bisecting fixing commit since 1d966eb4d6326a2521073174e9710713e9846e8b building syzkaller on 56cc113a8ea223321811dcbe8de975e081f5f5b2 testing commit 1d966eb4d6326a2521073174e9710713e9846e8b with gcc (GCC) 8.1.0 kernel signature: bde2d4f088db92c3f191fcfd4366a5c0526b9cdd 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 6794862a16ef41f753abd75c03a152836e4c8028 testing commit 6794862a16ef41f753abd75c03a152836e4c8028 with gcc (GCC) 8.1.0 kernel signature: 74d3ac32fcd66bc30bb8747a898c7e82bae8774d 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: 14m31.175893194s (build: 7m44.354473093s, test: 6m6.533691842s) the crash still happens on HEAD commit msg: Merge tag 'for-5.5-rc1-kconfig-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 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: 4772 Comm: syz-executor1 Not tainted 5.5.0-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+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655 sk_backlog_rcv include/net/sock.h:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dccp_close: ABORT with 24 bytes unread dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 dccp_close: ABORT with 24 bytes unread __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 dccp_close: ABORT with 24 bytes unread napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 dccp_close: ABORT with 24 bytes unread __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt() do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f549c3cdc58 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: 00007f549c3ce6d4 R15: 0000000000000002 CPU: 1 PID: 4806 Comm: syz-executor4 Not tainted 5.5.0-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+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 dccp_close: ABORT with 24 bytes unread 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:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt() dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff96910dc58 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: 00007ff96910e6d4 R15: 0000000000000002 CPU: 0 PID: 4813 Comm: syz-executor Not tainted 5.5.0-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+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 dccp_close: ABORT with 24 bytes unread 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:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_close: ABORT with 24 bytes unread dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dccp_close: ABORT with 24 bytes unread dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt() __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fcdd0c13c58 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: 00007fcdd0c146d4 R15: 0000000000000002 CPU: 1 PID: 4827 Comm: syz-executor5 Not tainted 5.5.0-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: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 dccp_close: ABORT with 24 bytes unread 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:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 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:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f89cb08ec58 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: 00007f89cb08f6d4 R15: 0000000000000002 CPU: 0 PID: 4844 Comm: syz-executor1 Not tainted 5.5.0-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: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655 sk_backlog_rcv include/net/sock.h:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f549c3cdc58 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: 00007f549c3ce6d4 R15: 0000000000000002 CPU: 1 PID: 4843 Comm: syz-executor Not tainted 5.5.0-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+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655 sk_backlog_rcv include/net/sock.h:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fcdd0c13c58 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: 00007fcdd0c146d4 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: 9 Comm: ksoftirqd/0 Not tainted 5.5.0-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+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt() dccp_rcv_established+0x49/0x70 net/dccp/input.c:374 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655 sk_backlog_rcv include/net/sock.h:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 run_ksoftirqd+0x88/0x100 kernel/softirq.c:603 smpboot_thread_fn+0x342/0x790 kernel/smpboot.c:165 kthread+0x334/0x3f0 kernel/kthread.c:255 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 CPU: 1 PID: 4874 Comm: syz-executor2 Not tainted 5.5.0-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+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655 sk_backlog_rcv include/net/sock.h:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 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_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2c64d74c58 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: 00007f2c64d756d4 R15: 0000000000000002 CPU: 0 PID: 4909 Comm: syz-executor Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt() __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655 sk_backlog_rcv include/net/sock.h:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fcdd0c13c58 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: 00007fcdd0c146d4 R15: 0000000000000002 CPU: 1 PID: 4910 Comm: syz-executor1 Not tainted 5.5.0-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+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655 sk_backlog_rcv include/net/sock.h:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f549c3cdc58 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: 00007f549c3ce6d4 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() 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: 4925 Comm: syz-executor4 Not tainted 5.5.0-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+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655 sk_backlog_rcv include/net/sock.h:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff96910dc58 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: 00007ff96910e6d4 R15: 