rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=54dc/1/0x4000000000000000 softirq=7518/7518 fqs=3
rcu: (detected by 0, t=10502 jiffies, g=9085, q=251 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5144 Comm: kworker/1:3 Not tainted 6.7.0-syzkaller-11705-gb0d326da462e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: ipv6_addrconf addrconf_dad_work
RIP: 0010:__lock_acquire+0x167/0x3b30 kernel/locking/lockdep.c:5034
Code: df 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 0d 13 00 00 48 8b 04 24 48 c7 c2 a0 a6 a2 92 48 c1 ea 03 8b 80 b8 0a 00 00 <89> 44 24 10 48 b8 00 00 00 00 00 fc ff df 0f b6 14 02 48 c7 c0 a0
RSP: 0018:ffffc900001f0bf0 EFLAGS: 00000806
RAX: 0000000000000004 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 1ffffffff25454d4 RSI: ffff88802888d940 RDI: ffff8880b992bae0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8f3a87d7 R11: 0000000000000004 R12: 0000000000000000
R13: ffff8880b992bad8 R14: 0000000000000000 R15: ffffffff92151630
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe6fee0ff8 CR3: 000000000cf78000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170
__run_hrtimer kernel/time/hrtimer.c:1692 [inline]
__hrtimer_run_queues+0x2bd/0xc20 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
__sysvec_apic_timer_interrupt+0x105/0x400 arch/x86/kernel/apic/apic.c:1082
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:write_comp_data+0x12/0x80 kernel/kcov.c:236
Code: 04 25 80 c2 03 00 48 8b 80 f0 15 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 49 89 d2 49 89 f8 49 89 f1 65 48 8b 14 25 80 c2 03 00 <65> 8b 05 cf a6 7b 7e a9 00 01 ff 00 74 0f f6 c4 01 74 59 8b 82 fc
RSP: 0018:ffffc9000464f338 EFLAGS: 00000246
RAX: ffffffff893fcb66 RBX: ffffffff893fcb66 RCX: ffffffff81320f4b
RDX: ffff88802888d940 RSI: 0000000000000000 RDI: 0000000000000007
RBP: ffffc9000464f3d8 R08: 0000000000000007 R09: 0000000000000000
R10: ffffffff893fcb66 R11: 0000000000000004 R12: ffffc9000464f348
R13: ffffffff81757170 R14: ffffc9000464f408 R15: ffff88802888d940
arch_stack_walk+0xcb/0x170 arch/x86/kernel/stacktrace.c:27
stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:314 [inline]
__kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:340
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3813 [inline]
slab_alloc_node mm/slub.c:3860 [inline]
kmem_cache_alloc+0x136/0x320 mm/slub.c:3867
kmem_cache_zalloc include/linux/slab.h:701 [inline]
node_alloc net/ipv6/ip6_fib.c:186 [inline]
fib6_add_1+0x36d/0x17d0 net/ipv6/ip6_fib.c:880
fib6_add+0x1e7/0x4440 net/ipv6/ip6_fib.c:1392
__ip6_ins_rt net/ipv6/route.c:1303 [inline]
ip6_ins_rt+0xb6/0x110 net/ipv6/route.c:1313
__ipv6_ifa_notify+0xcb1/0x10a0 net/ipv6/addrconf.c:6205
ipv6_ifa_notify net/ipv6/addrconf.c:6244 [inline]
addrconf_dad_completed+0x19d/0x1030 net/ipv6/addrconf.c:4255
addrconf_dad_work+0x7f6/0x14b0 net/ipv6/addrconf.c:4203
process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2706 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
rcu: rcu_preempt kthread starved for 10496 jiffies! g9085 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:28080 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf12/0x5c00 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6817
schedule_timeout+0x137/0x290 kernel/time/timer.c:2183
rcu_gp_fqs_loop+0x1ec/0xb10 kernel/rcu/tree.c:1631
rcu_gp_kthread+0x24b/0x380 kernel/rcu/tree.c:1830
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 2437 Comm: kworker/u4:8 Not tainted 6.7.0-syzkaller-11705-gb0d326da462e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline]
RIP: 0010:smp_call_function_many_cond+0x4e4/0x1550 kernel/smp.c:855
Code: 0b 00 85 ed 74 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 f4 4c 89 f5 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 7e c5 0b 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 24 0e 00 00 8b 43 08 31
RSP: 0018:ffffc90009dcf930 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b9942020 RCX: ffffffff817c5c18
RDX: ffff888028f1d940 RSI: ffffffff817c5bf2 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000006 R12: ffffed1017328405
R13: 0000000000000001 R14: ffff8880b9942028 R15: ffff8880b983de80
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcb52ea2430 CR3: 000000000cf78000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1023
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2087 [inline]
text_poke_bp_batch+0x22b/0x750 arch/x86/kernel/alternative.c:2297
text_poke_flush arch/x86/kernel/alternative.c:2488 [inline]
text_poke_flush arch/x86/kernel/alternative.c:2485 [inline]
text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2495
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x1d7/0x400 kernel/jump_label.c:829
static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:205
static_key_enable+0x1a/0x20 kernel/jump_label.c:218
toggle_allocation_gate mm/kfence/core.c:826 [inline]
toggle_allocation_gate+0xf4/0x250 mm/kfence/core.c:818
process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2706 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242