Warning: Permanently added '10.128.0.204' (ECDSA) to the list of known hosts.
2019/12/11 07:30:56 parsed 1 programs
2019/12/11 07:30:56 executed programs: 0
[   50.634349] 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()
[   50.647788] CPU: 0 PID: 4772 Comm: syz-executor1 Not tainted 5.5.0-rc1-syzkaller #0
[   50.655590] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   50.665036] Call Trace:
[   50.667633]  <IRQ>
[   50.669802]  dump_stack+0x12f/0x187
[   50.673445]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   50.678648]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   50.683410]  ? dccp_parse_options+0x333/0x1000
[   50.688010]  dccp_deliver_input_to_ccids+0xcc/0x220
[   50.693072]  dccp_rcv_established+0x49/0x70
[   50.697411]  dccp_v4_do_rcv+0xf4/0x160
[   50.701309]  __sk_receive_skb+0x2b6/0x9e0
[   50.705470]  ? sk_free+0x60/0x60
[   50.708846]  ? dccp_invalid_packet+0x3ec/0x750
[   50.713447]  dccp_v4_rcv+0xc22/0x1c0b
[   50.717278]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   50.722051]  ip_local_deliver_finish+0x1ee/0x2e0
[   50.726820]  ip_local_deliver+0x306/0x450
[   50.728317] dccp_close: ABORT with 24 bytes unread
[   50.730973]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   50.730987]  ? lock_downgrade+0x900/0x900
[   50.730998]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   50.731018]  ip_rcv_finish+0xb0/0x170
[   50.753756]  ip_rcv+0xcb/0x2f0
[   50.756967]  ? ip_local_deliver+0x450/0x450
[   50.761303]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   50.766688]  ? ip_local_deliver+0x450/0x450
[   50.771031]  __netif_receive_skb_one_core+0x132/0x190
[   50.776238]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   50.779012] dccp_close: ABORT with 24 bytes unread
[   50.781430]  ? lock_acquire+0x194/0x3e0
[   50.781439]  ? process_backlog+0x182/0x6d0
[   50.781454]  __netif_receive_skb+0x1f/0x1b0
[   50.781466]  process_backlog+0x1cb/0x6d0
[   50.781473]  ? __do_softirq+0x248/0x94c
[   50.781479]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   50.801671] dccp_close: ABORT with 24 bytes unread
[   50.802985]  net_rx_action+0x42d/0xde0
[   50.803000]  ? mark_lock+0xc5/0x1200
[   50.803017]  ? napi_busy_loop+0x6e0/0x6e0
[   50.803024]  ? rcu_is_watching+0x31/0x80
[   50.832325]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   50.837182]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   50.842475]  ? __do_softirq+0x1d9/0x94c
[   50.843009] dccp_close: ABORT with 24 bytes unread
[   50.846456]  ? ip_finish_output2+0x709/0x22a0
[   50.846465]  ? trace_hardirqs_on+0x28/0x180
[   50.846482]  __do_softirq+0x248/0x94c
[   50.846502]  ? ip_finish_output2+0x709/0x22a0
[   50.846512]  do_softirq_own_stack+0x2a/0x40
[   50.846518]  </IRQ>
[   50.861990] 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()
[   50.864047]  do_softirq.part.17+0x11a/0x150
[   50.864056]  __local_bh_enable_ip+0x1ee/0x230
[   50.864068]  ip_finish_output2+0x72d/0x22a0
[   50.864090]  ? ip_frag_next+0xa10/0xa10
[   50.864101]  ? rcu_read_lock_held+0x9c/0xb0
[   50.864109]  ? rcu_read_lock_held_common+0x170/0x170
[   50.914804]  __ip_finish_output+0x401/0xa50
[   50.919122]  ? __ip_finish_output+0x401/0xa50
[   50.923605]  ip_finish_output+0x27/0x170
[   50.927650]  ip_output+0x1c6/0x560
[   50.931185]  ? ip_mc_output+0xd10/0xd10
[   50.935151]  ? __ip_finish_output+0xa50/0xa50
[   50.939639]  ? rcu_read_lock_held_common+0x170/0x170
[   50.944723]  ? rcu_read_lock_held+0x9c/0xb0
[   50.949030]  ip_local_out+0x7e/0x130
[   50.952744]  __ip_queue_xmit+0x6f6/0x1de0
[   50.956872]  ? __skb_checksum+0x7c0/0x7c0
[   50.961008]  ? skb_send_sock_locked+0x750/0x750
[   50.965657]  ? reqsk_fastopen_remove+0x560/0x560
[   50.970392]  ? dccp_insert_options+0x1e2/0xb20
[   50.974962]  ip_queue_xmit+0x45/0x70
[   50.978658]  dccp_transmit_skb+0xb76/0x12a0
[   50.982985]  dccp_xmit_packet+0x1a0/0x580
[   50.987119]  dccp_write_xmit+0x128/0x180
[   50.991182]  dccp_sendmsg+0x68f/0xdb0
[   50.994976]  ? aa_sk_perm+0x182/0x740
[   50.998762]  ? dccp_disconnect+0xa90/0xa90
[   51.002976]  ? aa_af_perm+0x240/0x240
[   51.007119]  inet_sendmsg+0xbd/0xe0
[   51.010847]  ? inet_send_prepare+0x3a0/0x3a0
[   51.015255]  sock_sendmsg+0xdf/0x110
[   51.018987]  ____sys_sendmsg+0x687/0xae0
[   51.023046]  ? copy_msghdr_from_user+0x20d/0x3f0
[   51.027828]  ? kernel_sendmsg+0x30/0x30
[   51.031797]  ? __fget+0x2ae/0x440
[   51.035416]  ___sys_sendmsg+0xe4/0x160
[   51.039314]  ? sendmsg_copy_msghdr+0x30/0x30
[   51.043720]  ? rcu_read_lock_held+0x9c/0xb0
[   51.048034]  ? rcu_read_lock_held_common+0x170/0x170
[   51.053124]  ? find_held_lock+0x36/0x1d0
[   51.057181]  ? __fget+0x2c8/0x440
[   51.060624]  ? __x64_sys_dup2+0x2e0/0x2e0
[   51.064754]  ? trace_hardirqs_on+0x28/0x180
[   51.069068]  ? release_sock+0x122/0x180
[   51.073030]  ? __fget_light+0x17f/0x1f0
[   51.076996]  ? _raw_spin_unlock_bh+0x2b/0x30
[   51.081388]  ? __fdget+0xe/0x10
[   51.084673]  __sys_sendmsg+0xd9/0x180
[   51.088467]  ? __sys_sendmsg_sock+0xa0/0xa0
[   51.092785]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   51.098072]  ? __sys_listen+0x1e8/0x230
[   51.102045]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   51.107395]  __x64_sys_sendmsg+0x73/0xb0
[   51.111441]  do_syscall_64+0xd0/0x600
[   51.115227]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   51.120395] RIP: 0033:0x452f89
[   51.123588] 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
[   51.142558] RSP: 002b:00007f549c3cdc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   51.150256] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   51.157506] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   51.164767] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   51.172033] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   51.179288] R13: 00000000ffffffff R14: 00007f549c3ce6d4 R15: 0000000000000002
[   51.186587] CPU: 1 PID: 4806 Comm: syz-executor4 Not tainted 5.5.0-rc1-syzkaller #0
[   51.194405] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.203805] Call Trace:
[   51.206391]  <IRQ>
[   51.209244]  dump_stack+0x12f/0x187
[   51.212882]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   51.218084]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   51.221202] dccp_close: ABORT with 24 bytes unread
[   51.222854]  ? dccp_parse_options+0x333/0x1000
[   51.222875]  dccp_deliver_input_to_ccids+0xcc/0x220
[   51.222886]  dccp_rcv_established+0x49/0x70
[   51.222899]  dccp_v4_do_rcv+0xf4/0x160
[   51.222910]  __sk_receive_skb+0x2b6/0x9e0
[   51.249118] 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()
[   51.249759]  ? sk_free+0x60/0x60
[   51.249770]  ? dccp_invalid_packet+0x3ec/0x750
[   51.270856]  dccp_v4_rcv+0xc22/0x1c0b
[   51.274655]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   51.279398]  ip_local_deliver_finish+0x1ee/0x2e0
[   51.284137]  ip_local_deliver+0x306/0x450
[   51.288267]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   51.293198]  ? lock_downgrade+0x900/0x900
[   51.297338]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   51.302256]  ip_rcv_finish+0xb0/0x170
[   51.306044]  ip_rcv+0xcb/0x2f0
[   51.309221]  ? ip_local_deliver+0x450/0x450
[   51.313527]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   51.318877]  ? ip_local_deliver+0x450/0x450
[   51.323354]  __netif_receive_skb_one_core+0x132/0x190
[   51.328535]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   51.333708]  ? lock_acquire+0x194/0x3e0
[   51.337673]  ? process_backlog+0x182/0x6d0
[   51.341910]  __netif_receive_skb+0x1f/0x1b0
[   51.346213]  process_backlog+0x1cb/0x6d0
[   51.350254]  ? __do_softirq+0x248/0x94c
[   51.354212]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   51.358782]  net_rx_action+0x42d/0xde0
[   51.362650]  ? mark_lock+0xc5/0x1200
[   51.366348]  ? napi_busy_loop+0x6e0/0x6e0
[   51.370486]  ? rcu_is_watching+0x31/0x80
[   51.374534]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   51.379358]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   51.384613]  ? __do_softirq+0x1d9/0x94c
[   51.388570]  ? ip_finish_output2+0x709/0x22a0
[   51.393044]  ? trace_hardirqs_on+0x28/0x180
[   51.397348]  __do_softirq+0x248/0x94c
[   51.401140]  ? ip_finish_output2+0x709/0x22a0
[   51.405629]  do_softirq_own_stack+0x2a/0x40
[   51.409941]  </IRQ>
[   51.412163]  do_softirq.part.17+0x11a/0x150
[   51.419850]  __local_bh_enable_ip+0x1ee/0x230
[   51.424331]  ip_finish_output2+0x72d/0x22a0
[   51.428652]  ? ip_frag_next+0xa10/0xa10
[   51.432606]  ? rcu_read_lock_held+0x9c/0xb0
[   51.436909]  ? rcu_read_lock_held_common+0x170/0x170
[   51.441999]  __ip_finish_output+0x401/0xa50
[   51.446300]  ? __ip_finish_output+0x401/0xa50
[   51.450794]  ip_finish_output+0x27/0x170
[   51.454846]  ip_output+0x1c6/0x560
[   51.458373]  ? ip_mc_output+0xd10/0xd10
[   51.462333]  ? __ip_finish_output+0xa50/0xa50
[   51.466806]  ? rcu_read_lock_held_common+0x170/0x170
[   51.471890]  ? rcu_read_lock_held+0x9c/0xb0
[   51.476197]  ip_local_out+0x7e/0x130
[   51.479896]  __ip_queue_xmit+0x6f6/0x1de0
[   51.484021]  ? __skb_checksum+0x7c0/0x7c0
[   51.488167]  ? skb_send_sock_locked+0x750/0x750
[   51.492815]  ? reqsk_fastopen_remove+0x560/0x560
[   51.497551]  ? dccp_insert_options+0x1e2/0xb20
[   51.502133]  ip_queue_xmit+0x45/0x70
[   51.505830]  dccp_transmit_skb+0xb76/0x12a0
[   51.510151]  dccp_xmit_packet+0x1a0/0x580
[   51.514286]  dccp_write_xmit+0x128/0x180
[   51.518332]  dccp_sendmsg+0x68f/0xdb0
[   51.522130]  ? aa_sk_perm+0x182/0x740
[   51.525917]  ? dccp_disconnect+0xa90/0xa90
[   51.530160]  ? aa_af_perm+0x240/0x240
[   51.533959]  inet_sendmsg+0xbd/0xe0
[   51.537566]  ? inet_send_prepare+0x3a0/0x3a0
[   51.541957]  sock_sendmsg+0xdf/0x110
[   51.545664]  ____sys_sendmsg+0x687/0xae0
[   51.549968]  ? copy_msghdr_from_user+0x20d/0x3f0
[   51.554707]  ? kernel_sendmsg+0x30/0x30
[   51.558669]  ? __fget+0x2ae/0x440
[   51.562113]  ___sys_sendmsg+0xe4/0x160
[   51.565983]  ? sendmsg_copy_msghdr+0x30/0x30
[   51.570369]  ? rcu_read_lock_held+0x9c/0xb0
[   51.574673]  ? rcu_read_lock_held_common+0x170/0x170
[   51.579763]  ? find_held_lock+0x36/0x1d0
[   51.583822]  ? __fget+0x2c8/0x440
[   51.587268]  ? __x64_sys_dup2+0x2e0/0x2e0
[   51.591399]  ? trace_hardirqs_on+0x28/0x180
[   51.595701]  ? release_sock+0x122/0x180
[   51.599671]  ? __fget_light+0x17f/0x1f0
[   51.603628]  ? _raw_spin_unlock_bh+0x2b/0x30
[   51.608049]  ? __fdget+0xe/0x10
[   51.611363]  __sys_sendmsg+0xd9/0x180
[   51.615173]  ? __sys_sendmsg_sock+0xa0/0xa0
[   51.619493]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   51.624767]  ? __sys_listen+0x1e8/0x230
[   51.628773]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   51.634137]  __x64_sys_sendmsg+0x73/0xb0
[   51.638193]  do_syscall_64+0xd0/0x600
[   51.641978]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   51.647251] RIP: 0033:0x452f89
[   51.650427] 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
[   51.669309] RSP: 002b:00007ff96910dc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   51.677011] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   51.684274] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   51.691613] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   51.698874] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   51.706151] R13: 00000000ffffffff R14: 00007ff96910e6d4 R15: 0000000000000002
[   51.713441] CPU: 0 PID: 4813 Comm: syz-executor Not tainted 5.5.0-rc1-syzkaller #0
[   51.721159] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.730523] Call Trace:
[   51.733115]  <IRQ>
[   51.735393]  dump_stack+0x12f/0x187
[   51.739056]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   51.744253]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   51.744291] dccp_close: ABORT with 24 bytes unread
[   51.748996]  ? dccp_parse_options+0x333/0x1000
[   51.749016]  dccp_deliver_input_to_ccids+0xcc/0x220
[   51.749032]  dccp_rcv_established+0x49/0x70
[   51.749041]  dccp_v4_do_rcv+0xf4/0x160
[   51.749052]  __sk_receive_skb+0x2b6/0x9e0
[   51.775909]  ? sk_free+0x60/0x60
[   51.776319] dccp_close: ABORT with 24 bytes unread
[   51.779279]  ? dccp_invalid_packet+0x3ec/0x750
[   51.779298]  dccp_v4_rcv+0xc22/0x1c0b
[   51.779329]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   51.797407]  ip_local_deliver_finish+0x1ee/0x2e0
[   51.802188]  ip_local_deliver+0x306/0x450
[   51.806340]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   51.811272]  ? lock_downgrade+0x900/0x900
[   51.815426]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   51.818356] dccp_close: ABORT with 24 bytes unread
[   51.820364]  ip_rcv_finish+0xb0/0x170
[   51.820376]  ip_rcv+0xcb/0x2f0
[   51.820386]  ? ip_local_deliver+0x450/0x450
