[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   40.730060] can: request_module (can-proto-0) failed.
[   40.734695] can: request_module (can-proto-0) failed.
[   42.037036] tipc: TX() has been purged, node left!
Warning: Permanently added '10.128.1.56' (ECDSA) to the list of known hosts.
2020/01/13 01:49:13 parsed 1 programs
2020/01/13 01:49:13 executed programs: 0
[   50.844583] 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()
[   50.858016] CPU: 1 PID: 4788 Comm: syz-executor3 Not tainted 5.5.0-rc6-syzkaller #0
[   50.865836] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   50.867690] dccp_close: ABORT with 24 bytes unread
[   50.875189] Call Trace:
[   50.875199]  <IRQ>
[   50.875211]  dump_stack+0x12f/0x187
[   50.875231]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   50.875246]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   50.898554]  ? dccp_parse_options+0x333/0x1000
[   50.903172]  dccp_deliver_input_to_ccids+0xcc/0x220
[   50.908204]  dccp_rcv_established+0x49/0x70
[   50.912531]  dccp_v4_do_rcv+0xf4/0x160
[   50.916469]  __sk_receive_skb+0x2b6/0x9e0
[   50.920643]  ? sk_free+0x60/0x60
[   50.924007]  ? dccp_invalid_packet+0x3ec/0x750
[   50.928599]  dccp_v4_rcv+0xc22/0x1c0b
[   50.932428]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   50.937216]  ip_local_deliver_finish+0x1ee/0x2e0
[   50.941976]  ip_local_deliver+0x306/0x450
[   50.946129]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   50.951068]  ? lock_downgrade+0x900/0x900
[   50.954807] dccp_close: ABORT with 24 bytes unread
[   50.955217]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   50.955240]  ip_rcv_finish+0xb0/0x170
[   50.955251]  ip_rcv+0xcb/0x2f0
[   50.955262]  ? ip_local_deliver+0x450/0x450
[   50.955275]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   50.979650] dccp_close: ABORT with 24 bytes unread
[   50.982197]  ? ip_local_deliver+0x450/0x450
[   50.982209]  __netif_receive_skb_one_core+0x132/0x190
[   50.982219]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   50.982233]  ? lock_acquire+0x194/0x3e0
[   50.982239]  ? process_backlog+0x182/0x6d0
[   50.982251]  __netif_receive_skb+0x1f/0x1b0
[   50.999191] dccp_close: ABORT with 24 bytes unread
[   51.001871]  process_backlog+0x1cb/0x6d0
[   51.001878]  ? __do_softirq+0x248/0x94c
[   51.001888]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   51.001908]  net_rx_action+0x42d/0xde0
[   51.001919]  ? mark_lock+0xc5/0x1200
[   51.001933]  ? napi_busy_loop+0x6e0/0x6e0
[   51.032581] dccp_close: ABORT with 24 bytes unread
[   51.035922]  ? rcu_is_watching+0x31/0x80
[   51.035939]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   51.035948]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   51.035954]  ? __do_softirq+0x1d9/0x94c
[   51.035959]  ? ip_finish_output2+0x709/0x22a0
[   51.035966]  ? trace_hardirqs_on+0x28/0x180
[   51.035979]  __do_softirq+0x248/0x94c
[   51.035996]  ? ip_finish_output2+0x709/0x22a0
[   51.047828] 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()
[   51.048764]  do_softirq_own_stack+0x2a/0x40
[   51.048769]  </IRQ>
[   51.048779]  do_softirq.part.17+0x11a/0x150
[   51.048788]  __local_bh_enable_ip+0x1ee/0x230
[   51.048799]  ip_finish_output2+0x72d/0x22a0
[   51.048819]  ? ip_frag_next+0xa10/0xa10
[   51.120927]  ? rcu_read_lock_held+0x9c/0xb0
[   51.125255]  ? rcu_read_lock_held_common+0x170/0x170
[   51.130346]  __ip_finish_output+0x401/0xa50
[   51.134650]  ? __ip_finish_output+0x401/0xa50
[   51.139138]  ip_finish_output+0x27/0x170
[   51.143184]  ip_output+0x1c6/0x560
[   51.146709]  ? ip_mc_output+0xd10/0xd10
[   51.150667]  ? __ip_finish_output+0xa50/0xa50
[   51.155156]  ? rcu_read_lock_held_common+0x170/0x170
[   51.160255]  ? rcu_read_lock_held+0x9c/0xb0
[   51.164575]  ip_local_out+0x7e/0x130
[   51.168273]  __ip_queue_xmit+0x6f6/0x1de0
[   51.172403]  ? __skb_checksum+0x7c0/0x7c0
[   51.176544]  ? skb_send_sock_locked+0x750/0x750
[   51.181191]  ? reqsk_fastopen_remove+0x560/0x560
[   51.185927]  ? dccp_insert_options+0x1e2/0xb20
[   51.190502]  ip_queue_xmit+0x45/0x70
[   51.194211]  dccp_transmit_skb+0xb76/0x12a0
[   51.198524]  dccp_xmit_packet+0x1a0/0x580
[   51.202658]  dccp_write_xmit+0x128/0x180
[   51.206705]  dccp_sendmsg+0x68f/0xdb0
[   51.210490]  ? aa_sk_perm+0x182/0x740
[   51.214305]  ? dccp_disconnect+0xa90/0xa90
[   51.218522]  ? aa_af_perm+0x240/0x240
[   51.222323]  inet_sendmsg+0xbd/0xe0
[   51.225933]  ? inet_send_prepare+0x3a0/0x3a0
[   51.230329]  sock_sendmsg+0xdf/0x110
[   51.234028]  ____sys_sendmsg+0x687/0xae0
[   51.238069]  ? copy_msghdr_from_user+0x20d/0x3f0
[   51.242810]  ? kernel_sendmsg+0x30/0x30
[   51.246768]  ? __fget+0x2ae/0x440
[   51.250214]  ___sys_sendmsg+0xe4/0x160
[   51.254085]  ? sendmsg_copy_msghdr+0x30/0x30
[   51.258475]  ? rcu_read_lock_held+0x9c/0xb0
[   51.262790]  ? rcu_read_lock_held_common+0x170/0x170
[   51.267882]  ? __fget+0x2c8/0x440
[   51.271760]  ? __x64_sys_dup2+0x2e0/0x2e0
[   51.275901]  ? lock_downgrade+0x900/0x900
[   51.280053]  ? __fget_light+0x17f/0x1f0
[   51.284018]  ? __fdget+0xe/0x10
[   51.287288]  __sys_sendmsg+0xd9/0x180
[   51.291073]  ? __sys_sendmsg_sock+0xa0/0xa0
[   51.295384]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   51.300641]  ? __sched_text_start+0x8/0x8
[   51.304784]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   51.310135]  __x64_sys_sendmsg+0x73/0xb0
[   51.314194]  do_syscall_64+0xd0/0x600
[   51.317982]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   51.323166] RIP: 0033:0x452f89
[   51.326344] 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
[   51.345226] RSP: 002b:00007f333aedcc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   51.353182] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   51.360448] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   51.367706] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   51.374978] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   51.382321] R13: 00000000ffffffff R14: 00007f333aedd6d4 R15: 0000000000000002
[   51.389607] CPU: 0 PID: 4818 Comm: syz-executor1 Not tainted 5.5.0-rc6-syzkaller #0
[   51.397414] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.406780] Call Trace:
[   51.409383]  <IRQ>
[   51.411537]  dump_stack+0x12f/0x187
[   51.412622] dccp_close: ABORT with 24 bytes unread
[   51.415167]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   51.415182]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   51.415189]  ? dccp_parse_options+0x333/0x1000
[   51.415206]  dccp_deliver_input_to_ccids+0xcc/0x220
[   51.429437] dccp_close: ABORT with 24 bytes unread
[   51.430181]  dccp_rcv_established+0x49/0x70
[   51.430192]  dccp_v4_do_rcv+0xf4/0x160
[   51.430205]  __sk_receive_skb+0x2b6/0x9e0
[   51.430221]  ? sk_free+0x60/0x60
[   51.430229]  ? dccp_invalid_packet+0x3ec/0x750
[   51.451899] 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()
[   51.453723]  dccp_v4_rcv+0xc22/0x1c0b
[   51.453760]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   51.453780]  ip_local_deliver_finish+0x1ee/0x2e0
[   51.453794]  ip_local_deliver+0x306/0x450
[   51.496461]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   51.501389]  ? lock_downgrade+0x900/0x900
[   51.505629]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   51.510695]  ip_rcv_finish+0xb0/0x170
[   51.514494]  ip_rcv+0xcb/0x2f0
[   51.517675]  ? ip_local_deliver+0x450/0x450
[   51.522008]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   51.527364]  ? ip_local_deliver+0x450/0x450
[   51.531761]  __netif_receive_skb_one_core+0x132/0x190
[   51.536955]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   51.542142]  ? lock_acquire+0x194/0x3e0
[   51.546102]  ? process_backlog+0x182/0x6d0
[   51.550337]  __netif_receive_skb+0x1f/0x1b0
[   51.554648]  process_backlog+0x1cb/0x6d0
[   51.558711]  ? __do_softirq+0x248/0x94c
[   51.562757]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   51.567439]  net_rx_action+0x42d/0xde0
[   51.571319]  ? mark_lock+0xc5/0x1200
[   51.575021]  ? napi_busy_loop+0x6e0/0x6e0
[   51.579163]  ? rcu_is_watching+0x31/0x80
[   51.583212]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   51.588051]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   51.593306]  ? __do_softirq+0x1d9/0x94c
[   51.597262]  ? ip_finish_output2+0x709/0x22a0
[   51.601740]  ? trace_hardirqs_on+0x28/0x180
[   51.606052]  __do_softirq+0x248/0x94c
[   51.609860]  ? ip_finish_output2+0x709/0x22a0
[   51.614351]  do_softirq_own_stack+0x2a/0x40
[   51.618667]  </IRQ>
[   51.620887]  do_softirq.part.17+0x11a/0x150
[   51.625196]  __local_bh_enable_ip+0x1ee/0x230
[   51.629682]  ip_finish_output2+0x72d/0x22a0
[   51.633997]  ? ip_frag_next+0xa10/0xa10
[   51.637957]  ? rcu_read_lock_held+0x9c/0xb0
[   51.642272]  ? rcu_read_lock_held_common+0x170/0x170
[   51.647490]  __ip_finish_output+0x401/0xa50
[   51.651807]  ? __ip_finish_output+0x401/0xa50
[   51.656312]  ip_finish_output+0x27/0x170
[   51.660373]  ip_output+0x1c6/0x560
[   51.663908]  ? ip_mc_output+0xd10/0xd10
[   51.667875]  ? __ip_finish_output+0xa50/0xa50
[   51.672377]  ? rcu_read_lock_held_common+0x170/0x170
[   51.677469]  ? rcu_read_lock_held+0x9c/0xb0
[   51.681798]  ip_local_out+0x7e/0x130
[   51.685501]  __ip_queue_xmit+0x6f6/0x1de0
[   51.689631]  ? __skb_checksum+0x7c0/0x7c0
[   51.693765]  ? skb_send_sock_locked+0x750/0x750
[   51.698418]  ? reqsk_fastopen_remove+0x560/0x560
[   51.703156]  ? dccp_insert_options+0x1e2/0xb20
[   51.707730]  ip_queue_xmit+0x45/0x70
[   51.711428]  dccp_transmit_skb+0xb76/0x12a0
[   51.715743]  dccp_xmit_packet+0x1a0/0x580
[   51.719878]  dccp_write_xmit+0x128/0x180
[   51.723931]  dccp_sendmsg+0x68f/0xdb0
[   51.727733]  ? aa_sk_perm+0x182/0x740
[   51.731519]  ? dccp_disconnect+0xa90/0xa90
[   51.735739]  ? aa_af_perm+0x240/0x240
[   51.739574]  inet_sendmsg+0xbd/0xe0
[   51.743200]  ? inet_send_prepare+0x3a0/0x3a0
[   51.747726]  sock_sendmsg+0xdf/0x110
[   51.751430]  ____sys_sendmsg+0x687/0xae0
[   51.755485]  ? copy_msghdr_from_user+0x20d/0x3f0
[   51.760235]  ? kernel_sendmsg+0x30/0x30
[   51.764201]  ? __fget+0x2ae/0x440
[   51.767647]  ___sys_sendmsg+0xe4/0x160
[   51.771521]  ? sendmsg_copy_msghdr+0x30/0x30
[   51.775916]  ? rcu_read_lock_held+0x9c/0xb0
[   51.780221]  ? rcu_read_lock_held_common+0x170/0x170
[   51.785315]  ? __fget+0x2c8/0x440
[   51.788761]  ? __x64_sys_dup2+0x2e0/0x2e0
[   51.792897]  ? lock_downgrade+0x900/0x900
[   51.797050]  ? __fget_light+0x17f/0x1f0
[   51.801034]  ? __fdget+0xe/0x10
[   51.804305]  __sys_sendmsg+0xd9/0x180
[   51.808089]  ? __sys_sendmsg_sock+0xa0/0xa0
[   51.812405]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   51.817674]  ? __sched_text_start+0x8/0x8
[   51.821818]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   51.827186]  __x64_sys_sendmsg+0x73/0xb0
[   51.831245]  do_syscall_64+0xd0/0x600
[   51.835036]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   51.840209] RIP: 0033:0x452f89
[   51.843402] 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
[   51.862286] RSP: 002b:00007fc466345c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   51.869988] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   51.877259] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   51.884520] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   51.891786] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   51.899052] R13: 00000000ffffffff R14: 00007fc4663466d4 R15: 0000000000000002
[   51.906337] CPU: 1 PID: 4826 Comm: syz-executor5 Not tainted 5.5.0-rc6-syzkaller #0
[   51.914134] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.923485] Call Trace:
[   51.926063]  <IRQ>
[   51.928211]  dump_stack+0x12f/0x187
[   51.931872]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   51.937079]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   51.941837]  ? dccp_parse_options+0x333/0x1000
[   51.946440]  dccp_deliver_input_to_ccids+0xcc/0x220
[   51.951355] dccp_close: ABORT with 24 bytes unread
[   51.951462]  dccp_rcv_established+0x49/0x70
[   51.960721]  dccp_v4_do_rcv+0xf4/0x160
[   51.964616]  __sk_receive_skb+0x2b6/0x9e0
[   51.968767]  ? sk_free+0x60/0x60
[   51.971561] dccp_close: ABORT with 24 bytes unread
[   51.972127]  ? dccp_invalid_packet+0x3ec/0x750
[   51.972148]  dccp_v4_rcv+0xc22/0x1c0b
[   51.972181]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   51.990225]  ip_local_deliver_finish+0x1ee/0x2e0
[   51.992170] dccp_close: ABORT with 24 bytes unread
[   51.994982]  ip_local_deliver+0x306/0x450
[   51.994993]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   51.995000]  ? lock_downgrade+0x900/0x900
[   51.995011]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   51.995029]  ip_rcv_finish+0xb0/0x170
[   52.022266]  ip_rcv+0xcb/0x2f0
[   52.026080]  ? ip_local_deliver+0x450/0x450
