rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (0 ticks this GP) idle=b63/1/0x4000000000000000 softirq=101290/101290 fqs=0
(detected by 1, t=10506 jiffies, g=169153, q=34 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3628 Comm: syz-executor.4 Not tainted 5.18.0-syzkaller-11338-g2c5ca23f7414 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:84 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0xcd/0x180 mm/kasan/generic.c:189
Code: 8d 50 08 eb 09 48 83 c0 01 48 39 d0 74 7a 80 38 00 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e <48> 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 80 38 00 74 f2 eb d4 41
RSP: 0018:ffffc90000007d20 EFLAGS: 00000002
RAX: fffffbfff1b75fba RBX: fffffbfff1b75fbb RCX: ffffffff815d8478
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffff8dbafdd0
RBP: fffffbfff1b75fba R08: 0000000000000000 R09: ffffffff8dbafdd7
R10: fffffbfff1b75fba R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880b9c2a518 R15: 0000000000000000
FS: 000055555666e400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30223000 CR3: 000000004a8ff000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
cpumask_test_cpu include/linux/cpumask.h:379 [inline]
cpu_online include/linux/cpumask.h:921 [inline]
trace_lock_acquire include/trace/events/lock.h:24 [inline]
lock_acquire+0xb8/0x570 kernel/locking/lockdep.c:5636
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irq+0x32/0x50 kernel/locking/spinlock.c:170
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x243/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194
Code: 74 24 10 e8 ea 4d e4 f7 48 89 ef e8 f2 ce e4 f7 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 a3 d8 d7 f7 65 8b 05 bc 40 89 76 85 c0 74 0a 5b 5d c3 e8 b0 c0
RSP: 0018:ffffc90003147c78 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1b759e1
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff8880b9c2a500 R08: 0000000000000001 R09: 0000000000000001
R10: ffffed10173854a0 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffc90003147dd8 R15: ffff888022520040
hrtimer_start_expires include/linux/hrtimer.h:432 [inline]
hrtimer_sleeper_start_expires kernel/time/hrtimer.c:1965 [inline]
do_nanosleep+0x1e8/0x690 kernel/time/hrtimer.c:2041
hrtimer_nanosleep+0x1f9/0x4a0 kernel/time/hrtimer.c:2097
common_nsleep+0xa2/0xc0 kernel/time/posix-timers.c:1227
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1267 [inline]
__se_sys_clock_nanosleep kernel/time/posix-timers.c:1245 [inline]
__x64_sys_clock_nanosleep+0x2f4/0x430 kernel/time/posix-timers.c:1245
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7fd8094ade31
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 aa e7 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 e3 e7 ff ff 48 8b 04 24 eb 97 66 2e 0f 1f
RSP: 002b:00007ffda5df4e80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00000000000013ff RCX: 00007fd8094ade31
RDX: 00007ffda5df4ec0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffda5df4f4c R08: 0000000000000000 R09: 00007ffda5df7080
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 00000000001c74db R14: 0000000000000001 R15: 00007ffda5df4fb0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g169153 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=89518
rcu: rcu_preempt kthread starved for 10506 jiffies! g169153 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:28360 pid: 17 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5116 [inline]
__schedule+0xa00/0x4b30 kernel/sched/core.c:6431
schedule+0xd2/0x1f0 kernel/sched/core.c:6503
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1935
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1999
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2187
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3628 Comm: syz-executor.4 Not tainted 5.18.0-syzkaller-11338-g2c5ca23f7414 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lockdep_recursion_inc kernel/locking/lockdep.c:461 [inline]
RIP: 0010:lock_is_held_type+0x55/0x140 kernel/locking/lockdep.c:5707