[   51.820398]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   51.839704] 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()
[   51.841954]  ? ip_local_deliver+0x450/0x450
[   51.841966]  __netif_receive_skb_one_core+0x132/0x190
[   51.841975]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   51.841987]  ? lock_acquire+0x194/0x3e0
[   51.873814]  ? process_backlog+0x182/0x6d0
[   51.878063]  __netif_receive_skb+0x1f/0x1b0
[   51.882398]  process_backlog+0x1cb/0x6d0
[   51.886442]  ? __do_softirq+0x248/0x94c
[   51.890403]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   51.894981]  net_rx_action+0x42d/0xde0
[   51.898855]  ? mark_lock+0xc5/0x1200
[   51.902555]  ? napi_busy_loop+0x6e0/0x6e0
[   51.906683]  ? rcu_is_watching+0x31/0x80
[   51.910733]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   51.915557]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   51.920822]  ? __do_softirq+0x1d9/0x94c
[   51.924778]  ? ip_finish_output2+0x709/0x22a0
[   51.929254]  ? trace_hardirqs_on+0x28/0x180
[   51.933562]  __do_softirq+0x248/0x94c
[   51.937371]  ? ip_finish_output2+0x709/0x22a0
[   51.941861]  do_softirq_own_stack+0x2a/0x40
[   51.946171]  </IRQ>
[   51.948396]  do_softirq.part.17+0x11a/0x150
[   51.952823]  __local_bh_enable_ip+0x1ee/0x230
[   51.957329]  ip_finish_output2+0x72d/0x22a0
[   51.962010]  ? ip_frag_next+0xa10/0xa10
[   51.965998]  ? rcu_read_lock_held+0x9c/0xb0
[   51.970840]  ? rcu_read_lock_held_common+0x170/0x170
[   51.975946]  __ip_finish_output+0x401/0xa50
[   51.980262]  ? __ip_finish_output+0x401/0xa50
[   51.984765]  ip_finish_output+0x27/0x170
[   51.988816]  ip_output+0x1c6/0x560
[   51.992341]  ? ip_mc_output+0xd10/0xd10
[   51.996306]  ? __ip_finish_output+0xa50/0xa50
[   52.000778]  ? rcu_read_lock_held_common+0x170/0x170
[   52.005863]  ? rcu_read_lock_held+0x9c/0xb0
[   52.010168]  ip_local_out+0x7e/0x130
[   52.014107]  __ip_queue_xmit+0x6f6/0x1de0
[   52.018244]  ? __skb_checksum+0x7c0/0x7c0
[   52.022383]  ? skb_send_sock_locked+0x750/0x750
[   52.027046]  ? reqsk_fastopen_remove+0x560/0x560
[   52.031801]  ? dccp_insert_options+0x1e2/0xb20
[   52.036373]  ip_queue_xmit+0x45/0x70
[   52.040069]  dccp_transmit_skb+0xb76/0x12a0
[   52.044445]  dccp_xmit_packet+0x1a0/0x580
[   52.048586]  dccp_write_xmit+0x128/0x180
[   52.052634]  dccp_sendmsg+0x68f/0xdb0
[   52.056419]  ? aa_sk_perm+0x182/0x740
[   52.060218]  ? dccp_disconnect+0xa90/0xa90
[   52.064440]  ? aa_af_perm+0x240/0x240
[   52.068241]  inet_sendmsg+0xbd/0xe0
[   52.071848]  ? inet_send_prepare+0x3a0/0x3a0
[   52.076239]  sock_sendmsg+0xdf/0x110
[   52.080061]  ____sys_sendmsg+0x687/0xae0
[   52.084109]  ? copy_msghdr_from_user+0x20d/0x3f0
[   52.088871]  ? kernel_sendmsg+0x30/0x30
[   52.092859]  ? __fget+0x2ae/0x440
[   52.096309]  ___sys_sendmsg+0xe4/0x160
[   52.100194]  ? sendmsg_copy_msghdr+0x30/0x30
[   52.104585]  ? rcu_read_lock_held+0x9c/0xb0
[   52.108902]  ? rcu_read_lock_held_common+0x170/0x170
[   52.113998]  ? __fget+0x2c8/0x440
[   52.117437]  ? __x64_sys_dup2+0x2e0/0x2e0
[   52.121577]  ? lock_downgrade+0x900/0x900
[   52.125716]  ? __fget_light+0x17f/0x1f0
[   52.129688]  ? __fdget+0xe/0x10
[   52.132971]  __sys_sendmsg+0xd9/0x180
[   52.136759]  ? __sys_sendmsg_sock+0xa0/0xa0
[   52.141079]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   52.146346]  ? __sched_text_start+0x8/0x8
[   52.150490]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   52.155844]  __x64_sys_sendmsg+0x73/0xb0
[   52.159897]  do_syscall_64+0xd0/0x600
[   52.163687]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   52.168858] RIP: 0033:0x452f89
[   52.172034] 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
[   52.190947] RSP: 002b:00007fcdd0c13c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   52.198645] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   52.205912] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   52.213162] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   52.220440] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   52.227710] R13: 00000000ffffffff R14: 00007fcdd0c146d4 R15: 0000000000000002
[   52.235019] CPU: 1 PID: 4827 Comm: syz-executor5 Not tainted 5.5.0-rc1-syzkaller #0
[   52.242067] dccp_close: ABORT with 24 bytes unread
[   52.242821] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   52.242825] Call Trace:
[   52.242829]  <IRQ>
[   52.242842]  dump_stack+0x12f/0x187
[   52.242862]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   52.242875]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   52.263373] dccp_close: ABORT with 24 bytes unread
[   52.263826]  dccp_deliver_input_to_ccids+0xcc/0x220
[   52.263837]  dccp_rcv_established+0x49/0x70
[   52.291769]  dccp_v4_do_rcv+0xf4/0x160
[   52.295672]  __sk_receive_skb+0x2b6/0x9e0
[   52.299839]  ? sk_free+0x60/0x60
[   52.303210]  ? dccp_invalid_packet+0x3ec/0x750
[   52.307816]  dccp_v4_rcv+0xc22/0x1c0b
[   52.311658]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   52.316430]  ip_local_deliver_finish+0x1ee/0x2e0
[   52.321191]  ip_local_deliver+0x306/0x450
[   52.325379]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   52.330315]  ? lock_downgrade+0x900/0x900
[   52.334482]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   52.339424]  ip_rcv_finish+0xb0/0x170
[   52.343228]  ip_rcv+0xcb/0x2f0
[   52.347123]  ? ip_local_deliver+0x450/0x450
[   52.351456]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   52.356831]  ? ip_local_deliver+0x450/0x450
[   52.361333]  __netif_receive_skb_one_core+0x132/0x190
[   52.364224] 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()
[   52.366559]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   52.366572]  ? lock_acquire+0x194/0x3e0
[   52.366577]  ? process_backlog+0x182/0x6d0
[   52.366591]  __netif_receive_skb+0x1f/0x1b0
[   52.366602]  process_backlog+0x1cb/0x6d0
[   52.366610]  ? __do_softirq+0x248/0x94c
[   52.366618]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   52.366634]  net_rx_action+0x42d/0xde0
[   52.414031]  ? mark_lock+0xc5/0x1200
[   52.417735]  ? napi_busy_loop+0x6e0/0x6e0
[   52.421863]  ? rcu_is_watching+0x31/0x80
[   52.425911]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   52.430736]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   52.435992]  ? __do_softirq+0x1d9/0x94c
[   52.439946]  ? ip_finish_output2+0x709/0x22a0
[   52.444423]  ? trace_hardirqs_on+0x28/0x180
[   52.448730]  __do_softirq+0x248/0x94c
[   52.452529]  ? ip_finish_output2+0x709/0x22a0
[   52.457144]  do_softirq_own_stack+0x2a/0x40
[   52.461474]  </IRQ>
[   52.463707]  do_softirq.part.17+0x11a/0x150
[   52.468243]  __local_bh_enable_ip+0x1ee/0x230
[   52.472729]  ip_finish_output2+0x72d/0x22a0
[   52.477053]  ? ip_frag_next+0xa10/0xa10
[   52.481055]  ? rcu_read_lock_held+0x9c/0xb0
[   52.485356]  ? rcu_read_lock_held_common+0x170/0x170
[   52.490457]  __ip_finish_output+0x401/0xa50
[   52.494757]  ? __ip_finish_output+0x401/0xa50
[   52.499248]  ip_finish_output+0x27/0x170
[   52.503292]  ip_output+0x1c6/0x560
[   52.506818]  ? ip_mc_output+0xd10/0xd10
[   52.510776]  ? __ip_finish_output+0xa50/0xa50
[   52.515250]  ? rcu_read_lock_held_common+0x170/0x170
[   52.520332]  ? rcu_read_lock_held+0x9c/0xb0
[   52.524637]  ip_local_out+0x7e/0x130
[   52.528336]  __ip_queue_xmit+0x6f6/0x1de0
[   52.532473]  ? __skb_checksum+0x7c0/0x7c0
[   52.536602]  ? skb_send_sock_locked+0x750/0x750
[   52.541249]  ? reqsk_fastopen_remove+0x560/0x560
[   52.546017]  ? dccp_insert_options+0x1e2/0xb20
[   52.550590]  ip_queue_xmit+0x45/0x70
[   52.554285]  dccp_transmit_skb+0xb76/0x12a0
[   52.558599]  dccp_xmit_packet+0x1a0/0x580
[   52.562733]  dccp_write_xmit+0x128/0x180
[   52.566776]  dccp_sendmsg+0x68f/0xdb0
[   52.570560]  ? aa_sk_perm+0x182/0x740
[   52.574355]  ? dccp_disconnect+0xa90/0xa90
[   52.578581]  ? aa_af_perm+0x240/0x240
[   52.582380]  inet_sendmsg+0xbd/0xe0
[   52.585992]  ? inet_send_prepare+0x3a0/0x3a0
[   52.590389]  sock_sendmsg+0xdf/0x110
[   52.594088]  ____sys_sendmsg+0x687/0xae0
[   52.598128]  ? copy_msghdr_from_user+0x20d/0x3f0
[   52.602867]  ? kernel_sendmsg+0x30/0x30
[   52.606826]  ? __fget+0x2ae/0x440
[   52.610280]  ___sys_sendmsg+0xe4/0x160
[   52.614150]  ? sendmsg_copy_msghdr+0x30/0x30
[   52.618541]  ? rcu_read_lock_held+0x9c/0xb0
[   52.622845]  ? rcu_read_lock_held_common+0x170/0x170
[   52.627926]  ? find_held_lock+0x36/0x1d0
[   52.632061]  ? __fget+0x2c8/0x440
[   52.635505]  ? __x64_sys_dup2+0x2e0/0x2e0
[   52.639634]  ? trace_hardirqs_on+0x28/0x180
[   52.643948]  ? release_sock+0x122/0x180
[   52.647911]  ? __fget_light+0x17f/0x1f0
[   52.651865]  ? _raw_spin_unlock_bh+0x2b/0x30
[   52.656257]  ? __fdget+0xe/0x10
[   52.659522]  __sys_sendmsg+0xd9/0x180
[   52.663303]  ? __sys_sendmsg_sock+0xa0/0xa0
[   52.667713]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   52.672978]  ? __sys_listen+0x1e8/0x230
[   52.676943]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   52.682293]  __x64_sys_sendmsg+0x73/0xb0
[   52.686340]  do_syscall_64+0xd0/0x600
[   52.690126]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   52.695292] RIP: 0033:0x452f89
[   52.698468] 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
[   52.717363] RSP: 002b:00007f89cb08ec58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   52.725059] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   52.732833] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   52.740085] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   52.747333] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   52.754595] R13: 00000000ffffffff R14: 00007f89cb08f6d4 R15: 0000000000000002
[   52.761881] CPU: 0 PID: 4844 Comm: syz-executor1 Not tainted 5.5.0-rc1-syzkaller #0
[   52.769693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   52.773275] 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()
[   52.779155] Call Trace:
[   52.779161]  <IRQ>
[   52.779174]  dump_stack+0x12f/0x187
[   52.779191]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   52.779206]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   52.779213]  ? dccp_parse_options+0x333/0x1000
[   52.779232]  dccp_deliver_input_to_ccids+0xcc/0x220
[   52.779249]  dccp_rcv_established+0x49/0x70
[   52.824554]  dccp_v4_do_rcv+0xf4/0x160
[   52.828426]  __sk_receive_skb+0x2b6/0x9e0
[   52.832560]  ? sk_free+0x60/0x60
[   52.835940]  ? dccp_invalid_packet+0x3ec/0x750
[   52.840540]  dccp_v4_rcv+0xc22/0x1c0b
[   52.844345]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   52.849092]  ip_local_deliver_finish+0x1ee/0x2e0
[   52.853842]  ip_local_deliver+0x306/0x450
[   52.857973]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   52.862881]  ? lock_downgrade+0x900/0x900
[   52.867036]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   52.871966]  ip_rcv_finish+0xb0/0x170
[   52.875756]  ip_rcv+0xcb/0x2f0
[   52.878949]  ? ip_local_deliver+0x450/0x450
[   52.883257]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   52.888606]  ? ip_local_deliver+0x450/0x450
[   52.892912]  __netif_receive_skb_one_core+0x132/0x190
[   52.898083]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   52.903344]  ? lock_acquire+0x194/0x3e0
[   52.907302]  ? process_backlog+0x182/0x6d0
[   52.911522]  __netif_receive_skb+0x1f/0x1b0
[   52.915839]  process_backlog+0x1cb/0x6d0
[   52.919885]  ? __do_softirq+0x248/0x94c
[   52.923861]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   52.928466]  net_rx_action+0x42d/0xde0
[   52.932346]  ? mark_lock+0xc5/0x1200
[   52.936172]  ? napi_busy_loop+0x6e0/0x6e0
[   52.940308]  ? rcu_is_watching+0x31/0x80
[   52.944362]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   52.949311]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   52.954590]  ? __do_softirq+0x1d9/0x94c
[   52.958551]  ? ip_finish_output2+0x709/0x22a0
[   52.963031]  ? trace_hardirqs_on+0x28/0x180
[   52.967350]  __do_softirq+0x248/0x94c
[   52.971148]  ? ip_finish_output2+0x709/0x22a0
[   52.975627]  do_softirq_own_stack+0x2a/0x40
[   52.979930]  </IRQ>
[   52.982155]  do_softirq.part.17+0x11a/0x150
[   52.986454]  __local_bh_enable_ip+0x1ee/0x230
[   52.990935]  ip_finish_output2+0x72d/0x22a0
[   52.995268]  ? ip_frag_next+0xa10/0xa10
[   52.999250]  ? rcu_read_lock_held+0x9c/0xb0
[   53.003812]  ? rcu_read_lock_held_common+0x170/0x170
[   53.008931]  __ip_finish_output+0x401/0xa50
[   53.013249]  ? __ip_finish_output+0x401/0xa50
[   53.017748]  ip_finish_output+0x27/0x170
[   53.021818]  ip_output+0x1c6/0x560
[   53.025351]  ? ip_mc_output+0xd10/0xd10
[   53.029650]  ? __ip_finish_output+0xa50/0xa50
[   53.034166]  ? rcu_read_lock_held_common+0x170/0x170
[   53.039267]  ? rcu_read_lock_held+0x9c/0xb0
[   53.043579]  ip_local_out+0x7e/0x130
[   53.047282]  __ip_queue_xmit+0x6f6/0x1de0
