rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (10499 ticks this GP) idle=afec/1/0x4000000000000000 softirq=108325/108325 fqs=5201
rcu: hardirqs softirqs csw/system
rcu: number: 1375475 0 0
rcu: cputime: 28849 23630 36 ==> 52510(ms)
rcu: (t=10503 jiffies g=140389 q=527 ncpus=2)
CPU: 1 PID: 26044 Comm: syz.2.5294 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:unwind_next_frame+0xe21/0x2970 arch/x86/kernel/unwind_orc.c:581
Code: 48 89 c2 48 89 54 24 08 49 8d 5f 01 48 8b 44 24 48 42 0f b6 04 28 84 c0 0f 85 d2 15 00 00 48 89 d8 48 c1 e8 03 48 89 44 24 28 <42> 0f b6 04 28 84 c0 0f 85 d9 15 00 00 45 0f b6 77 01 41 83 e6 07
RSP: 0018:ffffc900001f0338 EFLAGS: 00000a06
RAX: 1ffffffff1f2a617 RBX: ffffffff8f9530b9 RCX: ffff888018755a00
RDX: ffffc900001f0900 RSI: ffffffff8cfa0760 RDI: 0000000000000005
RBP: ffffc900001f0458 R08: ffff888018755a00 R09: 0000000000000008
R10: 0000000000000009 R11: 0000000000000100 R12: ffffc900001f0408
R13: dffffc0000000000 R14: ffffffff8f9530b5 R15: ffffffff8f9530b8
FS: 00007f777789e6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 0000000048f0f000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
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+0x6e/0x4b0 mm/slab.h:767
slab_alloc_node mm/slub.c:3495 [inline]
slab_alloc mm/slub.c:3503 [inline]
__kmem_cache_alloc_lru mm/slub.c:3510 [inline]
kmem_cache_alloc+0x11a/0x2d0 mm/slub.c:3519
dst_alloc+0x105/0x170 net/core/dst.c:89
ip6_dst_alloc net/ipv6/route.c:344 [inline]
icmp6_dst_alloc+0x7b/0x400 net/ipv6/route.c:3316
ndisc_send_skb+0x44e/0x14f0 net/ipv6/ndisc.c:493
addrconf_rs_timer+0x2d5/0x630 net/ipv6/addrconf.c:4024
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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:check_kcov_mode kernel/kcov.c:193 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x36/0x60 kernel/kcov.c:216
Code: 50 99 7c 7e 65 8b 15 51 99 7c 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 <83> fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 8b 89 fc
RSP: 0018:ffffc9000f0b7a68 EFLAGS: 00000246
RAX: ffffffff8a7460cf RBX: ffffc90000a2b3c8 RCX: ffff888018755a00
RDX: 0000000000000002 RSI: ffffc90000a2b3c8 RDI: ffffc9000f0b7c68
RBP: 1ffff92000145679 R08: ffff888018755a1b R09: 1ffff110030eab43
R10: dffffc0000000000 R11: ffffed10030eab44 R12: 1ffff9200014567a
R13: ffffc90000a2b3c8 R14: ffffc90000a2b3c8 R15: ffffc90000a2b3d0
__list_add include/linux/list.h:153 [inline]
list_add_tail include/linux/list.h:183 [inline]
plist_add+0x30f/0x490 lib/plist.c:101
__futex_queue+0xe9/0x150 kernel/futex/core.c:568
futex_queue kernel/futex/futex.h:173 [inline]
futex_wait_queue+0x91/0x1b0 kernel/futex/waitwake.c:338
futex_wait+0x1ec/0x5e0 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+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f777699c799
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:00007f777789e0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f7776c15fa8 RCX: 00007f777699c799
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f7776c15fa8
RBP: 00007f7776c15fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7776c16038 R14: 00007ffc8762e710 R15: 00007ffc8762e7f8