rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (1 GPs behind) idle=0ae4/1/0x4000000000000000 softirq=72646/72647 fqs=5245
rcu: hardirqs softirqs csw/system
rcu: number: 1327655 0 0
rcu: cputime: 16875 35614 66 ==> 52500(ms)
rcu: (t=10502 jiffies g=106161 q=2180 ncpus=2)
CPU: 0 PID: 18983 Comm: syz.2.4719 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:get_current arch/x86/include/asm/current.h:41 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x60 kernel/kcov.c:215
Code: 00 00 f3 0f 1e fa 53 48 89 fb e8 13 00 00 00 48 8b 3d 4c 07 05 0d 48 89 de 5b e9 73 b2 57 00 cc cc cc f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d 10 46 7c 7e 65 8b 15 11 46 7c 7e 81 e2 00 01 ff 00 74
RSP: 0018:ffffc90000007440 EFLAGS: 00000246
RAX: ffffffff813bd989 RBX: ffffc90000007c98 RCX: ffff888064f25a00
RDX: 0000000000000100 RSI: 0000000000000002 RDI: ffffc90000007c98
RBP: ffffc90000007578 R08: ffff888064f25a00 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000100 R12: ffffc90000007ba0
R13: ffffc90000007528 R14: ffffc90000007538 R15: dffffc0000000000
FS: 00007f29e23f66c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 00000000246e7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000b6e DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
__read_once_word_nocheck+0x9/0x10 include/asm-generic/rwonce.h:66
deref_stack_reg arch/x86/kernel/unwind_orc.c:406 [inline]
unwind_next_frame+0x15d9/0x2990 arch/x86/kernel/unwind_orc.c:585
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
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+0x6a/0x4d0 mm/slab.h:770
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]
ndisc_alloc_skb+0xa6/0x450 net/ipv6/ndisc.c:423
ndisc_send_rs+0x27d/0x690 net/ipv6/ndisc.c:707
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:ffffc9000432f880 EFLAGS: 00000282
RAX: 136de10b7128eb00 RBX: 0000000000000000 RCX: 136de10b7128eb00
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: ffffffff8b1d32e0
RBP: ffffc9000432f8d0 R08: ffffffff8e8c772f R09: 1ffffffff1d18ee5
R10: dffffc0000000000 R11: fffffbfff1d18ee6 R12: ffff888064f25a00
R13: 1ffff110171c79a9 R14: dffffc0000000000 R15: ffff8880b8e3cd48
context_switch kernel/sched/core.c:5385 [inline]
__schedule+0x15b6/0x4660 kernel/sched/core.c:6701
schedule+0xbd/0x170 kernel/sched/core.c:6775
futex_wait_queue+0x138/0x1b0 kernel/futex/waitwake.c:355
futex_wait+0x1e9/0x5c0 kernel/futex/waitwake.c:656
do_futex+0x2ff/0x3e0 kernel/futex/syscalls.c:134
__do_sys_futex kernel/futex/syscalls.c:211 [inline]
__se_sys_futex+0x3a9/0x440 kernel/futex/syscalls.c:192
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: 0033:0x7f29e159e0d9
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:00007f29e23f60e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f29e1825fa8 RCX: 00007f29e159e0d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f29e1825fa8
RBP: 00007f29e1825fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f29e1826038 R14: 00007fff7eacb240 R15: 00007fff7eacb328