------------[ cut here ]------------
WARNING: CPU: 0 PID: 10496 at kernel/rcu/tree_stall.h:937 rcu_check_gp_start_stall+0x2c8/0x450 kernel/rcu/tree_stall.h:922
Modules linked in:
CPU: 0 PID: 10496 Comm: syz.2.1157 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:rcu_check_gp_start_stall+0x2c8/0x450 kernel/rcu/tree_stall.h:937
Code: c7 c7 60 dc 8a 96 be 04 00 00 00 e8 b2 87 5e 00 b8 01 00 00 00 87 05 d7 3d 1f 15 85 c0 0f 85 1c ff ff ff 48 c7 c0 00 3c 92 8c <0f> 0b 49 39 c7 74 47 48 c7 c0 44 94 e9 8d 48 c1 e8 03 42 0f b6 04
RSP: 0018:ffffc90000007bd8 EFLAGS: 00010046
RAX: ffffffff8c923c00 RBX: 000000010000957b RCX: ffffffff816b9e7e
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff968adc60
RBP: ffffc90000007e10 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000246 R15: ffffffff8c923c00
FS: 00007efd04a226c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 0000000068e29000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
rcu_core+0x657/0x1650 kernel/rcu/tree.c:2758
handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
__do_softirq kernel/softirq.c:592 [inline]
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x157/0x240 kernel/softirq.c:641
irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 51 67 f6 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 4e ed 24 f7 48 89 df e8 26 41 26 f7 e8 f1 f4 48 f7 fb bf 01 00 00 00 <e8> 06 87 19 f7 65 8b 05 87 89 c4 75 85 c0 74 02 5b c3 e8 54 a6 c2
RSP: 0018:ffffc90003207bc0 EFLAGS: 00000282
RAX: cc21978e3ea6cd00 RBX: ffff88807b2a9280 RCX: ffffffff96868f03
RDX: dffffc0000000000 RSI: ffffffff8a8b2b00 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff8186db50 R09: ffffed100f655251
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000021
R13: dffffc0000000000 R14: ffff88807b2a9718 R15: ffff88807b2a9280
spin_unlock_irq include/linux/spinlock.h:413 [inline]
get_signal+0x13ee/0x14e0 kernel/signal.c:2900
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:154 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7efd065a9ef7
Code: ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89
RSP: 002b:00007efd04a22038 EFLAGS: 00000246
RAX: 0000000000000049 RBX: 00007efd06761f80 RCX: 00007efd065a9ef9
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000005
RBP: 00007efd0661cb76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007efd06761f80 R15: 00007fffa6e17d58
</TASK>
----------------
Code disassembly (best guess):
0: 51 push %rcx
1: 67 f6 ff addr32 idiv %bh
4: 90 nop
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 4e ed 24 f7 call 0xf724ed65
17: 48 89 df mov %rbx,%rdi
1a: e8 26 41 26 f7 call 0xf7264145
1f: e8 f1 f4 48 f7 call 0xf748f515
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 06 87 19 f7 call 0xf7198735 <-- trapping instruction
2f: 65 8b 05 87 89 c4 75 mov %gs:0x75c48987(%rip),%eax # 0x75c489bd
36: 85 c0 test %eax,%eax
38: 74 02 je 0x3c
3a: 5b pop %rbx
3b: c3 ret
3c: e8 .byte 0xe8
3d: 54 push %rsp
3e: a6 cmpsb %es:(%rdi),%ds:(%rsi)
3f: c2 .byte 0xc2