BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() CPU: 1 PID: 12000 Comm: syz-executor.0 Not tainted 6.3.0-rc4-syzkaller-00204-g24e3fce00c0b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x136/0x150 lib/dump_stack.c:106 ccid3_update_send_interval net/dccp/ccids/ccid3.c:90 [inline] ccid3_update_send_interval+0x187/0x1c0 net/dccp/ccids/ccid3.c:86 ccid3_hc_tx_update_s net/dccp/ccids/ccid3.c:169 [inline] ccid3_hc_tx_packet_sent+0x132/0x190 net/dccp/ccids/ccid3.c:353 ccid_hc_tx_packet_sent net/dccp/ccid.h:175 [inline] dccp_xmit_packet+0x2f2/0x760 net/dccp/output.c:289 dccp_write_xmit+0x171/0x1d0 net/dccp/output.c:366 dccp_sendmsg+0xa50/0xc00 net/dccp/proto.c:788 inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:825 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 __sys_sendto+0x23a/0x340 net/socket.c:2142 __do_sys_sendto net/socket.c:2154 [inline] __se_sys_sendto net/socket.c:2150 [inline] __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2150 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3c8408c169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3c82bdd168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f3c841ac050 RCX: 00007f3c8408c169 RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000004 RBP: 00007f3c840e7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc4bbec11f R14: 00007f3c82bdd300 R15: 0000000000022000 BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() CPU: 0 PID: 12000 Comm: syz-executor.0 Not tainted 6.3.0-rc4-syzkaller-00204-g24e3fce00c0b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x136/0x150 lib/dump_stack.c:106 ccid3_update_send_interval net/dccp/ccids/ccid3.c:90 [inline] ccid3_update_send_interval+0x187/0x1c0 net/dccp/ccids/ccid3.c:86 ccid3_hc_tx_update_s net/dccp/ccids/ccid3.c:169 [inline] ccid3_hc_tx_packet_sent+0x132/0x190 net/dccp/ccids/ccid3.c:353 ccid_hc_tx_packet_sent net/dccp/ccid.h:175 [inline] dccp_xmit_packet+0x2f2/0x760 net/dccp/output.c:289 dccp_write_xmit+0x171/0x1d0 net/dccp/output.c:366 dccp_sendmsg+0xa50/0xc00 net/dccp/proto.c:788 inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:825 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 __sys_sendto+0x23a/0x340 net/socket.c:2142 __do_sys_sendto net/socket.c:2154 [inline] __se_sys_sendto net/socket.c:2150 [inline] __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2150 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3c8408c169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3c82bdd168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f3c841ac050 RCX: 00007f3c8408c169 RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000004 RBP: 00007f3c840e7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc4bbec11f R14: 00007f3c82bdd300 R15: 0000000000022000