rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P19745/1:b..l
rcu: (detected by 1, t=10505 jiffies, g=94985, q=1396 ncpus=2)
task:syz.1.3320 state:R running task stack:26520 pid:19745 tgid:19744 ppid:5639 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x17b4/0x5680 kernel/sched/core.c:7188
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7512
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x14f/0x730 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5872
Code: ff ff ff e8 e1 14 06 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 cb 2f 97 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 9b a0 6e ff cc 48 8d 3d 98 4c 92
RSP: 0018:ffffc900055fef38 EFLAGS: 00000282
RAX: 6aad1786bec8d800 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 000000005a44979c RSI: ffffffff8e217007 RDI: ffffffff8c28aa60
RBP: ffffffff8176e256 R08: ffffffff8176e256 R09: ffffffff8e95cd60
R10: dffffc0000000000 R11: ffffffff81b0d880 R12: 0000000000000002
R13: ffffffff8e95cd60 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:838 [inline]
class_rcu_constructor include/linux/rcupdate.h:1181 [inline]
unwind_next_frame+0xc3/0x2550 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
kasan_kmalloc include/linux/kasan.h:263 [inline]
__kmalloc_cache_noprof+0x31c/0x660 mm/slub.c:5415
kmalloc_noprof include/linux/slab.h:950 [inline]
kzalloc_noprof include/linux/slab.h:1188 [inline]
push_stack+0x80/0x3a0 kernel/bpf/verifier.c:1720
check_cond_jmp_op kernel/bpf/verifier.c:16428 [inline]
do_check_insn+0xad76/0x18ab0 kernel/bpf/verifier.c:17640
do_check kernel/bpf/verifier.c:17789 [inline]
do_check_common+0x3ace/0x5780 kernel/bpf/verifier.c:18804
do_check_main kernel/bpf/verifier.c:18887 [inline]
bpf_check+0x3fea/0x49f0 kernel/bpf/verifier.c:20058
bpf_prog_load+0x1406/0x1a10 kernel/bpf/syscall.c:3082
__sys_bpf+0x618/0x950 kernel/bpf/syscall.c:6248
__do_sys_bpf kernel/bpf/syscall.c:6361 [inline]
__se_sys_bpf kernel/bpf/syscall.c:6359 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6359
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f366519cdd9
RSP: 002b:00007f3665fde028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f3665415fa0 RCX: 00007f366519cdd9
RDX: 0000000000000048 RSI: 00002000000054c0 RDI: 0000000000000005
RBP: 00007f3665232d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3665416038 R14: 00007f3665415fa0 R15: 00007ffedf91acc8
rcu: rcu_preempt kthread timer wakeup didn't happen for 10504 jiffies! g94985 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=53181
rcu: rcu_preempt kthread starved for 10505 jiffies! g94985 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27640 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x17b4/0x5680 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7282
schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 19570 Comm: syz-executor Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x90 kernel/kcov.c:314
Code: 89 44 11 20 e9 34 99 4a ff cc 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 15 08 28 73 11 65 8b 0d 29 28 73 11 81 e1 00 01 ff 00 74
RSP: 0018:ffffc90000007dd0 EFLAGS: 00000046
RAX: ffffffff81b27677 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff8880295a3300 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000fac R12: ffff8880b8628280
R13: 1ffff110170c507a R14: ffff8880b8628420 R15: 0000000000000001
FS: 0000555568b68500(0000) GS:ffff888125293000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f604b2a5e9c CR3: 0000000076a0e000 CR4: 0000000000350ef0
Call Trace:
__run_hrtimer kernel/time/hrtimer.c:1945 [inline]
__hrtimer_run_queues+0x477/0xa20 kernel/time/hrtimer.c:1994
hrtimer_interrupt+0x44b/0x950 kernel/time/hrtimer.c:2113
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
__sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1067
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1061
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2039 [inline]
RIP: 0010:vprintk_emit+0x45d/0x560 kernel/printk/printk.c:2478
Code: 0f 84 44 ff ff ff e8 72 1e 21 00 fb eb 44 e8 6a 1e 21 00 e8 d5 2f 03 0a 4d 85 f6 74 94 e8 5b 1e 21 00 fb 48 c7 c7 a0 f1 94 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 cb 18
RSP: 0018:ffffc900055deaa0 EFLAGS: 00000293
