rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (9612 ticks this GP) idle=a244/1/0x4000000000000000 softirq=30963/30963 fqs=4760
rcu: hardirqs softirqs csw/system
rcu: number: 2427097 0 0
rcu: cputime: 15454 37025 47 ==> 52480(ms)
rcu: (t=10500 jiffies g=35069 q=454 ncpus=2)
CPU: 1 PID: 10754 Comm: syz.4.1377 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:unwind_next_frame+0x1789/0x2970 arch/x86/kernel/unwind_orc.c:648
Code: 48 c1 e8 03 42 0f b6 04 28 84 c0 48 8b 74 24 08 0f 85 e0 10 00 00 49 0f bf 06 48 01 c6 49 8d 54 24 40 4c 89 e7 e8 a7 14 00 00 <84> c0 0f 84 9c 01 00 00 e8 3a dc 4b 00 e9 7f 04 00 00 4d 8d 74 24
RSP: 0018:ffffc900001f05b8 EFLAGS: 00000292
RAX: 1ffff9200003e001 RBX: ffffffff8f1a252b RCX: ffff88802b679e00
RDX: 0000000000000100 RSI: 0000000000000002 RDI: ffffc900001f0ad8
RBP: ffffc900001f06d8 R08: ffff88802b679e00 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000100 R12: ffffc900001f0688
R13: dffffc0000000000 R14: ffffffff8f1a252a R15: ffffffff8f1a252c
FS: 00007f9f78bf66c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000005b5b1000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000000000000000 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]
kmem_cache_alloc_node+0x14c/0x320 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]
wg_packet_send_keepalive+0x65/0x2b0 drivers/net/wireguard/send.c:226
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:preempt_schedule_irq+0xba/0x150 kernel/sched/core.c:7010
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 6f bf 01 00 00 00 e8 a1 ea cb f6 e8 4c fd fc f6 fb bf 01 00 00 00 f1 b4 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc9000463fda0 EFLAGS: 00000286
RAX: c42e42ea10b53700 RBX: 0000000000000000 RCX: c42e42ea10b53700
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: 0000000000000001
RBP: ffffc9000463fe40 R08: ffffffff8e8b666f R09: 1ffffffff1d16ccd
R10: dffffc0000000000 R11: fffffbfff1d16cce R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920008c7fb4
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__syscall_enter_from_user_work kernel/entry/common.c:97 [inline]
RIP: 0010:syscall_enter_from_user_mode+0x2e/0x80 kernel/entry/common.c:118
Code: 41 56 53 48 89 f3 49 89 fe 48 8b 7c 24 10 e8 e9 fa ff ff 66 90 66 90 e8 e0 3c 05 f7 e8 9b 3c 05 f7 fb 65 48 8b 05 12 54 7b 75 <48> 8b 70 08 40 f6 c6 3f 74 0b 4c 89 f7 5b 41 5e e9 5d 77 eb f6 48
RSP: 0018:ffffc9000463ff08 EFLAGS: 00000286
RAX: ffff88802b679e00 RBX: 0000000000000141 RCX: c42e42ea10b53700
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: ffffffff8b1c9c20
RBP: ffffc9000463ff48 R08: ffffffff8e8b666f R09: 1ffffffff1d16ccd
R10: dffffc0000000000 R11: fffffbfff1d16cce R12: 0000000000000000
R13: 0000000000000000 R14: ffffc9000463ff58 R15: 0000000000000000
do_syscall_64+0x28/0xb0 arch/x86/entry/common.c:72
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f9f7a99ce59
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:00007f9f78bf6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f9f7ac15fa0 RCX: 00007f9f7a99ce59
RDX: 0000000000000094 RSI: 00002000000000c0 RDI: 0000000000000005
RBP: 00007f9f7aa32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9f7ac16038 R14: 00007f9f7ac15fa0 R15: 00007ffd150292c8