rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10492 ticks this GP) idle=04d4/1/0x4000000000000000 softirq=22585/22585 fqs=5249
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1387856          0            0
rcu: 	cputime:    16113      36376           64   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=28261 q=498 ncpus=2)
CPU: 1 PID: 8006 Comm: syz.1.739 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:stack_trace_save+0x5/0x100 kernel/stacktrace.c:114
Code: 89 e0 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 45 31 e4 eb e7 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 55 <48> 89 e5 41 56 53 48 83 e4 e0 48 81 ec 80 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc900001f0690 EFLAGS: 00000246
RAX: ffffc900001f06a0 RBX: 0000000000082820 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000040 RDI: ffffc900001f06a0
RBP: ffffc900001f08d0 R08: ffffc900001f0988 R09: 0000000000000000
R10: ffffc900001f06a0 R11: fffffbfff223ceba R12: 0000000000000001
R13: 00000000000002c0 R14: ffff88803009c2c0 R15: ffffc900001f06a0
FS:  00007fe1d36516c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c277b22 CR3: 0000000024f2f000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 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+0x6a/0x4d0 mm/slab.h:767
 slab_alloc_node mm/slub.c:3495 [inline]
 kmem_cache_alloc_node+0x1af/0x310 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+0x570/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x27d/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+0x267/0x8f0 kernel/sched/core.c:5255
Code: 2e 09 85 c0 0f 84 30 01 00 00 48 85 db 0f 85 4f 01 00 00 0f 1f 44 00 00 4c 89 e7 e8 43 32 38 09 e8 8e 0a 30 00 fb 4c 8b 65 b8 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0
RSP: 0018:ffffc9000c887760 EFLAGS: 00000286
RAX: 08b1e5f8e9052500 RBX: 0000000000000000 RCX: 08b1e5f8e9052500
RDX: dffffc0000000000 RSI: ffffffff8acacb60 RDI: ffffffff8b1cfa20
RBP: ffffc9000c8877b0 R08: ffffffff911e75ff R09: 1ffffffff223cebf
R10: dffffc0000000000 R11: fffffbfff223cec0 R12: ffff888028c09e00
R13: 1ffff110171e79a9 R14: dffffc0000000000 R15: ffff8880b8f3cd48
 context_switch kernel/sched/core.c:5384 [inline]
 __schedule+0x15b6/0x4660 kernel/sched/core.c:6700
 preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867
 preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6891
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
 smp_call_function_single+0x48d/0x5a0 kernel/smp.c:652
 task_function_call kernel/events/core.c:120 [inline]
 perf_install_in_context+0x5bb/0x920 kernel/events/core.c:2951
 __do_sys_perf_event_open kernel/events/core.c:12949 [inline]
 __se_sys_perf_event_open+0x1841/0x1c60 kernel/events/core.c:12601
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe1d279de59
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:00007fe1d3651028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fe1d2a25fa0 RCX: 00007fe1d279de59
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007fe1d2833e6f R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe1d2a26038 R14: 00007fe1d2a25fa0 R15: 00007ffc5c4fb398
 </TASK>