Code: 0f 85 ca 00 00 00 65 4c 8b 24 25 80 6f 02 00 41 8b 94 24 5c 0a 00 00 85 d2 0f 85 b1 00 00 00 48 89 fd 41 89 f6 9c 8f 04 24 fa <48> c7 c7 a0 66 cc 89 31 db e8 dd 0d 00 00 41 8b 84 24 58 0a 00 00
RSP: 0018:ffffc90000007e00 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88801c10fb40 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff8880b9c2a518
RBP: ffff8880b9c2a518 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff888022520040
R13: 00000000ffffffff R14: 00000000ffffffff R15: 0000000000000001
FS: 000055555666e400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30223000 CR3: 000000004a8ff000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_is_held include/linux/lockdep.h:279 [inline]
__run_hrtimer kernel/time/hrtimer.c:1651 [inline]
__hrtimer_run_queues+0x95a/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194
Code: 74 24 10 e8 ea 4d e4 f7 48 89 ef e8 f2 ce e4 f7 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 a3 d8 d7 f7 65 8b 05 bc 40 89 76 85 c0 74 0a 5b 5d c3 e8 b0 c0
RSP: 0018:ffffc90003147c78 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1b759e1
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff8880b9c2a500 R08: 0000000000000001 R09: 0000000000000001
R10: ffffed10173854a0 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffc90003147dd8 R15: ffff888022520040
hrtimer_start_expires include/linux/hrtimer.h:432 [inline]
hrtimer_sleeper_start_expires kernel/time/hrtimer.c:1965 [inline]
do_nanosleep+0x1e8/0x690 kernel/time/hrtimer.c:2041
hrtimer_nanosleep+0x1f9/0x4a0 kernel/time/hrtimer.c:2097
common_nsleep+0xa2/0xc0 kernel/time/posix-timers.c:1227
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1267 [inline]
__se_sys_clock_nanosleep kernel/time/posix-timers.c:1245 [inline]
__x64_sys_clock_nanosleep+0x2f4/0x430 kernel/time/posix-timers.c:1245
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7fd8094ade31
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 aa e7 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 e3 e7 ff ff 48 8b 04 24 eb 97 66 2e 0f 1f
RSP: 002b:00007ffda5df4e80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00000000000013ff RCX: 00007fd8094ade31
RDX: 00007ffda5df4ec0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffda5df4f4c R08: 0000000000000000 R09: 00007ffda5df7080
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 00000000001c74db R14: 0000000000000001 R15: 00007ffda5df4fb0
watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [kworker/u4:9:4657]
Modules linked in:
irq event stamp: 21462076
hardirqs last enabled at (21462075): [] asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649
hardirqs last disabled at (21462076): [] sysvec_apic_timer_interrupt+0xb/0xc0 arch/x86/kernel/apic/apic.c:1106
softirqs last enabled at (21412348): [] invoke_softirq kernel/softirq.c:445 [inline]
softirqs last enabled at (21412348): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
softirqs last disabled at (21412317): [] invoke_softirq kernel/softirq.c:445 [inline]
softirqs last disabled at (21412317): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
CPU: 1 PID: 4657 Comm: kworker/u4:9 Not tainted 5.18.0-syzkaller-11338-g2c5ca23f7414 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:414 [inline]
RIP: 0010:smp_call_function_many_cond+0x499/0x1110 kernel/smp.c:988
Code: 01 89 ee e8 f9 98 0a 00 85 ed 74 47 48 8b 04 24 49 89 c4 83 e0 07 49 c1 ec 03 48 89 c5 4d 01 fc 83 c5 03 e8 99 9c 0a 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 21 0a 00 00 8b 43 08 31
RSP: 0018:ffffc90004707950 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffe8ffffc0bd20 RCX: 0000000000000000
RDX: ffff8880275f81c0 RSI: ffffffff816f0627 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: fffff91ffff817a5
R13: 0000000000000000 R14: 0000000000000001 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f61359674a3 CR3: 000000000ba8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1154
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1231 [inline]