[   53.051412]  ? __skb_checksum+0x7c0/0x7c0
[   53.055559]  ? skb_send_sock_locked+0x750/0x750
[   53.060218]  ? reqsk_fastopen_remove+0x560/0x560
[   53.064962]  ? dccp_insert_options+0x1e2/0xb20
[   53.069564]  ip_queue_xmit+0x45/0x70
[   53.073276]  dccp_transmit_skb+0xb76/0x12a0
[   53.077602]  dccp_xmit_packet+0x1a0/0x580
[   53.081755]  dccp_write_xmit+0x128/0x180
[   53.085801]  dccp_sendmsg+0x68f/0xdb0
[   53.089595]  ? aa_sk_perm+0x182/0x740
[   53.093386]  ? dccp_disconnect+0xa90/0xa90
[   53.097606]  ? aa_af_perm+0x240/0x240
[   53.101424]  inet_sendmsg+0xbd/0xe0
[   53.105050]  ? inet_send_prepare+0x3a0/0x3a0
[   53.109440]  sock_sendmsg+0xdf/0x110
[   53.113162]  ____sys_sendmsg+0x687/0xae0
[   53.117217]  ? copy_msghdr_from_user+0x20d/0x3f0
[   53.121968]  ? kernel_sendmsg+0x30/0x30
[   53.125943]  ? __fget+0x2ae/0x440
[   53.129394]  ___sys_sendmsg+0xe4/0x160
[   53.133271]  ? sendmsg_copy_msghdr+0x30/0x30
[   53.137675]  ? rcu_read_lock_held+0x9c/0xb0
[   53.141984]  ? rcu_read_lock_held_common+0x170/0x170
[   53.147078]  ? __fget+0x2c8/0x440
[   53.150550]  ? __x64_sys_dup2+0x2e0/0x2e0
[   53.154707]  ? lock_downgrade+0x900/0x900
[   53.158853]  ? __fget_light+0x17f/0x1f0
[   53.162818]  ? __fdget+0xe/0x10
[   53.166369]  __sys_sendmsg+0xd9/0x180
[   53.170155]  ? __sys_sendmsg_sock+0xa0/0xa0
[   53.174487]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   53.179773]  ? __sched_text_start+0x8/0x8
[   53.184005]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   53.189362]  __x64_sys_sendmsg+0x73/0xb0
[   53.193420]  do_syscall_64+0xd0/0x600
[   53.197218]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   53.202501] RIP: 0033:0x452f89
[   53.205686] 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
[   53.224586] RSP: 002b:00007f549c3cdc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   53.232296] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   53.239564] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   53.246831] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   53.254087] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   53.261357] R13: 00000000ffffffff R14: 00007f549c3ce6d4 R15: 0000000000000002
[   53.268649] CPU: 1 PID: 4843 Comm: syz-executor Not tainted 5.5.0-rc1-syzkaller #0
[   53.276377] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   53.285717] Call Trace:
[   53.288280]  <IRQ>
[   53.290416]  dump_stack+0x12f/0x187
[   53.294035]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   53.299207]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   53.304141]  ? dccp_parse_options+0x333/0x1000
[   53.308717]  dccp_deliver_input_to_ccids+0xcc/0x220
[   53.313717]  dccp_rcv_established+0x49/0x70
[   53.318017]  dccp_v4_do_rcv+0xf4/0x160
[   53.321890]  __sk_receive_skb+0x2b6/0x9e0
[   53.326285]  ? sk_free+0x60/0x60
[   53.329633]  ? dccp_invalid_packet+0x3ec/0x750
[   53.334201]  dccp_v4_rcv+0xc22/0x1c0b
[   53.337999]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   53.342751]  ip_local_deliver_finish+0x1ee/0x2e0
[   53.347489]  ip_local_deliver+0x306/0x450
[   53.351620]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   53.356528]  ? lock_downgrade+0x900/0x900
[   53.360660]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   53.365581]  ip_rcv_finish+0xb0/0x170
[   53.369368]  ip_rcv+0xcb/0x2f0
[   53.373325]  ? ip_local_deliver+0x450/0x450
[   53.377631]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   53.382980]  ? ip_local_deliver+0x450/0x450
[   53.387283]  __netif_receive_skb_one_core+0x132/0x190
[   53.392451]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   53.397624]  ? lock_acquire+0x194/0x3e0
[   53.401578]  ? process_backlog+0x182/0x6d0
[   53.405797]  __netif_receive_skb+0x1f/0x1b0
[   53.410100]  process_backlog+0x1cb/0x6d0
[   53.414144]  ? __do_softirq+0x248/0x94c
[   53.418100]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   53.422731]  net_rx_action+0x42d/0xde0
[   53.426605]  ? mark_lock+0xc5/0x1200
[   53.430328]  ? napi_busy_loop+0x6e0/0x6e0
[   53.434466]  ? rcu_is_watching+0x31/0x80
[   53.438529]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   53.443355]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   53.448616]  ? __do_softirq+0x1d9/0x94c
[   53.452571]  ? ip_finish_output2+0x709/0x22a0
[   53.457048]  ? trace_hardirqs_on+0x28/0x180
[   53.461363]  __do_softirq+0x248/0x94c
[   53.465158]  ? ip_finish_output2+0x709/0x22a0
[   53.469639]  do_softirq_own_stack+0x2a/0x40
[   53.473940]  </IRQ>
[   53.477113]  do_softirq.part.17+0x11a/0x150
[   53.481414]  __local_bh_enable_ip+0x1ee/0x230
[   53.485910]  ip_finish_output2+0x72d/0x22a0
[   53.490219]  ? ip_frag_next+0xa10/0xa10
[   53.494175]  ? rcu_read_lock_held+0x9c/0xb0
[   53.498486]  ? rcu_read_lock_held_common+0x170/0x170
[   53.503575]  __ip_finish_output+0x401/0xa50
[   53.507880]  ? __ip_finish_output+0x401/0xa50
[   53.512360]  ip_finish_output+0x27/0x170
[   53.516402]  ip_output+0x1c6/0x560
[   53.519925]  ? ip_mc_output+0xd10/0xd10
[   53.523883]  ? __ip_finish_output+0xa50/0xa50
[   53.528356]  ? rcu_read_lock_held_common+0x170/0x170
[   53.533449]  ? rcu_read_lock_held+0x9c/0xb0
[   53.537753]  ip_local_out+0x7e/0x130
[   53.541447]  __ip_queue_xmit+0x6f6/0x1de0
[   53.545571]  ? __skb_checksum+0x7c0/0x7c0
[   53.550846]  ? skb_send_sock_locked+0x750/0x750
[   53.555499]  ? reqsk_fastopen_remove+0x560/0x560
[   53.560239]  ? dccp_insert_options+0x1e2/0xb20
[   53.564813]  ip_queue_xmit+0x45/0x70
[   53.568511]  dccp_transmit_skb+0xb76/0x12a0
[   53.572820]  dccp_xmit_packet+0x1a0/0x580
[   53.577842]  dccp_write_xmit+0x128/0x180
[   53.581903]  dccp_sendmsg+0x68f/0xdb0
[   53.585712]  ? aa_sk_perm+0x182/0x740
[   53.589508]  ? dccp_disconnect+0xa90/0xa90
[   53.593849]  ? aa_af_perm+0x240/0x240
[   53.597654]  inet_sendmsg+0xbd/0xe0
[   53.601263]  ? inet_send_prepare+0x3a0/0x3a0
[   53.605672]  sock_sendmsg+0xdf/0x110
[   53.609461]  ____sys_sendmsg+0x687/0xae0
[   53.613503]  ? copy_msghdr_from_user+0x20d/0x3f0
[   53.618249]  ? kernel_sendmsg+0x30/0x30
[   53.622208]  ? __fget+0x2ae/0x440
[   53.625650]  ___sys_sendmsg+0xe4/0x160
[   53.629518]  ? sendmsg_copy_msghdr+0x30/0x30
[   53.634052]  ? rcu_read_lock_held+0x9c/0xb0
[   53.638373]  ? rcu_read_lock_held_common+0x170/0x170
[   53.643463]  ? __fget+0x2c8/0x440
[   53.646902]  ? __x64_sys_dup2+0x2e0/0x2e0
[   53.651045]  ? lock_downgrade+0x900/0x900
[   53.655182]  ? __fget_light+0x17f/0x1f0
[   53.659137]  ? __fdget+0xe/0x10
[   53.662405]  __sys_sendmsg+0xd9/0x180
[   53.666207]  ? __sys_sendmsg_sock+0xa0/0xa0
[   53.670518]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   53.675774]  ? __sched_text_start+0x8/0x8
[   53.679928]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   53.685296]  __x64_sys_sendmsg+0x73/0xb0
[   53.689550]  do_syscall_64+0xd0/0x600
[   53.693349]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   53.698521] RIP: 0033:0x452f89
[   53.701704] 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
[   53.720613] RSP: 002b:00007fcdd0c13c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   53.728306] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   53.735710] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
2019/12/11 07:31:02 executed programs: 18
[   53.742964] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   53.750321] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   53.758192] R13: 00000000ffffffff R14: 00007fcdd0c146d4 R15: 0000000000000002
[   53.816284] 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()
[   53.829617] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.5.0-rc1-syzkaller #0
[   53.837416] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   53.846776] Call Trace:
[   53.849384]  dump_stack+0x12f/0x187
[   53.853038]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   53.858353]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   53.863126]  ? dccp_parse_options+0x333/0x1000
[   53.867728]  dccp_deliver_input_to_ccids+0xcc/0x220
[   53.871767] 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()
[   53.872752]  dccp_rcv_established+0x49/0x70
[   53.872764]  dccp_v4_do_rcv+0xf4/0x160
[   53.872777]  __sk_receive_skb+0x2b6/0x9e0
[   53.872794]  ? sk_free+0x60/0x60
[   53.872803]  ? dccp_invalid_packet+0x3ec/0x750
[   53.872823]  dccp_v4_rcv+0xc22/0x1c0b
[   53.872850]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   53.914931]  ip_local_deliver_finish+0x1ee/0x2e0
[   53.919685]  ip_local_deliver+0x306/0x450
[   53.923842]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   53.928771]  ? lock_downgrade+0x900/0x900
[   53.932998]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   53.937923]  ip_rcv_finish+0xb0/0x170
[   53.941709]  ip_rcv+0xcb/0x2f0
[   53.944888]  ? ip_local_deliver+0x450/0x450
[   53.949214]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   53.954587]  ? ip_local_deliver+0x450/0x450
[   53.958908]  __netif_receive_skb_one_core+0x132/0x190
[   53.964085]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   53.969260]  ? lock_acquire+0x194/0x3e0
[   53.973214]  ? process_backlog+0x182/0x6d0
[   53.977437]  __netif_receive_skb+0x1f/0x1b0
[   53.981744]  process_backlog+0x1cb/0x6d0
[   53.985784]  ? __do_softirq+0x248/0x94c
[   53.989754]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   53.995376]  net_rx_action+0x42d/0xde0
[   53.999259]  ? napi_busy_loop+0x6e0/0x6e0
[   54.003387]  ? rcu_is_watching+0x31/0x80
[   54.007433]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   54.012378]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   54.017640]  ? __do_softirq+0x1d9/0x94c
[   54.021668]  ? trace_hardirqs_on+0x28/0x180
[   54.026003]  __do_softirq+0x248/0x94c
[   54.029800]  ? takeover_tasklets+0x7b0/0x7b0
[   54.034213]  run_ksoftirqd+0x88/0x100
[   54.037999]  smpboot_thread_fn+0x342/0x790
[   54.042218]  ? smpboot_unregister_percpu_thread+0x180/0x180
[   54.048234]  ? __kasan_check_read+0x11/0x20
[   54.052546]  ? __kthread_parkme+0xc8/0x1a0
[   54.056765]  ? __kasan_check_read+0x11/0x20
[   54.061076]  kthread+0x334/0x3f0
[   54.064434]  ? smpboot_unregister_percpu_thread+0x180/0x180
[   54.070123]  ? kthread_mod_delayed_work+0x190/0x190
[   54.075124]  ret_from_fork+0x3a/0x50
[   54.078839] CPU: 1 PID: 4874 Comm: syz-executor2 Not tainted 5.5.0-rc1-syzkaller #0
[   54.086643] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.096108] Call Trace:
[   54.098699]  <IRQ>
[   54.100981]  dump_stack+0x12f/0x187
[   54.104643]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   54.109845]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   54.114619]  ? dccp_parse_options+0x333/0x1000
[   54.119204]  dccp_deliver_input_to_ccids+0xcc/0x220
[   54.124225]  dccp_rcv_established+0x49/0x70
[   54.128560]  dccp_v4_do_rcv+0xf4/0x160
[   54.132476]  __sk_receive_skb+0x2b6/0x9e0
[   54.136658]  ? sk_free+0x60/0x60
[   54.140027]  ? dccp_invalid_packet+0x3ec/0x750
[   54.144631]  dccp_v4_rcv+0xc22/0x1c0b
[   54.148499]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   54.153279]  ip_local_deliver_finish+0x1ee/0x2e0
[   54.158043]  ip_local_deliver+0x306/0x450
[   54.162200]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   54.167235]  ? lock_downgrade+0x900/0x900
[   54.171398]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   54.176353]  ip_rcv_finish+0xb0/0x170
[   54.180158]  ip_rcv+0xcb/0x2f0
[   54.183363]  ? ip_local_deliver+0x450/0x450
[   54.187692]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   54.193068]  ? ip_local_deliver+0x450/0x450
[   54.197398]  __netif_receive_skb_one_core+0x132/0x190
[   54.202607]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   54.207894]  ? lock_acquire+0x194/0x3e0
[   54.211874]  ? process_backlog+0x182/0x6d0
[   54.216126]  __netif_receive_skb+0x1f/0x1b0
[   54.220474]  process_backlog+0x1cb/0x6d0
[   54.224534]  ? __do_softirq+0x248/0x94c
[   54.228508]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   54.233106]  net_rx_action+0x42d/0xde0
[   54.237007]  ? mark_lock+0xc5/0x1200
[   54.240738]  ? napi_busy_loop+0x6e0/0x6e0
[   54.244887]  ? rcu_is_watching+0x31/0x80
[   54.248962]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   54.253821]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   54.259113]  ? __do_softirq+0x1d9/0x94c
[   54.263112]  ? ip_finish_output2+0x709/0x22a0
[   54.267619]  ? trace_hardirqs_on+0x28/0x180
[   54.271981]  __do_softirq+0x248/0x94c
[   54.275802]  ? ip_finish_output2+0x709/0x22a0
[   54.280308]  do_softirq_own_stack+0x2a/0x40
[   54.284647]  </IRQ>
[   54.286905]  do_softirq.part.17+0x11a/0x150
[   54.291239]  __local_bh_enable_ip+0x1ee/0x230
[   54.296089]  ip_finish_output2+0x72d/0x22a0
[   54.300434]  ? ip_frag_next+0xa10/0xa10
