divide error: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 3614 Comm: syz-executor380 Not tainted 5.17.0-rc8-syzkaller-00072-g97e9c8eb4bb1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:tcp_cong_avoid_ai net/ipv4/tcp_cong.c:420 [inline]
RIP: 0010:tcp_reno_cong_avoid+0x288/0x310 net/ipv4/tcp_cong.c:450
Code: ab 80 09 00 00 e8 18 76 bb f9 45 85 e4 0f 85 aa fe ff ff 5b 5d 41 5c 41 5d 41 5e e9 62 74 bb f9 e8 5d 74 bb f9 44 89 e0 31 d2 <f7> f5 41 01 c5 89 93 84 09 00 00 44 89 ab 80 09 00 00 e9 fb fe ff
RSP: 0018:ffffc900027876b0 EFLAGS: 00010246
RAX: 0000000000000011 RBX: ffff8880736a20c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff87bc8133 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff87bc8035 R11: 0000000000000000 R12: 0000000000000011
R13: 0000000000000001 R14: 00000000ffffffff R15: ffff8880736a2a40
FS: 0000555556ccf300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020102000 CR3: 000000001d16d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
tcp_cdg_cong_avoid+0x5d6/0x1600 net/ipv4/tcp_cdg.c:293
tcp_cong_avoid net/ipv4/tcp_input.c:3133 [inline]
tcp_cong_control net/ipv4/tcp_input.c:3490 [inline]
tcp_ack+0x3766/0x5900 net/ipv4/tcp_input.c:3891
tcp_rcv_established+0x5d9/0x1ff0 net/ipv4/tcp_input.c:5938
tcp_v4_do_rcv+0x65e/0x980 net/ipv4/tcp_ipv4.c:1719
sk_backlog_rcv include/net/sock.h:1037 [inline]
__release_sock+0x134/0x3b0 net/core/sock.c:2779
__sk_flush_backlog+0x22/0x30 net/core/sock.c:2799
sk_flush_backlog include/net/sock.h:1127 [inline]
tcp_sendmsg_locked+0x2836/0x2e20 net/ipv4/tcp.c:1294
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1449
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
sock_sendmsg_nosec net/socket.c:705 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:725
__sys_sendto+0x21c/0x320 net/socket.c:2040
__do_sys_sendto net/socket.c:2052 [inline]
__se_sys_sendto net/socket.c:2048 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:2048
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7069a8c559
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 15 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd628436b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f7069a8c559
RDX: 00000000fffffd46 RSI: 0000000020000240 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000001f4
R10: 00000000000081f4 R11: 0000000000000246 R12: 00007ffd628436e0
R13: 00007ffd628436f0 R14: 000000000000caaa R15: 00007ffd628436d0
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:tcp_cong_avoid_ai net/ipv4/tcp_cong.c:420 [inline]
RIP: 0010:tcp_reno_cong_avoid+0x288/0x310 net/ipv4/tcp_cong.c:450
Code: ab 80 09 00 00 e8 18 76 bb f9 45 85 e4 0f 85 aa fe ff ff 5b 5d 41 5c 41 5d 41 5e e9 62 74 bb f9 e8 5d 74 bb f9 44 89 e0 31 d2 <f7> f5 41 01 c5 89 93 84 09 00 00 44 89 ab 80 09 00 00 e9 fb fe ff
RSP: 0018:ffffc900027876b0 EFLAGS: 00010246
RAX: 0000000000000011 RBX: ffff8880736a20c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff87bc8133 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff87bc8035 R11: 0000000000000000 R12: 0000000000000011
R13: 0000000000000001 R14: 00000000ffffffff R15: ffff8880736a2a40
FS: 0000555556ccf300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7069b0f110 CR3: 000000001d16d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: ab stos %eax,%es:(%rdi)
1: 80 09 00 orb $0x0,(%rcx)
4: 00 e8 add %ch,%al
6: 18 76 bb sbb %dh,-0x45(%rsi)
9: f9 stc
a: 45 85 e4 test %r12d,%r12d
d: 0f 85 aa fe ff ff jne 0xfffffebd
13: 5b pop %rbx
14: 5d pop %rbp
15: 41 5c pop %r12
17: 41 5d pop %r13
19: 41 5e pop %r14
1b: e9 62 74 bb f9 jmpq 0xf9bb7482
20: e8 5d 74 bb f9 callq 0xf9bb7482
25: 44 89 e0 mov %r12d,%eax
28: 31 d2 xor %edx,%edx
* 2a: f7 f5 div %ebp <-- trapping instruction
2c: 41 01 c5 add %eax,%r13d
2f: 89 93 84 09 00 00 mov %edx,0x984(%rbx)
35: 44 89 ab 80 09 00 00 mov %r13d,0x980(%rbx)
3c: e9 .byte 0xe9
3d: fb sti
3e: fe (bad)
3f: ff .byte 0xff