bisecting fixing commit since 1d966eb4d6326a2521073174e9710713e9846e8b building syzkaller on 56cc113a8ea223321811dcbe8de975e081f5f5b2 testing commit 1d966eb4d6326a2521073174e9710713e9846e8b with gcc (GCC) 8.1.0 kernel signature: d4557e6440259f259775e1b9fa7eed21863759790f4a43c1dde2a6fcdbf1a4a4 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 71c061d2443814de15e177489d5cc00a4a253ef3 testing commit 71c061d2443814de15e177489d5cc00a4a253ef3 with gcc (GCC) 8.1.0 kernel signature: 5c7b909fffa4213a2f25140533c4e0598f72313df54ed9b6ebdad6e90175e49c 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: 12m49.974311945s (build: 6m47.296819495s, test: 5m18.882570877s) the crash still happens on HEAD commit msg: Merge tag 'for-5.11-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/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 audit: type=1400 audit(1610027806.859:14): avc: denied { write } for pid=4042 comm="syz-executor1" path="socket:[15122]" dev="sockfs" ino=15122 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1 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:417/tfrc_rx_hist_sample_rtt() CPU: 0 PID: 4176 Comm: syz-executor2 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f38c698fc58 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: 00007f38c69906d4 R15: 0000000000000002 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() CPU: 1 PID: 4236 Comm: syz-executor5 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f10e5170c58 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: 00007f10e51716d4 R15: 0000000000000002 CPU: 0 PID: 4243 Comm: syz-executor3 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 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:417/tfrc_rx_hist_sample_rtt() __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f3daa622c58 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: 00007f3daa6236d4 R15: 0000000000000002 CPU: 1 PID: 4269 Comm: syz-executor4 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f4c7f24cc58 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: 00007f4c7f24d6d4 R15: 0000000000000002 CPU: 0 PID: 4294 Comm: syz-executor1 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 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:417/tfrc_rx_hist_sample_rtt() __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007fe0d0b46c58 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: 00007fe0d0b476d4 R15: 0000000000000002 CPU: 1 PID: 4321 Comm: syz-executor Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f35c084ec58 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: 00007f35c084f6d4 R15: 0000000000000002 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() CPU: 0 PID: 4425 Comm: syz-executor4 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f4c7f24cc58 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: 00007f4c7f24d6d4 R15: 0000000000000002 CPU: 1 PID: 4447 Comm: syz-executor5 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f10e5170c58 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: 00007f10e51716d4 R15: 0000000000000002 CPU: 0 PID: 4488 Comm: syz-executor3 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f3daa622c58 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: 00007f3daa6236d4 R15: 0000000000000002 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() CPU: 1 PID: 4597 Comm: syz-executor1 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007fe0d0b46c58 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: 00007fe0d0b476d4 R15: 0000000000000002 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() CPU: 0 PID: 4830 Comm: syz-executor5 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f10e5170c58 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: 00007f10e51716d4 R15: 0000000000000002 net_ratelimit: 232 callbacks suppressed dccp_close: ABORT with 24 bytes unread dccp_close: ABORT with 24 bytes unread dccp_close: ABORT with 24 bytes unread dccp_close: ABORT with 24 bytes unread dccp_close: ABORT with 24 bytes unread dccp_close: ABORT with 24 bytes unread dccp_close: ABORT with 24 bytes unread dccp_close: ABORT with 24 bytes unread dccp_close: ABORT with 24 bytes unread dccp_close: ABORT with 24 bytes unread BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() CPU: 1 PID: 5198 Comm: syz-executor1 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007fe0d0b46c58 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: 00007fe0d0b476d4 R15: 0000000000000002 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() CPU: 1 PID: 5290 Comm: syz-executor Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f35c084ec58 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: 00007f35c084f6d4 R15: 0000000000000002 CPU: 0 PID: 5313 Comm: syz-executor1 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007fe0d0b46c58 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: 00007fe0d0b476d4 R15: 0000000000000002 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() CPU: 