rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (1 GPs behind) idle=ec54/1/0x4000000000000000 softirq=12870/12874 fqs=5248
rcu: hardirqs softirqs csw/system
rcu: number: 1290956 0 0
rcu: cputime: 18885 33614 38 ==> 52520(ms)
rcu: (t=10503 jiffies g=12489 q=1492 ncpus=2)
CPU: 1 PID: 5967 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:should_failslab+0x0/0x20 mm/slab_common.c:1500
Code: 1a 00 84 c0 74 0f 48 89 df e8 2c 6d 1a 00 48 85 c0 74 06 5b c3 31 c0 5b c3 48 89 df 5b e9 e8 f5 ff ff 0f 1f 84 00 00 00 00 00 <66> 0f 1f 00 e8 67 b6 1a 00 31 c9 84 c0 b8 f4 ff ff ff 0f 44 c1 c3
RSP: 0018:ffffc900001f0950 EFLAGS: 00000246
RAX: 0000000000400140 RBX: ffffc900001f09b8 RCX: dffffc0000000000
RDX: ffffc900001f09b8 RSI: 0000000000000820 RDI: ffff888142e68640
RBP: 0000000000000820 R08: 0000000000000820 R09: 1ffff1100bc50704
R10: dffffc0000000000 R11: ffffed100bc50705 R12: 0000000000000000
R13: 00000000000000f0 R14: ffff888142e68640 R15: 0000000000000001
FS: 00005555877bd500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2da63fff CR3: 00000000751d3000 CR4: 00000000003506e0
Call Trace:
slab_pre_alloc_hook+0x59/0x310 mm/slab.h:716
slab_alloc_node mm/slub.c:3477 [inline]
kmem_cache_alloc_node+0x60/0x330 mm/slub.c:3540
__alloc_skb+0x108/0x2c0 net/core/skbuff.c:643
alloc_skb include/linux/skbuff.h:1284 [inline]
ndisc_alloc_skb+0xa6/0x450 net/ipv6/ndisc.c:423
ndisc_send_rs+0x2a6/0x610 net/ipv6/ndisc.c:707
addrconf_rs_timer+0x2bc/0x600 net/ipv6/addrconf.c:4006
call_timer_fn+0x16e/0x530 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x52d/0x7d0 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+0xc7/0x190 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:generic_exec_single+0x476/0x4f0 kernel/smp.c:418
Code: 75 11 e8 cd e6 0a 00 48 85 db 75 16 e8 c3 e6 0a 00 eb 15 e8 bc e6 0a 00 e8 47 cd ec 08 48 85 db 74 ea e8 ad e6 0a 00 fb 31 c0 <48> c7 44 24 20 0e 36 e0 45 4b c7 04 2c 00 00 00 00 66 43 c7 44 2c
RSP: 0018:ffffc9000423fa00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffff88802b991e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000423fad0 R08: ffffffff90d9460f R09: 1ffffffff21b28c1
R10: dffffc0000000000 R11: fffffbfff21b28c2 R12: 1ffff92000847f44
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92000847f65
smp_call_function_single+0x352/0x580 kernel/smp.c:647
task_function_call kernel/events/core.c:120 [inline]
perf_install_in_context+0x591/0x8e0 kernel/events/core.c:2948
__do_sys_perf_event_open kernel/events/core.c:12915 [inline]
__se_sys_perf_event_open+0x17fa/0x1c20 kernel/events/core.c:12567
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f13fbf8f749
Code: 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 01 48
RSP: 002b:00007ffde42937b8 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f13fc1e5fa0 RCX: 00007f13fbf8f749
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f13fc013f91 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f13fc1e5fa0 R14: 00007f13fc1e5fa0 R15: 0000000000000005