[   54.301114] 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()
[   54.304408]  ? rcu_read_lock_held+0x9c/0xb0
[   54.304416]  ? rcu_read_lock_held_common+0x170/0x170
[   54.304435]  __ip_finish_output+0x401/0xa50
[   54.304441]  ? __ip_finish_output+0x401/0xa50
[   54.304457]  ip_finish_output+0x27/0x170
[   54.304468]  ip_output+0x1c6/0x560
[   54.304480]  ? ip_mc_output+0xd10/0xd10
[   54.304492]  ? __ip_finish_output+0xa50/0xa50
[   54.304497]  ? rcu_read_lock_held_common+0x170/0x170
[   54.304504]  ? rcu_read_lock_held+0x9c/0xb0
[   54.361224]  ip_local_out+0x7e/0x130
[   54.364924]  __ip_queue_xmit+0x6f6/0x1de0
[   54.369051]  ? __skb_checksum+0x7c0/0x7c0
[   54.373179]  ? skb_send_sock_locked+0x750/0x750
[   54.377826]  ? reqsk_fastopen_remove+0x560/0x560
[   54.382560]  ? dccp_insert_options+0x1e2/0xb20
[   54.387146]  ip_queue_xmit+0x45/0x70
[   54.390841]  dccp_transmit_skb+0xb76/0x12a0
[   54.395167]  dccp_xmit_packet+0x1a0/0x580
[   54.399300]  dccp_write_xmit+0x128/0x180
[   54.403959]  dccp_sendmsg+0x68f/0xdb0
[   54.407756]  ? aa_sk_perm+0x182/0x740
[   54.411551]  ? dccp_disconnect+0xa90/0xa90
[   54.415766]  ? aa_af_perm+0x240/0x240
[   54.419564]  inet_sendmsg+0xbd/0xe0
[   54.423185]  ? inet_send_prepare+0x3a0/0x3a0
[   54.427576]  sock_sendmsg+0xdf/0x110
[   54.431275]  ____sys_sendmsg+0x687/0xae0
[   54.435317]  ? copy_msghdr_from_user+0x20d/0x3f0
[   54.440055]  ? kernel_sendmsg+0x30/0x30
[   54.444038]  ? __fget+0x2ae/0x440
[   54.447495]  ___sys_sendmsg+0xe4/0x160
[   54.451375]  ? sendmsg_copy_msghdr+0x30/0x30
[   54.455761]  ? rcu_read_lock_held+0x9c/0xb0
[   54.460061]  ? rcu_read_lock_held_common+0x170/0x170
[   54.465151]  ? __fget+0x2c8/0x440
[   54.468605]  ? __x64_sys_dup2+0x2e0/0x2e0
[   54.472738]  ? lock_downgrade+0x900/0x900
[   54.476873]  ? __fget_light+0x17f/0x1f0
[   54.480936]  ? __fdget+0xe/0x10
[   54.484292]  __sys_sendmsg+0xd9/0x180
[   54.488085]  ? __sys_sendmsg_sock+0xa0/0xa0
[   54.492394]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   54.497743]  ? __sched_text_start+0x8/0x8
[   54.501904]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   54.507278]  __x64_sys_sendmsg+0x73/0xb0
[   54.511356]  do_syscall_64+0xd0/0x600
[   54.515146]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   54.520317] RIP: 0033:0x452f89
[   54.523507] 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
[   54.542491] RSP: 002b:00007f2c64d74c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   54.550189] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   54.557440] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   54.564696] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   54.571970] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   54.580085] R13: 00000000ffffffff R14: 00007f2c64d756d4 R15: 0000000000000002
[   54.587516] CPU: 0 PID: 4909 Comm: syz-executor Not tainted 5.5.0-rc1-syzkaller #0
[   54.595238] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.604607] Call Trace:
[   54.605086] 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()
[   54.607195]  <IRQ>
[   54.607207]  dump_stack+0x12f/0x187
[   54.607227]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   54.607242]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   54.607248]  ? dccp_parse_options+0x333/0x1000
[   54.607270]  dccp_deliver_input_to_ccids+0xcc/0x220
[   54.645729]  dccp_rcv_established+0x49/0x70
[   54.650118]  dccp_v4_do_rcv+0xf4/0x160
[   54.654064]  __sk_receive_skb+0x2b6/0x9e0
[   54.658595]  ? sk_free+0x60/0x60
[   54.661949]  ? dccp_invalid_packet+0x3ec/0x750
[   54.666522]  dccp_v4_rcv+0xc22/0x1c0b
[   54.670324]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   54.675121]  ip_local_deliver_finish+0x1ee/0x2e0
[   54.680001]  ip_local_deliver+0x306/0x450
[   54.684139]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   54.689147]  ? lock_downgrade+0x900/0x900
[   54.693301]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   54.698253]  ip_rcv_finish+0xb0/0x170
[   54.702056]  ip_rcv+0xcb/0x2f0
[   54.705251]  ? ip_local_deliver+0x450/0x450
[   54.709912]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   54.715418]  ? ip_local_deliver+0x450/0x450
[   54.719852]  __netif_receive_skb_one_core+0x132/0x190
[   54.725034]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   54.730215]  ? lock_acquire+0x194/0x3e0
[   54.734188]  ? process_backlog+0x182/0x6d0
[   54.738422]  __netif_receive_skb+0x1f/0x1b0
[   54.742762]  process_backlog+0x1cb/0x6d0
[   54.746821]  ? __do_softirq+0x248/0x94c
[   54.750786]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   54.755373]  net_rx_action+0x42d/0xde0
[   54.759254]  ? mark_lock+0xc5/0x1200
[   54.762964]  ? napi_busy_loop+0x6e0/0x6e0
[   54.767099]  ? rcu_is_watching+0x31/0x80
[   54.771167]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   54.775997]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   54.781256]  ? __do_softirq+0x1d9/0x94c
[   54.785224]  ? ip_finish_output2+0x709/0x22a0
[   54.789719]  ? trace_hardirqs_on+0x28/0x180
[   54.794045]  __do_softirq+0x248/0x94c
[   54.797842]  ? ip_finish_output2+0x709/0x22a0
[   54.802342]  do_softirq_own_stack+0x2a/0x40
[   54.806661]  </IRQ>
[   54.808897]  do_softirq.part.17+0x11a/0x150
[   54.813211]  __local_bh_enable_ip+0x1ee/0x230
[   54.817815]  ip_finish_output2+0x72d/0x22a0
[   54.822179]  ? ip_frag_next+0xa10/0xa10
[   54.826139]  ? rcu_read_lock_held+0x9c/0xb0
[   54.830569]  ? rcu_read_lock_held_common+0x170/0x170
[   54.835668]  __ip_finish_output+0x401/0xa50
[   54.839988]  ? __ip_finish_output+0x401/0xa50
[   54.844493]  ip_finish_output+0x27/0x170
[   54.848558]  ip_output+0x1c6/0x560
[   54.852250]  ? ip_mc_output+0xd10/0xd10
[   54.856228]  ? __ip_finish_output+0xa50/0xa50
[   54.860730]  ? rcu_read_lock_held_common+0x170/0x170
[   54.865823]  ? rcu_read_lock_held+0x9c/0xb0
[   54.870171]  ip_local_out+0x7e/0x130
[   54.873893]  __ip_queue_xmit+0x6f6/0x1de0
[   54.878037]  ? __skb_checksum+0x7c0/0x7c0
[   54.882171]  ? skb_send_sock_locked+0x750/0x750
[   54.886832]  ? reqsk_fastopen_remove+0x560/0x560
[   54.891590]  ? dccp_insert_options+0x1e2/0xb20
[   54.896166]  ip_queue_xmit+0x45/0x70
[   54.899865]  dccp_transmit_skb+0xb76/0x12a0
[   54.904178]  dccp_xmit_packet+0x1a0/0x580
[   54.908313]  dccp_write_xmit+0x128/0x180
[   54.912362]  dccp_sendmsg+0x68f/0xdb0
[   54.916147]  ? aa_sk_perm+0x182/0x740
[   54.919933]  ? dccp_disconnect+0xa90/0xa90
[   54.924149]  ? aa_af_perm+0x240/0x240
[   54.927944]  inet_sendmsg+0xbd/0xe0
[   54.931560]  ? inet_send_prepare+0x3a0/0x3a0
[   54.935949]  sock_sendmsg+0xdf/0x110
[   54.939646]  ____sys_sendmsg+0x687/0xae0
[   54.943690]  ? copy_msghdr_from_user+0x20d/0x3f0
[   54.948428]  ? kernel_sendmsg+0x30/0x30
[   54.952391]  ? __fget+0x2ae/0x440
[   54.955845]  ___sys_sendmsg+0xe4/0x160
[   54.959716]  ? sendmsg_copy_msghdr+0x30/0x30
[   54.964104]  ? rcu_read_lock_held+0x9c/0xb0
[   54.968417]  ? rcu_read_lock_held_common+0x170/0x170
[   54.973517]  ? __fget+0x2c8/0x440
[   54.976969]  ? __x64_sys_dup2+0x2e0/0x2e0
[   54.981113]  ? lock_downgrade+0x900/0x900
[   54.985258]  ? __fget_light+0x17f/0x1f0
[   54.989230]  ? __fdget+0xe/0x10
[   54.992505]  __sys_sendmsg+0xd9/0x180
[   54.996298]  ? __sys_sendmsg_sock+0xa0/0xa0
[   55.000625]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   55.006012]  ? __sched_text_start+0x8/0x8
[   55.010182]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   55.015556]  __x64_sys_sendmsg+0x73/0xb0
[   55.019610]  do_syscall_64+0xd0/0x600
[   55.023421]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   55.028596] RIP: 0033:0x452f89
[   55.031785] 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
[   55.050667] RSP: 002b:00007fcdd0c13c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   55.058357] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   55.065607] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   55.072859] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   55.080129] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   55.087417] R13: 00000000ffffffff R14: 00007fcdd0c146d4 R15: 0000000000000002
[   55.094822] CPU: 1 PID: 4910 Comm: syz-executor1 Not tainted 5.5.0-rc1-syzkaller #0
[   55.102624] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   55.111969] Call Trace:
[   55.114541]  <IRQ>
[   55.116678]  dump_stack+0x12f/0x187
[   55.120307]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   55.125494]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   55.130239]  ? dccp_parse_options+0x333/0x1000
[   55.134822]  dccp_deliver_input_to_ccids+0xcc/0x220
[   55.139844]  dccp_rcv_established+0x49/0x70
[   55.144168]  dccp_v4_do_rcv+0xf4/0x160
[   55.148046]  __sk_receive_skb+0x2b6/0x9e0
[   55.152202]  ? sk_free+0x60/0x60
[   55.155573]  ? dccp_invalid_packet+0x3ec/0x750
[   55.160158]  dccp_v4_rcv+0xc22/0x1c0b
[   55.163979]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   55.168747]  ip_local_deliver_finish+0x1ee/0x2e0
[   55.173494]  ip_local_deliver+0x306/0x450
[   55.177632]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   55.182546]  ? lock_downgrade+0x900/0x900
[   55.186703]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   55.191674]  ip_rcv_finish+0xb0/0x170
[   55.195674]  ip_rcv+0xcb/0x2f0
[   55.198870]  ? ip_local_deliver+0x450/0x450
[   55.203189]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   55.208544]  ? ip_local_deliver+0x450/0x450
[   55.212876]  __netif_receive_skb_one_core+0x132/0x190
[   55.218048]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   55.223234]  ? lock_acquire+0x194/0x3e0
[   55.227187]  ? process_backlog+0x182/0x6d0
[   55.233850]  __netif_receive_skb+0x1f/0x1b0
[   55.238156]  process_backlog+0x1cb/0x6d0
[   55.242220]  ? __do_softirq+0x248/0x94c
[   55.246192]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   55.250765]  net_rx_action+0x42d/0xde0
[   55.254656]  ? mark_lock+0xc5/0x1200
[   55.258376]  ? napi_busy_loop+0x6e0/0x6e0
[   55.262529]  ? rcu_is_watching+0x31/0x80
[   55.266583]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   55.271419]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   55.276681]  ? __do_softirq+0x1d9/0x94c
[   55.280769]  ? ip_finish_output2+0x709/0x22a0
[   55.285257]  ? trace_hardirqs_on+0x28/0x180
[   55.289588]  __do_softirq+0x248/0x94c
[   55.293383]  ? ip_finish_output2+0x709/0x22a0
[   55.297862]  do_softirq_own_stack+0x2a/0x40
[   55.302164]  </IRQ>
[   55.304536]  do_softirq.part.17+0x11a/0x150
[   55.308884]  __local_bh_enable_ip+0x1ee/0x230
[   55.313534]  ip_finish_output2+0x72d/0x22a0
[   55.317862]  ? ip_frag_next+0xa10/0xa10
[   55.321841]  ? rcu_read_lock_held+0x9c/0xb0
[   55.326169]  ? rcu_read_lock_held_common+0x170/0x170
[   55.331269]  __ip_finish_output+0x401/0xa50
[   55.335577]  ? __ip_finish_output+0x401/0xa50
[   55.340092]  ip_finish_output+0x27/0x170
[   55.344152]  ip_output+0x1c6/0x560
[   55.347685]  ? ip_mc_output+0xd10/0xd10
[   55.351662]  ? __ip_finish_output+0xa50/0xa50
[   55.356160]  ? rcu_read_lock_held_common+0x170/0x170
[   55.361252]  ? rcu_read_lock_held+0x9c/0xb0
[   55.365572]  ip_local_out+0x7e/0x130
[   55.369292]  __ip_queue_xmit+0x6f6/0x1de0
[   55.373617]  ? __skb_checksum+0x7c0/0x7c0
[   55.377779]  ? skb_send_sock_locked+0x750/0x750
[   55.382431]  ? reqsk_fastopen_remove+0x560/0x560
[   55.387185]  ? dccp_insert_options+0x1e2/0xb20
[   55.391792]  ip_queue_xmit+0x45/0x70
[   55.395625]  dccp_transmit_skb+0xb76/0x12a0
[   55.399953]  dccp_xmit_packet+0x1a0/0x580
[   55.404114]  dccp_write_xmit+0x128/0x180
[   55.408321]  dccp_sendmsg+0x68f/0xdb0
[   55.412117]  ? aa_sk_perm+0x182/0x740
[   55.415903]  ? dccp_disconnect+0xa90/0xa90
[   55.420137]  ? aa_af_perm+0x240/0x240
[   55.423949]  inet_sendmsg+0xbd/0xe0
[   55.427563]  ? inet_send_prepare+0x3a0/0x3a0
[   55.431956]  sock_sendmsg+0xdf/0x110
[   55.435653]  ____sys_sendmsg+0x687/0xae0
[   55.439698]  ? copy_msghdr_from_user+0x20d/0x3f0
[   55.444455]  ? kernel_sendmsg+0x30/0x30
[   55.448419]  ? __fget+0x2ae/0x440
[   55.451873]  ___sys_sendmsg+0xe4/0x160
[   55.455759]  ? sendmsg_copy_msghdr+0x30/0x30
[   55.460146]  ? rcu_read_lock_held+0x9c/0xb0
[   55.464448]  ? rcu_read_lock_held_common+0x170/0x170
[   55.469746]  ? __fget+0x2c8/0x440
[   55.473202]  ? __x64_sys_dup2+0x2e0/0x2e0
[   55.477343]  ? lock_downgrade+0x900/0x900
[   55.481481]  ? __fget_light+0x17f/0x1f0
[   55.485539]  ? __fdget+0xe/0x10
[   55.488808]  __sys_sendmsg+0xd9/0x180
[   55.492590]  ? __sys_sendmsg_sock+0xa0/0xa0
[   55.496911]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   55.502165]  ? __sched_text_start+0x8/0x8
[   55.506305]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   55.511660]  __x64_sys_sendmsg+0x73/0xb0