1 PID: 5375 Comm: syz-executor5 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f10e5170c58 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: 00007f10e51716d4 R15: 0000000000000004 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() CPU: 1 PID: 5489 Comm: syz-executor Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f35c084ec58 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: 00007f35c084f6d4 R15: 0000000000000008 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() CPU: 0 PID: 5683 Comm: syz-executor4 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f4c7f24cc58 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: 00007f4c7f24d6d4 R15: 0000000000000002 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() CPU: 0 PID: 5877 Comm: syz-executor3 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f3daa622c58 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: 00007f3daa6236d4 R15: 0000000000000002 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() CPU: 0 PID: 6045 Comm: syz-executor5 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f10e5170c58 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: 00007f10e51716d4 R15: 0000000000000004 CPU: 1 PID: 6068 Comm: syz-executor4 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f4c7f24cc58 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: 00007f4c7f24d6d4 R15: 0000000000000002 CPU: 0 PID: 6103 Comm: syz-executor2 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007f38c698fc58 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: 00007f38c69906d4 R15: 0000000000000002 CPU: 1 PID: 6137 Comm: syz-executor1 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 __do_softirq+0xdc/0x452 kernel/softirq.c:343 asm_call_irq_on_stack+0x12/0x20 __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt() do_softirq+0x75/0xb0 kernel/softirq.c:246 __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0x3a/0x60 net/ipv4/ip_output.c:126 __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x1a/0x20 net/socket.c:2439 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:00007fe0d0b46c58 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: 00007fe0d0b476d4 R15: 0000000000000002 CPU: 0 PID: 6175 Comm: syz-executor2 Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 net_ratelimit: 267 callbacks suppressed dccp_close: ABORT with 24 bytes unread Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa9/0xd1 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt.cold.3+0x27/0x4b net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0xde/0x3b0 net/dccp/ccids/ccid3.c:760 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:657 dccp_close: ABORT with 24 bytes unread sk_backlog_rcv include/net/sock.h:1016 [inline] __sk_receive_skb+0xcc/0x2b0 net/core/sock.c:509 dccp_v4_rcv+0x44b/0x820 net/dccp/ipv4.c:880 ip_protocol_deliver_rcu+0x224/0x270 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x8d/0x130 net/ipv4/ip_input.c:231 dccp_close: ABORT with 24 bytes unread NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x184/0x220 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:447 [inline] ip_rcv_finish+0x3d/0x60 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0x162/0x210 net/ipv4/ip_input.c:539 dccp_close: ABORT with 24 bytes unread __netif_receive_skb_one_core+0x81/0x90 net/core/dev.c:5323 __netif_receive_skb+0x13/0x60 net/core/dev.c:5437 process_backlog+0x122/0x2d0 net/core/dev.c:6327 napi_poll net/core/dev.c:6805 [inline] net_rx_action+0x17d/0x4f0 net/core/dev.c:6888 dccp_close: ABORT with 24 bytes unread __do_softirq+0xdc/0x452 kernel/softirq.c:343 dccp_close: ABORT with 24 bytes unread dccp_close: ABORT with 24 bytes unread asm_call_irq_on_stack+0x12/0x20 dccp_close: ABORT with 24 bytes unread __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+0x5c/0x70 arch/x86/kernel/irq_64.c:77 do_softirq+0x75/0xb0 kernel/softirq.c:246 dccp_close: ABORT with 24 bytes unread __local_bh_enable_ip+0x10a/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:737 [inline] ip_finish_output2+0x24f/0xa10 net/ipv4/ip_output.c:231 __ip_finish_output+0x11e/0x340 net/ipv4/ip_output.c:308 dccp_close: ABORT with 24 bytes unread ip_finish_output+0x27/0xa0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x79/0x260 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [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:417/tfrc_rx_hist_sample_rtt() __ip_queue_xmit+0x1e4/0x600 net/ipv4/ip_output.c:532 ip_queue_xmit+0x10/0x20 net/ipv4/ip_output.c:546 dccp_transmit_skb+0x26e/0x420 net/dccp/output.c:138 dccp_xmit_packet+0x70/0x170 net/dccp/output.c:281 dccp_write_xmit+0x8d/0xb0 net/dccp/output.c:366 dccp_sendmsg+0x225/0x3a0 net/dccp/proto.c:794 inet_sendmsg+0x5f/0x70 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0x57/0x60 net/socket.c:672 ____sys_sendmsg+0x1fc/0x270 net/socket.c:2345 ___sys_sendmsg+0x77/0xb0 net/socket.c:2399 __sys_sendmsg+0x5d/0xb0 net/socket.c:2432