[   52.030408]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   52.035788]  ? ip_local_deliver+0x450/0x450
[   52.040125]  __netif_receive_skb_one_core+0x132/0x190
[   52.045323]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   52.050539]  ? lock_acquire+0x194/0x3e0
[   52.054508]  ? process_backlog+0x182/0x6d0
[   52.058758]  __netif_receive_skb+0x1f/0x1b0
[   52.063083]  process_backlog+0x1cb/0x6d0
[   52.067141]  ? __do_softirq+0x248/0x94c
[   52.071116]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   52.075709]  net_rx_action+0x42d/0xde0
[   52.079691]  ? mark_lock+0xc5/0x1200
[   52.083461]  ? napi_busy_loop+0x6e0/0x6e0
[   52.087620]  ? rcu_is_watching+0x31/0x80
[   52.087997] 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()
[   52.091695]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   52.091703]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   52.091709]  ? __do_softirq+0x1d9/0x94c
[   52.091715]  ? ip_finish_output2+0x709/0x22a0
[   52.091722]  ? trace_hardirqs_on+0x28/0x180
[   52.091736]  __do_softirq+0x248/0x94c
[   52.091756]  ? ip_finish_output2+0x709/0x22a0
[   52.091768]  do_softirq_own_stack+0x2a/0x40
[   52.091773]  </IRQ>
[   52.091781]  do_softirq.part.17+0x11a/0x150
[   52.091788]  __local_bh_enable_ip+0x1ee/0x230
[   52.151480]  ip_finish_output2+0x72d/0x22a0
[   52.155798]  ? ip_frag_next+0xa10/0xa10
[   52.159758]  ? rcu_read_lock_held+0x9c/0xb0
[   52.164182]  ? rcu_read_lock_held_common+0x170/0x170
[   52.169281]  __ip_finish_output+0x401/0xa50
[   52.173615]  ? __ip_finish_output+0x401/0xa50
[   52.178108]  ip_finish_output+0x27/0x170
[   52.182157]  ip_output+0x1c6/0x560
[   52.185699]  ? ip_mc_output+0xd10/0xd10
[   52.189662]  ? __ip_finish_output+0xa50/0xa50
[   52.194140]  ? rcu_read_lock_held_common+0x170/0x170
[   52.199227]  ? rcu_read_lock_held+0x9c/0xb0
[   52.203534]  ip_local_out+0x7e/0x130
[   52.207233]  __ip_queue_xmit+0x6f6/0x1de0
[   52.211362]  ? __skb_checksum+0x7c0/0x7c0
[   52.215501]  ? skb_send_sock_locked+0x750/0x750
[   52.220236]  ? reqsk_fastopen_remove+0x560/0x560
[   52.224972]  ? dccp_insert_options+0x1e2/0xb20
[   52.229567]  ip_queue_xmit+0x45/0x70
[   52.233264]  dccp_transmit_skb+0xb76/0x12a0
[   52.237577]  dccp_xmit_packet+0x1a0/0x580
[   52.241712]  dccp_write_xmit+0x128/0x180
[   52.245776]  dccp_sendmsg+0x68f/0xdb0
[   52.249560]  ? aa_sk_perm+0x182/0x740
[   52.253344]  ? dccp_disconnect+0xa90/0xa90
[   52.257572]  ? aa_af_perm+0x240/0x240
[   52.261371]  inet_sendmsg+0xbd/0xe0
[   52.264987]  ? inet_send_prepare+0x3a0/0x3a0
[   52.269376]  sock_sendmsg+0xdf/0x110
[   52.273073]  ____sys_sendmsg+0x687/0xae0
[   52.277114]  ? copy_msghdr_from_user+0x20d/0x3f0
[   52.281853]  ? kernel_sendmsg+0x30/0x30
[   52.285814]  ? __fget+0x2ae/0x440
[   52.289255]  ___sys_sendmsg+0xe4/0x160
[   52.293126]  ? sendmsg_copy_msghdr+0x30/0x30
[   52.297516]  ? rcu_read_lock_held+0x9c/0xb0
[   52.301818]  ? rcu_read_lock_held_common+0x170/0x170
[   52.307543]  ? __fget+0x2c8/0x440
[   52.311333]  ? __x64_sys_dup2+0x2e0/0x2e0
[   52.315465]  ? lock_downgrade+0x900/0x900
[   52.319602]  ? __fget_light+0x17f/0x1f0
[   52.323574]  ? __fdget+0xe/0x10
[   52.326841]  __sys_sendmsg+0xd9/0x180
[   52.330638]  ? __sys_sendmsg_sock+0xa0/0xa0
[   52.334959]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   52.340216]  ? __sched_text_start+0x8/0x8
[   52.344371]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   52.349722]  __x64_sys_sendmsg+0x73/0xb0
[   52.353770]  do_syscall_64+0xd0/0x600
[   52.357554]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   52.362725] RIP: 0033:0x452f89
[   52.365914] 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
[   52.384801] RSP: 002b:00007feddfc49c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   52.392487] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   52.400011] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   52.407265] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   52.414601] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   52.421852] R13: 00000000ffffffff R14: 00007feddfc4a6d4 R15: 0000000000000002
[   52.429276] CPU: 0 PID: 4853 Comm: syz-executor2 Not tainted 5.5.0-rc6-syzkaller #0
[   52.437082] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   52.439798] 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()
[   52.446436] Call Trace:
[   52.446441]  <IRQ>
[   52.446453]  dump_stack+0x12f/0x187
[   52.446475]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   52.446490]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   52.446496]  ? dccp_parse_options+0x333/0x1000
[   52.446515]  dccp_deliver_input_to_ccids+0xcc/0x220
[   52.446526]  dccp_rcv_established+0x49/0x70
[   52.491758]  dccp_v4_do_rcv+0xf4/0x160
[   52.495637]  __sk_receive_skb+0x2b6/0x9e0
[   52.499790]  ? sk_free+0x60/0x60
[   52.503143]  ? dccp_invalid_packet+0x3ec/0x750
[   52.507727]  dccp_v4_rcv+0xc22/0x1c0b
[   52.511528]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   52.516274]  ip_local_deliver_finish+0x1ee/0x2e0
[   52.521017]  ip_local_deliver+0x306/0x450
[   52.525150]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   52.530060]  ? lock_downgrade+0x900/0x900
[   52.534194]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   52.539123]  ip_rcv_finish+0xb0/0x170
[   52.542907]  ip_rcv+0xcb/0x2f0
[   52.546099]  ? ip_local_deliver+0x450/0x450
[   52.550408]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   52.555758]  ? ip_local_deliver+0x450/0x450
[   52.560087]  __netif_receive_skb_one_core+0x132/0x190
[   52.565262]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   52.571754]  ? lock_acquire+0x194/0x3e0
[   52.575910]  ? process_backlog+0x182/0x6d0
[   52.580136]  __netif_receive_skb+0x1f/0x1b0
[   52.584449]  process_backlog+0x1cb/0x6d0
[   52.588495]  ? __do_softirq+0x248/0x94c
[   52.592461]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   52.597149]  net_rx_action+0x42d/0xde0
[   52.601177]  ? mark_lock+0xc5/0x1200
[   52.604897]  ? napi_busy_loop+0x6e0/0x6e0
[   52.609043]  ? rcu_is_watching+0x31/0x80
[   52.613097]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   52.617930]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   52.623210]  ? __do_softirq+0x1d9/0x94c
[   52.627181]  ? ip_finish_output2+0x709/0x22a0
[   52.631672]  ? trace_hardirqs_on+0x28/0x180
[   52.635992]  __do_softirq+0x248/0x94c
[   52.639842]  ? ip_finish_output2+0x709/0x22a0
[   52.644343]  do_softirq_own_stack+0x2a/0x40
[   52.648657]  </IRQ>
[   52.650880]  do_softirq.part.17+0x11a/0x150
[   52.655285]  __local_bh_enable_ip+0x1ee/0x230
[   52.659778]  ip_finish_output2+0x72d/0x22a0
[   52.664159]  ? ip_frag_next+0xa10/0xa10
[   52.668132]  ? rcu_read_lock_held+0x9c/0xb0
[   52.672466]  ? rcu_read_lock_held_common+0x170/0x170
[   52.677591]  __ip_finish_output+0x401/0xa50
[   52.681908]  ? __ip_finish_output+0x401/0xa50
[   52.686407]  ip_finish_output+0x27/0x170
[   52.690467]  ip_output+0x1c6/0x560
[   52.694006]  ? ip_mc_output+0xd10/0xd10
[   52.697985]  ? __ip_finish_output+0xa50/0xa50
[   52.702466]  ? rcu_read_lock_held_common+0x170/0x170
[   52.707707]  ? rcu_read_lock_held+0x9c/0xb0
[   52.712031]  ip_local_out+0x7e/0x130
[   52.715745]  __ip_queue_xmit+0x6f6/0x1de0
[   52.719992]  ? __skb_checksum+0x7c0/0x7c0
[   52.724133]  ? skb_send_sock_locked+0x750/0x750
[   52.728795]  ? reqsk_fastopen_remove+0x560/0x560
[   52.733544]  ? dccp_insert_options+0x1e2/0xb20
[   52.738138]  ip_queue_xmit+0x45/0x70
[   52.741843]  dccp_transmit_skb+0xb76/0x12a0
[   52.746165]  dccp_xmit_packet+0x1a0/0x580
[   52.750303]  dccp_write_xmit+0x128/0x180
[   52.754351]  dccp_sendmsg+0x68f/0xdb0
[   52.758137]  ? aa_sk_perm+0x182/0x740
[   52.761925]  ? dccp_disconnect+0xa90/0xa90
[   52.766146]  ? aa_af_perm+0x240/0x240
[   52.769950]  inet_sendmsg+0xbd/0xe0
[   52.773563]  ? inet_send_prepare+0x3a0/0x3a0
[   52.777957]  sock_sendmsg+0xdf/0x110
[   52.781667]  ____sys_sendmsg+0x687/0xae0
[   52.785734]  ? copy_msghdr_from_user+0x20d/0x3f0
[   52.790476]  ? kernel_sendmsg+0x30/0x30
[   52.794456]  ? __fget+0x2ae/0x440
[   52.797913]  ___sys_sendmsg+0xe4/0x160
[   52.801806]  ? sendmsg_copy_msghdr+0x30/0x30
[   52.806205]  ? rcu_read_lock_held+0x9c/0xb0
[   52.810526]  ? rcu_read_lock_held_common+0x170/0x170
[   52.815632]  ? __fget+0x2c8/0x440
[   52.819097]  ? __x64_sys_dup2+0x2e0/0x2e0
[   52.823238]  ? lock_downgrade+0x900/0x900
[   52.827382]  ? __fget_light+0x17f/0x1f0
[   52.831346]  ? __fdget+0xe/0x10
[   52.834623]  __sys_sendmsg+0xd9/0x180
[   52.838407]  ? __sys_sendmsg_sock+0xa0/0xa0
[   52.842724]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   52.847984]  ? __sched_text_start+0x8/0x8
[   52.852126]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   52.857501]  __x64_sys_sendmsg+0x73/0xb0
[   52.861557]  do_syscall_64+0xd0/0x600
[   52.865352]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   52.870524] RIP: 0033:0x452f89
[   52.873704] 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
[   52.892597] RSP: 002b:00007f536a3a1c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   52.900299] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   52.907568] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   52.914825] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   52.922079] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   52.929331] R13: 00000000ffffffff R14: 00007f536a3a26d4 R15: 0000000000000002
[   52.936613] CPU: 1 PID: 4852 Comm: syz-executor Not tainted 5.5.0-rc6-syzkaller #0
[   52.944322] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   52.954103] Call Trace:
[   52.956677]  <IRQ>
[   52.958822]  dump_stack+0x12f/0x187
[   52.962442]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   52.967641]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   52.972553]  ? dccp_parse_options+0x333/0x1000
[   52.977126]  dccp_deliver_input_to_ccids+0xcc/0x220
[   52.982141]  dccp_rcv_established+0x49/0x70
[   52.986448]  dccp_v4_do_rcv+0xf4/0x160
[   52.990320]  __sk_receive_skb+0x2b6/0x9e0
[   52.996406]  ? sk_free+0x60/0x60
[   52.999757]  ? dccp_invalid_packet+0x3ec/0x750
[   53.004602]  dccp_v4_rcv+0xc22/0x1c0b
[   53.008415]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   53.013171]  ip_local_deliver_finish+0x1ee/0x2e0
[   53.017922]  ip_local_deliver+0x306/0x450
[   53.022058]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   53.026970]  ? lock_downgrade+0x900/0x900
[   53.031106]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   53.036027]  ip_rcv_finish+0xb0/0x170
[   53.039813]  ip_rcv+0xcb/0x2f0
[   53.042988]  ? ip_local_deliver+0x450/0x450
[   53.047296]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   53.052646]  ? ip_local_deliver+0x450/0x450
[   53.056953]  __netif_receive_skb_one_core+0x132/0x190
[   53.062904]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   53.068075]  ? lock_acquire+0x194/0x3e0
[   53.072028]  ? process_backlog+0x182/0x6d0
[   53.076248]  __netif_receive_skb+0x1f/0x1b0
[   53.080551]  process_backlog+0x1cb/0x6d0
[   53.084620]  ? __do_softirq+0x248/0x94c
[   53.088932]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   53.093508]  net_rx_action+0x42d/0xde0
[   53.097398]  ? mark_lock+0xc5/0x1200
[   53.101101]  ? napi_busy_loop+0x6e0/0x6e0
[   53.105229]  ? rcu_is_watching+0x31/0x80
[   53.109275]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   53.114098]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   53.119351]  ? __do_softirq+0x1d9/0x94c
[   53.123302]  ? ip_finish_output2+0x709/0x22a0
[   53.127788]  ? trace_hardirqs_on+0x28/0x180
[   53.132092]  __do_softirq+0x248/0x94c
[   53.135888]  ? ip_finish_output2+0x709/0x22a0
[   53.140383]  do_softirq_own_stack+0x2a/0x40
[   53.144692]  </IRQ>
[   53.146926]  do_softirq.part.17+0x11a/0x150
[   53.151246]  __local_bh_enable_ip+0x1ee/0x230
[   53.155730]  ip_finish_output2+0x72d/0x22a0
[   53.160039]  ? ip_frag_next+0xa10/0xa10
[   53.163995]  ? rcu_read_lock_held+0x9c/0xb0
[   53.168297]  ? rcu_read_lock_held_common+0x170/0x170
[   53.173406]  __ip_finish_output+0x401/0xa50
[   53.177712]  ? __ip_finish_output+0x401/0xa50
[   53.182194]  ip_finish_output+0x27/0x170
[   53.186243]  ip_output+0x1c6/0x560
[   53.189768]  ? ip_mc_output+0xd10/0xd10
[   53.193729]  ? __ip_finish_output+0xa50/0xa50
[   53.198207]  ? rcu_read_lock_held_common+0x170/0x170
[   53.203295]  ? rcu_read_lock_held+0x9c/0xb0
[   53.207618]  ip_local_out+0x7e/0x130
[   53.211327]  __ip_queue_xmit+0x6f6/0x1de0
[   53.215467]  ? __skb_checksum+0x7c0/0x7c0
[   53.219599]  ? skb_send_sock_locked+0x750/0x750
[   53.224250]  ? reqsk_fastopen_remove+0x560/0x560
[   53.228993]  ? dccp_insert_options+0x1e2/0xb20
[   53.233566]  ip_queue_xmit+0x45/0x70
[   53.237268]  dccp_transmit_skb+0xb76/0x12a0
[   53.241586]  dccp_xmit_packet+0x1a0/0x580
[   53.245722]  dccp_write_xmit+0x128/0x180
[   53.249784]  dccp_sendmsg+0x68f/0xdb0