[   55.515708]  do_syscall_64+0xd0/0x600
[   55.519511]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   55.524682] RIP: 0033:0x452f89
[   55.527859] 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
[   55.546753] RSP: 002b:00007f549c3cdc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   55.554448] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   55.561701] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   55.568949] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   55.576232] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   55.583498] R13: 00000000ffffffff R14: 00007f549c3ce6d4 R15: 0000000000000002
[   55.656809] 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()
[   55.668719] 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()
[   55.670242] CPU: 0 PID: 4925 Comm: syz-executor4 Not tainted 5.5.0-rc1-syzkaller #0
[   55.691207] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   55.700559] Call Trace:
[   55.703141]  <IRQ>
[   55.705283]  dump_stack+0x12f/0x187
[   55.708905]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   55.714093]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   55.718944]  ? dccp_parse_options+0x333/0x1000
[   55.723647]  dccp_deliver_input_to_ccids+0xcc/0x220
[   55.728782]  dccp_rcv_established+0x49/0x70
[   55.733148]  dccp_v4_do_rcv+0xf4/0x160
[   55.737027]  __sk_receive_skb+0x2b6/0x9e0
[   55.741168]  ? sk_free+0x60/0x60
[   55.744540]  ? dccp_invalid_packet+0x3ec/0x750
[   55.749138]  dccp_v4_rcv+0xc22/0x1c0b
[   55.752948]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   55.757720]  ip_local_deliver_finish+0x1ee/0x2e0
[   55.762472]  ip_local_deliver+0x306/0x450
[   55.766605]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   55.771518]  ? lock_downgrade+0x900/0x900
[   55.775652]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   55.780616]  ip_rcv_finish+0xb0/0x170
[   55.784417]  ip_rcv+0xcb/0x2f0
[   55.787616]  ? ip_local_deliver+0x450/0x450
[   55.791925]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   55.797275]  ? ip_local_deliver+0x450/0x450
[   55.801596]  __netif_receive_skb_one_core+0x132/0x190
[   55.806793]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   55.811968]  ? lock_acquire+0x194/0x3e0
[   55.815956]  ? process_backlog+0x182/0x6d0
[   55.820176]  __netif_receive_skb+0x1f/0x1b0
[   55.824481]  process_backlog+0x1cb/0x6d0
[   55.828529]  ? __do_softirq+0x248/0x94c
[   55.832487]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   55.837056]  net_rx_action+0x42d/0xde0
[   55.840928]  ? mark_lock+0xc5/0x1200
[   55.844633]  ? napi_busy_loop+0x6e0/0x6e0
[   55.848787]  ? rcu_is_watching+0x31/0x80
[   55.852845]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   55.857675]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   55.862939]  ? __do_softirq+0x1d9/0x94c
[   55.866899]  ? ip_finish_output2+0x709/0x22a0
[   55.871380]  ? trace_hardirqs_on+0x28/0x180
[   55.875702]  __do_softirq+0x248/0x94c
[   55.879505]  ? ip_finish_output2+0x709/0x22a0
[   55.885642]  do_softirq_own_stack+0x2a/0x40
[   55.889943]  </IRQ>
[   55.892163]  do_softirq.part.17+0x11a/0x150
[   55.896469]  __local_bh_enable_ip+0x1ee/0x230
[   55.900957]  ip_finish_output2+0x72d/0x22a0
[   55.905734]  ? ip_frag_next+0xa10/0xa10
[   55.910784]  ? rcu_read_lock_held+0x9c/0xb0
[   55.915104]  ? rcu_read_lock_held_common+0x170/0x170
[   55.920204]  __ip_finish_output+0x401/0xa50
[   55.925390]  ? __ip_finish_output+0x401/0xa50
[   55.929891]  ip_finish_output+0x27/0x170
[   55.933955]  ip_output+0x1c6/0x560
[   55.938261]  ? ip_mc_output+0xd10/0xd10
[   55.942221]  ? __ip_finish_output+0xa50/0xa50
[   55.946698]  ? rcu_read_lock_held_common+0x170/0x170
[   55.951785]  ? rcu_read_lock_held+0x9c/0xb0
[   55.957596]  ip_local_out+0x7e/0x130
[   55.961448]  __ip_queue_xmit+0x6f6/0x1de0
[   55.965697]  ? __skb_checksum+0x7c0/0x7c0
[   55.970703]  ? skb_send_sock_locked+0x750/0x750
[   55.975354]  ? reqsk_fastopen_remove+0x560/0x560
[   55.980177]  ? dccp_insert_options+0x1e2/0xb20
[   55.984834]  ip_queue_xmit+0x45/0x70
[   55.988619]  dccp_transmit_skb+0xb76/0x12a0
[   55.993194]  dccp_xmit_packet+0x1a0/0x580
[   55.997336]  dccp_write_xmit+0x128/0x180
[   56.001486]  dccp_sendmsg+0x68f/0xdb0
[   56.005377]  ? aa_sk_perm+0x182/0x740
[   56.009166]  ? dccp_disconnect+0xa90/0xa90
[   56.013560]  ? aa_af_perm+0x240/0x240
[   56.017362]  inet_sendmsg+0xbd/0xe0
[   56.021136]  ? inet_send_prepare+0x3a0/0x3a0
[   56.025544]  sock_sendmsg+0xdf/0x110
[   56.029244]  ____sys_sendmsg+0x687/0xae0
[   56.033385]  ? copy_msghdr_from_user+0x20d/0x3f0
[   56.038128]  ? kernel_sendmsg+0x30/0x30
[   56.042089]  ? __fget+0x2ae/0x440
[   56.045538]  ___sys_sendmsg+0xe4/0x160
[   56.049503]  ? sendmsg_copy_msghdr+0x30/0x30
[   56.053915]  ? rcu_read_lock_held+0x9c/0xb0
[   56.058305]  ? rcu_read_lock_held_common+0x170/0x170
[   56.063404]  ? __fget+0x2c8/0x440
[   56.066856]  ? __x64_sys_dup2+0x2e0/0x2e0
[   56.070982]  ? lock_downgrade+0x900/0x900
[   56.075118]  ? __fget_light+0x17f/0x1f0
[   56.079083]  ? __fdget+0xe/0x10
[   56.082775]  __sys_sendmsg+0xd9/0x180
[   56.086675]  ? __sys_sendmsg_sock+0xa0/0xa0
[   56.091007]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   56.096268]  ? __sched_text_start+0x8/0x8
[   56.100433]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   56.105797]  __x64_sys_sendmsg+0x73/0xb0
[   56.109841]  do_syscall_64+0xd0/0x600
[   56.113624]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   56.119060] RIP: 0033:0x452f89
[   56.122259] 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
[   56.141229] RSP: 002b:00007ff96910dc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   56.148932] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   56.156197] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   56.163487] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   56.174356] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   56.183092] R13: 00000000ffffffff R14: 00007ff96910e6d4 R15: 0000000000000002
[   56.190382] CPU: 1 PID: 4931 Comm: syz-executor3 Not tainted 5.5.0-rc1-syzkaller #0
[   56.198181] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   56.198530] net_ratelimit: 29 callbacks suppressed
[   56.198533] dccp_close: ABORT with 24 bytes unread
[   56.207544] Call Trace:
[   56.207550]  <IRQ>
[   56.207564]  dump_stack+0x12f/0x187
[   56.207581]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   56.207592]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   56.207598]  ? dccp_parse_options+0x333/0x1000
[   56.207617]  dccp_deliver_input_to_ccids+0xcc/0x220
[   56.207628]  dccp_rcv_established+0x49/0x70
[   56.207635]  dccp_v4_do_rcv+0xf4/0x160
[   56.207646]  __sk_receive_skb+0x2b6/0x9e0
[   56.207660]  ? sk_free+0x60/0x60
[   56.217769] dccp_close: ABORT with 24 bytes unread
[   56.220112]  ? dccp_invalid_packet+0x3ec/0x750
[   56.220131]  dccp_v4_rcv+0xc22/0x1c0b
[   56.228367] dccp_close: ABORT with 24 bytes unread
[   56.231113]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   56.231129]  ip_local_deliver_finish+0x1ee/0x2e0
[   56.241671] dccp_close: ABORT with 24 bytes unread
[   56.246320]  ip_local_deliver+0x306/0x450
[   56.246330]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   56.246337]  ? lock_downgrade+0x900/0x900
[   56.246347]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   56.315631]  ip_rcv_finish+0xb0/0x170
[   56.319802]  ip_rcv+0xcb/0x2f0
[   56.323000]  ? ip_local_deliver+0x450/0x450
[   56.327359]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   56.332734]  ? ip_local_deliver+0x450/0x450
[   56.337064]  __netif_receive_skb_one_core+0x132/0x190
[   56.337309] 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()
[   56.342244]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   56.342258]  ? lock_acquire+0x194/0x3e0
[   56.342264]  ? process_backlog+0x182/0x6d0
[   56.342278]  __netif_receive_skb+0x1f/0x1b0
[   56.342290]  process_backlog+0x1cb/0x6d0
[   56.342299]  ? __do_softirq+0x248/0x94c
[   56.342305]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   56.342324]  net_rx_action+0x42d/0xde0
[   56.342335]  ? mark_lock+0xc5/0x1200
[   56.393589]  ? napi_busy_loop+0x6e0/0x6e0
[   56.397745]  ? rcu_is_watching+0x31/0x80
[   56.401815]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   56.406642]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   56.411903]  ? __do_softirq+0x1d9/0x94c
[   56.415859]  ? ip_finish_output2+0x709/0x22a0
[   56.420346]  ? trace_hardirqs_on+0x28/0x180
[   56.424653]  __do_softirq+0x248/0x94c
[   56.428442]  ? ip_finish_output2+0x709/0x22a0
[   56.432916]  do_softirq_own_stack+0x2a/0x40
[   56.437217]  </IRQ>
[   56.439449]  do_softirq.part.17+0x11a/0x150
[   56.443754]  __local_bh_enable_ip+0x1ee/0x230
[   56.448235]  ip_finish_output2+0x72d/0x22a0
[   56.452547]  ? ip_frag_next+0xa10/0xa10
[   56.456500]  ? rcu_read_lock_held+0x9c/0xb0
[   56.460802]  ? rcu_read_lock_held_common+0x170/0x170
[   56.465894]  __ip_finish_output+0x401/0xa50
[   56.470195]  ? __ip_finish_output+0x401/0xa50
[   56.474676]  ip_finish_output+0x27/0x170
[   56.478722]  ip_output+0x1c6/0x560
[   56.482244]  ? ip_mc_output+0xd10/0xd10
[   56.486208]  ? __ip_finish_output+0xa50/0xa50
[   56.490687]  ? rcu_read_lock_held_common+0x170/0x170
[   56.495773]  ? rcu_read_lock_held+0x9c/0xb0
[   56.500079]  ip_local_out+0x7e/0x130
[   56.503789]  __ip_queue_xmit+0x6f6/0x1de0
[   56.507928]  ? __skb_checksum+0x7c0/0x7c0
[   56.512054]  ? skb_send_sock_locked+0x750/0x750
[   56.516711]  ? reqsk_fastopen_remove+0x560/0x560
[   56.521447]  ? dccp_insert_options+0x1e2/0xb20
[   56.526040]  ip_queue_xmit+0x45/0x70
[   56.529775]  dccp_transmit_skb+0xb76/0x12a0
[   56.534099]  dccp_xmit_packet+0x1a0/0x580
[   56.538234]  dccp_write_xmit+0x128/0x180
[   56.542282]  dccp_sendmsg+0x68f/0xdb0
[   56.546069]  ? aa_sk_perm+0x182/0x740
[   56.549854]  ? dccp_disconnect+0xa90/0xa90
[   56.554072]  ? aa_af_perm+0x240/0x240
[   56.557871]  inet_sendmsg+0xbd/0xe0
[   56.561503]  ? inet_send_prepare+0x3a0/0x3a0
[   56.565896]  sock_sendmsg+0xdf/0x110
[   56.569594]  ____sys_sendmsg+0x687/0xae0
[   56.573634]  ? copy_msghdr_from_user+0x20d/0x3f0
[   56.578394]  ? kernel_sendmsg+0x30/0x30
[   56.582374]  ? __fget+0x2ae/0x440
[   56.585833]  ___sys_sendmsg+0xe4/0x160
[   56.589711]  ? sendmsg_copy_msghdr+0x30/0x30
[   56.594108]  ? rcu_read_lock_held+0x9c/0xb0
[   56.598416]  ? rcu_read_lock_held_common+0x170/0x170
[   56.603525]  ? __fget+0x2c8/0x440
[   56.606997]  ? __x64_sys_dup2+0x2e0/0x2e0
[   56.611133]  ? lock_downgrade+0x900/0x900
[   56.615286]  ? __fget_light+0x17f/0x1f0
[   56.619245]  ? __fdget+0xe/0x10
[   56.622510]  __sys_sendmsg+0xd9/0x180
[   56.626294]  ? __sys_sendmsg_sock+0xa0/0xa0
[   56.630603]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   56.635857]  ? __sched_text_start+0x8/0x8
[   56.640001]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   56.645352]  __x64_sys_sendmsg+0x73/0xb0
[   56.649399]  do_syscall_64+0xd0/0x600
[   56.653184]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   56.658366] RIP: 0033:0x452f89
[   56.661558] 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
[   56.680452] RSP: 002b:00007fa686c7bc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   56.688138] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   56.695387] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   56.702967] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   56.710233] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   56.717494] R13: 00000000ffffffff R14: 00007fa686c7c6d4 R15: 0000000000000002
[   56.724795] CPU: 0 PID: 4949 Comm: syz-executor4 Not tainted 5.5.0-rc1-syzkaller #0
[   56.732433] 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()
[   56.732682] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   56.732686] Call Trace:
[   56.732690]  <IRQ>
[   56.732702]  dump_stack+0x12f/0x187
[   56.732720]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   56.770249]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   56.775137]  ? dccp_parse_options+0x333/0x1000
[   56.779724]  dccp_deliver_input_to_ccids+0xcc/0x220
[   56.787420]  dccp_rcv_established+0x49/0x70
[   56.791899]  dccp_v4_do_rcv+0xf4/0x160
[   56.795801]  __sk_receive_skb+0x2b6/0x9e0
[   56.800023]  ? sk_free+0x60/0x60
[   56.803641]  ? dccp_invalid_packet+0x3ec/0x750
[   56.808315]  dccp_v4_rcv+0xc22/0x1c0b
[   56.812204]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   56.818269]  ip_local_deliver_finish+0x1ee/0x2e0
[   56.823018]  ip_local_deliver+0x306/0x450
[   56.827158]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   56.832086]  ? lock_downgrade+0x900/0x900
[   56.836604]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   56.842660]  ip_rcv_finish+0xb0/0x170