text_poke_bp_batch+0x233/0x6c0 arch/x86/kernel/alternative.c:1419
text_poke_flush arch/x86/kernel/alternative.c:1589 [inline]
text_poke_flush arch/x86/kernel/alternative.c:1586 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1596
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
jump_label_update+0x32f/0x410 kernel/jump_label.c:830
static_key_enable_cpuslocked+0x1b1/0x260 kernel/jump_label.c:177
static_key_enable+0x16/0x20 kernel/jump_label.c:190
toggle_allocation_gate mm/kfence/core.c:808 [inline]
toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:800
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3628 Comm: syz-executor.4 Not tainted 5.18.0-syzkaller-11338-g2c5ca23f7414 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x70/0x5660 kernel/locking/lockdep.c:4911
Code: 87 5f 8b 48 c7 84 24 98 00 00 00 20 1a 5d 81 44 89 44 24 08 48 89 44 24 20 48 8d 84 24 88 00 00 00 48 c1 e8 03 48 89 44 24 30 <48> 01 d0 c7 00 f1 f1 f1 f1 c7 40 04 f1 f1 04 f2 c7 40 08 00 f3 f3
RSP: 0018:ffffc90000007ac0 EFLAGS: 00000806
RAX: 1ffff92000000f69 RBX: ffffffff907b4468 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff907b4468
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001
FS: 000055555666e400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30223000 CR3: 000000004a8ff000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5665 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
debug_object_activate+0x12e/0x3e0 lib/debugobjects.c:658
debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline]
debug_activate kernel/time/hrtimer.c:475 [inline]
enqueue_hrtimer+0x27/0x3e0 kernel/time/hrtimer.c:1084
__run_hrtimer kernel/time/hrtimer.c:1702 [inline]
__hrtimer_run_queues+0xb02/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194
Code: 74 24 10 e8 ea 4d e4 f7 48 89 ef e8 f2 ce e4 f7 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 a3 d8 d7 f7 65 8b 05 bc 40 89 76 85 c0 74 0a 5b 5d c3 e8 b0 c0
RSP: 0018:ffffc90003147c78 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1b759e1
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff8880b9c2a500 R08: 0000000000000001 R09: 0000000000000001
R10: ffffed10173854a0 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffc90003147dd8 R15: ffff888022520040
hrtimer_start_expires include/linux/hrtimer.h:432 [inline]
hrtimer_sleeper_start_expires kernel/time/hrtimer.c:1965 [inline]
do_nanosleep+0x1e8/0x690 kernel/time/hrtimer.c:2041
hrtimer_nanosleep+0x1f9/0x4a0 kernel/time/hrtimer.c:2097
common_nsleep+0xa2/0xc0 kernel/time/posix-timers.c:1227
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1267 [inline]
__se_sys_clock_nanosleep kernel/time/posix-timers.c:1245 [inline]
__x64_sys_clock_nanosleep+0x2f4/0x430 kernel/time/posix-timers.c:1245
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7fd8094ade31
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 aa e7 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 e3 e7 ff ff 48 8b 04 24 eb 97 66 2e 0f 1f
RSP: 002b:00007ffda5df4e80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00000000000013ff RCX: 00007fd8094ade31
RDX: 00007ffda5df4ec0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffda5df4f4c R08: 0000000000000000 R09: 00007ffda5df7080
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 00000000001c74db R14: 0000000000000001 R15: 00007ffda5df4fb0
----------------
Code disassembly (best guess):
0: 8d 50 08 lea 0x8(%rax),%edx
3: eb 09 jmp 0xe
5: 48 83 c0 01 add $0x1,%rax
9: 48 39 d0 cmp %rdx,%rax
c: 74 7a je 0x88
e: 80 38 00 cmpb $0x0,(%rax)
11: 74 f2 je 0x5
13: 48 89 c2 mov %rax,%rdx
16: b8 01 00 00 00 mov $0x1,%eax
1b: 48 85 d2 test %rdx,%rdx
1e: 75 56 jne 0x76
20: 5b pop %rbx
21: 5d pop %rbp
22: 41 5c pop %r12
24: c3 retq
25: 48 85 d2 test %rdx,%rdx
28: 74 5e je 0x88
* 2a: 48 01 ea add %rbp,%rdx <-- trapping instruction
2d: eb 09 jmp 0x38
2f: 48 83 c0 01 add $0x1,%rax
33: 48 39 d0 cmp %rdx,%rax
36: 74 50 je 0x88
38: 80 38 00 cmpb $0x0,(%rax)
3b: 74 f2 je 0x2f
3d: eb d4 jmp 0x13
3f: 41 rex.B