 net/core/dev.c:5279
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5393
 process_backlog+0x1f1/0x700 net/core/dev.c:6237
 napi_poll net/core/dev.c:6682 [inline]
 net_rx_action+0x44c/0xe60 net/core/dev.c:6750
 __do_softirq+0x248/0x992 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+0xf2/0x140 arch/x86/kernel/irq_64.c:77
 do_softirq.part.18+0x11a/0x150 kernel/softirq.c:337
 do_softirq arch/x86/include/asm/preempt.h:26 [inline]
 __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x718/0x21f0 net/ipv4/ip_output.c:229
 __ip_finish_output+0x401/0xa70 net/ipv4/ip_output.c:306
 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x1c6/0x560 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:435 [inline]
 ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x700/0x1de0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x45/0x70 include/net/ip.h:237
 dccp_transmit_skb+0xb80/0x12b0 net/dccp/output.c:138
 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277
 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359
 dccp_sendmsg+0x68e/0xdb0 net/dccp/proto.c:812
 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:814
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xdf/0x110 net/socket.c:672
 ____sys_sendmsg+0x6b4/0xb40 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xdc/0x190 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg net/socket.c:2446 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2446
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x452f89
Code: Bad RIP value.
RSP: 002b:00007fdacbdfdc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
R13: 00000000ffffffff R14: 00007fdacbdfe6d4 R15: 0000000000000002
CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x136/0x187 lib/dump_stack.c:118
 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409
 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176
 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374
 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x215/0x900 net/core/sock.c:519
 dccp_v4_rcv+0xc62/0x1da3 net/dccp/ipv4.c:876
 ip_protocol_deliver_rcu+0x516/0x6c0 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:441 [inline]
 ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:539