RAX: ffffffff81a48555 RBX: ffffffff81a483cf RCX: ffff88801d3a5c40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e94f1a0
RBP: ffffc900055deb50 R08: ffffffff903096f7 R09: 1ffffffff20612de
R10: dffffc0000000000 R11: fffffbfff20612df R12: 0000000000000000
R13: 0000000000000036 R14: 0000000000000200 R15: 1ffff92000abbd58
_printk+0xdd/0x130 kernel/printk/printk.c:2504
br_set_state+0x493/0x730 net/bridge/br_stp.c:57
br_init_port+0x99/0x200 net/bridge/br_stp_if.c:39
new_nbp+0x2f9/0x440 net/bridge/br_if.c:443
br_add_if+0x283/0xeb0 net/bridge/br_if.c:586
do_set_master+0x533/0x6d0 net/core/rtnetlink.c:2985
do_setlink+0x103d/0x45a0 net/core/rtnetlink.c:3187
rtnl_changelink net/core/rtnetlink.c:3799 [inline]
__rtnl_newlink net/core/rtnetlink.c:3972 [inline]
rtnl_newlink+0x15ad/0x1bb0 net/core/rtnetlink.c:4109
rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6995
netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1344
netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
sock_sendmsg_nosec net/socket.c:787 [inline]
__sock_sendmsg net/socket.c:802 [inline]
__sys_sendto+0x672/0x710 net/socket.c:2265
__do_sys_sendto net/socket.c:2272 [inline]
__se_sys_sendto net/socket.c:2268 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2268
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f13db75d60e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007ffdbaaa1de8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000555568b68500 RCX: 00007f13db75d60e
RDX: 0000000000000028 RSI: 00007f13dc544670 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007ffdbaaa1e64 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f13dc544670 R15: 0000000000000000
watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [syz-executor:17799]
Modules linked in:
irq event stamp: 932884
hardirqs last enabled at (932883): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:515 [inline]
hardirqs last enabled at (932883): [] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:550 [inline]
hardirqs last enabled at (932883): [] irqentry_exit+0x218/0x730 kernel/entry/common.c:164
hardirqs last disabled at (932884): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1061
softirqs last enabled at (932874): [] __do_softirq kernel/softirq.c:656 [inline]
softirqs last enabled at (932874): [] invoke_softirq kernel/softirq.c:496 [inline]
softirqs last enabled at (932874): [] __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
softirqs last disabled at (932791): [] __do_softirq kernel/softirq.c:656 [inline]
softirqs last disabled at (932791): [] invoke_softirq kernel/softirq.c:496 [inline]
softirqs last disabled at (932791): [] __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
CPU: 1 UID: 0 PID: 17799 Comm: syz-executor Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216
Code: 8b 3d 64 8c 60 0c 48 89 de 5b e9 33 ea 5f 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d 48 2c 73 11 65 8b 15 69 2c 73 11 81 e2 00 01 ff 00 74
RSP: 0000:ffffc900044a7838 EFLAGS: 00000202
RAX: ffffffff81b9ab26 RBX: ffff8880b873c148 RCX: ffff88805b471ec0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900044a7970 R08: ffffffff903096f7 R09: 1ffffffff20612de
R10: dffffc0000000000 R11: fffffbfff20612df R12: 1ffff110170c8589
R13: dffffc0000000000 R14: ffff8880b8642c48 R15: 0000000000000000
FS: 00005555681d3500(0000) GS:ffff888125393000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555681eea28 CR3: 00000000751ae000 CR4: 0000000000350ef0
Call Trace:
csd_lock_wait kernel/smp.c:342 [inline]
smp_call_function_many_cond+0xfe6/0x13d0 kernel/smp.c:892
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1057
__flush_tlb_multi arch/x86/include/asm/paravirt.h:46 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline]
flush_tlb_mm_range+0x5c3/0x10b0 arch/x86/mm/tlb.c:1451
flush_tlb_page arch/x86/include/asm/tlbflush.h:345 [inline]
ptep_clear_flush+0x120/0x170 mm/pgtable-generic.c:104
wp_page_copy mm/memory.c:3925 [inline]
do_wp_page+0x3da7/0x4cc0 mm/memory.c:4320
handle_pte_fault mm/memory.c:6427 [inline]
__handle_mm_fault mm/memory.c:6549 [inline]
handle_mm_fault+0x151d/0x3170 mm/memory.c:6718
do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334
handle_page_fault arch/x86/mm/fault.c:1474 [inline]
exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7fcaf1561960
Code: c4 28 00 48 8d 0c 1e 49 39 d0 49 89 48 60 0f 95 c2 48 29 d8 0f b6 d2 48 83 c8 01 48 c1 e2 02 48 09 da 48 83 ca 01 48 89 56 08 <48> 89 41 08 48 8d 4e 10 eb b0 48 8d 0d 4f da 0c 00 ba 9e 10 00 00
RSP: 002b:00007ffd90ba1140 EFLAGS: 00010206
RAX: 00000000000185e1 RBX: 0000000000008040 RCX: 00005555681eea20
RDX: 0000000000008041 RSI: 00005555681e69e0 RDI: 0000000000000004
RBP: 0000000000000802 R08: 00007fcaf17ede20 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000008030
R13: 0000000000000000 R14: 00007fcaf17ede80 R15: 0000000000000000
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 19570 Comm: syz-executor Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:match_held_lock+0x3/0xb0 kernel/locking/lockdep.c:5305
Code: b9 3a 90 31 db 48 89 d8 5b 41 5e 41 5f e9 50 87 68 f5 cc 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 56 53 01 00 00 00 48 39 77 10 74 6a 81 7f 20 00 00 20 00 72 5f 48 8b
RSP: 0018:ffffc90000007d40 EFLAGS: 00000006
RAX: 0000000000000002 RBX: 0000000000000005 RCX: 0000000000010002
RDX: 0000000000010000 RSI: ffff8880b8628298 RDI: ffff88801d3a67f8
RBP: ffff88801d3a67f8 R08: ffff8880295a3327 R09: ffff8880295a3318
R10: dffffc0000000000 R11: ffffed10052b4665 R12: 0000000000000001
R13: 0000000000000001 R14: ffff8880b8628298 R15: ffff88801d3a5c40
FS: 0000555568b68500(0000) GS:ffff888125293000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f604b2a5e9c CR3: 0000000076a0e000 CR4: 0000000000350ef0
Call Trace:
find_held_lock kernel/locking/lockdep.c:5350 [inline]
__lock_release kernel/locking/lockdep.c:5535 [inline]
lock_release+0x10c/0x3c0 kernel/locking/lockdep.c:5889
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:176 [inline]
_raw_spin_unlock_irqrestore+0x1b/0x80 kernel/locking/spinlock.c:198
__run_hrtimer kernel/time/hrtimer.c:1926 [inline]
__hrtimer_run_queues+0x2c3/0xa20 kernel/time/hrtimer.c:1994
hrtimer_interrupt+0x44b/0x950 kernel/time/hrtimer.c:2113
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
__sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1067
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1061
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2039 [inline]
RIP: 0010:vprintk_emit+0x45d/0x560 kernel/printk/printk.c:2478
Code: 0f 84 44 ff ff ff e8 72 1e 21 00 fb eb 44 e8 6a 1e 21 00 e8 d5 2f 03 0a 4d 85 f6 74 94 e8 5b 1e 21 00 fb 48 c7 c7 a0 f1 94 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 cb 18
RSP: 0018:ffffc900055deaa0 EFLAGS: 00000293
RAX: ffffffff81a48555 RBX: ffffffff81a483cf RCX: ffff88801d3a5c40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e94f1a0
RBP: ffffc900055deb50 R08: ffffffff903096f7 R09: 1ffffffff20612de
R10: dffffc0000000000 R11: fffffbfff20612df R12: 0000000000000000
R13: 0000000000000036 R14: 0000000000000200 R15: 1ffff92000abbd58
_printk+0xdd/0x130 kernel/printk/printk.c:2504
br_set_state+0x493/0x730 net/bridge/br_stp.c:57
br_init_port+0x99/0x200 net/bridge/br_stp_if.c:39
new_nbp+0x2f9/0x440 net/bridge/br_if.c:443
br_add_if+0x283/0xeb0 net/bridge/br_if.c:586
do_set_master+0x533/0x6d0 net/core/rtnetlink.c:2985
do_setlink+0x103d/0x45a0 net/core/rtnetlink.c:3187
rtnl_changelink net/core/rtnetlink.c:3799 [inline]
__rtnl_newlink net/core/rtnetlink.c:3972 [inline]
rtnl_newlink+0x15ad/0x1bb0 net/core/rtnetlink.c:4109
rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6995
netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1344
netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
sock_sendmsg_nosec net/socket.c:787 [inline]
__sock_sendmsg net/socket.c:802 [inline]
__sys_sendto+0x672/0x710 net/socket.c:2265
__do_sys_sendto net/socket.c:2272 [inline]
__se_sys_sendto net/socket.c:2268 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2268
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f13db75d60e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007ffdbaaa1de8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000555568b68500 RCX: 00007f13db75d60e
RDX: 0000000000000028 RSI: 00007f13dc544670 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007ffdbaaa1e64 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f13dc544670 R15: 0000000000000000