BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() CPU: 2 PID: 5704 Comm: syz-executor315 Not tainted 6.7.0-rc4-syzkaller-00009-gbee0e7762ad2 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106 ccid3_update_send_interval net/dccp/ccids/ccid3.c:90 [inline] ccid3_update_send_interval+0x18e/0x1c0 net/dccp/ccids/ccid3.c:86 ccid3_hc_tx_update_s net/dccp/ccids/ccid3.c:169 [inline] ccid3_hc_tx_packet_sent+0x134/0x190 net/dccp/ccids/ccid3.c:353 ccid_hc_tx_packet_sent net/dccp/ccid.h:175 [inline] dccp_xmit_packet+0x27b/0x710 net/dccp/output.c:289 dccp_write_xmit+0x16c/0x1d0 net/dccp/output.c:366 dccp_sendmsg+0x96a/0xcc0 net/dccp/proto.c:801 inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:847 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 ____sys_sendmsg+0x2ac/0x940 net/socket.c:2584 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638 __sys_sendmmsg+0x1a1/0x450 net/socket.c:2724 __do_sys_sendmmsg net/socket.c:2753 [inline] __se_sys_sendmmsg net/socket.c:2750 [inline] __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2750 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f9090830a99 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f90907d0228 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f9090830a99 RDX: 0000000000000503 RSI: 0000000020000ac0 RDI: 0000000000000004 RBP: 00007f90908bb338 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f90908bb330 R13: 00007f9090888074 R14: 00007fffe114dcc0 R15: 00007fffe114dda8