0000000000000002 CPU: 1 PID: 4931 Comm: syz-executor3 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 net_ratelimit: 29 callbacks suppressed dccp_close: ABORT with 24 bytes unread Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655 sk_backlog_rcv include/net/sock.h:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_close: ABORT with 24 bytes unread dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 dccp_close: ABORT with 24 bytes unread ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 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:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 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:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa686c7bc58 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: 00007fa686c7c6d4 R15: 0000000000000002 CPU: 0 PID: 4949 Comm: syz-executor4 Not tainted 5.5.0-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: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655 sk_backlog_rcv include/net/sock.h:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff96910dc58 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: 00007ff96910e6d4 R15: 0000000000000002 CPU: 1 PID: 4950 Comm: syz-executor Not tainted 5.5.0-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+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655 sk_backlog_rcv include/net/sock.h:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fcdd0c13c58 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: 00007fcdd0c146d4 R15: 0000000000000002 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 578 bytes unread dccp_close: ABORT with 578 bytes unread BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt() CPU: 1 PID: 4969 Comm: syz-executor Not tainted 5.5.0-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+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655 sk_backlog_rcv include/net/sock.h:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 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:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fcdd0c13c58 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: 00007fcdd0c146d4 R15: 0000000000000002 CPU: 0 PID: 5001 Comm: syz-executor2 Not tainted 5.5.0-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+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt() ccid3_hc_rx_packet_recv+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:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2c64d74c58 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: 00007f2c64d756d4 R15: 0000000000000002 CPU: 1 PID: 5006 Comm: syz-executor1 Not tainted 5.5.0-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+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655 sk_backlog_rcv include/net/sock.h:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:412/tfrc_rx_hist_sample_rtt() dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f549c3cdc58 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: 00007f549c3ce6d4 R15: 0000000000000002 CPU: 0 PID: 5018 Comm: syz-executor Not tainted 5.5.0-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: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655 sk_backlog_rcv include/net/sock.h:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fcdd0c13c58 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: 00007fcdd0c146d4 R15: 0000000000000002 CPU: 1 PID: 5019 Comm: syz-executor2 Not tainted 5.5.0-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+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655 sk_backlog_rcv include/net/sock.h:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5264 process_backlog+0x1cb/0x6d0 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x42d/0xde0 net/core/dev.c:6600 __do_softirq+0x248/0x94c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.17+0x11a/0x150 kernel/softirq.c:337 do_softirq arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:706 [inline] ip_finish_output2+0x72d/0x22a0 net/ipv4/ip_output.c:229 __ip_finish_output+0x401/0xa50 net/ipv4/ip_output.c:308 ip_finish_output+0x27/0x170 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1c6/0x560 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x7e/0x130 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x6f6/0x1de0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x70 include/net/ip.h:237 dccp_transmit_skb+0xb76/0x12a0 net/dccp/output.c:138 dccp_xmit_packet+0x1a0/0x580 net/dccp/output.c:277 dccp_write_xmit+0x128/0x180 net/dccp/output.c:359 dccp_sendmsg+0x68f/0xdb0 net/dccp/proto.c:812 inet_sendmsg+0xbd/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xdf/0x110 net/socket.c:659 ____sys_sendmsg+0x687/0xae0 net/socket.c:2330 ___sys_sendmsg+0xe4/0x160 net/socket.c:2384 __sys_sendmsg+0xd9/0x180 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2424 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x452f89 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2c64d74c58 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: 00007f2c64d756d4 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() 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: 5036 Comm: syz-executor Not tainted 5.5.0-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+0x12f/0x187 lib/dump_stack.c:118 tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c net/dccp/ccids/lib/packet_history.c:409 ccid3_hc_rx_packet_recv+0x471/0xec0 net/dccp/ccids/ccid3.c:754 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xcc/0x220 net/dccp/input.c:176 dccp_rcv_established+0x49/0x70 net/dccp/input.c:374 dccp_v4_do_rcv+0xf4/0x160 net/dccp/ipv4.c:655 sk_backlog_rcv include/net/sock.h:949 [inline] __sk_receive_skb+0x2b6/0x9e0 net/core/sock.c:519 dccp_v4_rcv+0xc22/0x1c0b net/dccp/ipv4.c:876 ip_protocol_deliver_rcu+0x50b/0x6b0 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x1ee/0x2e0 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x306/0x450 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0xb0/0x170 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xcb/0x2f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x132/0x190 net/core/dev.c:5150