[   56.846604]  ip_rcv+0xcb/0x2f0
[   56.849796]  ? ip_local_deliver+0x450/0x450
[   56.854186]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   56.859633]  ? ip_local_deliver+0x450/0x450
[   56.863950]  __netif_receive_skb_one_core+0x132/0x190
[   56.869393]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   56.874587]  ? lock_acquire+0x194/0x3e0
[   56.878543]  ? process_backlog+0x182/0x6d0
[   56.882906]  __netif_receive_skb+0x1f/0x1b0
[   56.887235]  process_backlog+0x1cb/0x6d0
[   56.891284]  ? __do_softirq+0x248/0x94c
[   56.895252]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   56.899838]  net_rx_action+0x42d/0xde0
[   56.904586]  ? mark_lock+0xc5/0x1200
[   56.908288]  ? napi_busy_loop+0x6e0/0x6e0
[   56.912513]  ? rcu_is_watching+0x31/0x80
[   56.916559]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   56.921391]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   56.927207]  ? __do_softirq+0x1d9/0x94c
[   56.931181]  ? ip_finish_output2+0x709/0x22a0
[   56.935674]  ? trace_hardirqs_on+0x28/0x180
[   56.940978]  __do_softirq+0x248/0x94c
[   56.944782]  ? ip_finish_output2+0x709/0x22a0
[   56.949266]  do_softirq_own_stack+0x2a/0x40
[   56.953567]  </IRQ>
[   56.955794]  do_softirq.part.17+0x11a/0x150
[   56.960095]  __local_bh_enable_ip+0x1ee/0x230
[   56.964582]  ip_finish_output2+0x72d/0x22a0
[   56.968890]  ? ip_frag_next+0xa10/0xa10
[   56.972856]  ? rcu_read_lock_held+0x9c/0xb0
[   56.977243]  ? rcu_read_lock_held_common+0x170/0x170
[   56.982328]  __ip_finish_output+0x401/0xa50
[   56.986630]  ? __ip_finish_output+0x401/0xa50
[   56.991119]  ip_finish_output+0x27/0x170
[   56.995396]  ip_output+0x1c6/0x560
[   56.999663]  ? ip_mc_output+0xd10/0xd10
[   57.004322]  ? __ip_finish_output+0xa50/0xa50
[   57.008828]  ? rcu_read_lock_held_common+0x170/0x170
[   57.014161]  ? rcu_read_lock_held+0x9c/0xb0
[   57.018478]  ip_local_out+0x7e/0x130
[   57.022387]  __ip_queue_xmit+0x6f6/0x1de0
[   57.026520]  ? __skb_checksum+0x7c0/0x7c0
[   57.030654]  ? skb_send_sock_locked+0x750/0x750
[   57.035314]  ? reqsk_fastopen_remove+0x560/0x560
[   57.040053]  ? dccp_insert_options+0x1e2/0xb20
[   57.044634]  ip_queue_xmit+0x45/0x70
[   57.048358]  dccp_transmit_skb+0xb76/0x12a0
[   57.052670]  dccp_xmit_packet+0x1a0/0x580
[   57.056806]  dccp_write_xmit+0x128/0x180
[   57.060865]  dccp_sendmsg+0x68f/0xdb0
[   57.064660]  ? aa_sk_perm+0x182/0x740
[   57.068461]  ? dccp_disconnect+0xa90/0xa90
[   57.072690]  ? aa_af_perm+0x240/0x240
[   57.077715]  inet_sendmsg+0xbd/0xe0
[   57.081350]  ? inet_send_prepare+0x3a0/0x3a0
[   57.085828]  sock_sendmsg+0xdf/0x110
[   57.089619]  ____sys_sendmsg+0x687/0xae0
[   57.093751]  ? copy_msghdr_from_user+0x20d/0x3f0
[   57.098488]  ? kernel_sendmsg+0x30/0x30
[   57.102460]  ? __fget+0x2ae/0x440
[   57.105902]  ___sys_sendmsg+0xe4/0x160
[   57.110724]  ? sendmsg_copy_msghdr+0x30/0x30
[   57.115124]  ? rcu_read_lock_held+0x9c/0xb0
[   57.119449]  ? rcu_read_lock_held_common+0x170/0x170
[   57.124567]  ? __fget+0x2c8/0x440
[   57.128011]  ? __x64_sys_dup2+0x2e0/0x2e0
[   57.132270]  ? lock_downgrade+0x900/0x900
[   57.136425]  ? __fget_light+0x17f/0x1f0
[   57.140387]  ? __fdget+0xe/0x10
[   57.143668]  __sys_sendmsg+0xd9/0x180
[   57.147455]  ? __sys_sendmsg_sock+0xa0/0xa0
[   57.151779]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   57.157037]  ? __sched_text_start+0x8/0x8
[   57.161290]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   57.166931]  __x64_sys_sendmsg+0x73/0xb0
[   57.170985]  do_syscall_64+0xd0/0x600
[   57.174783]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   57.179952] RIP: 0033:0x452f89
[   57.183136] 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
[   57.202201] RSP: 002b:00007ff96910dc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   57.209897] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   57.217471] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   57.224750] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   57.232352] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   57.240135] R13: 00000000ffffffff R14: 00007ff96910e6d4 R15: 0000000000000002
[   57.247514] CPU: 1 PID: 4950 Comm: syz-executor Not tainted 5.5.0-rc1-syzkaller #0
[   57.255226] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   57.264602] Call Trace:
[   57.267165]  <IRQ>
[   57.269300]  dump_stack+0x12f/0x187
[   57.272923]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   57.278096]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   57.282830]  ? dccp_parse_options+0x333/0x1000
[   57.287399]  dccp_deliver_input_to_ccids+0xcc/0x220
[   57.292410]  dccp_rcv_established+0x49/0x70
[   57.297605]  dccp_v4_do_rcv+0xf4/0x160
[   57.301604]  __sk_receive_skb+0x2b6/0x9e0
[   57.306366]  ? sk_free+0x60/0x60
[   57.309815]  ? dccp_invalid_packet+0x3ec/0x750
[   57.314486]  dccp_v4_rcv+0xc22/0x1c0b
[   57.318488]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   57.323233]  ip_local_deliver_finish+0x1ee/0x2e0
[   57.328082]  ip_local_deliver+0x306/0x450
[   57.332830]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   57.337759]  ? lock_downgrade+0x900/0x900
[   57.341894]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   57.347338]  ip_rcv_finish+0xb0/0x170
[   57.351127]  ip_rcv+0xcb/0x2f0
[   57.354303]  ? ip_local_deliver+0x450/0x450
[   57.358607]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   57.363972]  ? ip_local_deliver+0x450/0x450
[   57.368282]  __netif_receive_skb_one_core+0x132/0x190
[   57.373631]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   57.378908]  ? lock_acquire+0x194/0x3e0
[   57.382861]  ? process_backlog+0x182/0x6d0
[   57.387189]  __netif_receive_skb+0x1f/0x1b0
[   57.391498]  process_backlog+0x1cb/0x6d0
[   57.395628]  ? __do_softirq+0x248/0x94c
[   57.399599]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   57.404175]  net_rx_action+0x42d/0xde0
[   57.408042]  ? mark_lock+0xc5/0x1200
[   57.411832]  ? napi_busy_loop+0x6e0/0x6e0
[   57.415955]  ? rcu_is_watching+0x31/0x80
[   57.420346]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   57.425167]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   57.430422]  ? __do_softirq+0x1d9/0x94c
[   57.435154]  ? ip_finish_output2+0x709/0x22a0
[   57.440064]  ? trace_hardirqs_on+0x28/0x180
[   57.444369]  __do_softirq+0x248/0x94c
[   57.448156]  ? ip_finish_output2+0x709/0x22a0
[   57.452993]  do_softirq_own_stack+0x2a/0x40
[   57.457297]  </IRQ>
[   57.459535]  do_softirq.part.17+0x11a/0x150
[   57.463843]  __local_bh_enable_ip+0x1ee/0x230
[   57.468328]  ip_finish_output2+0x72d/0x22a0
[   57.472644]  ? ip_frag_next+0xa10/0xa10
[   57.476601]  ? rcu_read_lock_held+0x9c/0xb0
[   57.480918]  ? rcu_read_lock_held_common+0x170/0x170
[   57.486051]  __ip_finish_output+0x401/0xa50
[   57.493233]  ? __ip_finish_output+0x401/0xa50
[   57.497714]  ip_finish_output+0x27/0x170
[   57.501757]  ip_output+0x1c6/0x560
[   57.505289]  ? ip_mc_output+0xd10/0xd10
[   57.509247]  ? __ip_finish_output+0xa50/0xa50
[   57.513718]  ? rcu_read_lock_held_common+0x170/0x170
[   57.518799]  ? rcu_read_lock_held+0x9c/0xb0
[   57.523112]  ip_local_out+0x7e/0x130
[   57.526809]  __ip_queue_xmit+0x6f6/0x1de0
[   57.530934]  ? __skb_checksum+0x7c0/0x7c0
[   57.535492]  ? skb_send_sock_locked+0x750/0x750
[   57.540309]  ? reqsk_fastopen_remove+0x560/0x560
[   57.545041]  ? dccp_insert_options+0x1e2/0xb20
[   57.549619]  ip_queue_xmit+0x45/0x70
[   57.553325]  dccp_transmit_skb+0xb76/0x12a0
[   57.557640]  dccp_xmit_packet+0x1a0/0x580
[   57.561777]  dccp_write_xmit+0x128/0x180
[   57.565854]  dccp_sendmsg+0x68f/0xdb0
[   57.569733]  ? aa_sk_perm+0x182/0x740
[   57.573528]  ? dccp_disconnect+0xa90/0xa90
[   57.578872]  ? aa_af_perm+0x240/0x240
[   57.582688]  inet_sendmsg+0xbd/0xe0
[   57.586402]  ? inet_send_prepare+0x3a0/0x3a0
[   57.590792]  sock_sendmsg+0xdf/0x110
[   57.594486]  ____sys_sendmsg+0x687/0xae0
[   57.598534]  ? copy_msghdr_from_user+0x20d/0x3f0
[   57.604227]  ? kernel_sendmsg+0x30/0x30
[   57.608188]  ? __fget+0x2ae/0x440
[   57.611645]  ___sys_sendmsg+0xe4/0x160
[   57.615515]  ? sendmsg_copy_msghdr+0x30/0x30
[   57.619901]  ? rcu_read_lock_held+0x9c/0xb0
[   57.624221]  ? rcu_read_lock_held_common+0x170/0x170
[   57.629330]  ? __fget+0x2c8/0x440
[   57.632861]  ? __x64_sys_dup2+0x2e0/0x2e0
[   57.636993]  ? lock_downgrade+0x900/0x900
[   57.641130]  ? __fget_light+0x17f/0x1f0
[   57.645100]  ? __fdget+0xe/0x10
[   57.648366]  __sys_sendmsg+0xd9/0x180
[   57.652147]  ? __sys_sendmsg_sock+0xa0/0xa0
[   57.656455]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   57.661710]  ? __sched_text_start+0x8/0x8
[   57.665855]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   57.671204]  __x64_sys_sendmsg+0x73/0xb0
[   57.675345]  do_syscall_64+0xd0/0x600
[   57.679130]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   57.684294] RIP: 0033:0x452f89
[   57.687468] 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
[   57.706459] RSP: 002b:00007fcdd0c13c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   57.714335] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   57.721584] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   57.728868] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   57.737205] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   57.744463] R13: 00000000ffffffff R14: 00007fcdd0c146d4 R15: 0000000000000002
[   57.756285] dccp_close: ABORT with 24 bytes unread
[   57.758580] dccp_close: ABORT with 24 bytes unread
[   57.765030] dccp_close: ABORT with 24 bytes unread
[   57.773491] dccp_close: ABORT with 24 bytes unread
[   57.779530] dccp_close: ABORT with 578 bytes unread
[   57.784951] dccp_close: ABORT with 578 bytes unread
[   57.820188] 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()
[   57.833602] CPU: 1 PID: 4969 Comm: syz-executor Not tainted 5.5.0-rc1-syzkaller #0
[   57.841315] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   57.850786] Call Trace:
[   57.853547]  <IRQ>
[   57.855709]  dump_stack+0x12f/0x187
[   57.859400]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   57.864611]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   57.869454]  ? dccp_parse_options+0x333/0x1000
[   57.874067]  dccp_deliver_input_to_ccids+0xcc/0x220
[   57.879094]  dccp_rcv_established+0x49/0x70
[   57.884029]  dccp_v4_do_rcv+0xf4/0x160
[   57.887939]  __sk_receive_skb+0x2b6/0x9e0
[   57.892104]  ? sk_free+0x60/0x60
[   57.895489]  ? dccp_invalid_packet+0x3ec/0x750
[   57.900098]  dccp_v4_rcv+0xc22/0x1c0b
[   57.903934]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   57.908715]  ip_local_deliver_finish+0x1ee/0x2e0
[   57.913603]  ip_local_deliver+0x306/0x450
[   57.917844]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   57.922801]  ? lock_downgrade+0x900/0x900
[   57.927140]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   57.932162]  ip_rcv_finish+0xb0/0x170
[   57.935983]  ip_rcv+0xcb/0x2f0
[   57.939445]  ? ip_local_deliver+0x450/0x450
[   57.943798]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   57.949262]  ? ip_local_deliver+0x450/0x450
[   57.953683]  __netif_receive_skb_one_core+0x132/0x190
[   57.958896]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   57.964180]  ? lock_acquire+0x194/0x3e0
[   57.968167]  ? process_backlog+0x182/0x6d0
[   57.970763] 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()
[   57.972497]  __netif_receive_skb+0x1f/0x1b0
[   57.972510]  process_backlog+0x1cb/0x6d0
[   57.972520]  ? __do_softirq+0x248/0x94c
[   57.972530]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   57.972549]  net_rx_action+0x42d/0xde0
[   58.007860]  ? mark_lock+0xc5/0x1200
[   58.011574]  ? napi_busy_loop+0x6e0/0x6e0
[   58.015797]  ? rcu_is_watching+0x31/0x80
[   58.019858]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   58.024684]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   58.030554]  ? __do_softirq+0x1d9/0x94c
[   58.034511]  ? ip_finish_output2+0x709/0x22a0
[   58.038991]  ? trace_hardirqs_on+0x28/0x180
[   58.044955]  __do_softirq+0x248/0x94c
[   58.048780]  ? ip_finish_output2+0x709/0x22a0
[   58.053274]  do_softirq_own_stack+0x2a/0x40
[   58.057578]  </IRQ>
[   58.059805]  do_softirq.part.17+0x11a/0x150
[   58.064116]  __local_bh_enable_ip+0x1ee/0x230
[   58.068597]  ip_finish_output2+0x72d/0x22a0
[   58.072907]  ? ip_frag_next+0xa10/0xa10
[   58.076875]  ? rcu_read_lock_held+0x9c/0xb0
[   58.081286]  ? rcu_read_lock_held_common+0x170/0x170
[   58.086373]  __ip_finish_output+0x401/0xa50
[   58.090676]  ? __ip_finish_output+0x401/0xa50
[   58.095161]  ip_finish_output+0x27/0x170
[   58.099230]  ip_output+0x1c6/0x560
[   58.103346]  ? ip_mc_output+0xd10/0xd10
[   58.108077]  ? __ip_finish_output+0xa50/0xa50
