syzbot

rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=f68c/1/0x4000000000000000 softirq=30771/30772 fqs=4292
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1300742          0            0
rcu: 	cputime:    18423      34056           67   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=38853 q=2341 ncpus=2)
CPU: 0 PID: 9818 Comm: syz.1.1413 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:perf_trace_lock_acquire+0x123/0x410 include/trace/events/lock.h:24
Code: 03 78 00 4c 8b 2b e8 ec 39 1f 09 89 c3 83 f8 08 0f 83 8c 02 00 00 48 8d 1c dd 30 7a a7 8c 48 89 d8 48 c1 e8 03 42 80 3c 30 00 <74> 08 48 89 df e8 23 03 78 00 4c 03 2b 4c 89 6c 24 10 49 8d 5f 70
RSP: 0018:ffffc900000072a0 EFLAGS: 00000246
RAX: 1ffffffff194ef46 RBX: ffffffff8ca77a30 RCX: 862db135000d8f00
RDX: 0000000000000000 RSI: ffffffff8b1c8fc0 RDI: ffffffff8b1c8f80
RBP: ffffc900000073a0 R08: 0000000000000002 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1d1633e R12: 1ffff92000000e5c
R13: 0000607f46e33538 R14: dffffc0000000000 R15: ffffffff8cffd280
FS:  00007f487ea3b6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6a2a7456b8 CR3: 000000001db82000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 trace_lock_acquire include/trace/events/lock.h:24 [inline]
 lock_acquire+0x3ef/0x420 kernel/locking/lockdep.c:5725
 rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
 rcu_read_lock include/linux/rcupdate.h:786 [inline]
 is_bpf_text_address+0x47/0x2a0 kernel/bpf/core.c:741
 kernel_text_address+0xa0/0xd0 kernel/extable.c:125
 __kernel_text_address+0xd/0x30 kernel/extable.c:79
 unwind_get_return_address+0x5d/0xc0 arch/x86/kernel/unwind_orc.c:369
 arch_stack_walk+0x11d/0x190 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook+0x6e/0x4b0 mm/slab.h:767
 slab_alloc_node mm/slub.c:3495 [inline]
 kmem_cache_alloc_node+0x14c/0x320 mm/slub.c:3540
 kmalloc_reserve+0x95/0x240 net/core/skbuff.c:562
 __alloc_skb+0x138/0x2c0 net/core/skbuff.c:653
 alloc_skb include/linux/skbuff.h:1316 [inline]
 new_skb drivers/block/aoe/aoecmd.c:66 [inline]
 aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:430 [inline]
 aoecmd_cfg+0x2c5/0xa50 drivers/block/aoe/aoecmd.c:1374
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x542/0x800 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:finish_task_switch+0x26a/0x8f0 kernel/sched/core.c:5255
Code: 0f 84 33 01 00 00 48 85 db 0f 85 52 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 00 b9 32 09 e8 9b 29 30 00 fb 4c 8b 65 c0 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc9000355f958 EFLAGS: 00000282
RAX: 862db135000d8f00 RBX: 0000000000000000 RCX: 862db135000d8f00
RDX: dffffc0000000000 RSI: ffffffff8acac9e0 RDI: ffffffff8b1c8fe0
RBP: ffffc9000355f9b0 R08: ffffffff911c6547 R09: 1ffffffff2238ca8
R10: dffffc0000000000 R11: fffffbfff2238ca9 R12: ffff88807b690000
R13: dffffc0000000000 R14: ffff88807cf43c00 R15: ffff8880b8e3cac8
 context_switch kernel/sched/core.c:5384 [inline]
 __schedule+0x155b/0x45a0 kernel/sched/core.c:6700
 preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7010
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:692
RIP: 0010:__list_add include/linux/list.h:156 [inline]
RIP: 0010:list_add_tail include/linux/list.h:183 [inline]
RIP: 0010:__do_sys_perf_event_open kernel/events/core.c:12968 [inline]
RIP: 0010:__se_sys_perf_event_open+0x19a7/0x1c50 kernel/events/core.c:12609
Code: e8 4e 2d 30 00 4c 89 33 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 f7 e8 2c 2d 30 00 4d 89 26 <eb> 05 e8 52 f5 d7 ff 48 8b 7c 24 18 e8 38 e3 df 08 8b 5c 24 78 89
RSP: 0018:ffffc9000355fd40 EFLAGS: 00000246
RAX: 1ffff110036ce984 RBX: ffff88801b675e70 RCX: dffffc0000000000
RDX: ffffc9000d67c000 RSI: 0000000000006f70 RDI: 0000000000006f71
RBP: ffffc9000355ff10 R08: ffffffff8e8b19ef R09: 1ffffffff1d1633d
R10: dffffc0000000000 R11: fffffbfff1d1633e R12: ffff88801b675e68
R13: 1ffff920006abfb8 R14: ffff88801b674c20 R15: ffff88807b6914c0
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f487db9cdd9
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:00007f487ea3b028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f487de15fa0 RCX: 00007f487db9cdd9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f487dc32d69 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f487de16038 R14: 00007f487de15fa0 R15: 00007ffc1897df58
 </TASK>