rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (10500 ticks this GP) idle=51b4/1/0x4000000000000000 softirq=13100/13100 fqs=5246
rcu: hardirqs softirqs csw/system
rcu: number: 1358810 0 0
rcu: cputime: 16720 35779 62 ==> 52510(ms)
rcu: (t=10502 jiffies g=13745 q=1748 ncpus=2)
CPU: 1 PID: 6287 Comm: syz.3.117 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__should_failslab+0x0/0xf0 mm/failslab.c:18
Code: ff e9 03 fd ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 0b fd ff ff 48 89 df e8 2c 78 ff ff e9 fe fc ff ff cc cc cc cc cc cc cc <66> 0f 1f 00 41 57 41 56 41 54 53 89 f3 49 89 fe 49 bc 00 00 00 00
RSP: 0018:ffffc900001f0458 EFLAGS: 00000246
RAX: 0000000000400140 RBX: ffffc900001f04c0 RCX: dffffc0000000000
RDX: ffffc900001f04c0 RSI: 0000000000002920 RDI: ffff888017c41500
RBP: 0000000000002920 R08: 0000000000002920 R09: 1ffff11005fe90b6
R10: dffffc0000000000 R11: ffffed1005fe90b7 R12: 0000000000000000
R13: 00000000ffffffff R14: ffff888017c41500 R15: 0000000000000001
FS: 00007f4a47bb46c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000005f6ce000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
should_failslab+0x9/0x20 mm/slab_common.c:1500
slab_pre_alloc_hook+0x59/0x300 mm/slab.h:716
slab_alloc_node mm/slub.c:3477 [inline]
__kmem_cache_alloc_node+0x53/0x250 mm/slub.c:3534
kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1098
kmalloc include/linux/slab.h:600 [inline]
kzalloc include/linux/slab.h:721 [inline]
ref_tracker_alloc+0x163/0x4b0 lib/ref_tracker.c:203
__netdev_tracker_alloc include/linux/netdevice.h:4112 [inline]
netdev_hold include/linux/netdevice.h:4141 [inline]
___neigh_create+0xca4/0x23d0 net/core/neighbour.c:658
ip6_finish_output2+0x156d/0x1620 net/ipv6/ip6_output.c:132
dst_output include/net/dst.h:467 [inline]
NF_HOOK include/linux/netfilter.h:304 [inline]
ndisc_send_skb+0xbb9/0x1480 net/ipv6/ndisc.c:513
addrconf_rs_timer+0x36b/0x640 net/ipv6/addrconf.c:4036
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
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:5256
Code: 31 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 23 f7 3a 09 e8 be 19 30 00 fb 4c 8b 65 b8 <49> 8d bc 24 00 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0
RSP: 0018:ffffc9000c4a7760 EFLAGS: 00000286
RAX: f2329b677c672400 RBX: 0000000000000000 RCX: f2329b677c672400
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: ffffffff8b1d32e0
RBP: ffffc9000c4a77b0 R08: ffffffff911ed5ff R09: 1ffffffff223dabf
R10: dffffc0000000000 R11: fffffbfff223dac0 R12: ffff88807e219e00
R13: 1ffff110171e79a9 R14: dffffc0000000000 R15: ffff8880b8f3cd48
context_switch kernel/sched/core.c:5385 [inline]
__schedule+0x15b6/0x4660 kernel/sched/core.c:6701
preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6868
preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6892
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:2950
__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: 0033:0x7f4a46d9e0d9
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:00007f4a47bb4028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f4a47025fa0 RCX: 00007f4a46d9e0d9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007f4a46e35024 R08: 000000000000000a R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4a47026038 R14: 00007f4a47025fa0 R15: 00007ffdbf694fa8