[   53.253570]  ? aa_sk_perm+0x182/0x740
[   53.257357]  ? dccp_disconnect+0xa90/0xa90
[   53.261576]  ? aa_af_perm+0x240/0x240
[   53.265375]  inet_sendmsg+0xbd/0xe0
[   53.269006]  ? inet_send_prepare+0x3a0/0x3a0
[   53.273395]  sock_sendmsg+0xdf/0x110
[   53.277108]  ____sys_sendmsg+0x687/0xae0
[   53.281154]  ? copy_msghdr_from_user+0x20d/0x3f0
[   53.285907]  ? kernel_sendmsg+0x30/0x30
[   53.289868]  ? __fget+0x2ae/0x440
[   53.293314]  ___sys_sendmsg+0xe4/0x160
[   53.297189]  ? sendmsg_copy_msghdr+0x30/0x30
[   53.301579]  ? rcu_read_lock_held+0x9c/0xb0
[   53.305970]  ? rcu_read_lock_held_common+0x170/0x170
[   53.311076]  ? __fget+0x2c8/0x440
[   53.314537]  ? __x64_sys_dup2+0x2e0/0x2e0
[   53.318669]  ? lock_downgrade+0x900/0x900
[   53.322810]  ? __fget_light+0x17f/0x1f0
[   53.326769]  ? __fdget+0xe/0x10
[   53.330045]  __sys_sendmsg+0xd9/0x180
[   53.333839]  ? __sys_sendmsg_sock+0xa0/0xa0
[   53.338163]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   53.343423]  ? __sched_text_start+0x8/0x8
[   53.347577]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   53.353012]  __x64_sys_sendmsg+0x73/0xb0
[   53.357077]  do_syscall_64+0xd0/0x600
[   53.360869]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   53.366044] RIP: 0033:0x452f89
[   53.369220] 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
[   53.388103] RSP: 002b:00007f75c30edc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   53.395788] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
2020/01/13 01:49:18 executed programs: 18
[   53.403039] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   53.410287] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   53.417798] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   53.425058] R13: 00000000ffffffff R14: 00007f75c30ee6d4 R15: 0000000000000002
[   53.506927] 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()
[   53.514478] 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()
[   53.520667] CPU: 1 PID: 4875 Comm: syz-executor4 Not tainted 5.5.0-rc6-syzkaller #0
[   53.541865] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   53.551633] Call Trace:
[   53.554198]  <IRQ>
[   53.556337]  dump_stack+0x12f/0x187
[   53.559960]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   53.565138]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   53.569876]  ? dccp_parse_options+0x333/0x1000
[   53.574447]  dccp_deliver_input_to_ccids+0xcc/0x220
[   53.579449]  dccp_rcv_established+0x49/0x70
[   53.583753]  dccp_v4_do_rcv+0xf4/0x160
[   53.587712]  __sk_receive_skb+0x2b6/0x9e0
[   53.591862]  ? sk_free+0x60/0x60
[   53.595226]  ? dccp_invalid_packet+0x3ec/0x750
[   53.599803]  dccp_v4_rcv+0xc22/0x1c0b
[   53.603629]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   53.608372]  ip_local_deliver_finish+0x1ee/0x2e0
[   53.613111]  ip_local_deliver+0x306/0x450
[   53.617253]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   53.622163]  ? lock_downgrade+0x900/0x900
[   53.626296]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   53.631341]  ip_rcv_finish+0xb0/0x170
[   53.635139]  ip_rcv+0xcb/0x2f0
[   53.638320]  ? ip_local_deliver+0x450/0x450
[   53.642638]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   53.648000]  ? ip_local_deliver+0x450/0x450
[   53.652310]  __netif_receive_skb_one_core+0x132/0x190
[   53.657486]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   53.662665]  ? lock_acquire+0x194/0x3e0
[   53.666622]  ? process_backlog+0x182/0x6d0
[   53.670861]  __netif_receive_skb+0x1f/0x1b0
[   53.675183]  process_backlog+0x1cb/0x6d0
[   53.679240]  ? __do_softirq+0x248/0x94c
[   53.683200]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   53.687795]  net_rx_action+0x42d/0xde0
[   53.691710]  ? mark_lock+0xc5/0x1200
[   53.695417]  ? napi_busy_loop+0x6e0/0x6e0
[   53.699548]  ? rcu_is_watching+0x31/0x80
[   53.703611]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   53.708434]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   53.713714]  ? __do_softirq+0x1d9/0x94c
[   53.717667]  ? ip_finish_output2+0x709/0x22a0
[   53.722143]  ? trace_hardirqs_on+0x28/0x180
[   53.726479]  __do_softirq+0x248/0x94c
[   53.730280]  ? ip_finish_output2+0x709/0x22a0
[   53.734776]  do_softirq_own_stack+0x2a/0x40
[   53.739083]  </IRQ>
[   53.741324]  do_softirq.part.17+0x11a/0x150
[   53.745632]  __local_bh_enable_ip+0x1ee/0x230
[   53.750111]  ip_finish_output2+0x72d/0x22a0
[   53.754425]  ? ip_frag_next+0xa10/0xa10
[   53.758386]  ? rcu_read_lock_held+0x9c/0xb0
[   53.762689]  ? rcu_read_lock_held_common+0x170/0x170
[   53.767784]  __ip_finish_output+0x401/0xa50
[   53.772117]  ? __ip_finish_output+0x401/0xa50
[   53.776609]  ip_finish_output+0x27/0x170
[   53.780666]  ip_output+0x1c6/0x560
[   53.784203]  ? ip_mc_output+0xd10/0xd10
[   53.788183]  ? __ip_finish_output+0xa50/0xa50
[   53.792678]  ? rcu_read_lock_held_common+0x170/0x170
[   53.797780]  ? rcu_read_lock_held+0x9c/0xb0
[   53.802096]  ip_local_out+0x7e/0x130
[   53.805799]  __ip_queue_xmit+0x6f6/0x1de0
[   53.809948]  ? __skb_checksum+0x7c0/0x7c0
[   53.814095]  ? skb_send_sock_locked+0x750/0x750
[   53.818748]  ? reqsk_fastopen_remove+0x560/0x560
[   53.823489]  ? dccp_insert_options+0x1e2/0xb20
[   53.828094]  ip_queue_xmit+0x45/0x70
[   53.831798]  dccp_transmit_skb+0xb76/0x12a0
[   53.836138]  dccp_xmit_packet+0x1a0/0x580
[   53.840278]  dccp_write_xmit+0x128/0x180
[   53.844325]  dccp_sendmsg+0x68f/0xdb0
[   53.848110]  ? aa_sk_perm+0x182/0x740
[   53.851895]  ? dccp_disconnect+0xa90/0xa90
[   53.856111]  ? aa_af_perm+0x240/0x240
[   53.860024]  inet_sendmsg+0xbd/0xe0
[   53.863646]  ? inet_send_prepare+0x3a0/0x3a0
[   53.868040]  sock_sendmsg+0xdf/0x110
[   53.871753]  ____sys_sendmsg+0x687/0xae0
[   53.875916]  ? copy_msghdr_from_user+0x20d/0x3f0
[   53.880662]  ? kernel_sendmsg+0x30/0x30
[   53.884626]  ? __fget+0x2ae/0x440
[   53.888076]  ___sys_sendmsg+0xe4/0x160
[   53.891956]  ? sendmsg_copy_msghdr+0x30/0x30
[   53.896350]  ? rcu_read_lock_held+0x9c/0xb0
[   53.900670]  ? rcu_read_lock_held_common+0x170/0x170
[   53.905774]  ? __fget+0x2c8/0x440
[   53.909220]  ? __x64_sys_dup2+0x2e0/0x2e0
[   53.913366]  ? lock_downgrade+0x900/0x900
[   53.917507]  ? __fget_light+0x17f/0x1f0
[   53.921469]  ? __fdget+0xe/0x10
[   53.924753]  __sys_sendmsg+0xd9/0x180
[   53.928550]  ? __sys_sendmsg_sock+0xa0/0xa0
[   53.932867]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   53.938136]  ? __sched_text_start+0x8/0x8
[   53.942304]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   53.947670]  __x64_sys_sendmsg+0x73/0xb0
[   53.951734]  do_syscall_64+0xd0/0x600
[   53.955522]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   53.960691] RIP: 0033:0x452f89
[   53.963866] 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
[   53.982749] RSP: 002b:00007fceb6132c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   53.990452] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   53.997708] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   54.005065] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   54.012329] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   54.019603] R13: 00000000ffffffff R14: 00007fceb61336d4 R15: 0000000000000002
[   54.026896] CPU: 0 PID: 4883 Comm: syz-executor3 Not tainted 5.5.0-rc6-syzkaller #0
[   54.034697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.044035] Call Trace:
[   54.046599]  <IRQ>
[   54.048756]  dump_stack+0x12f/0x187
[   54.052403]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   54.057595]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   54.062353]  ? dccp_parse_options+0x333/0x1000
[   54.066931]  dccp_deliver_input_to_ccids+0xcc/0x220
[   54.071960]  dccp_rcv_established+0x49/0x70
[   54.076279]  dccp_v4_do_rcv+0xf4/0x160
[   54.080148]  __sk_receive_skb+0x2b6/0x9e0
[   54.084283]  ? sk_free+0x60/0x60
[   54.087630]  ? dccp_invalid_packet+0x3ec/0x750
[   54.092206]  dccp_v4_rcv+0xc22/0x1c0b
[   54.096023]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   54.100886]  ip_local_deliver_finish+0x1ee/0x2e0
[   54.105634]  ip_local_deliver+0x306/0x450
[   54.109862]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   54.114779]  ? lock_downgrade+0x900/0x900
[   54.118913]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   54.123830]  ip_rcv_finish+0xb0/0x170
[   54.127615]  ip_rcv+0xcb/0x2f0
[   54.130875]  ? ip_local_deliver+0x450/0x450
[   54.135193]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   54.140546]  ? ip_local_deliver+0x450/0x450
[   54.144850]  __netif_receive_skb_one_core+0x132/0x190
[   54.150024]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   54.155200]  ? lock_acquire+0x194/0x3e0
[   54.159153]  ? process_backlog+0x182/0x6d0
[   54.163371]  __netif_receive_skb+0x1f/0x1b0
[   54.167673]  process_backlog+0x1cb/0x6d0
[   54.172147]  ? __do_softirq+0x248/0x94c
[   54.176113]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   54.180680]  net_rx_action+0x42d/0xde0
[   54.184549]  ? mark_lock+0xc5/0x1200
[   54.188270]  ? napi_busy_loop+0x6e0/0x6e0
[   54.192400]  ? rcu_is_watching+0x31/0x80
[   54.196459]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   54.201299]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   54.206565]  ? __do_softirq+0x1d9/0x94c
[   54.210520]  ? ip_finish_output2+0x709/0x22a0
[   54.215002]  ? trace_hardirqs_on+0x28/0x180
[   54.219308]  __do_softirq+0x248/0x94c
[   54.223096]  ? ip_finish_output2+0x709/0x22a0
[   54.227589]  do_softirq_own_stack+0x2a/0x40
[   54.231929]  </IRQ>
[   54.234170]  do_softirq.part.17+0x11a/0x150
[   54.238498]  __local_bh_enable_ip+0x1ee/0x230
[   54.242999]  ip_finish_output2+0x72d/0x22a0
[   54.247340]  ? ip_frag_next+0xa10/0xa10
[   54.251325]  ? rcu_read_lock_held+0x9c/0xb0
[   54.255651]  ? rcu_read_lock_held_common+0x170/0x170
[   54.260762]  __ip_finish_output+0x401/0xa50
[   54.265087]  ? __ip_finish_output+0x401/0xa50
[   54.269602]  ip_finish_output+0x27/0x170
[   54.273671]  ip_output+0x1c6/0x560
[   54.277252]  ? ip_mc_output+0xd10/0xd10
[   54.281243]  ? __ip_finish_output+0xa50/0xa50
[   54.285748]  ? rcu_read_lock_held_common+0x170/0x170
[   54.290903]  ? rcu_read_lock_held+0x9c/0xb0
[   54.295221]  ip_local_out+0x7e/0x130
[   54.298948]  __ip_queue_xmit+0x6f6/0x1de0
[   54.301329] 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()
[   54.303113]  ? __skb_checksum+0x7c0/0x7c0
[   54.303120]  ? skb_send_sock_locked+0x750/0x750
[   54.303125]  ? reqsk_fastopen_remove+0x560/0x560
[   54.303133]  ? dccp_insert_options+0x1e2/0xb20
[   54.303152]  ip_queue_xmit+0x45/0x70
[   54.303163]  dccp_transmit_skb+0xb76/0x12a0
[   54.303183]  dccp_xmit_packet+0x1a0/0x580
[   54.346562]  dccp_write_xmit+0x128/0x180
[   54.350610]  dccp_sendmsg+0x68f/0xdb0
[   54.356145]  ? aa_sk_perm+0x182/0x740
[   54.359952]  ? dccp_disconnect+0xa90/0xa90
[   54.364193]  ? aa_af_perm+0x240/0x240
[   54.367996]  inet_sendmsg+0xbd/0xe0
[   54.371604]  ? inet_send_prepare+0x3a0/0x3a0
[   54.376008]  sock_sendmsg+0xdf/0x110
[   54.379713]  ____sys_sendmsg+0x687/0xae0
[   54.383769]  ? copy_msghdr_from_user+0x20d/0x3f0
[   54.388510]  ? kernel_sendmsg+0x30/0x30
[   54.392485]  ? __fget+0x2ae/0x440
[   54.395931]  ___sys_sendmsg+0xe4/0x160
[   54.399805]  ? sendmsg_copy_msghdr+0x30/0x30
[   54.404191]  ? rcu_read_lock_held+0x9c/0xb0
[   54.408593]  ? rcu_read_lock_held_common+0x170/0x170
[   54.413686]  ? __fget+0x2c8/0x440
[   54.417143]  ? __x64_sys_dup2+0x2e0/0x2e0
[   54.421273]  ? lock_downgrade+0x900/0x900
[   54.425402]  ? __kasan_check_write+0x14/0x20
[   54.429805]  ? do_raw_spin_lock+0x132/0x2e0
[   54.434116]  ? __fget_light+0x17f/0x1f0
[   54.438092]  ? __fdget+0xe/0x10
[   54.441364]  __sys_sendmsg+0xd9/0x180
[   54.445160]  ? __sys_sendmsg_sock+0xa0/0xa0
[   54.449465]  ? rcu_is_watching+0x31/0x80
[   54.453521]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   54.458345]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   54.463614]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   54.468968]  __x64_sys_sendmsg+0x73/0xb0
[   54.473019]  do_syscall_64+0xd0/0x600
[   54.476805]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   54.481975] RIP: 0033:0x452f89
[   54.485150] 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
[   54.504034] RSP: 002b:00007f333aebbc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   54.511721] RAX: ffffffffffffffda RBX: 000000000071c010 RCX: 0000000000452f89
[   54.518985] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   54.526336] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   54.533610] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   54.540893] R13: 00000000ffffffff R14: 00007f333aebc6d4 R15: 0000000000000008
[   54.548189] CPU: 1 PID: 4894 Comm: syz-executor2 Not tainted 5.5.0-rc6-syzkaller #0
[   54.555996] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.556791] 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()