[   58.112796]  ? rcu_read_lock_held_common+0x170/0x170
[   58.117968]  ? rcu_read_lock_held+0x9c/0xb0
[   58.122282]  ip_local_out+0x7e/0x130
[   58.125982]  __ip_queue_xmit+0x6f6/0x1de0
[   58.130117]  ? __skb_checksum+0x7c0/0x7c0
[   58.134245]  ? skb_send_sock_locked+0x750/0x750
[   58.138898]  ? reqsk_fastopen_remove+0x560/0x560
[   58.143633]  ? dccp_insert_options+0x1e2/0xb20
[   58.148210]  ip_queue_xmit+0x45/0x70
[   58.151904]  dccp_transmit_skb+0xb76/0x12a0
[   58.156225]  dccp_xmit_packet+0x1a0/0x580
[   58.160358]  dccp_write_xmit+0x128/0x180
[   58.164498]  dccp_sendmsg+0x68f/0xdb0
[   58.168281]  ? aa_sk_perm+0x182/0x740
[   58.172063]  ? dccp_disconnect+0xa90/0xa90
[   58.176373]  ? aa_af_perm+0x240/0x240
[   58.180257]  inet_sendmsg+0xbd/0xe0
[   58.184301]  ? inet_send_prepare+0x3a0/0x3a0
[   58.188693]  sock_sendmsg+0xdf/0x110
[   58.192390]  ____sys_sendmsg+0x687/0xae0
[   58.196430]  ? copy_msghdr_from_user+0x20d/0x3f0
[   58.201189]  ? kernel_sendmsg+0x30/0x30
[   58.205162]  ? __fget+0x2ae/0x440
[   58.208608]  ___sys_sendmsg+0xe4/0x160
[   58.212481]  ? sendmsg_copy_msghdr+0x30/0x30
[   58.216874]  ? rcu_read_lock_held+0x9c/0xb0
[   58.221877]  ? rcu_read_lock_held_common+0x170/0x170
[   58.226969]  ? __fget+0x2c8/0x440
[   58.230410]  ? __x64_sys_dup2+0x2e0/0x2e0
[   58.234548]  ? lock_downgrade+0x900/0x900
[   58.238792]  ? __fget_light+0x17f/0x1f0
[   58.242749]  ? __fdget+0xe/0x10
[   58.246014]  __sys_sendmsg+0xd9/0x180
[   58.249797]  ? __sys_sendmsg_sock+0xa0/0xa0
[   58.254133]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   58.259407]  ? __sched_text_start+0x8/0x8
[   58.263570]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   58.268920]  __x64_sys_sendmsg+0x73/0xb0
[   58.272964]  do_syscall_64+0xd0/0x600
[   58.276782]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   58.281949] RIP: 0033:0x452f89
[   58.285139] 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
[   58.304128] RSP: 002b:00007fcdd0c13c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   58.312115] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   58.323694] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   58.330945] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   58.338208] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   58.345544] R13: 00000000ffffffff R14: 00007fcdd0c146d4 R15: 0000000000000002
[   58.352830] CPU: 0 PID: 5001 Comm: syz-executor2 Not tainted 5.5.0-rc1-syzkaller #0
[   58.360634] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   58.370306] Call Trace:
[   58.372901]  <IRQ>
[   58.375274]  dump_stack+0x12f/0x187
[   58.378928]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   58.381463] 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()
[   58.384120]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   58.384126]  ? dccp_parse_options+0x333/0x1000
[   58.384146]  dccp_deliver_input_to_ccids+0xcc/0x220
[   58.384157]  dccp_rcv_established+0x49/0x70
[   58.384165]  dccp_v4_do_rcv+0xf4/0x160
[   58.419793]  __sk_receive_skb+0x2b6/0x9e0
[   58.423927]  ? sk_free+0x60/0x60
[   58.427279]  ? dccp_invalid_packet+0x3ec/0x750
[   58.432806]  dccp_v4_rcv+0xc22/0x1c0b
[   58.436711]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   58.441454]  ip_local_deliver_finish+0x1ee/0x2e0
[   58.446239]  ip_local_deliver+0x306/0x450
[   58.450372]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   58.455285]  ? lock_downgrade+0x900/0x900
[   58.459422]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   58.464354]  ip_rcv_finish+0xb0/0x170
[   58.468150]  ip_rcv+0xcb/0x2f0
[   58.471326]  ? ip_local_deliver+0x450/0x450
[   58.475640]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   58.480990]  ? ip_local_deliver+0x450/0x450
[   58.485551]  __netif_receive_skb_one_core+0x132/0x190
[   58.490721]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   58.495981]  ? lock_acquire+0x194/0x3e0
[   58.499952]  ? process_backlog+0x182/0x6d0
[   58.504170]  __netif_receive_skb+0x1f/0x1b0
[   58.508475]  process_backlog+0x1cb/0x6d0
[   58.512602]  ? __do_softirq+0x248/0x94c
[   58.516715]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   58.521306]  net_rx_action+0x42d/0xde0
[   58.525237]  ? mark_lock+0xc5/0x1200
[   58.528939]  ? napi_busy_loop+0x6e0/0x6e0
[   58.533145]  ? rcu_is_watching+0x31/0x80
[   58.537203]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   58.542056]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   58.547848]  ? __do_softirq+0x1d9/0x94c
[   58.551805]  ? ip_finish_output2+0x709/0x22a0
[   58.556281]  ? trace_hardirqs_on+0x28/0x180
[   58.560594]  __do_softirq+0x248/0x94c
[   58.564480]  ? ip_finish_output2+0x709/0x22a0
[   58.569314]  do_softirq_own_stack+0x2a/0x40
[   58.573701]  </IRQ>
[   58.575922]  do_softirq.part.17+0x11a/0x150
[   58.580225]  __local_bh_enable_ip+0x1ee/0x230
[   58.585047]  ip_finish_output2+0x72d/0x22a0
[   58.589794]  ? ip_frag_next+0xa10/0xa10
[   58.593755]  ? rcu_read_lock_held+0x9c/0xb0
[   58.598064]  ? rcu_read_lock_held_common+0x170/0x170
[   58.603151]  __ip_finish_output+0x401/0xa50
[   58.607459]  ? __ip_finish_output+0x401/0xa50
[   58.611953]  ip_finish_output+0x27/0x170
[   58.616168]  ip_output+0x1c6/0x560
[   58.619695]  ? ip_mc_output+0xd10/0xd10
[   58.623658]  ? __ip_finish_output+0xa50/0xa50
[   58.628220]  ? rcu_read_lock_held_common+0x170/0x170
[   58.633324]  ? rcu_read_lock_held+0x9c/0xb0
[   58.637636]  ip_local_out+0x7e/0x130
[   58.641333]  __ip_queue_xmit+0x6f6/0x1de0
[   58.645468]  ? __skb_checksum+0x7c0/0x7c0
[   58.649682]  ? skb_send_sock_locked+0x750/0x750
[   58.654338]  ? reqsk_fastopen_remove+0x560/0x560
[   58.659194]  ? dccp_insert_options+0x1e2/0xb20
[   58.663761]  ip_queue_xmit+0x45/0x70
[   58.667474]  dccp_transmit_skb+0xb76/0x12a0
[   58.671792]  dccp_xmit_packet+0x1a0/0x580
[   58.675925]  dccp_write_xmit+0x128/0x180
[   58.679975]  dccp_sendmsg+0x68f/0xdb0
[   58.683766]  ? aa_sk_perm+0x182/0x740
[   58.687549]  ? dccp_disconnect+0xa90/0xa90
[   58.691773]  ? aa_af_perm+0x240/0x240
[   58.695570]  inet_sendmsg+0xbd/0xe0
[   58.699176]  ? inet_send_prepare+0x3a0/0x3a0
[   58.703571]  sock_sendmsg+0xdf/0x110
[   58.707268]  ____sys_sendmsg+0x687/0xae0
[   58.711319]  ? copy_msghdr_from_user+0x20d/0x3f0
[   58.717535]  ? kernel_sendmsg+0x30/0x30
[   58.721494]  ? __fget+0x2ae/0x440
[   58.724951]  ___sys_sendmsg+0xe4/0x160
[   58.728908]  ? sendmsg_copy_msghdr+0x30/0x30
[   58.733295]  ? rcu_read_lock_held+0x9c/0xb0
[   58.737608]  ? rcu_read_lock_held_common+0x170/0x170
[   58.742761]  ? __fget+0x2c8/0x440
[   58.746200]  ? __x64_sys_dup2+0x2e0/0x2e0
[   58.750341]  ? lock_downgrade+0x900/0x900
[   58.754478]  ? __fget_light+0x17f/0x1f0
[   58.758434]  ? __fdget+0xe/0x10
[   58.761703]  __sys_sendmsg+0xd9/0x180
[   58.765486]  ? __sys_sendmsg_sock+0xa0/0xa0
[   58.769808]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   58.775149]  ? __sched_text_start+0x8/0x8
[   58.779287]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   58.784637]  __x64_sys_sendmsg+0x73/0xb0
[   58.788684]  do_syscall_64+0xd0/0x600
[   58.792487]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   58.797728] RIP: 0033:0x452f89
[   58.800900] 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
[   58.819796] RSP: 002b:00007f2c64d74c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   58.827499] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   58.834761] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   58.844123] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   58.851385] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   58.858637] R13: 00000000ffffffff R14: 00007f2c64d756d4 R15: 0000000000000002
[   58.865922] CPU: 1 PID: 5006 Comm: syz-executor1 Not tainted 5.5.0-rc1-syzkaller #0
2019/12/11 07:31:07 executed programs: 59
[   58.873771] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   58.883247] Call Trace:
[   58.885824]  <IRQ>
[   58.887977]  dump_stack+0x12f/0x187
[   58.891639]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   58.896848]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   58.901606]  ? dccp_parse_options+0x333/0x1000
[   58.906224]  dccp_deliver_input_to_ccids+0xcc/0x220
[   58.911254]  dccp_rcv_established+0x49/0x70
[   58.915588]  dccp_v4_do_rcv+0xf4/0x160
[   58.919495]  __sk_receive_skb+0x2b6/0x9e0
[   58.923648]  ? sk_free+0x60/0x60
[   58.927015]  ? dccp_invalid_packet+0x3ec/0x750
[   58.931704]  dccp_v4_rcv+0xc22/0x1c0b
[   58.935526]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   58.940292]  ip_local_deliver_finish+0x1ee/0x2e0
[   58.945092]  ip_local_deliver+0x306/0x450
[   58.947832] 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()
[   58.949254]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   58.949261]  ? lock_downgrade+0x900/0x900
[   58.949273]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   58.949290]  ip_rcv_finish+0xb0/0x170
[   58.980217]  ip_rcv+0xcb/0x2f0
[   58.983407]  ? ip_local_deliver+0x450/0x450
[   58.987724]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   58.993080]  ? ip_local_deliver+0x450/0x450
[   58.997400]  __netif_receive_skb_one_core+0x132/0x190
[   59.002573]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   59.007747]  ? lock_acquire+0x194/0x3e0
[   59.011702]  ? process_backlog+0x182/0x6d0
[   59.015921]  __netif_receive_skb+0x1f/0x1b0
[   59.020227]  process_backlog+0x1cb/0x6d0
[   59.024267]  ? __do_softirq+0x248/0x94c
[   59.028230]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   59.032824]  net_rx_action+0x42d/0xde0
[   59.036709]  ? mark_lock+0xc5/0x1200
[   59.040420]  ? napi_busy_loop+0x6e0/0x6e0
[   59.044551]  ? rcu_is_watching+0x31/0x80
[   59.048617]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   59.053464]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   59.058756]  ? __do_softirq+0x1d9/0x94c
[   59.062714]  ? ip_finish_output2+0x709/0x22a0
[   59.067194]  ? trace_hardirqs_on+0x28/0x180
[   59.071605]  __do_softirq+0x248/0x94c
[   59.075400]  ? ip_finish_output2+0x709/0x22a0
[   59.079892]  do_softirq_own_stack+0x2a/0x40
[   59.084199]  </IRQ>
[   59.086504]  do_softirq.part.17+0x11a/0x150
[   59.090809]  __local_bh_enable_ip+0x1ee/0x230
[   59.095290]  ip_finish_output2+0x72d/0x22a0
[   59.099602]  ? ip_frag_next+0xa10/0xa10
[   59.103561]  ? rcu_read_lock_held+0x9c/0xb0
[   59.107862]  ? rcu_read_lock_held_common+0x170/0x170
[   59.112966]  __ip_finish_output+0x401/0xa50
[   59.117275]  ? __ip_finish_output+0x401/0xa50
[   59.121791]  ip_finish_output+0x27/0x170
[   59.125856]  ip_output+0x1c6/0x560
[   59.129388]  ? ip_mc_output+0xd10/0xd10
[   59.133356]  ? __ip_finish_output+0xa50/0xa50
[   59.137834]  ? rcu_read_lock_held_common+0x170/0x170
[   59.142922]  ? rcu_read_lock_held+0x9c/0xb0
[   59.147225]  ip_local_out+0x7e/0x130
[   59.150933]  __ip_queue_xmit+0x6f6/0x1de0
[   59.155061]  ? __skb_checksum+0x7c0/0x7c0
[   59.159190]  ? skb_send_sock_locked+0x750/0x750
[   59.163838]  ? reqsk_fastopen_remove+0x560/0x560
[   59.168573]  ? dccp_insert_options+0x1e2/0xb20
[   59.173154]  ip_queue_xmit+0x45/0x70
[   59.176849]  dccp_transmit_skb+0xb76/0x12a0
[   59.181162]  dccp_xmit_packet+0x1a0/0x580
[   59.185304]  dccp_write_xmit+0x128/0x180
[   59.189347]  dccp_sendmsg+0x68f/0xdb0
[   59.193130]  ? aa_sk_perm+0x182/0x740
[   59.196915]  ? dccp_disconnect+0xa90/0xa90
[   59.201130]  ? aa_af_perm+0x240/0x240
[   59.204928]  inet_sendmsg+0xbd/0xe0
[   59.208556]  ? inet_send_prepare+0x3a0/0x3a0
[   59.212945]  sock_sendmsg+0xdf/0x110
[   59.216643]  ____sys_sendmsg+0x687/0xae0
[   59.220692]  ? copy_msghdr_from_user+0x20d/0x3f0
[   59.225436]  ? kernel_sendmsg+0x30/0x30
[   59.229397]  ? __fget+0x2ae/0x440
[   59.232848]  ___sys_sendmsg+0xe4/0x160
[   59.236716]  ? sendmsg_copy_msghdr+0x30/0x30
[   59.241103]  ? rcu_read_lock_held+0x9c/0xb0
[   59.245404]  ? rcu_read_lock_held_common+0x170/0x170
[   59.250592]  ? find_held_lock+0x36/0x1d0
[   59.254734]  ? __fget+0x2c8/0x440
[   59.258184]  ? __x64_sys_dup2+0x2e0/0x2e0
[   59.262748]  ? trace_hardirqs_on+0x28/0x180
[   59.267051]  ? release_sock+0x122/0x180
[   59.271096]  ? __fget_light+0x17f/0x1f0
[   59.275052]  ? _raw_spin_unlock_bh+0x2b/0x30
[   59.279451]  ? __fdget+0xe/0x10
[   59.282811]  __sys_sendmsg+0xd9/0x180
[   59.286592]  ? __sys_sendmsg_sock+0xa0/0xa0
[   59.290902]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   59.296166]  ? __sys_listen+0x1e8/0x230
[   59.300133]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   59.305482]  __x64_sys_sendmsg+0x73/0xb0
[   59.309558]  do_syscall_64+0xd0/0x600
[   59.313343]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   59.319381] RIP: 0033:0x452f89
[   59.322556] 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
