------------[ cut here ]------------
WARNING: CPU: 1 PID: 13668 at kernel/signal.c:2050 posixtimer_send_sigqueue+0xa08/0xce0 kernel/signal.c:2050
Modules linked in:
CPU: 1 UID: 0 PID: 13668 Comm: syz.2.1418 Not tainted 6.13.0-rc7-syzkaller-00189-g595523945be0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:posixtimer_send_sigqueue+0xa08/0xce0 kernel/signal.c:2050
Code: 00 0f 85 f4 02 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 23 1e 3b 00 4c 8b 64 24 08 e9 28 ff ff ff 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 80 3c 03 00 74 08 4c 89 f7
RSP: 0018:ffffc90000a18c00 EFLAGS: 00010082
RAX: dffffc0000000000 RBX: 1ffff1100f4a656b RCX: ffff88807b213c00
RDX: 0000000000010000 RSI: 0000000000002000 RDI: 0000000000000000
RBP: ffffc90000a18cf8 R08: ffffffff81647150 R09: 1ffffffff2854b12
R10: dffffc0000000000 R11: fffffbfff2854b13 R12: ffff88807a532b40
R13: 1ffff1100f4a6578 R14: ffff88807a532b58 R15: ffff88807a532c00
FS:  00005555795ee500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fba78364d58 CR3: 000000007ef2a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 posix_timer_queue_signal kernel/time/posix-timers.c:308 [inline]
 posix_timer_fn+0xe2/0x160 kernel/time/posix-timers.c:323
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x59b/0xd30 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 4a 09 af f5 48 89 df e8 82 50 b0 f5 e8 0d 5f db f5 fb bf 01 00 00 00 <e8> a2 b5 a1 f5 65 8b 05 13 f8 37 74 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc90004ae78f0 EFLAGS: 00000286
RAX: 0a02c46394e17b00 RBX: ffffffff8e96e880 RCX: ffffffff817b387a
RDX: dffffc0000000000 RSI: ffffffff8c0a98e0 RDI: 0000000000000001
RBP: ffffc90004ae79d0 R08: ffffffff942a5897 R09: 1ffffffff2854b12
R10: dffffc0000000000 R11: fffffbfff2854b13 R12: 0000000000400040
R13: ffffc90004ae7d60 R14: 0000000f00000000 R15: 1ffff9200095cf2c
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 cgroup_post_fork+0x34f/0x880 kernel/cgroup/cgroup.c:6725
 copy_process+0x39e9/0x3d50 kernel/fork.c:2620
 kernel_clone+0x226/0x8e0 kernel/fork.c:2806
 __do_sys_clone3 kernel/fork.c:3110 [inline]
 __se_sys_clone3+0x2d8/0x360 kernel/fork.c:3089
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba775ba589
Code: 1b 08 00 48 8d 3d fc 1b 08 00 e8 12 29 f6 ff 66 90 b8 ea ff ff ff 48 85 ff 74 2c 48 85 d2 74 27 49 89 c8 b8 b3 01 00 00 0f 05 <48> 85 c0 7c 18 74 01 c3 31 ed 48 83 e4 f0 4c 89 c7 ff d2 48 89 c7
RSP: 002b:00007fba7789f8f8 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007fba7753c9a0 RCX: 00007fba775ba589
RDX: 00007fba7753c9a0 RSI: 0000000000000058 RDI: 00007fba7789f940
RBP: 00007fba783646c0 R08: 00007fba783646c0 R09: 00007fba7789fa27
R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffa8
R13: 000000000000006e R14: 00007fba7789f940 R15: 00007fba7789fa28
 </TASK>
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	f3 0f 1e fa          	endbr64
   5:	53                   	push   %rbx
   6:	48 89 fb             	mov    %rdi,%rbx
   9:	48 83 c7 18          	add    $0x18,%rdi
   d:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
  12:	e8 4a 09 af f5       	call   0xf5af0961
  17:	48 89 df             	mov    %rbx,%rdi
  1a:	e8 82 50 b0 f5       	call   0xf5b050a1
  1f:	e8 0d 5f db f5       	call   0xf5db5f31
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 a2 b5 a1 f5       	call   0xf5a1b5d1 <-- trapping instruction
  2f:	65 8b 05 13 f8 37 74 	mov    %gs:0x7437f813(%rip),%eax        # 0x7437f849
  36:	85 c0                	test   %eax,%eax
  38:	74 06                	je     0x40
  3a:	5b                   	pop    %rbx
  3b:	c3                   	ret
  3c:	cc                   	int3
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	cc                   	int3