[   54.565355] Call Trace:
[   54.565360]  <IRQ>
[   54.565373]  dump_stack+0x12f/0x187
[   54.565392]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   54.565406]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   54.565413]  ? dccp_parse_options+0x333/0x1000
[   54.565433]  dccp_deliver_input_to_ccids+0xcc/0x220
[   54.565446]  dccp_rcv_established+0x49/0x70
[   54.565455]  dccp_v4_do_rcv+0xf4/0x160
[   54.565467]  __sk_receive_skb+0x2b6/0x9e0
[   54.565482]  ? sk_free+0x60/0x60
[   54.622061]  ? dccp_invalid_packet+0x3ec/0x750
[   54.626638]  dccp_v4_rcv+0xc22/0x1c0b
[   54.630455]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   54.635199]  ip_local_deliver_finish+0x1ee/0x2e0
[   54.639942]  ip_local_deliver+0x306/0x450
[   54.644083]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   54.648993]  ? lock_downgrade+0x900/0x900
[   54.653125]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   54.658055]  ip_rcv_finish+0xb0/0x170
[   54.661839]  ip_rcv+0xcb/0x2f0
[   54.665015]  ? ip_local_deliver+0x450/0x450
[   54.669322]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   54.674672]  ? ip_local_deliver+0x450/0x450
[   54.678979]  __netif_receive_skb_one_core+0x132/0x190
[   54.684166]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   54.689340]  ? lock_acquire+0x194/0x3e0
[   54.693298]  ? process_backlog+0x182/0x6d0
[   54.697530]  __netif_receive_skb+0x1f/0x1b0
[   54.701852]  process_backlog+0x1cb/0x6d0
[   54.705898]  ? __do_softirq+0x248/0x94c
[   54.709859]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   54.714436]  net_rx_action+0x42d/0xde0
[   54.718401]  ? mark_lock+0xc5/0x1200
[   54.722118]  ? napi_busy_loop+0x6e0/0x6e0
[   54.726246]  ? rcu_is_watching+0x31/0x80
[   54.730298]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   54.735134]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   54.740390]  ? __do_softirq+0x1d9/0x94c
[   54.744344]  ? ip_finish_output2+0x709/0x22a0
[   54.748833]  ? trace_hardirqs_on+0x28/0x180
[   54.753161]  __do_softirq+0x248/0x94c
[   54.756959]  ? ip_finish_output2+0x709/0x22a0
[   54.761526]  do_softirq_own_stack+0x2a/0x40
[   54.765840]  </IRQ>
[   54.768335]  do_softirq.part.17+0x11a/0x150
[   54.772637]  __local_bh_enable_ip+0x1ee/0x230
[   54.777115]  ip_finish_output2+0x72d/0x22a0
[   54.781433]  ? ip_frag_next+0xa10/0xa10
[   54.785391]  ? rcu_read_lock_held+0x9c/0xb0
[   54.789710]  ? rcu_read_lock_held_common+0x170/0x170
[   54.794801]  __ip_finish_output+0x401/0xa50
[   54.799102]  ? __ip_finish_output+0x401/0xa50
[   54.803584]  ip_finish_output+0x27/0x170
[   54.807627]  ip_output+0x1c6/0x560
[   54.811152]  ? ip_mc_output+0xd10/0xd10
[   54.815112]  ? __ip_finish_output+0xa50/0xa50
[   54.819589]  ? rcu_read_lock_held_common+0x170/0x170
[   54.824688]  ? rcu_read_lock_held+0x9c/0xb0
[   54.829009]  ip_local_out+0x7e/0x130
[   54.832731]  __ip_queue_xmit+0x6f6/0x1de0
[   54.836876]  ? __skb_checksum+0x7c0/0x7c0
[   54.841013]  ? skb_send_sock_locked+0x750/0x750
[   54.845667]  ? reqsk_fastopen_remove+0x560/0x560
[   54.850415]  ? dccp_insert_options+0x1e2/0xb20
[   54.854996]  ip_queue_xmit+0x45/0x70
[   54.858700]  dccp_transmit_skb+0xb76/0x12a0
[   54.863026]  dccp_xmit_packet+0x1a0/0x580
[   54.867163]  dccp_write_xmit+0x128/0x180
[   54.871212]  dccp_sendmsg+0x68f/0xdb0
[   54.874999]  ? aa_sk_perm+0x182/0x740
[   54.878786]  ? dccp_disconnect+0xa90/0xa90
[   54.883005]  ? aa_af_perm+0x240/0x240
[   54.886811]  inet_sendmsg+0xbd/0xe0
[   54.890426]  ? inet_send_prepare+0x3a0/0x3a0
[   54.894816]  sock_sendmsg+0xdf/0x110
[   54.898517]  ____sys_sendmsg+0x687/0xae0
[   54.902563]  ? copy_msghdr_from_user+0x20d/0x3f0
[   54.907328]  ? kernel_sendmsg+0x30/0x30
[   54.911295]  ? __fget+0x2ae/0x440
[   54.914741]  ___sys_sendmsg+0xe4/0x160
[   54.918630]  ? sendmsg_copy_msghdr+0x30/0x30
[   54.923026]  ? rcu_read_lock_held+0x9c/0xb0
[   54.927330]  ? rcu_read_lock_held_common+0x170/0x170
[   54.932434]  ? __fget+0x2c8/0x440
[   54.935893]  ? __x64_sys_dup2+0x2e0/0x2e0
[   54.940024]  ? lock_downgrade+0x900/0x900
[   54.944294]  ? __fget_light+0x17f/0x1f0
[   54.948263]  ? __fdget+0xe/0x10
[   54.951540]  __sys_sendmsg+0xd9/0x180
[   54.955331]  ? __sys_sendmsg_sock+0xa0/0xa0
[   54.959660]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   54.964925]  ? __sched_text_start+0x8/0x8
[   54.969114]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   54.974475]  __x64_sys_sendmsg+0x73/0xb0
[   54.978538]  do_syscall_64+0xd0/0x600
[   54.982332]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   54.987522] RIP: 0033:0x452f89
[   54.990696] 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
[   55.009598] RSP: 002b:00007f536a3a1c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   55.017299] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   55.024554] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   55.031820] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   55.039086] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   55.046337] R13: 00000000ffffffff R14: 00007f536a3a26d4 R15: 0000000000000002
[   55.053612] CPU: 0 PID: 4893 Comm: syz-executor Not tainted 5.5.0-rc6-syzkaller #0
[   55.061328] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   55.070670] Call Trace:
[   55.073239]  <IRQ>
[   55.075389]  dump_stack+0x12f/0x187
[   55.079019]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   55.084211]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   55.088960]  ? dccp_parse_options+0x333/0x1000
[   55.093549]  dccp_deliver_input_to_ccids+0xcc/0x220
[   55.098571]  dccp_rcv_established+0x49/0x70
[   55.102877]  dccp_v4_do_rcv+0xf4/0x160
[   55.106750]  __sk_receive_skb+0x2b6/0x9e0
[   55.110910]  ? sk_free+0x60/0x60
[   55.114262]  ? dccp_invalid_packet+0x3ec/0x750
[   55.118833]  dccp_v4_rcv+0xc22/0x1c0b
[   55.122633]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   55.127376]  ip_local_deliver_finish+0x1ee/0x2e0
[   55.132118]  ip_local_deliver+0x306/0x450
[   55.136265]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   55.141175]  ? lock_downgrade+0x900/0x900
[   55.145307]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   55.150230]  ip_rcv_finish+0xb0/0x170
[   55.154012]  ip_rcv+0xcb/0x2f0
[   55.157190]  ? ip_local_deliver+0x450/0x450
[   55.161496]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   55.166846]  ? ip_local_deliver+0x450/0x450
[   55.171150]  __netif_receive_skb_one_core+0x132/0x190
[   55.176320]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   55.181493]  ? lock_acquire+0x194/0x3e0
[   55.185447]  ? process_backlog+0x182/0x6d0
[   55.189665]  __netif_receive_skb+0x1f/0x1b0
[   55.193974]  process_backlog+0x1cb/0x6d0
[   55.198014]  ? __do_softirq+0x248/0x94c
[   55.201972]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   55.206543]  net_rx_action+0x42d/0xde0
[   55.210413]  ? mark_lock+0xc5/0x1200
[   55.214112]  ? napi_busy_loop+0x6e0/0x6e0
[   55.218242]  ? rcu_is_watching+0x31/0x80
[   55.222301]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   55.227124]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   55.232378]  ? __do_softirq+0x1d9/0x94c
[   55.236349]  ? ip_finish_output2+0x709/0x22a0
[   55.240825]  ? trace_hardirqs_on+0x28/0x180
[   55.245133]  __do_softirq+0x248/0x94c
[   55.248935]  ? ip_finish_output2+0x709/0x22a0
[   55.253418]  do_softirq_own_stack+0x2a/0x40
[   55.257720]  </IRQ>
[   55.259939]  do_softirq.part.17+0x11a/0x150
[   55.264246]  __local_bh_enable_ip+0x1ee/0x230
[   55.268723]  ip_finish_output2+0x72d/0x22a0
[   55.273047]  ? ip_frag_next+0xa10/0xa10
[   55.277035]  ? rcu_read_lock_held+0x9c/0xb0
[   55.281345]  ? rcu_read_lock_held_common+0x170/0x170
[   55.286438]  __ip_finish_output+0x401/0xa50
[   55.290745]  ? __ip_finish_output+0x401/0xa50
[   55.295231]  ip_finish_output+0x27/0x170
[   55.299278]  ip_output+0x1c6/0x560
[   55.302806]  ? ip_mc_output+0xd10/0xd10
[   55.306766]  ? __ip_finish_output+0xa50/0xa50
[   55.311242]  ? rcu_read_lock_held_common+0x170/0x170
[   55.316326]  ? rcu_read_lock_held+0x9c/0xb0
[   55.320647]  ip_local_out+0x7e/0x130
[   55.324344]  __ip_queue_xmit+0x6f6/0x1de0
[   55.328471]  ? __skb_checksum+0x7c0/0x7c0
[   55.332598]  ? skb_send_sock_locked+0x750/0x750
[   55.337246]  ? reqsk_fastopen_remove+0x560/0x560
[   55.341982]  ? dccp_insert_options+0x1e2/0xb20
[   55.346585]  ip_queue_xmit+0x45/0x70
[   55.350396]  dccp_transmit_skb+0xb76/0x12a0
[   55.354716]  dccp_xmit_packet+0x1a0/0x580
[   55.358852]  dccp_write_xmit+0x128/0x180
[   55.362913]  dccp_sendmsg+0x68f/0xdb0
[   55.366718]  ? aa_sk_perm+0x182/0x740
[   55.370507]  ? dccp_disconnect+0xa90/0xa90
[   55.374724]  ? aa_af_perm+0x240/0x240
[   55.378525]  inet_sendmsg+0xbd/0xe0
[   55.382134]  ? inet_send_prepare+0x3a0/0x3a0
[   55.386695]  sock_sendmsg+0xdf/0x110
[   55.390393]  ____sys_sendmsg+0x687/0xae0
[   55.394436]  ? copy_msghdr_from_user+0x20d/0x3f0
[   55.399179]  ? kernel_sendmsg+0x30/0x30
[   55.403137]  ? __fget+0x2ae/0x440
[   55.406592]  ___sys_sendmsg+0xe4/0x160
[   55.410462]  ? sendmsg_copy_msghdr+0x30/0x30
[   55.414851]  ? rcu_read_lock_held+0x9c/0xb0
[   55.419158]  ? rcu_read_lock_held_common+0x170/0x170
[   55.424268]  ? __fget+0x2c8/0x440
[   55.427711]  ? __x64_sys_dup2+0x2e0/0x2e0
[   55.431838]  ? lock_downgrade+0x900/0x900
[   55.435975]  ? __fget_light+0x17f/0x1f0
[   55.439952]  ? __fdget+0xe/0x10
[   55.443220]  __sys_sendmsg+0xd9/0x180
[   55.447001]  ? __sys_sendmsg_sock+0xa0/0xa0
[   55.451312]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   55.456584]  ? __sched_text_start+0x8/0x8
[   55.460727]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   55.466078]  __x64_sys_sendmsg+0x73/0xb0
[   55.470139]  do_syscall_64+0xd0/0x600
[   55.473928]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   55.479116] RIP: 0033:0x452f89
[   55.482293] 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
[   55.501267] RSP: 002b:00007f75c30edc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   55.508959] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   55.516213] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   55.523462] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   55.530711] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   55.537962] R13: 00000000ffffffff R14: 00007f75c30ee6d4 R15: 0000000000000002
[   55.599694] 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()
[   55.612972] CPU: 1 PID: 4909 Comm: syz-executor1 Not tainted 5.5.0-rc6-syzkaller #0
[   55.620772] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   55.630388] Call Trace:
[   55.632971]  <IRQ>
[   55.635139]  dump_stack+0x12f/0x187
[   55.638779]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   55.643983]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   55.648740]  ? dccp_parse_options+0x333/0x1000
[   55.648998] 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()
[   55.653330]  dccp_deliver_input_to_ccids+0xcc/0x220
[   55.653343]  dccp_rcv_established+0x49/0x70
[   55.653353]  dccp_v4_do_rcv+0xf4/0x160
[   55.653366]  __sk_receive_skb+0x2b6/0x9e0
[   55.653384]  ? sk_free+0x60/0x60
[   55.653392]  ? dccp_invalid_packet+0x3ec/0x750
[   55.653411]  dccp_v4_rcv+0xc22/0x1c0b
[   55.695629]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   55.700381]  ip_local_deliver_finish+0x1ee/0x2e0
[   55.705146]  ip_local_deliver+0x306/0x450
[   55.709280]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   55.714191]  ? lock_downgrade+0x900/0x900
[   55.718325]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   55.723258]  ip_rcv_finish+0xb0/0x170
[   55.727045]  ip_rcv+0xcb/0x2f0
[   55.730228]  ? ip_local_deliver+0x450/0x450
[   55.734534]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   55.739886]  ? ip_local_deliver+0x450/0x450
[   55.744191]  __netif_receive_skb_one_core+0x132/0x190
[   55.749367]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   55.754629]  ? lock_acquire+0x194/0x3e0
[   55.758600]  ? process_backlog+0x182/0x6d0
[   55.762866]  __netif_receive_skb+0x1f/0x1b0
[   55.767191]  process_backlog+0x1cb/0x6d0
[   55.771257]  ? __do_softirq+0x248/0x94c
[   55.775222]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   55.779800]  net_rx_action+0x42d/0xde0
[   55.783677]  ? mark_lock+0xc5/0x1200
[   55.787383]  ? napi_busy_loop+0x6e0/0x6e0
[   55.791512]  ? rcu_is_watching+0x31/0x80
[   55.795561]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   55.800385]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   55.805644]  ? __do_softirq+0x1d9/0x94c
[   55.809599]  ? ip_finish_output2+0x709/0x22a0
[   55.814100]  ? trace_hardirqs_on+0x28/0x180
[   55.818415]  __do_softirq+0x248/0x94c
[   55.822234]  ? ip_finish_output2+0x709/0x22a0
[   55.826718]  do_softirq_own_stack+0x2a/0x40
[   55.831023]  </IRQ>