[   59.341448] RSP: 002b:00007f549c3cdc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   59.349140] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   59.356512] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   59.363873] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   59.371134] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   59.378410] R13: 00000000ffffffff R14: 00007f549c3ce6d4 R15: 0000000000000002
[   59.385780] CPU: 0 PID: 5018 Comm: syz-executor Not tainted 5.5.0-rc1-syzkaller #0
[   59.388296] 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()
[   59.393499] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   59.393503] Call Trace:
[   59.393507]  <IRQ>
[   59.393520]  dump_stack+0x12f/0x187
[   59.393537]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   59.393555]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   59.434375]  ? dccp_parse_options+0x333/0x1000
[   59.438968]  dccp_deliver_input_to_ccids+0xcc/0x220
[   59.444495]  dccp_rcv_established+0x49/0x70
[   59.448814]  dccp_v4_do_rcv+0xf4/0x160
[   59.452722]  __sk_receive_skb+0x2b6/0x9e0
[   59.456872]  ? sk_free+0x60/0x60
[   59.460259]  ? dccp_invalid_packet+0x3ec/0x750
[   59.464832]  dccp_v4_rcv+0xc22/0x1c0b
[   59.468631]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   59.473376]  ip_local_deliver_finish+0x1ee/0x2e0
[   59.478124]  ip_local_deliver+0x306/0x450
[   59.482253]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   59.487168]  ? lock_downgrade+0x900/0x900
[   59.491310]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   59.496226]  ip_rcv_finish+0xb0/0x170
[   59.500096]  ip_rcv+0xcb/0x2f0
[   59.503271]  ? ip_local_deliver+0x450/0x450
[   59.507578]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   59.512946]  ? ip_local_deliver+0x450/0x450
[   59.517249]  __netif_receive_skb_one_core+0x132/0x190
[   59.522420]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   59.527601]  ? lock_acquire+0x194/0x3e0
[   59.531554]  ? process_backlog+0x182/0x6d0
[   59.535882]  __netif_receive_skb+0x1f/0x1b0
[   59.540190]  process_backlog+0x1cb/0x6d0
[   59.544243]  ? __do_softirq+0x248/0x94c
[   59.548227]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   59.552986]  net_rx_action+0x42d/0xde0
[   59.556864]  ? mark_lock+0xc5/0x1200
[   59.560564]  ? napi_busy_loop+0x6e0/0x6e0
[   59.564714]  ? rcu_is_watching+0x31/0x80
[   59.568866]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   59.574060]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   59.579772]  ? __do_softirq+0x1d9/0x94c
[   59.583741]  ? ip_finish_output2+0x709/0x22a0
[   59.588317]  ? trace_hardirqs_on+0x28/0x180
[   59.596646]  __do_softirq+0x248/0x94c
[   59.600455]  ? ip_finish_output2+0x709/0x22a0
[   59.604946]  do_softirq_own_stack+0x2a/0x40
[   59.609251]  </IRQ>
[   59.611476]  do_softirq.part.17+0x11a/0x150
[   59.615804]  __local_bh_enable_ip+0x1ee/0x230
[   59.620289]  ip_finish_output2+0x72d/0x22a0
[   59.624613]  ? ip_frag_next+0xa10/0xa10
[   59.628581]  ? rcu_read_lock_held+0x9c/0xb0
[   59.632893]  ? rcu_read_lock_held_common+0x170/0x170
[   59.637982]  __ip_finish_output+0x401/0xa50
[   59.642392]  ? __ip_finish_output+0x401/0xa50
[   59.646888]  ip_finish_output+0x27/0x170
[   59.651031]  ip_output+0x1c6/0x560
[   59.654607]  ? ip_mc_output+0xd10/0xd10
[   59.658578]  ? __ip_finish_output+0xa50/0xa50
[   59.663060]  ? rcu_read_lock_held_common+0x170/0x170
[   59.669623]  ? rcu_read_lock_held+0x9c/0xb0
[   59.673936]  ip_local_out+0x7e/0x130
[   59.677701]  __ip_queue_xmit+0x6f6/0x1de0
[   59.681848]  ? __skb_checksum+0x7c0/0x7c0
[   59.686147]  ? skb_send_sock_locked+0x750/0x750
[   59.690804]  ? reqsk_fastopen_remove+0x560/0x560
[   59.695553]  ? dccp_insert_options+0x1e2/0xb20
[   59.700226]  ip_queue_xmit+0x45/0x70
[   59.703923]  dccp_transmit_skb+0xb76/0x12a0
[   59.708265]  dccp_xmit_packet+0x1a0/0x580
[   59.712486]  dccp_write_xmit+0x128/0x180
[   59.717171]  dccp_sendmsg+0x68f/0xdb0
[   59.720964]  ? aa_sk_perm+0x182/0x740
[   59.724749]  ? dccp_disconnect+0xa90/0xa90
[   59.728965]  ? aa_af_perm+0x240/0x240
[   59.732770]  inet_sendmsg+0xbd/0xe0
[   59.736379]  ? inet_send_prepare+0x3a0/0x3a0
[   59.740778]  sock_sendmsg+0xdf/0x110
[   59.744472]  ____sys_sendmsg+0x687/0xae0
[   59.749159]  ? copy_msghdr_from_user+0x20d/0x3f0
[   59.754102]  ? kernel_sendmsg+0x30/0x30
[   59.758070]  ? __fget+0x2ae/0x440
[   59.761602]  ___sys_sendmsg+0xe4/0x160
[   59.765646]  ? sendmsg_copy_msghdr+0x30/0x30
[   59.770038]  ? rcu_read_lock_held+0x9c/0xb0
[   59.774436]  ? rcu_read_lock_held_common+0x170/0x170
[   59.779515]  ? find_held_lock+0x36/0x1d0
[   59.783562]  ? __fget+0x2c8/0x440
[   59.787100]  ? __x64_sys_dup2+0x2e0/0x2e0
[   59.791694]  ? trace_hardirqs_on+0x28/0x180
[   59.796007]  ? release_sock+0x122/0x180
[   59.799970]  ? __fget_light+0x17f/0x1f0
[   59.803949]  ? _raw_spin_unlock_bh+0x2b/0x30
[   59.809234]  ? __fdget+0xe/0x10
[   59.812528]  __sys_sendmsg+0xd9/0x180
[   59.816336]  ? __sys_sendmsg_sock+0xa0/0xa0
[   59.820667]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   59.825960]  ? __sched_text_start+0x8/0x8
[   59.830099]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   59.835536]  __x64_sys_sendmsg+0x73/0xb0
[   59.839598]  do_syscall_64+0xd0/0x600
[   59.843383]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   59.848646] RIP: 0033:0x452f89
[   59.851836] 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
[   59.870900] RSP: 002b:00007fcdd0c13c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   59.878598] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   59.886458] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   59.893709] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   59.901044] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   59.908292] R13: 00000000ffffffff R14: 00007fcdd0c146d4 R15: 0000000000000002
[   59.915585] CPU: 1 PID: 5019 Comm: syz-executor2 Not tainted 5.5.0-rc1-syzkaller #0
[   59.923381] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   59.932811] Call Trace:
[   59.935374]  <IRQ>
[   59.938809]  dump_stack+0x12f/0x187
[   59.942441]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   59.947708]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   59.952573]  ? dccp_parse_options+0x333/0x1000
[   59.957159]  dccp_deliver_input_to_ccids+0xcc/0x220
[   59.962166]  dccp_rcv_established+0x49/0x70
[   59.966467]  dccp_v4_do_rcv+0xf4/0x160
[   59.970338]  __sk_receive_skb+0x2b6/0x9e0
[   59.974483]  ? sk_free+0x60/0x60
[   59.977838]  ? dccp_invalid_packet+0x3ec/0x750
[   59.982413]  dccp_v4_rcv+0xc22/0x1c0b
[   59.986209]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   59.990957]  ip_local_deliver_finish+0x1ee/0x2e0
[   59.996324]  ip_local_deliver+0x306/0x450
[   60.000476]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   60.005384]  ? lock_downgrade+0x900/0x900
[   60.009643]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   60.014595]  ip_rcv_finish+0xb0/0x170
[   60.018397]  ip_rcv+0xcb/0x2f0
[   60.022136]  ? ip_local_deliver+0x450/0x450
[   60.026450]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   60.031806]  ? ip_local_deliver+0x450/0x450
[   60.036117]  __netif_receive_skb_one_core+0x132/0x190
[   60.042356]  ? __netif_receive_skb_core+0x2a00/0x2a00
[   60.047922]  ? lock_acquire+0x194/0x3e0
[   60.052403]  ? process_backlog+0x182/0x6d0
[   60.056645]  __netif_receive_skb+0x1f/0x1b0
[   60.060957]  process_backlog+0x1cb/0x6d0
[   60.065055]  ? __do_softirq+0x248/0x94c
[   60.069100]  ? lockdep_hardirqs_on+0x1a1/0x5d0
[   60.073848]  net_rx_action+0x42d/0xde0
[   60.077718]  ? mark_lock+0xc5/0x1200
[   60.081427]  ? napi_busy_loop+0x6e0/0x6e0
[   60.085640]  ? rcu_is_watching+0x31/0x80
[   60.089698]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   60.094549]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   60.099802]  ? __do_softirq+0x1d9/0x94c
[   60.103757]  ? ip_finish_output2+0x709/0x22a0
[   60.108240]  ? trace_hardirqs_on+0x28/0x180
[   60.112551]  __do_softirq+0x248/0x94c
[   60.116453]  ? ip_finish_output2+0x709/0x22a0
[   60.120928]  do_softirq_own_stack+0x2a/0x40
[   60.125229]  </IRQ>
[   60.127448]  do_softirq.part.17+0x11a/0x150
[   60.131750]  __local_bh_enable_ip+0x1ee/0x230
[   60.136322]  ip_finish_output2+0x72d/0x22a0
[   60.140634]  ? ip_frag_next+0xa10/0xa10
[   60.145471]  ? rcu_read_lock_held+0x9c/0xb0
[   60.149795]  ? rcu_read_lock_held_common+0x170/0x170
[   60.154895]  __ip_finish_output+0x401/0xa50
[   60.159219]  ? __ip_finish_output+0x401/0xa50
[   60.163707]  ip_finish_output+0x27/0x170
[   60.167764]  ip_output+0x1c6/0x560
[   60.171549]  ? ip_mc_output+0xd10/0xd10
[   60.175505]  ? __ip_finish_output+0xa50/0xa50
[   60.179978]  ? rcu_read_lock_held_common+0x170/0x170
[   60.185157]  ? rcu_read_lock_held+0x9c/0xb0
[   60.189461]  ip_local_out+0x7e/0x130
[   60.193506]  __ip_queue_xmit+0x6f6/0x1de0
[   60.197632]  ? __skb_checksum+0x7c0/0x7c0
[   60.201756]  ? skb_send_sock_locked+0x750/0x750
[   60.207008]  ? reqsk_fastopen_remove+0x560/0x560
[   60.212436]  ? dccp_insert_options+0x1e2/0xb20
[   60.217023]  ip_queue_xmit+0x45/0x70
[   60.220813]  dccp_transmit_skb+0xb76/0x12a0
[   60.225128]  dccp_xmit_packet+0x1a0/0x580
[   60.229293]  dccp_write_xmit+0x128/0x180
[   60.233357]  dccp_sendmsg+0x68f/0xdb0
[   60.237157]  ? aa_sk_perm+0x182/0x740
[   60.240942]  ? dccp_disconnect+0xa90/0xa90
[   60.245524]  ? aa_af_perm+0x240/0x240
[   60.249324]  inet_sendmsg+0xbd/0xe0
[   60.253571]  ? inet_send_prepare+0x3a0/0x3a0
[   60.258080]  sock_sendmsg+0xdf/0x110
[   60.261781]  ____sys_sendmsg+0x687/0xae0
[   60.265853]  ? copy_msghdr_from_user+0x20d/0x3f0
[   60.270605]  ? kernel_sendmsg+0x30/0x30
[   60.274567]  ? __fget+0x2ae/0x440
[   60.278010]  ___sys_sendmsg+0xe4/0x160
[   60.281890]  ? sendmsg_copy_msghdr+0x30/0x30
[   60.286288]  ? rcu_read_lock_held+0x9c/0xb0
[   60.290597]  ? rcu_read_lock_held_common+0x170/0x170
[   60.295764]  ? find_held_lock+0x36/0x1d0
[   60.299809]  ? __fget+0x2c8/0x440
[   60.303246]  ? __x64_sys_dup2+0x2e0/0x2e0
[   60.307376]  ? trace_hardirqs_on+0x28/0x180
[   60.312148]  ? release_sock+0x122/0x180
[   60.316119]  ? __fget_light+0x17f/0x1f0
[   60.320096]  ? _raw_spin_unlock_bh+0x2b/0x30
[   60.324487]  ? __fdget+0xe/0x10
[   60.327771]  __sys_sendmsg+0xd9/0x180
[   60.332425]  ? __sys_sendmsg_sock+0xa0/0xa0
[   60.336739]  ? rcu_read_lock_any_held.part.8+0x50/0x50
[   60.342009]  ? __sched_text_start+0x8/0x8
[   60.346164]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   60.352055]  __x64_sys_sendmsg+0x73/0xb0
[   60.356099]  do_syscall_64+0xd0/0x600
[   60.359892]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   60.365064] RIP: 0033:0x452f89
[   60.368238] 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
[   60.387118] RSP: 002b:00007f2c64d74c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
[   60.394802] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452f89
[   60.402049] RDX: 0000000000000080 RSI: 00000000206c8000 RDI: 0000000000000005
[   60.409313] RBP: 000000000000048a R08: 0000000000000000 R09: 0000000000000000
[   60.416571] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4d90
[   60.423913] R13: 00000000ffffffff R14: 00007f2c64d756d4 R15: 0000000000000002
[   60.492667] 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()
[   60.499562] 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()
[   60.506232] CPU: 0 PID: 5036 Comm: syz-executor Not tainted 5.5.0-rc1-syzkaller #0
[   60.506237] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   60.537424] Call Trace:
[   60.539997]  <IRQ>
[   60.542137]  dump_stack+0x12f/0x187
[   60.545755]  tfrc_rx_hist_sample_rtt.cold.3+0x47/0x4c
[   60.550932]  ccid3_hc_rx_packet_recv+0x471/0xec0
[   60.555669]  ? dccp_parse_options+0x333/0x1000
[   60.560248]  dccp_deliver_input_to_ccids+0xcc/0x220
[   60.565249]  dccp_rcv_established+0x49/0x70
[   60.569569]  dccp_v4_do_rcv+0xf4/0x160
[   60.573438]  __sk_receive_skb+0x2b6/0x9e0
[   60.577584]  ? sk_free+0x60/0x60
[   60.581020]  ? dccp_invalid_packet+0x3ec/0x750
[   60.585594]  dccp_v4_rcv+0xc22/0x1c0b
[   60.589392]  ip_protocol_deliver_rcu+0x50b/0x6b0
[   60.594156]  ip_local_deliver_finish+0x1ee/0x2e0
[   60.598893]  ip_local_deliver+0x306/0x450
[   60.603033]  ? ip_local_deliver_finish+0x2e0/0x2e0
[   60.607961]  ? lock_downgrade+0x900/0x900
[   60.612090]  ? ip_protocol_deliver_rcu+0x6b0/0x6b0
[   60.617100]  ip_rcv_finish+0xb0/0x170
[   60.620893]  ip_rcv+0xcb/0x2f0
[   60.624075]  ? ip_local_deliver+0x450/0x450
[   60.628382]  ? ip_rcv_finish_core.isra.16+0x1b90/0x1b90
[   60.633836]  ? ip_local_deliver+0x450/0x450
[   60.638403]  __netif_receive_skb_one_core+0x132/0x190