Oops: divide error: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 9609 Comm: syz.2.1281 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [  374.261034][ T9609] Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:div_u64_rem include/linux/math64.h:29 [inline]
RIP: 0010:div_u64 include/linux/math64.h:130 [inline]
RIP: 0010:tcp_rcvbuf_grow net/ipv4/tcp_input.c:-1 [inline]
RIP: 0010:tcp_rcv_space_adjust+0x401/0xba0 net/ipv4/tcp_input.c:988
Code: 41 29 ec 4d 0f af f4 4d 01 f6 4d 89 f5 89 e9 4c 89 e8 48 c1 e8 20 74 0d 4c 89 e8 31 d2 48 f7 f1 49 89 c4 eb 0a 44 89 e8 31 d2 <f7> f1 41 89 c4 4c 8d ab c0 0b 00 00 4c 89 e8 48 c1 e8 03 48 b9 00
RSP: 0018:ffffc90005bbf490 EFLAGS: 00010246
RAX: 0000000000010000 RBX: ffff8880359fde80 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 00000000000000a3 RDI: 00000000000000a4
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f5e967 R12: 0000000000000080
R13: 0000000000010000 R14: 0000000000010000 R15: 0000000000000100
FS:  00007ff58db656c0(0000) GS:ffff888125c46000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555591b7ca38 CR3: 0000000069f16000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 tcp_recvmsg_locked+0x1fa0/0x3840 net/ipv4/tcp.c:2880
 tcp_recvmsg+0xf6/0x540 net/ipv4/tcp.c:2944
 sock_recvmsg_nosec net/socket.c:1128 [inline]
 sock_recvmsg+0x166/0x1e0 net/socket.c:1148
 ____sys_recvmsg+0x1f2/0x4b0 net/socket.c:2904
 ___sys_recvmsg+0x213/0x5a0 net/socket.c:2946
 __sys_recvmsg net/socket.c:2979 [inline]
 __do_sys_recvmsg net/socket.c:2985 [inline]
 __se_sys_recvmsg net/socket.c:2982 [inline]
 __x64_sys_recvmsg+0x1b4/0x290 net/socket.c:2982
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff58f92e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff58db65028 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007ff58fbb6090 RCX: 00007ff58f92e0d9
RDX: 0000000000000700 RSI: 0000200000000580 RDI: 0000000000000003
RBP: 00007ff58f9c5024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff58fbb6128 R14: 00007ff58fbb6090 R15: 00007ffcc01e2a08
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:div_u64_rem include/linux/math64.h:29 [inline]
RIP: 0010:div_u64 include/linux/math64.h:130 [inline]
RIP: 0010:tcp_rcvbuf_grow net/ipv4/tcp_input.c:-1 [inline]
RIP: 0010:tcp_rcv_space_adjust+0x401/0xba0 net/ipv4/tcp_input.c:988
Code: 41 29 ec 4d 0f af f4 4d 01 f6 4d 89 f5 89 e9 4c 89 e8 48 c1 e8 20 74 0d 4c 89 e8 31 d2 48 f7 f1 49 89 c4 eb 0a 44 89 e8 31 d2 <f7> f1 41 89 c4 4c 8d ab c0 0b 00 00 4c 89 e8 48 c1 e8 03 48 b9 00
RSP: 0018:ffffc90005bbf490 EFLAGS: 00010246
RAX: 0000000000010000 RBX: ffff8880359fde80 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 00000000000000a3 RDI: 00000000000000a4
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f5e967 R12: 0000000000000080
R13: 0000000000010000 R14: 0000000000010000 R15: 0000000000000100
FS:  00007ff58db656c0(0000) GS:ffff888125d46000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31c22ff8 CR3: 0000000069f16000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	41 29 ec             	sub    %ebp,%r12d
   3:	4d 0f af f4          	imul   %r12,%r14
   7:	4d 01 f6             	add    %r14,%r14
   a:	4d 89 f5             	mov    %r14,%r13
   d:	89 e9                	mov    %ebp,%ecx
   f:	4c 89 e8             	mov    %r13,%rax
  12:	48 c1 e8 20          	shr    $0x20,%rax
  16:	74 0d                	je     0x25
  18:	4c 89 e8             	mov    %r13,%rax
  1b:	31 d2                	xor    %edx,%edx
  1d:	48 f7 f1             	div    %rcx
  20:	49 89 c4             	mov    %rax,%r12
  23:	eb 0a                	jmp    0x2f
  25:	44 89 e8             	mov    %r13d,%eax
  28:	31 d2                	xor    %edx,%edx
* 2a:	f7 f1                	div    %ecx <-- trapping instruction
  2c:	41 89 c4             	mov    %eax,%r12d
  2f:	4c 8d ab c0 0b 00 00 	lea    0xbc0(%rbx),%r13
  36:	4c 89 e8             	mov    %r13,%rax
  39:	48 c1 e8 03          	shr    $0x3,%rax
  3d:	48                   	rex.W
  3e:	b9                   	.byte 0xb9