[   55.833244]  do_softirq.part.17+0x11a/0x150
[   55.837548]  __local_bh_enable_ip+0x1ee/0x230
[   55.842028]  ip_finish_output2+0x72d/0x22a0
[   55.846351]  ? ip_frag_next+0xa10/0xa10
[   55.850310]  ? rcu_read_lock_held+0x9c/0xb0
[   55.854617]  ? rcu_read_lock_held_common+0x170/0x170
[   55.859723]  __ip_finish_output+0x401/0xa50
[   55.865068]  ? __ip_finish_output+0x401/0xa50
[   55.869567]  ip_finish_output+0x27/0x170
[   55.873625]  ip_output+0x1c6/0x560
[   55.877166]  ? ip_mc_output+0xd10/0xd10
[   55.881130]  ? __ip_finish_output+0xa50/0xa50
[   55.885605]  ? rcu_read_lock_held_common+0x170/0x170
[   55.890725]  ? rcu_read_lock_held+0x9c/0xb0
[   55.895074]  ip_local_out+0x7e/0x130
[   55.898781]  __ip_queue_xmit+0x6f6/0x1de0
[   55.902924]  ? __skb_checksum+0x7c0/0x7c0
[   55.907080]  ? skb_send_sock_locked+0x750/0x750
[   55.911736]  ? reqsk_fastopen_remove+0x560/0x560
[   55.916480]  ? dccp_insert_options+0x1e2/0xb20
[   55.921059]  ip_queue_xmit+0x45/0x70
[   55.924774]  dccp_transmit_skb+0xb76/0x12a0
[   55.929087]  dccp_xmit_packet+0x1a0/0x580
[   55.933225]  dccp_write_xmit+0x128/0x180
[   55.937271]  dccp_sendmsg+0x68f/0xdb0
[   55.941062]  ? aa_sk_perm+0x182/0x740
[   55.944876]  ? dccp_disconnect+0xa90/0xa90
[   55.949118]  ? aa_af_perm+0x240/0x240
[   55.952919]  inet_sendmsg+0xbd/0xe0
[   55.956542]  ? inet_send_prepare+0x3a0/0x3a0
[   55.960931]  sock_sendmsg+0xdf/0x110
[   55.964731]  ____sys_sendmsg+0x687/0xae0
[   55.968776]  ? copy_msghdr_from_user+0x20d/0x3f0
[   55.974131]  ? kernel_sendmsg+0x30/0x30
[   55.978105]  ? __fget+0x2ae/0x440
[   55.981547]  ___sys_sendmsg+0xe4/0x160
[   55.985435]  ? sendmsg_copy_msghdr+0x30/0x30
[   55.989823]  ? rcu_read_lock_held+0x9c/0xb0
[   55.994126]  ? rcu_read_lock_held_common+0x170/0x170
[   55.999220]  ? __fget+0x2c8/0x440
[   56.002665]  ? __x64_sys_dup2+0x2e0/0x2e0
[   56.006796]  ? lock_downgrade+0x900/0x900
[   56.010938]  ? __fget_light+0x17f/0x1f0
[   56.014921]  ? __fdget+0xe/0x10
[   56.018299]  __sys_sendmsg+0xd9/0x180
[   56.022117]  ? __sys_sendmsg_sock+0xa0/0xa0
[   56.026449]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   56.031711]  ? __sched_text_start+0x8/0x8
[   56.035870]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   56.041226]  __x64_sys_sendmsg+0x73/0xb0
[   56.045276]  do_syscall_64+0xd0/0x600
[   56.049065]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   56.054237] RIP: 0033:0x452f89
[   56.057433] 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
[   56.076318] RSP: 002b:00007fc466345c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   56.084006] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   56.091257] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   56.098512] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   56.105763] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   56.113032] R13: 00000000ffffffff R14: 00007fc4663466d4 R15: 0000000000000002
[   56.120309] CPU: 0 PID: 4920 Comm: syz-executor5 Not tainted 5.5.0-rc6-syzkaller #0
[   56.126687] net_ratelimit: 20 callbacks suppressed
[   56.126691] dccp_close: ABORT with 24 bytes unread
[   56.128110] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   56.128114] Call Trace:
[   56.128118]  <IRQ>
[   56.128130]  dump_stack+0x12f/0x187
[   56.128154]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   56.128167]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   56.134628] dccp_close: ABORT with 24 bytes unread
[   56.138044]  ? dccp_parse_options+0x333/0x1000
[   56.138065]  dccp_deliver_input_to_ccids+0xcc/0x220
[   56.138076]  dccp_rcv_established+0x49/0x70
[   56.152776] dccp_close: ABORT with 24 bytes unread
[   56.156399]  dccp_v4_do_rcv+0xf4/0x160
[   56.156413]  __sk_receive_skb+0x2b6/0x9e0
[   56.156430]  ? sk_free+0x60/0x60
[   56.167901] dccp_close: ABORT with 24 bytes unread
[   56.171334]  ? dccp_invalid_packet+0x3ec/0x750
[   56.171353]  dccp_v4_rcv+0xc22/0x1c0b
[   56.185266] dccp_close: ABORT with 24 bytes unread
[   56.185889]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   56.185905]  ip_local_deliver_finish+0x1ee/0x2e0
[   56.229964]  ip_local_deliver+0x306/0x450
[   56.234120]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   56.239046]  ? lock_downgrade+0x900/0x900
[   56.243202]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   56.248151]  ip_rcv_finish+0xb0/0x170
[   56.251960]  ip_rcv+0xcb/0x2f0
[   56.255161]  ? ip_local_deliver+0x450/0x450
[   56.259488]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   56.264877]  ? ip_local_deliver+0x450/0x450
[   56.265486] 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()
[   56.269196]  __netif_receive_skb_one_core+0x132/0x190
[   56.269206]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   56.269219]  ? lock_acquire+0x194/0x3e0
[   56.269226]  ? process_backlog+0x182/0x6d0
[   56.269241]  __netif_receive_skb+0x1f/0x1b0
[   56.269253]  process_backlog+0x1cb/0x6d0
[   56.269259]  ? __do_softirq+0x248/0x94c
[   56.269267]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   56.269284]  net_rx_action+0x42d/0xde0
[   56.325396]  ? mark_lock+0xc5/0x1200
[   56.329100]  ? napi_busy_loop+0x6e0/0x6e0
[   56.333227]  ? rcu_is_watching+0x31/0x80
[   56.337276]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   56.342227]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   56.347497]  ? __do_softirq+0x1d9/0x94c
[   56.351579]  ? ip_finish_output2+0x709/0x22a0
[   56.356063]  ? trace_hardirqs_on+0x28/0x180
[   56.360376]  __do_softirq+0x248/0x94c
[   56.364172]  ? ip_finish_output2+0x709/0x22a0
[   56.368674]  do_softirq_own_stack+0x2a/0x40
[   56.373154]  </IRQ>
[   56.375378]  do_softirq.part.17+0x11a/0x150
[   56.379685]  __local_bh_enable_ip+0x1ee/0x230
[   56.384164]  ip_finish_output2+0x72d/0x22a0
[   56.388488]  ? ip_frag_next+0xa10/0xa10
[   56.392468]  ? rcu_read_lock_held+0x9c/0xb0
[   56.396774]  ? rcu_read_lock_held_common+0x170/0x170
[   56.401878]  __ip_finish_output+0x401/0xa50
[   56.406191]  ? __ip_finish_output+0x401/0xa50
[   56.410706]  ip_finish_output+0x27/0x170
[   56.414772]  ip_output+0x1c6/0x560
[   56.418304]  ? ip_mc_output+0xd10/0xd10
[   56.422268]  ? __ip_finish_output+0xa50/0xa50
[   56.426756]  ? rcu_read_lock_held_common+0x170/0x170
[   56.431843]  ? rcu_read_lock_held+0x9c/0xb0
[   56.436151]  ip_local_out+0x7e/0x130
[   56.439849]  __ip_queue_xmit+0x6f6/0x1de0
[   56.443976]  ? __skb_checksum+0x7c0/0x7c0
[   56.448106]  ? skb_send_sock_locked+0x750/0x750
[   56.452773]  ? reqsk_fastopen_remove+0x560/0x560
[   56.457511]  ? dccp_insert_options+0x1e2/0xb20
[   56.462096]  ip_queue_xmit+0x45/0x70
[   56.465810]  dccp_transmit_skb+0xb76/0x12a0
[   56.470131]  dccp_xmit_packet+0x1a0/0x580
[   56.474280]  dccp_write_xmit+0x128/0x180
[   56.478326]  dccp_sendmsg+0x68f/0xdb0
[   56.482130]  ? aa_sk_perm+0x182/0x740
[   56.485917]  ? dccp_disconnect+0xa90/0xa90
[   56.490138]  ? aa_af_perm+0x240/0x240
[   56.493967]  inet_sendmsg+0xbd/0xe0
[   56.497578]  ? inet_send_prepare+0x3a0/0x3a0
[   56.501967]  sock_sendmsg+0xdf/0x110
[   56.505665]  ____sys_sendmsg+0x687/0xae0
[   56.509725]  ? copy_msghdr_from_user+0x20d/0x3f0
[   56.514483]  ? kernel_sendmsg+0x30/0x30
[   56.518472]  ? __fget+0x2ae/0x440
[   56.521916]  ___sys_sendmsg+0xe4/0x160
[   56.525790]  ? sendmsg_copy_msghdr+0x30/0x30
[   56.530181]  ? rcu_read_lock_held+0x9c/0xb0
[   56.534483]  ? rcu_read_lock_held_common+0x170/0x170
[   56.539575]  ? __fget+0x2c8/0x440
[   56.543019]  ? __x64_sys_dup2+0x2e0/0x2e0
[   56.547164]  ? lock_downgrade+0x900/0x900
[   56.551301]  ? __fget_light+0x17f/0x1f0
[   56.555259]  ? __fdget+0xe/0x10
[   56.558528]  __sys_sendmsg+0xd9/0x180
[   56.562319]  ? __sys_sendmsg_sock+0xa0/0xa0
[   56.566632]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   56.571892]  ? __sched_text_start+0x8/0x8
[   56.576332]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   56.581685]  __x64_sys_sendmsg+0x73/0xb0
[   56.585731]  do_syscall_64+0xd0/0x600
[   56.589516]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   56.594689] RIP: 0033:0x452f89
[   56.597868] 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
[   56.616750] RSP: 002b:00007feddfc49c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   56.624448] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   56.631700] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   56.638952] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   56.646205] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   56.653456] R13: 00000000ffffffff R14: 00007feddfc4a6d4 R15: 0000000000000002
[   56.660733] CPU: 1 PID: 4933 Comm: syz-executor4 Not tainted 5.5.0-rc6-syzkaller #0
[   56.668519] dccp_close: ABORT with 24 bytes unread
[   56.668633] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   56.682380] dccp_close: ABORT with 24 bytes unread
[   56.683012] Call Trace:
[   56.683018]  <IRQ>
[   56.683030]  dump_stack+0x12f/0x187
[   56.683052]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   56.683067]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   56.683075]  ? dccp_parse_options+0x333/0x1000
[   56.683096]  dccp_deliver_input_to_ccids+0xcc/0x220
[   56.683108]  dccp_rcv_established+0x49/0x70
[   56.683116]  dccp_v4_do_rcv+0xf4/0x160
[   56.683129]  __sk_receive_skb+0x2b6/0x9e0
[   56.683145]  ? sk_free+0x60/0x60
[   56.683154]  ? dccp_invalid_packet+0x3ec/0x750
[   56.683171]  dccp_v4_rcv+0xc22/0x1c0b
[   56.693764] 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()
[   56.696582]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   56.696602]  ip_local_deliver_finish+0x1ee/0x2e0
[   56.696616]  ip_local_deliver+0x306/0x450
[   56.696627]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   56.696634]  ? lock_downgrade+0x900/0x900
[   56.775949]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   56.780875]  ip_rcv_finish+0xb0/0x170
[   56.784663]  ip_rcv+0xcb/0x2f0
[   56.787841]  ? ip_local_deliver+0x450/0x450
[   56.792148]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   56.797499]  ? ip_local_deliver+0x450/0x450
[   56.801806]  __netif_receive_skb_one_core+0x132/0x190
[   56.806981]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   56.812170]  ? lock_acquire+0x194/0x3e0
[   56.816139]  ? process_backlog+0x182/0x6d0
[   56.820363]  __netif_receive_skb+0x1f/0x1b0
[   56.824687]  process_backlog+0x1cb/0x6d0
[   56.828748]  ? __do_softirq+0x248/0x94c
[   56.832725]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   56.837307]  net_rx_action+0x42d/0xde0
[   56.841186]  ? mark_lock+0xc5/0x1200
[   56.844894]  ? napi_busy_loop+0x6e0/0x6e0
[   56.849030]  ? rcu_is_watching+0x31/0x80
[   56.853084]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   56.857912]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   56.863181]  ? __do_softirq+0x1d9/0x94c
[   56.867137]  ? ip_finish_output2+0x709/0x22a0
[   56.871619]  ? trace_hardirqs_on+0x28/0x180
[   56.875933]  __do_softirq+0x248/0x94c
[   56.879729]  ? ip_finish_output2+0x709/0x22a0
[   56.884227]  do_softirq_own_stack+0x2a/0x40
[   56.888529]  </IRQ>
[   56.890756]  do_softirq.part.17+0x11a/0x150
[   56.895407]  __local_bh_enable_ip+0x1ee/0x230
[   56.899888]  ip_finish_output2+0x72d/0x22a0
[   56.904206]  ? ip_frag_next+0xa10/0xa10
[   56.908179]  ? rcu_read_lock_held+0x9c/0xb0
[   56.912507]  ? rcu_read_lock_held_common+0x170/0x170
[   56.917606]  __ip_finish_output+0x401/0xa50
[   56.921914]  ? __ip_finish_output+0x401/0xa50
[   56.926402]  ip_finish_output+0x27/0x170
[   56.930454]  ip_output+0x1c6/0x560
[   56.933981]  ? ip_mc_output+0xd10/0xd10
[   56.937945]  ? __ip_finish_output+0xa50/0xa50
[   56.942422]  ? rcu_read_lock_held_common+0x170/0x170
[   56.947507]  ? rcu_read_lock_held+0x9c/0xb0
[   56.951816]  ip_local_out+0x7e/0x130
[   56.955530]  __ip_queue_xmit+0x6f6/0x1de0
[   56.959671]  ? __skb_checksum+0x7c0/0x7c0
[   56.963817]  ? skb_send_sock_locked+0x750/0x750
[   56.968480]  ? reqsk_fastopen_remove+0x560/0x560
[   56.973221]  ? dccp_insert_options+0x1e2/0xb20
[   56.977812]  ip_queue_xmit+0x45/0x70
[   56.981517]  dccp_transmit_skb+0xb76/0x12a0
[   56.985839]  dccp_xmit_packet+0x1a0/0x580
[   56.990000]  dccp_write_xmit+0x128/0x180
[   56.994050]  dccp_sendmsg+0x68f/0xdb0
[   56.997837]  ? aa_sk_perm+0x182/0x740
[   57.001624]  ? dccp_disconnect+0xa90/0xa90
[   57.005845]  ? aa_af_perm+0x240/0x240
[   57.009648]  inet_sendmsg+0xbd/0xe0
[   57.013266]  ? inet_send_prepare+0x3a0/0x3a0
[   57.017655]  sock_sendmsg+0xdf/0x110
[   57.021354]  ____sys_sendmsg+0x687/0xae0
[   57.025423]  ? copy_msghdr_from_user+0x20d/0x3f0
[   57.030165]  ? kernel_sendmsg+0x30/0x30
[   57.034142]  ? __fget+0x2ae/0x440
[   57.037597]  ___sys_sendmsg+0xe4/0x160
[   57.041468]  ? sendmsg_copy_msghdr+0x30/0x30
[   57.045859]  ? rcu_read_lock_held+0x9c/0xb0
[   57.050163]  ? rcu_read_lock_held_common+0x170/0x170
