rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (1 GPs behind) idle=9584/1/0x4000000000000000 softirq=19864/19865 fqs=5248
rcu: hardirqs softirqs csw/system
rcu: number: 1534762 0 0
rcu: cputime: 15179 37310 41 ==> 52500(ms)
rcu: (t=10502 jiffies g=21541 q=952 ncpus=2)
CPU: 1 PID: 7777 Comm: syz.2.508 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_cmp8+0x2e/0x80 kernel/kcov.c:293
Code: 48 8b 04 24 65 48 8b 0d a0 91 7c 7e 65 8b 15 a1 91 7c 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 57 83 b9 1c 16 00 00 00 <74> 4e 8b 91 f8 15 00 00 83 fa 03 75 43 48 8b 91 00 16 00 00 44 8b
RSP: 0018:ffffc900001f0548 EFLAGS: 00000246
RAX: ffffffff813b3c78 RBX: ffffffff8e9a4924 RCX: ffff888018b55a00
RDX: 0000000000000100 RSI: ffffffff8132a3c7 RDI: ffffffff8132a2d8
RBP: ffffffff8e9a4924 R08: ffff888018b55a00 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000100 R12: ffffffff8e9a4924
R13: ffffffff8132a2d8 R14: ffffffff8132a3c7 R15: ffffffff8e9a4924
FS: 00007f544dce76c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000cf3d CR3: 0000000065ea0000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
__orc_find arch/x86/kernel/unwind_orc.c:102 [inline]
orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
unwind_next_frame+0x4b8/0x2970 arch/x86/kernel/unwind_orc.c:494
__unwind_start+0x66a/0x7e0 arch/x86/kernel/unwind_orc.c:760
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xf8/0x190 arch/x86/kernel/stacktrace.c:24
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 51 e6 cd f6 e8 7c f3 fe 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:ffffc90014c665a0 EFLAGS: 00000286
RAX: d815ce2fbde00300 RBX: 0000000000000000 RCX: d815ce2fbde00300
RDX: dffffc0000000000 RSI: ffffffff8acac9e0 RDI: 0000000000000001
RBP: ffffc90014c66650 R08: ffffffff911c5537 R09: 1ffffffff2238aa6
R10: dffffc0000000000 R11: fffffbfff2238aa7 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200298ccb4
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:memset_orig+0x52/0xac arch/x86/lib/memset_64.S:75
Code: 06 74 35 0f 1f 44 00 00 48 ff c9 48 89 07 48 89 47 08 48 89 47 10 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 <48> 8d 7f 40 75 d8 0f 1f 84 00 00 00 00 00 89 d1 83 e1 38 74 14 c1
RSP: 0018:ffffc90014c66718 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90014c66760 RCX: 0000000000000000
RDX: 0000000000000080 RSI: 0000000000000000 RDI: ffffc90014c667a0
RBP: ffffc90014c66860 R08: ffffc90014c667df R09: 0000000000000000
R10: ffffc90014c66760 R11: fffff5200298ccfc R12: dffffc0000000000
R13: 0000000000000001 R14: ffffea000137ce80 R15: 1ffff9200298cce8
save_stack+0xb3/0x230 mm/page_owner.c:112
__set_page_owner+0x1d/0x60 mm/page_owner.c:192
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581
prep_new_page mm/page_alloc.c:1588 [inline]
get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220
__alloc_pages+0x1f0/0x460 mm/page_alloc.c:4500
__folio_alloc+0x10/0x20 mm/page_alloc.c:4532
vma_alloc_folio+0x47a/0x8f0 mm/mempolicy.c:2240
do_anonymous_page mm/memory.c:4150 [inline]
do_pte_missing mm/memory.c:3687 [inline]
handle_pte_fault mm/memory.c:5047 [inline]
__handle_mm_fault mm/memory.c:5188 [inline]
handle_mm_fault+0x1b3b/0x4c00 mm/memory.c:5353
do_user_addr_fault+0x730/0x12c0 arch/x86/mm/fault.c:1371
handle_page_fault arch/x86/mm/fault.c:1463 [inline]
exc_page_fault+0x64/0x100 arch/x86/mm/fault.c:1516
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0010:rep_movs_alternative+0x15/0x90 arch/x86/lib/copy_user_64.S:44
Code: 8b 1c 24 4c 8b 64 24 08 48 83 c4 10 c3 cc cc cc cc cc cc cc cc f3 0f 1e fa 48 83 f9 40 73 40 83 f9 08 73 21 85 c9 74 0f 8a 06 <88> 07 48 ff c7 48 ff c6 48 ff c9 75 f1 c3 66 2e 0f 1f 84 00 00 00
RSP: 0018:ffffc90014c66f50 EFLAGS: 00050206
RAX: ffffffff842a2230 RBX: 0000000000000003 RCX: 0000000000000003
RDX: 0000000000000000 RSI: ffff88807d89c68c RDI: 000020000000cf3d
RBP: 0000000000000003 R08: ffff88807d89c68e R09: 1ffff1100fb138d1
R10: dffffc0000000000 R11: ffffed100fb138d2 R12: 000020000000cf40
R13: 0000000000000000 R14: 000020000000cf3d R15: ffff88807d89c68c
copy_user_generic arch/x86/include/asm/uaccess_64.h:112 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:133 [inline]
_copy_to_user+0x85/0xa0 lib/usercopy.c:41
copy_to_user include/linux/uaccess.h:191 [inline]
bpf_verifier_vlog+0x2fa/0x870 kernel/bpf/log.c:124
verbose+0x11e/0x1a0 kernel/bpf/verifier.c:370
print_insn_state+0x130/0x160 kernel/bpf/verifier.c:1548
do_check+0x4fd1/0xdbf0 kernel/bpf/verifier.c:17139
do_check_common+0xadb/0x13e0 kernel/bpf/verifier.c:19712
do_check_main kernel/bpf/verifier.c:19775 [inline]
bpf_check+0x658e/0xeba0 kernel/bpf/verifier.c:20443
bpf_prog_load+0x1163/0x1670 kernel/bpf/syscall.c:2753
__sys_bpf+0x5ba/0x890 kernel/bpf/syscall.c:5477
__do_sys_bpf kernel/bpf/syscall.c:5581 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5579 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5579
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: 0033:0x7f544cd9c819
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:00007f544dce7028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f544d015fa0 RCX: 00007f544cd9c819
RDX: 0000000000000048 RSI: 000020000000e000 RDI: 0000000000000005
RBP: 00007f544ce32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f544d016038 R14: 00007f544d015fa0 R15: 00007ffc856890b8