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WARNING: CPU: 0 PID: 7809 at kernel/rcu/tree_stall.h:970 rcu_check_gp_start_stall+0x2c8/0x450 kernel/rcu/tree_stall.h:955
Modules linked in:
CPU: 0 PID: 7809 Comm: syz-executor.0 Not tainted 6.1.94-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:rcu_check_gp_start_stall+0x2c8/0x450 kernel/rcu/tree_stall.h:970
Code: c7 c7 40 9f cd 91 be 04 00 00 00 e8 e2 2c 6e 00 b8 01 00 00 00 87 05 d7 b6 59 10 85 c0 0f 85 1c ff ff ff 48 c7 c0 40 fb 12 8d <0f> 0b 49 39 c7 74 47 48 c7 c0 e4 be 73 8e 48 c1 e8 03 42 0f b6 04
RSP: 0018:ffffc90000007b98 EFLAGS: 00010046
RAX: ffffffff8d12fb40 RBX: 0000000100000ae0 RCX: ffffffff8173e85e
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff91cd9f40
RBP: ffffc90000007df0 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8880b983b8d2 R14: 0000000000000246 R15: ffffffff8d12fb40
FS: 00005555561d2480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000202a1000 CR3: 0000000056c1c000 CR4: 00000000003506f0
Call Trace:
rcu_core+0x699/0x1810 kernel/rcu/tree.c:2551
handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
__do_softirq kernel/softirq.c:605 [inline]
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: b1 bc f5 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 7e 2f d5 f6 48 89 df e8 e6 6c d6 f6 e8 01 f9 fb f6 fb bf 01 00 00 00 56 05 c9 f6 65 8b 05 47 12 6d 75 85 c0 74 02 5b c3 e8 f4 35 6b
RSP: 0018:ffffc9000513fb30 EFLAGS: 00000286
RAX: c74b1e57dd53a500 RBX: ffff888015f95c80 RCX: ffffffff91c95103
RDX: dffffc0000000000 RSI: ffffffff8aec0240 RDI: 0000000000000001
RBP: ffffc9000513fc70 R08: dffffc0000000000 R09: ffffed1002bf2b91
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11002bf2c23
R13: 000000001c000004 R14: 0000000000000021 R15: ffff888015f96118
spin_unlock_irq include/linux/spinlock.h:401 [inline]
get_signal+0x154b/0x17d0 kernel/signal.c:2865
arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc448c2afc0
Code: 00 b9 06 00 00 00 89 da 4c 89 fe 49 89 c0 48 8d 3d 35 e1 09 00 31 c0 e8 fe b2 ff ff eb c8 66 66 2e 0f 1f 84 00 00 00 00 00 90 <48> 8b 0d 11 a7 cb 00 4c 63 05 fa a6 cb 00 48 8b 15 fb a6 cb 00 49
RSP: 002b:00007ffe96b3b618 EFLAGS: 00000246
RAX: 0000000083f0b6f4 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000083f0b6f4 RSI: 00000000000016f4 RDI: ffffffff83f0b6f4
RBP: 00007fc4483fd008 R08: 0000001b33120000 R09: 0000000000000000
R10: 0000000083f0b6f4 R11: 0000000083f0b6f8 R12: 00000000000004e5
R13: ffffffff83f0bd72 R14: ffffffff83f0b6f4 R15: 00007fc448db40e8
----------------
Code disassembly (best guess):
0: b1 bc mov $0xbc,%cl
2: f5 cmc
3: ff 90 53 48 89 fb call *-0x476b7ad(%rax)
9: 48 83 c7 18 add $0x18,%rdi
d: 48 8b 74 24 08 mov 0x8(%rsp),%rsi
12: e8 7e 2f d5 f6 call 0xf6d52f95
17: 48 89 df mov %rbx,%rdi
1a: e8 e6 6c d6 f6 call 0xf6d66d05
1f: e8 01 f9 fb f6 call 0xf6fbf925
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 56 05 c9 f6 call 0xf6c90585 <-- trapping instruction
2f: 65 8b 05 47 12 6d 75 mov %gs:0x756d1247(%rip),%eax # 0x756d127d
36: 85 c0 test %eax,%eax
38: 74 02 je 0x3c
3a: 5b pop %rbx
3b: c3 ret
3c: e8 .byte 0xe8
3d: f4 hlt
3e: 35 .byte 0x35
3f: 6b .byte 0x6b