[   57.055261]  ? __fget+0x2c8/0x440
[   57.058703]  ? __x64_sys_dup2+0x2e0/0x2e0
[   57.062833]  ? lock_downgrade+0x900/0x900
[   57.066974]  ? __fget_light+0x17f/0x1f0
[   57.070932]  ? __fdget+0xe/0x10
[   57.074205]  __sys_sendmsg+0xd9/0x180
[   57.077989]  ? __sys_sendmsg_sock+0xa0/0xa0
[   57.082304]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   57.087674]  ? __sched_text_start+0x8/0x8
[   57.091833]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   57.097223]  __x64_sys_sendmsg+0x73/0xb0
[   57.101278]  do_syscall_64+0xd0/0x600
[   57.105089]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   57.110265] RIP: 0033:0x452f89
[   57.113449] 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
[   57.132339] RSP: 002b:00007fceb6132c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   57.140031] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   57.147723] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   57.154978] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   57.162230] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   57.169483] R13: 00000000ffffffff R14: 00007fceb61336d4 R15: 0000000000000002
[   57.176762] CPU: 0 PID: 4937 Comm: syz-executor Not tainted 5.5.0-rc6-syzkaller #0
[   57.184491] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   57.193835] Call Trace:
[   57.196400]  <IRQ>
[   57.198538]  dump_stack+0x12f/0x187
[   57.202156]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   57.207346]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   57.212098]  ? dccp_parse_options+0x333/0x1000
[   57.216674]  dccp_deliver_input_to_ccids+0xcc/0x220
[   57.221809]  dccp_rcv_established+0x49/0x70
[   57.226130]  dccp_v4_do_rcv+0xf4/0x160
[   57.230017]  __sk_receive_skb+0x2b6/0x9e0
[   57.234170]  ? sk_free+0x60/0x60
[   57.237530]  ? dccp_invalid_packet+0x3ec/0x750
[   57.242106]  dccp_v4_rcv+0xc22/0x1c0b
[   57.245922]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   57.250675]  ip_local_deliver_finish+0x1ee/0x2e0
[   57.255419]  ip_local_deliver+0x306/0x450
[   57.259554]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   57.264464]  ? lock_downgrade+0x900/0x900
[   57.268593]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   57.273527]  ip_rcv_finish+0xb0/0x170
[   57.277316]  ip_rcv+0xcb/0x2f0
[   57.280490]  ? ip_local_deliver+0x450/0x450
[   57.284808]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   57.290173]  ? ip_local_deliver+0x450/0x450
[   57.294478]  __netif_receive_skb_one_core+0x132/0x190
[   57.299649]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   57.304821]  ? lock_acquire+0x194/0x3e0
[   57.308775]  ? process_backlog+0x182/0x6d0
[   57.312994]  __netif_receive_skb+0x1f/0x1b0
[   57.317312]  process_backlog+0x1cb/0x6d0
[   57.321354]  ? __do_softirq+0x248/0x94c
[   57.325311]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   57.329887]  net_rx_action+0x42d/0xde0
[   57.333756]  ? mark_lock+0xc5/0x1200
[   57.337456]  ? napi_busy_loop+0x6e0/0x6e0
[   57.341588]  ? rcu_is_watching+0x31/0x80
[   57.345649]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   57.350476]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   57.355735]  ? __do_softirq+0x1d9/0x94c
[   57.359686]  ? ip_finish_output2+0x709/0x22a0
[   57.364164]  ? trace_hardirqs_on+0x28/0x180
[   57.368484]  __do_softirq+0x248/0x94c
[   57.372275]  ? ip_finish_output2+0x709/0x22a0
[   57.376767]  do_softirq_own_stack+0x2a/0x40
[   57.381068]  </IRQ>
[   57.383287]  do_softirq.part.17+0x11a/0x150
[   57.387677]  __local_bh_enable_ip+0x1ee/0x230
[   57.392161]  ip_finish_output2+0x72d/0x22a0
[   57.396485]  ? ip_frag_next+0xa10/0xa10
[   57.400455]  ? rcu_read_lock_held+0x9c/0xb0
[   57.404781]  ? rcu_read_lock_held_common+0x170/0x170
[   57.409898]  __ip_finish_output+0x401/0xa50
[   57.414210]  ? __ip_finish_output+0x401/0xa50
[   57.418701]  ip_finish_output+0x27/0x170
[   57.424422]  ip_output+0x1c6/0x560
[   57.427955]  ? ip_mc_output+0xd10/0xd10
[   57.431919]  ? __ip_finish_output+0xa50/0xa50
[   57.436416]  ? rcu_read_lock_held_common+0x170/0x170
[   57.441505]  ? rcu_read_lock_held+0x9c/0xb0
[   57.445816]  ip_local_out+0x7e/0x130
[   57.449524]  __ip_queue_xmit+0x6f6/0x1de0
[   57.453652]  ? __skb_checksum+0x7c0/0x7c0
[   57.457782]  ? skb_send_sock_locked+0x750/0x750
[   57.462443]  ? reqsk_fastopen_remove+0x560/0x560
[   57.467179]  ? dccp_insert_options+0x1e2/0xb20
[   57.471756]  ip_queue_xmit+0x45/0x70
[   57.475468]  dccp_transmit_skb+0xb76/0x12a0
[   57.479814]  dccp_xmit_packet+0x1a0/0x580
[   57.483964]  dccp_write_xmit+0x128/0x180
[   57.488022]  dccp_sendmsg+0x68f/0xdb0
[   57.491845]  ? aa_sk_perm+0x182/0x740
[   57.495665]  ? dccp_disconnect+0xa90/0xa90
[   57.499884]  ? aa_af_perm+0x240/0x240
[   57.503686]  inet_sendmsg+0xbd/0xe0
[   57.507317]  ? inet_send_prepare+0x3a0/0x3a0
[   57.511709]  sock_sendmsg+0xdf/0x110
[   57.515409]  ____sys_sendmsg+0x687/0xae0
[   57.519456]  ? copy_msghdr_from_user+0x20d/0x3f0
[   57.524196]  ? kernel_sendmsg+0x30/0x30
[   57.528156]  ? __fget+0x2ae/0x440
[   57.531601]  ___sys_sendmsg+0xe4/0x160
[   57.535471]  ? sendmsg_copy_msghdr+0x30/0x30
[   57.539861]  ? rcu_read_lock_held+0x9c/0xb0
[   57.544163]  ? rcu_read_lock_held_common+0x170/0x170
[   57.549246]  ? find_held_lock+0x36/0x1d0
[   57.553312]  ? __fget+0x2c8/0x440
[   57.556754]  ? __x64_sys_dup2+0x2e0/0x2e0
[   57.560886]  ? trace_hardirqs_on+0x28/0x180
[   57.565190]  ? release_sock+0x122/0x180
[   57.569152]  ? __fget_light+0x17f/0x1f0
[   57.573555]  ? _raw_spin_unlock_bh+0x2b/0x30
[   57.577953]  ? __fdget+0xe/0x10
[   57.581221]  __sys_sendmsg+0xd9/0x180
[   57.585011]  ? __sys_sendmsg_sock+0xa0/0xa0
[   57.589321]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   57.594605]  ? __sys_listen+0x1e8/0x230
[   57.598593]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   57.604032]  __x64_sys_sendmsg+0x73/0xb0
[   57.608087]  do_syscall_64+0xd0/0x600
[   57.611880]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   57.617332] RIP: 0033:0x452f89
[   57.620508] 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
[   57.639392] RSP: 002b:00007f75c30edc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   57.647100] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   57.654352] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   57.661614] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   57.668865] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   57.676129] R13: 00000000ffffffff R14: 00007f75c30ee6d4 R15: 0000000000000002
[   57.692907] dccp_close: ABORT with 24 bytes unread
[   57.698374] dccp_close: ABORT with 24 bytes unread
[   57.699165] dccp_close: ABORT with 24 bytes unread
[   57.745084] 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()
[   57.758524] CPU: 1 PID: 4956 Comm: syz-executor3 Not tainted 5.5.0-rc6-syzkaller #0
[   57.766333] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   57.775726] Call Trace:
[   57.778320]  <IRQ>
[   57.780474]  dump_stack+0x12f/0x187
[   57.784111]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   57.784194] 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()
[   57.789301]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   57.789307]  ? dccp_parse_options+0x333/0x1000
[   57.789328]  dccp_deliver_input_to_ccids+0xcc/0x220
[   57.789339]  dccp_rcv_established+0x49/0x70
[   57.789348]  dccp_v4_do_rcv+0xf4/0x160
[   57.789362]  __sk_receive_skb+0x2b6/0x9e0
[   57.789379]  ? sk_free+0x60/0x60
[   57.789387]  ? dccp_invalid_packet+0x3ec/0x750
[   57.789404]  dccp_v4_rcv+0xc22/0x1c0b
[   57.840943]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   57.845693]  ip_local_deliver_finish+0x1ee/0x2e0
[   57.850438]  ip_local_deliver+0x306/0x450
[   57.854570]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   57.859484]  ? lock_downgrade+0x900/0x900
[   57.863622]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   57.868547]  ip_rcv_finish+0xb0/0x170
[   57.872336]  ip_rcv+0xcb/0x2f0
[   57.875537]  ? ip_local_deliver+0x450/0x450
[   57.879848]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   57.885213]  ? ip_local_deliver+0x450/0x450
[   57.889536]  __netif_receive_skb_one_core+0x132/0x190
[   57.894740]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   57.899940]  ? lock_acquire+0x194/0x3e0
[   57.903921]  ? process_backlog+0x182/0x6d0
[   57.908184]  __netif_receive_skb+0x1f/0x1b0
[   57.912498]  process_backlog+0x1cb/0x6d0
[   57.916547]  ? __do_softirq+0x248/0x94c
[   57.920527]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   57.925112]  net_rx_action+0x42d/0xde0
[   57.928986]  ? mark_lock+0xc5/0x1200
[   57.932702]  ? napi_busy_loop+0x6e0/0x6e0
[   57.936855]  ? rcu_is_watching+0x31/0x80
[   57.940903]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   57.945728]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   57.950996]  ? __do_softirq+0x1d9/0x94c
[   57.954954]  ? ip_finish_output2+0x709/0x22a0
[   57.959445]  ? trace_hardirqs_on+0x28/0x180
[   57.963754]  __do_softirq+0x248/0x94c
[   57.967549]  ? ip_finish_output2+0x709/0x22a0
[   57.972047]  do_softirq_own_stack+0x2a/0x40
[   57.976347]  </IRQ>
[   57.978585]  do_softirq.part.17+0x11a/0x150
[   57.982888]  __local_bh_enable_ip+0x1ee/0x230
[   57.987366]  ip_finish_output2+0x72d/0x22a0
[   57.991680]  ? ip_frag_next+0xa10/0xa10
[   57.995639]  ? rcu_read_lock_held+0x9c/0xb0
[   57.999943]  ? rcu_read_lock_held_common+0x170/0x170
[   58.005037]  __ip_finish_output+0x401/0xa50
[   58.009340]  ? __ip_finish_output+0x401/0xa50
[   58.013825]  ip_finish_output+0x27/0x170
[   58.017883]  ip_output+0x1c6/0x560
[   58.021546]  ? ip_mc_output+0xd10/0xd10
[   58.025523]  ? __ip_finish_output+0xa50/0xa50
[   58.030012]  ? rcu_read_lock_held_common+0x170/0x170
[   58.035120]  ? rcu_read_lock_held+0x9c/0xb0
[   58.039440]  ip_local_out+0x7e/0x130
[   58.043278]  __ip_queue_xmit+0x6f6/0x1de0
[   58.047513]  ? __skb_checksum+0x7c0/0x7c0
[   58.051750]  ? skb_send_sock_locked+0x750/0x750
[   58.056409]  ? reqsk_fastopen_remove+0x560/0x560
[   58.061212]  ? dccp_insert_options+0x1e2/0xb20
[   58.065807]  ip_queue_xmit+0x45/0x70
[   58.069517]  dccp_transmit_skb+0xb76/0x12a0
[   58.073847]  dccp_xmit_packet+0x1a0/0x580
[   58.077982]  dccp_write_xmit+0x128/0x180
[   58.082048]  dccp_sendmsg+0x68f/0xdb0
[   58.086806]  ? aa_sk_perm+0x182/0x740
[   58.090625]  ? dccp_disconnect+0xa90/0xa90
[   58.094855]  ? aa_af_perm+0x240/0x240
[   58.098670]  inet_sendmsg+0xbd/0xe0
[   58.102287]  ? inet_send_prepare+0x3a0/0x3a0
[   58.106695]  sock_sendmsg+0xdf/0x110
[   58.110409]  ____sys_sendmsg+0x687/0xae0
[   58.114497]  ? copy_msghdr_from_user+0x20d/0x3f0
[   58.119270]  ? kernel_sendmsg+0x30/0x30
[   58.123254]  ? __fget+0x2ae/0x440
[   58.126744]  ___sys_sendmsg+0xe4/0x160
[   58.130623]  ? sendmsg_copy_msghdr+0x30/0x30
[   58.135026]  ? rcu_read_lock_held+0x9c/0xb0
[   58.139345]  ? rcu_read_lock_held_common+0x170/0x170
[   58.144801]  ? __fget+0x2c8/0x440
[   58.148258]  ? __x64_sys_dup2+0x2e0/0x2e0
[   58.152401]  ? lock_downgrade+0x900/0x900
[   58.156688]  ? __fget_light+0x17f/0x1f0
[   58.160664]  ? __fdget+0xe/0x10
[   58.164265]  __sys_sendmsg+0xd9/0x180
[   58.168057]  ? __sys_sendmsg_sock+0xa0/0xa0
[   58.172374]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   58.177643]  ? __sched_text_start+0x8/0x8
[   58.181801]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   58.187166]  __x64_sys_sendmsg+0x73/0xb0
[   58.191231]  do_syscall_64+0xd0/0x600
[   58.195025]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   58.200199] RIP: 0033:0x452f89
[   58.203391] 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
[   58.222279] RSP: 002b:00007f333aedcc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   58.229969] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   58.237219] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   58.244479] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   58.251750] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   58.259190] R13: 00000000ffffffff R14: 00007f333aedd6d4 R15: 0000000000000002
[   58.266478] CPU: 0 PID: 4955 Comm: syz-executor5 Not tainted 5.5.0-rc6-syzkaller #0
[   58.274280] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   58.283624] Call Trace:
[   58.286197]  <IRQ>
[   58.288347]  dump_stack+0x12f/0x187
[   58.292236]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   58.297416]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   58.302158]  ? dccp_parse_options+0x333/0x1000
[   58.306744]  dccp_deliver_input_to_ccids+0xcc/0x220
[   58.311862]  dccp_rcv_established+0x49/0x70
[   58.316173]  dccp_v4_do_rcv+0xf4/0x160
[   58.320054]  __sk_receive_skb+0x2b6/0x9e0
[   58.324203]  ? sk_free+0x60/0x60
[   58.327560]  ? dccp_invalid_packet+0x3ec/0x750
[   58.332149]  dccp_v4_rcv+0xc22/0x1c0b
[   58.336030]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   58.340916]  ip_local_deliver_finish+0x1ee/0x2e0
[   58.345678]  ip_local_deliver+0x306/0x450
[   58.349815]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   58.354733]  ? lock_downgrade+0x900/0x900
[   58.358883]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   58.363817]  ip_rcv_finish+0xb0/0x170
[   58.367728]  ip_rcv+0xcb/0x2f0
[   58.370906]  ? ip_local_deliver+0x450/0x450
[   58.375210]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   58.380672]  ? ip_local_deliver+0x450/0x450
[   58.385019]  __netif_receive_skb_one_core+0x132/0x190
[   58.390204]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   58.395383]  ? lock_acquire+0x194/0x3e0
[   58.399365]  ? process_backlog+0x182/0x6d0
[   58.403586]  __netif_receive_skb+0x1f/0x1b0
[   58.407892]  process_backlog+0x1cb/0x6d0
[   58.411947]  ? __do_softirq+0x248/0x94c
[   58.415972]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   58.420545]  net_rx_action+0x42d/0xde0
[   58.424432]  ? mark_lock+0xc5/0x1200
[   58.428146]  ? napi_busy_loop+0x6e0/0x6e0
[   58.432288]  ? rcu_is_watching+0x31/0x80
[   58.436342]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   58.441168]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   58.446432]  ? __do_softirq+0x1d9/0x94c
[   58.450393]  ? ip_finish_output2+0x709/0x22a0
[   58.454872]  ? trace_hardirqs_on+0x28/0x180
[   58.459193]  __do_softirq+0x248/0x94c
[   58.462986]  ? ip_finish_output2+0x709/0x22a0
[   58.467466]  do_softirq_own_stack+0x2a/0x40
[   58.471771]  </IRQ>
[   58.473993]  do_softirq.part.17+0x11a/0x150
[   58.478371]  __local_bh_enable_ip+0x1ee/0x230
[   58.482873]  ip_finish_output2+0x72d/0x22a0
[   58.487198]  ? ip_frag_next+0xa10/0xa10
[   58.491171]  ? rcu_read_lock_held+0x9c/0xb0
[   58.495480]  ? rcu_read_lock_held_common+0x170/0x170
[   58.500576]  __ip_finish_output+0x401/0xa50
[   58.504884]  ? __ip_finish_output+0x401/0xa50
[   58.509385]  ip_finish_output+0x27/0x170
[   58.513549]  ip_output+0x1c6/0x560
[   58.517095]  ? ip_mc_output+0xd10/0xd10
[   58.521065]  ? __ip_finish_output+0xa50/0xa50
[   58.525556]  ? rcu_read_lock_held_common+0x170/0x170
[   58.530657]  ? rcu_read_lock_held+0x9c/0xb0
[   58.534977]  ip_local_out+0x7e/0x130
[   58.538685]  __ip_queue_xmit+0x6f6/0x1de0
[   58.542933]  ? __skb_checksum+0x7c0/0x7c0
[   58.547230]  ? skb_send_sock_locked+0x750/0x750
[   58.551887]  ? reqsk_fastopen_remove+0x560/0x560
[   58.556637]  ? dccp_insert_options+0x1e2/0xb20
[   58.561348]  ip_queue_xmit+0x45/0x70
[   58.565048]  dccp_transmit_skb+0xb76/0x12a0
[   58.569365]  dccp_xmit_packet+0x1a0/0x580
[   58.573514]  dccp_write_xmit+0x128/0x180
[   58.577573]  dccp_sendmsg+0x68f/0xdb0
[   58.581361]  ? aa_sk_perm+0x182/0x740
[   58.585159]  ? dccp_disconnect+0xa90/0xa90
[   58.589403]  ? aa_af_perm+0x240/0x240
[   58.593208]  inet_sendmsg+0xbd/0xe0
[   58.596830]  ? inet_send_prepare+0x3a0/0x3a0
[   58.601221]  sock_sendmsg+0xdf/0x110
[   58.604932]  ____sys_sendmsg+0x687/0xae0
[   58.609004]  ? copy_msghdr_from_user+0x20d/0x3f0
[   58.613749]  ? kernel_sendmsg+0x30/0x30
[   58.617729]  ? __fget+0x2ae/0x440
[   58.621179]  ___sys_sendmsg+0xe4/0x160
[   58.625062]  ? sendmsg_copy_msghdr+0x30/0x30
[   58.629456]  ? rcu_read_lock_held+0x9c/0xb0
[   58.633764]  ? rcu_read_lock_held_common+0x170/0x170
[   58.638891]  ? __fget+0x2c8/0x440
[   58.642340]  ? __x64_sys_dup2+0x2e0/0x2e0
[   58.646475]  ? lock_downgrade+0x900/0x900
[   58.650628]  ? __fget_light+0x17f/0x1f0
[   58.654598]  ? __fdget+0xe/0x10
[   58.657874]  __sys_sendmsg+0xd9/0x180
[   58.661673]  ? __sys_sendmsg_sock+0xa0/0xa0
[   58.666870]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   58.672284]  ? __sched_text_start+0x8/0x8
[   58.676442]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   58.681799]  __x64_sys_sendmsg+0x73/0xb0
[   58.685849]  do_syscall_64+0xd0/0x600
[   58.689642]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   58.694815] RIP: 0033:0x452f89
[   58.697993] 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
[   58.716882] RSP: 002b:00007feddfc49c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   58.726053] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   58.733320] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   58.740571] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
2020/01/13 01:49:24 executed programs: 46
[   58.747823] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   58.755076] R13: 00000000ffffffff R14: 00007feddfc4a6d4 R15: 0000000000000002
[   58.846513] 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()
[   58.859839] CPU: 1 PID: 4985 Comm: syz-executor1 Not tainted 5.5.0-rc6-syzkaller #0
[   58.867635] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   58.876997] Call Trace:
[   58.879593]  <IRQ>
[   58.881756]  dump_stack+0x12f/0x187
[   58.885398]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   58.890600]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   58.895358]  ? dccp_parse_options+0x333/0x1000
[   58.900176]  dccp_deliver_input_to_ccids+0xcc/0x220
[   58.905199]  dccp_rcv_established+0x49/0x70
[   58.909537]  dccp_v4_do_rcv+0xf4/0x160
[   58.913431]  __sk_receive_skb+0x2b6/0x9e0
[   58.917586]  ? sk_free+0x60/0x60
[   58.920957]  ? dccp_invalid_packet+0x3ec/0x750
[   58.925556]  dccp_v4_rcv+0xc22/0x1c0b
[   58.929378]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   58.934157]  ip_local_deliver_finish+0x1ee/0x2e0
[   58.938920]  ip_local_deliver+0x306/0x450
[   58.943073]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   58.948001]  ? lock_downgrade+0x900/0x900
[   58.952154]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   58.957101]  ip_rcv_finish+0xb0/0x170
[   58.960917]  ip_rcv+0xcb/0x2f0
[   58.964116]  ? ip_local_deliver+0x450/0x450
[   58.968458]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   58.973838]  ? ip_local_deliver+0x450/0x450
[   58.978163]  __netif_receive_skb_one_core+0x132/0x190
[   58.983355]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   58.988554]  ? lock_acquire+0x194/0x3e0
[   58.992527]  ? process_backlog+0x182/0x6d0
[   58.996771]  __netif_receive_skb+0x1f/0x1b0
[   59.001107]  process_backlog+0x1cb/0x6d0
[   59.005168]  ? __do_softirq+0x248/0x94c
[   59.009169]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   59.013773]  net_rx_action+0x42d/0xde0
[   59.017665]  ? mark_lock+0xc5/0x1200
[   59.021391]  ? napi_busy_loop+0x6e0/0x6e0
[   59.025557]  ? rcu_is_watching+0x31/0x80
[   59.029629]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   59.033279] 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()
[   59.034561]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   59.034567]  ? __do_softirq+0x1d9/0x94c
[   59.034573]  ? ip_finish_output2+0x709/0x22a0
[   59.034580]  ? trace_hardirqs_on+0x28/0x180
[   59.034593]  __do_softirq+0x248/0x94c
[   59.034614]  ? ip_finish_output2+0x709/0x22a0
[   59.034626]  do_softirq_own_stack+0x2a/0x40
[   59.034631]  </IRQ>
[   59.034640]  do_softirq.part.17+0x11a/0x150
[   59.034648]  __local_bh_enable_ip+0x1ee/0x230
[   59.034656]  ip_finish_output2+0x72d/0x22a0
[   59.034674]  ? ip_frag_next+0xa10/0xa10
[   59.097669]  ? rcu_read_lock_held+0x9c/0xb0
[   59.101976]  ? rcu_read_lock_held_common+0x170/0x170
[   59.107071]  __ip_finish_output+0x401/0xa50
[   59.111381]  ? __ip_finish_output+0x401/0xa50
[   59.115873]  ip_finish_output+0x27/0x170
[   59.119936]  ip_output+0x1c6/0x560
[   59.123469]  ? ip_mc_output+0xd10/0xd10
[   59.127431]  ? __ip_finish_output+0xa50/0xa50
[   59.131914]  ? rcu_read_lock_held_common+0x170/0x170
[   59.137001]  ? rcu_read_lock_held+0x9c/0xb0
[   59.141308]  ip_local_out+0x7e/0x130
[   59.145008]  __ip_queue_xmit+0x6f6/0x1de0
[   59.149140]  ? __skb_checksum+0x7c0/0x7c0
[   59.153288]  ? skb_send_sock_locked+0x750/0x750
[   59.157943]  ? reqsk_fastopen_remove+0x560/0x560
[   59.162706]  ? dccp_insert_options+0x1e2/0xb20
[   59.167281]  ip_queue_xmit+0x45/0x70
[   59.170981]  dccp_transmit_skb+0xb76/0x12a0
[   59.175298]  dccp_xmit_packet+0x1a0/0x580
[   59.179447]  dccp_write_xmit+0x128/0x180
[   59.183497]  dccp_sendmsg+0x68f/0xdb0
[   59.187287]  ? aa_sk_perm+0x182/0x740
[   59.191076]  ? dccp_disconnect+0xa90/0xa90
[   59.195293]  ? aa_af_perm+0x240/0x240
[   59.199462]  inet_sendmsg+0xbd/0xe0
[   59.203073]  ? inet_send_prepare+0x3a0/0x3a0
[   59.207483]  sock_sendmsg+0xdf/0x110
[   59.211182]  ____sys_sendmsg+0x687/0xae0
[   59.215255]  ? copy_msghdr_from_user+0x20d/0x3f0
[   59.220010]  ? kernel_sendmsg+0x30/0x30
[   59.224020]  ? __fget+0x2ae/0x440
[   59.227484]  ___sys_sendmsg+0xe4/0x160
[   59.231362]  ? sendmsg_copy_msghdr+0x30/0x30
[   59.235755]  ? rcu_read_lock_held+0x9c/0xb0
[   59.240067]  ? rcu_read_lock_held_common+0x170/0x170
[   59.245155]  ? find_held_lock+0x36/0x1d0
[   59.249207]  ? __fget+0x2c8/0x440
[   59.252659]  ? __x64_sys_dup2+0x2e0/0x2e0
[   59.256802]  ? trace_hardirqs_on+0x28/0x180
[   59.261105]  ? release_sock+0x122/0x180
[   59.265068]  ? __fget_light+0x17f/0x1f0
[   59.269025]  ? _raw_spin_unlock_bh+0x2b/0x30
[   59.273429]  ? __fdget+0xe/0x10
[   59.276723]  __sys_sendmsg+0xd9/0x180
[   59.280524]  ? __sys_sendmsg_sock+0xa0/0xa0
[   59.284858]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   59.290116]  ? __sched_text_start+0x8/0x8
[   59.294256]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   59.299609]  __x64_sys_sendmsg+0x73/0xb0
[   59.303656]  do_syscall_64+0xd0/0x600
[   59.307445]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   59.312617] RIP: 0033:0x452f89
[   59.315791] 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
[   59.334682] RSP: 002b:00007fc466345c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   59.342370] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   59.349629] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   59.356986] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   59.364259] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   59.371512] R13: 00000000ffffffff R14: 00007fc4663466d4 R15: 0000000000000002
[   59.378796] CPU: 0 PID: 5020 Comm: syz-executor5 Not tainted 5.5.0-rc6-syzkaller #0
[   59.386603] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   59.395959] Call Trace:
[   59.398890]  <IRQ>
[   59.401043]  dump_stack+0x12f/0x187
[   59.404694]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   59.409898]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   59.414661]  ? dccp_parse_options+0x333/0x1000
[   59.419293]  dccp_deliver_input_to_ccids+0xcc/0x220
[   59.419298] 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()
[   59.437488]  dccp_rcv_established+0x49/0x70
[   59.441792]  dccp_v4_do_rcv+0xf4/0x160
[   59.445668]  __sk_receive_skb+0x2b6/0x9e0
[   59.449840]  ? sk_free+0x60/0x60
[   59.453189]  ? dccp_invalid_packet+0x3ec/0x750
[   59.457764]  dccp_v4_rcv+0xc22/0x1c0b
[   59.461594]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   59.466353]  ip_local_deliver_finish+0x1ee/0x2e0
[   59.471115]  ip_local_deliver+0x306/0x450
[   59.475246]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   59.480169]  ? lock_downgrade+0x900/0x900
[   59.484303]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   59.489237]  ip_rcv_finish+0xb0/0x170
[   59.493030]  ip_rcv+0xcb/0x2f0
[   59.496208]  ? ip_local_deliver+0x450/0x450
[   59.500515]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   59.505866]  ? ip_local_deliver+0x450/0x450
[   59.510170]  __netif_receive_skb_one_core+0x132/0x190
[   59.515358]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   59.520532]  ? lock_acquire+0x194/0x3e0
[   59.524489]  ? process_backlog+0x182/0x6d0
[   59.528726]  __netif_receive_skb+0x1f/0x1b0
[   59.533033]  process_backlog+0x1cb/0x6d0
[   59.537078]  ? __do_softirq+0x248/0x94c
[   59.541035]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   59.545644]  net_rx_action+0x42d/0xde0
[   59.549539]  ? mark_lock+0xc5/0x1200
[   59.553252]  ? napi_busy_loop+0x6e0/0x6e0
[   59.557388]  ? rcu_is_watching+0x31/0x80
[   59.561465]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   59.566295]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   59.571557]  ? __do_softirq+0x1d9/0x94c
[   59.575516]  ? ip_finish_output2+0x709/0x22a0
[   59.579996]  ? trace_hardirqs_on+0x28/0x180
[   59.584308]  __do_softirq+0x248/0x94c
[   59.588100]  ? ip_finish_output2+0x709/0x22a0
[   59.592581]  do_softirq_own_stack+0x2a/0x40
[   59.596914]  </IRQ>
[   59.599161]  do_softirq.part.17+0x11a/0x150
[   59.604076]  __local_bh_enable_ip+0x1ee/0x230
[   59.608570]  ip_finish_output2+0x72d/0x22a0
[   59.612890]  ? ip_frag_next+0xa10/0xa10
[   59.616857]  ? rcu_read_lock_held+0x9c/0xb0
[   59.621192]  ? rcu_read_lock_held_common+0x170/0x170
[   59.626298]  __ip_finish_output+0x401/0xa50
[   59.630616]  ? __ip_finish_output+0x401/0xa50
[   59.635123]  ip_finish_output+0x27/0x170
[   59.639174]  ip_output+0x1c6/0x560
[   59.642719]  ? ip_mc_output+0xd10/0xd10
[   59.646683]  ? __ip_finish_output+0xa50/0xa50
[   59.651163]  ? rcu_read_lock_held_common+0x170/0x170
[   59.656254]  ? rcu_read_lock_held+0x9c/0xb0
[   59.660594]  ip_local_out+0x7e/0x130
[   59.664300]  __ip_queue_xmit+0x6f6/0x1de0
[   59.668431]  ? __skb_checksum+0x7c0/0x7c0
[   59.672562]  ? skb_send_sock_locked+0x750/0x750
[   59.677214]  ? reqsk_fastopen_remove+0x560/0x560
[   59.681957]  ? dccp_insert_options+0x1e2/0xb20
[   59.686540]  ip_queue_xmit+0x45/0x70
[   59.690261]  dccp_transmit_skb+0xb76/0x12a0
[   59.694577]  dccp_xmit_packet+0x1a0/0x580
[   59.698715]  dccp_write_xmit+0x128/0x180
[   59.702764]  dccp_sendmsg+0x68f/0xdb0
[   59.706550]  ? aa_sk_perm+0x182/0x740
[   59.710364]  ? dccp_disconnect+0xa90/0xa90
[   59.714588]  ? aa_af_perm+0x240/0x240
[   59.718394]  inet_sendmsg+0xbd/0xe0
[   59.722100]  ? inet_send_prepare+0x3a0/0x3a0
[   59.726495]  sock_sendmsg+0xdf/0x110
[   59.730209]  ____sys_sendmsg+0x687/0xae0
[   59.734268]  ? copy_msghdr_from_user+0x20d/0x3f0
[   59.739048]  ? kernel_sendmsg+0x30/0x30
[   59.743018]  ? __fget+0x2ae/0x440
[   59.746466]  ___sys_sendmsg+0xe4/0x160
[   59.750341]  ? sendmsg_copy_msghdr+0x30/0x30
[   59.754737]  ? rcu_read_lock_held+0x9c/0xb0
[   59.759045]  ? rcu_read_lock_held_common+0x170/0x170
[   59.764142]  ? find_held_lock+0x36/0x1d0
[   59.768193]  ? __fget+0x2c8/0x440
[   59.771635]  ? __x64_sys_dup2+0x2e0/0x2e0
[   59.775766]  ? trace_hardirqs_on+0x28/0x180
[   59.780071]  ? release_sock+0x122/0x180
[   59.784035]  ? __fget_light+0x17f/0x1f0
[   59.787997]  ? _raw_spin_unlock_bh+0x2b/0x30
[   59.792400]  ? __fdget+0xe/0x10
[   59.795712]  __sys_sendmsg+0xd9/0x180
[   59.799496]  ? __sys_sendmsg_sock+0xa0/0xa0
[   59.803811]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   59.809069]  ? __sched_text_start+0x8/0x8
[   59.813234]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   59.818599]  __x64_sys_sendmsg+0x73/0xb0
[   59.822650]  do_syscall_64+0xd0/0x600
[   59.826455]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   59.831627] RIP: 0033:0x452f89
[   59.834818] 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
[   59.853700] RSP: 002b:00007feddfc49c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   59.862405] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   59.869677] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   59.876948] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   59.884338] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   59.891603] R13: 00000000ffffffff R14: 00007feddfc4a6d4 R15: 0000000000000002
[   59.898889] CPU: 1 PID: 5028 Comm: syz-executor4 Not tainted 5.5.0-rc6-syzkaller #0
[   59.902977] 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()
[   59.906698] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   59.906701] Call Trace:
[   59.906705]  <IRQ>
[   59.906716]  dump_stack+0x12f/0x187
[   59.906736]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   59.906749]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   59.948277]  ? dccp_parse_options+0x333/0x1000
[   59.952853]  dccp_deliver_input_to_ccids+0xcc/0x220
[   59.957858]  dccp_rcv_established+0x49/0x70
[   59.962165]  dccp_v4_do_rcv+0xf4/0x160
[   59.966039]  __sk_receive_skb+0x2b6/0x9e0
[   59.970176]  ? sk_free+0x60/0x60
[   59.973613]  ? dccp_invalid_packet+0x3ec/0x750
[   59.978186]  dccp_v4_rcv+0xc22/0x1c0b
[   59.982000]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   59.986747]  ip_local_deliver_finish+0x1ee/0x2e0
[   59.991489]  ip_local_deliver+0x306/0x450
[   59.995628]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   60.000552]  ? lock_downgrade+0x900/0x900
[   60.004702]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   60.009623]  ip_rcv_finish+0xb0/0x170
[   60.013408]  ip_rcv+0xcb/0x2f0
[   60.016589]  ? ip_local_deliver+0x450/0x450
[   60.020898]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   60.026269]  ? ip_local_deliver+0x450/0x450
[   60.030613]  __netif_receive_skb_one_core+0x132/0x190
[   60.035809]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   60.040994]  ? lock_acquire+0x194/0x3e0
[   60.044968]  ? process_backlog+0x182/0x6d0
[   60.049197]  __netif_receive_skb+0x1f/0x1b0
[   60.053529]  process_backlog+0x1cb/0x6d0
[   60.057586]  ? __do_softirq+0x248/0x94c
[   60.061543]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   60.066115]  net_rx_action+0x42d/0xde0
[   60.069994]  ? mark_lock+0xc5/0x1200
[   60.073712]  ? napi_busy_loop+0x6e0/0x6e0
[   60.077843]  ? rcu_is_watching+0x31/0x80
[   60.081892]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   60.086717]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   60.091983]  ? __do_softirq+0x1d9/0x94c
[   60.095956]  ? ip_finish_output2+0x709/0x22a0
[   60.100453]  ? trace_hardirqs_on+0x28/0x180
[   60.104762]  __do_softirq+0x248/0x94c
[   60.108552]  ? ip_finish_output2+0x709/0x22a0
[   60.113033]  do_softirq_own_stack+0x2a/0x40
[   60.117344]  </IRQ>
[   60.119568]  do_softirq.part.17+0x11a/0x150
[   60.123884]  __local_bh_enable_ip+0x1ee/0x230
[   60.128362]  ip_finish_output2+0x72d/0x22a0
[   60.132677]  ? ip_frag_next+0xa10/0xa10
[   60.136636]  ? rcu_read_lock_held+0x9c/0xb0
[   60.140942]  ? rcu_read_lock_held_common+0x170/0x170
[   60.146036]  __ip_finish_output+0x401/0xa50
[   60.150339]  ? __ip_finish_output+0x401/0xa50
[   60.154841]  ip_finish_output+0x27/0x170
[   60.159018]  ip_output+0x1c6/0x560
[   60.162553]  ? ip_mc_output+0xd10/0xd10
[   60.166518]  ? __ip_finish_output+0xa50/0xa50
[   60.170998]  ? rcu_read_lock_held_common+0x170/0x170
[   60.176088]  ? rcu_read_lock_held+0x9c/0xb0
[   60.180400]  ip_local_out+0x7e/0x130
[   60.184104]  __ip_queue_xmit+0x6f6/0x1de0
[   60.188771]  ? __skb_checksum+0x7c0/0x7c0
[   60.192901]  ? skb_send_sock_locked+0x750/0x750
[   60.197565]  ? reqsk_fastopen_remove+0x560/0x560
[   60.202302]  ? dccp_insert_options+0x1e2/0xb20
[   60.206878]  ip_queue_xmit+0x45/0x70
[   60.210581]  dccp_transmit_skb+0xb76/0x12a0
[   60.214908]  dccp_xmit_packet+0x1a0/0x580
[   60.219044]  dccp_write_xmit+0x128/0x180
[   60.223093]  dccp_sendmsg+0x68f/0xdb0
[   60.226888]  ? aa_sk_perm+0x182/0x740
[   60.230677]  ? dccp_disconnect+0xa90/0xa90
[   60.234897]  ? aa_af_perm+0x240/0x240
[   60.238697]  inet_sendmsg+0xbd/0xe0
[   60.242309]  ? inet_send_prepare+0x3a0/0x3a0
[   60.246704]  sock_sendmsg+0xdf/0x110
[   60.250425]  ____sys_sendmsg+0x687/0xae0
[   60.254471]  ? copy_msghdr_from_user+0x20d/0x3f0
[   60.259214]  ? kernel_sendmsg+0x30/0x30
[   60.263176]  ? __fget+0x2ae/0x440
[   60.266645]  ___sys_sendmsg+0xe4/0x160
[   60.270530]  ? sendmsg_copy_msghdr+0x30/0x30
[   60.274930]  ? rcu_read_lock_held+0x9c/0xb0
[   60.279282]  ? rcu_read_lock_held_common+0x170/0x170
[   60.284369]  ? find_held_lock+0x36/0x1d0
[   60.288434]  ? __fget+0x2c8/0x440
[   60.291890]  ? __x64_sys_dup2+0x2e0/0x2e0
[   60.296027]  ? trace_hardirqs_on+0x28/0x180
[   60.300340]  ? release_sock+0x122/0x180
[   60.304395]  ? __fget_light+0x17f/0x1f0
[   60.308366]  ? _raw_spin_unlock_bh+0x2b/0x30
[   60.312759]  ? __fdget+0xe/0x10
[   60.316032]  __sys_sendmsg+0xd9/0x180
[   60.319818]  ? __sys_sendmsg_sock+0xa0/0xa0
[   60.324136]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   60.329407]  ? __sys_listen+0x1e8/0x230
[   60.333379]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   60.338748]  __x64_sys_sendmsg+0x73/0xb0
[   60.342796]  do_syscall_64+0xd0/0x600
[   60.346584]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   60.351758] RIP: 0033:0x452f89
[   60.354949] 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
[   60.374453] RSP: 002b:00007fceb6132c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   60.382142] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   60.389395] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   60.396646] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   60.403898] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   60.411147] R13: 00000000ffffffff R14: 00007fceb61336d4 R15: 0000000000000002
[   60.418447] CPU: 0 PID: 5029 Comm: syz-executor2 Not tainted 5.5.0-rc6-syzkaller #0
[   60.426351] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   60.435703] Call Trace:
[   60.438273]  <IRQ>
[   60.440423]  dump_stack+0x12f/0x187
[   60.444043]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   60.449219]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   60.453963]  ? dccp_parse_options+0x333/0x1000
[   60.458538]  dccp_deliver_input_to_ccids+0xcc/0x220
[   60.463539]  dccp_rcv_established+0x49/0x70
[   60.467843]  dccp_v4_do_rcv+0xf4/0x160
[   60.471714]  __sk_receive_skb+0x2b6/0x9e0
[   60.475848]  ? sk_free+0x60/0x60
[   60.479208]  ? dccp_invalid_packet+0x3ec/0x750
[   60.483777]  dccp_v4_rcv+0xc22/0x1c0b
[   60.487575]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   60.492326]  ip_local_deliver_finish+0x1ee/0x2e0
[   60.497068]  ip_local_deliver+0x306/0x450
[   60.501198]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   60.506123]  ? lock_downgrade+0x900/0x900
[   60.510257]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   60.515175]  ip_rcv_finish+0xb0/0x170
[   60.518980]  ip_rcv+0xcb/0x2f0
[   60.522157]  ? ip_local_deliver+0x450/0x450
[   60.526463]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   60.531815]  ? ip_local_deliver+0x450/0x450
[   60.536727]  __netif_receive_skb_one_core+0x132/0x190
[   60.541900]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   60.547085]  ? lock_acquire+0x194/0x3e0
[   60.551041]  ? process_backlog+0x182/0x6d0
[   60.555263]  __netif_receive_skb+0x1f/0x1b0
[   60.559569]  process_backlog+0x1cb/0x6d0
[   60.563609]  ? __do_softirq+0x248/0x94c
[   60.567564]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   60.572136]  net_rx_action+0x42d/0xde0
[   60.576006]  ? mark_lock+0xc5/0x1200
[   60.579746]  ? napi_busy_loop+0x6e0/0x6e0
[   60.583884]  ? rcu_is_watching+0x31/0x80
[   60.587930]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   60.592758]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   60.598026]  ? __do_softirq+0x1d9/0x94c
[   60.601979]  ? ip_finish_output2+0x709/0x22a0
[   60.606473]  ? trace_hardirqs_on+0x28/0x180
[   60.610794]  __do_softirq+0x248/0x94c
[   60.614740]  ? ip_finish_output2+0x709/0x22a0
[   60.619223]  do_softirq_own_stack+0x2a/0x40
[   60.623787]  </IRQ>
[   60.626006]  do_softirq.part.17+0x11a/0x150
[   60.630324]  __local_bh_enable_ip+0x1ee/0x230
[   60.634804]  ip_finish_output2+0x72d/0x22a0
[   60.639119]  ? ip_frag_next+0xa10/0xa10
[   60.643077]  ? rcu_read_lock_held+0x9c/0xb0
[   60.647379]  ? rcu_read_lock_held_common+0x170/0x170
[   60.652470]  __ip_finish_output+0x401/0xa50
[   60.656780]  ? __ip_finish_output+0x401/0xa50
[   60.661263]  ip_finish_output+0x27/0x170
[   60.665306]  ip_output+0x1c6/0x560
[   60.668837]  ? ip_mc_output+0xd10/0xd10
[   60.672797]  ? __ip_finish_output+0xa50/0xa50
[   60.677276]  ? rcu_read_lock_held_common+0x170/0x170
[   60.682358]  ? rcu_read_lock_held+0x9c/0xb0
[   60.686673]  ip_local_out+0x7e/0x130
[   60.690382]  __ip_queue_xmit+0x6f6/0x1de0
[   60.694527]  ? __skb_checksum+0x7c0/0x7c0
[   60.698666]  ? skb_send_sock_locked+0x750/0x750
[   60.703337]  ? reqsk_fastopen_remove+0x560/0x560
[   60.708091]  ? dccp_insert_options+0x1e2/0xb20
[   60.712664]  ip_queue_xmit+0x45/0x70
[   60.716360]  dccp_transmit_skb+0xb76/0x12a0
[   60.720677]  dccp_xmit_packet+0x1a0/0x580
[   60.724808]  dccp_write_xmit+0x128/0x180
[   60.728858]  dccp_sendmsg+0x68f/0xdb0
[   60.732654]  ? aa_sk_perm+0x182/0x740
[   60.736445]  ? dccp_disconnect+0xa90/0xa90
[   60.740668]  ? aa_af_perm+0x240/0x240
[   60.744467]  inet_sendmsg+0xbd/0xe0
[   60.748089]  ? inet_send_prepare+0x3a0/0x3a0
[   60.752479]  sock_sendmsg+0xdf/0x110
[   60.756176]  ____sys_sendmsg+0x687/0xae0
[   60.760219]  ? copy_msghdr_from_user+0x20d/0x3f0
[   60.764961]  ? kernel_sendmsg+0x30/0x30
[   60.768922]  ? __fget+0x2ae/0x440
[   60.772363]  ___sys_sendmsg+0xe4/0x160
[   60.776232]  ? sendmsg_copy_msghdr+0x30/0x30
[   60.780621]  ? rcu_read_lock_held+0x9c/0xb0
[   60.784921]  ? rcu_read_lock_held_common+0x170/0x170
[   60.790004]  ? find_held_lock+0x36/0x1d0
[   60.794056]  ? __fget+0x2c8/0x440
[   60.797496]  ? __x64_sys_dup2+0x2e0/0x2e0
[   60.801641]  ? trace_hardirqs_on+0x28/0x180
[   60.805942]  ? release_sock+0x122/0x180
[   60.809907]  ? __fget_light+0x17f/0x1f0
[   60.813858]  ? _raw_spin_unlock_bh+0x2b/0x30
[   60.818249]  ? __fdget+0xe/0x10
[   60.821514]  __sys_sendmsg+0xd9/0x180
[   60.825296]  ? __sys_sendmsg_sock+0xa0/0xa0
[   60.829627]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   60.834880]  ? __sys_listen+0x1e8/0x230
[   60.838848]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   60.844197]  __x64_sys_sendmsg+0x73/0xb0
[   60.848240]  do_syscall_64+0xd0/0x600