------------[ cut here ]------------
WARNING: CPU: 0 PID: 3704 at net/ipv4/tcp_input.c:2132 tcp_timeout_mark_lost net/ipv4/tcp_input.c:2132 [inline]
WARNING: CPU: 0 PID: 3704 at net/ipv4/tcp_input.c:2132 tcp_enter_loss+0xdb2/0x1050 net/ipv4/tcp_input.c:2145
Modules linked in:
CPU: 0 PID: 3704 Comm: syz-executor259 Not tainted 5.19.0-syzkaller-13930-g7ebfc85e2cd7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:tcp_timeout_mark_lost net/ipv4/tcp_input.c:2132 [inline]
RIP: 0010:tcp_enter_loss+0xdb2/0x1050 net/ipv4/tcp_input.c:2145
Code: 00 00 89 ab 48 09 00 00 e9 b6 fc ff ff 48 8d 83 c8 0a 00 00 48 89 44 24 08 4c 8d b3 64 08 00 00 e9 ea f7 ff ff e8 be 2c 9d f9 <0f> 0b e9 b1 f6 ff ff e8 b2 2c 9d f9 0f 0b e9 7c fb ff ff e8 f6 83
RSP: 0018:ffffc90000007ac8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888025b61800 RCX: 0000000000000100
RDX: ffff8880233e3b00 RSI: ffffffff87deda52 RDI: 0000000000000004
RBP: 0000000000000009 R08: 0000000000000004 R09: 0000000000000011
R10: 0000000000000009 R11: 0000000000000002 R12: 0000000000000011
R13: 0000000000000008 R14: 0000000000000001 R15: 0000000000000009
FS: 00007f2c54c6a700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002002a000 CR3: 000000001c1f7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
tcp_retransmit_timer+0x25a3/0x33d0 net/ipv4/tcp_timer.c:503
tcp_write_timer_handler net/ipv4/tcp_timer.c:620 [inline]
tcp_write_timer_handler+0x4de/0x9f0 net/ipv4/tcp_timer.c:594
tcp_write_timer+0xa2/0x2b0 net/ipv4/tcp_timer.c:637
call_timer_fn+0x1a0/0x6b0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1519 [inline]
__run_timers.part.0+0x674/0xa80 kernel/time/timer.c:1790
__run_timers kernel/time/timer.c:1768 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803
__do_softirq+0x1d3/0x9c6 kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:check_region_inline mm/kasan/generic.c:170 [inline]
RIP: 0010:kasan_check_range+0x12c/0x180 mm/kasan/generic.c:189
Code: 00 74 ef 49 8d 04 2c 48 85 d2 75 0b 48 89 da 48 29 c2 e9 55 ff ff ff 49 39 d2 75 17 49 0f be 02 41 83 e1 07 49 39 c1 7d 0a 5b 01 00 00 00 5d 41 5c c3 44 89 c2 e8 c3 ee ff ff 5b 83 f0 01 5d
RSP: 0018:ffffc90003b0f768 EFLAGS: 00000246
RAX: fffffbfff1bbd0eb RBX: 0000000000000000 RCX: ffffffff815f7401
RDX: fffffbfff1bbd0eb RSI: 0000000000000008 RDI: ffffffff8dde8750
RBP: fffffbfff1bbd0ea R08: 0000000000000000 R09: ffffffff8dde8757
R10: fffffbfff1bbd0ea R11: 0000000000000000 R12: ffff888072869d28
R13: 000000002002a000 R14: 0000000000000000 R15: ffff888072869c00
instrument_atomic_read include/linux/instrumented.h:71 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
cpumask_test_cpu include/linux/cpumask.h:370 [inline]
cpu_online include/linux/cpumask.h:945 [inline]
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0xa1/0x780 kernel/locking/lockdep.c:5677
up_read+0x12/0x20 kernel/locking/rwsem.c:1594
mmap_read_unlock include/linux/mmap_lock.h:144 [inline]
do_user_addr_fault+0x4d7/0x1210 arch/x86/mm/fault.c:1425
handle_page_fault arch/x86/mm/fault.c:1488 [inline]
exc_page_fault+0x94/0x170 arch/x86/mm/fault.c:1544
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:166
Code: ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01 cb 83 fa 40 72 38 89 d1 a4 31 c0 0f 01 ca c3 89 ca eb 0a 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc90003b0f9a0 EFLAGS: 00050206
RAX: 0000000000000001 RBX: 00000000000057df RCX: 0000000000003a1f
RDX: 00000000000057df RSI: 000000002002a000 RDI: ffff88807ae51dc0
RBP: 00007fffffff9821 R08: 0000000000000001 R09: ffff88807ae557de
R10: ffffed100f5caafb R11: 0000000000000000 R12: ffff88807ae50000
R13: 0000000020028240 R14: ffff88807ae50000 R15: 0000000000000000
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
copyin lib/iov_iter.c:181 [inline]
copyin+0xf6/0x120 lib/iov_iter.c:175
_copy_from_iter+0x36e/0x11c0 lib/iov_iter.c:628
copy_from_iter include/linux/uio.h:184 [inline]
copy_from_iter_full include/linux/uio.h:191 [inline]
skb_do_copy_data_nocache include/net/sock.h:2214 [inline]
skb_copy_to_page_nocache include/net/sock.h:2240 [inline]
tcp_sendmsg_locked+0x138e/0x2f80 net/ipv4/tcp.c:1376
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1483
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:734
__sys_sendto+0x236/0x340 net/socket.c:2117
__do_sys_sendto net/socket.c:2129 [inline]
__se_sys_sendto net/socket.c:2125 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:2125
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+0x63/0xcd
RIP: 0033:0x7f2c54cbc299
================================
WARNING: inconsistent lock state
5.19.0-syzkaller-13930-g7ebfc85e2cd7 #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
syz-executor259/3704 [HC0[0]:SC1[1]:HE1:SE0] takes:
ffffffff8c0bee78 (vmap_area_lock){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline]
ffffffff8c0bee78 (vmap_area_lock){+.?.}-{2:2}, at: find_vmap_area+0x1c/0x130 mm/vmalloc.c:1836
{SOFTIRQ-ON-W} state was registered at:
lock_acquire kernel/locking/lockdep.c:5666 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:349 [inline]
alloc_vmap_area+0xa0b/0x1d50 mm/vmalloc.c:1617
__get_vm_area_node+0x142/0x3f0 mm/vmalloc.c:2484
get_vm_area_caller+0x43/0x50 mm/vmalloc.c:2537
__ioremap_caller.constprop.0+0x292/0x600 arch/x86/mm/ioremap.c:280
acpi_os_ioremap include/acpi/acpi_io.h:13 [inline]
acpi_map drivers/acpi/osl.c:296 [inline]
acpi_os_map_iomem+0x463/0x550 drivers/acpi/osl.c:355
acpi_tb_acquire_table+0xd8/0x209 drivers/acpi/acpica/tbdata.c:142
acpi_tb_validate_table drivers/acpi/acpica/tbdata.c:317 [inline]
acpi_tb_validate_table+0x50/0x8c drivers/acpi/acpica/tbdata.c:308
acpi_tb_verify_temp_table+0x84/0x674 drivers/acpi/acpica/tbdata.c:504
acpi_reallocate_root_table+0x374/0x3e0 drivers/acpi/acpica/tbxface.c:180
acpi_early_init+0x13a/0x438 drivers/acpi/bus.c:1214
start_kernel+0x3cf/0x48f init/main.c:1099
secondary_startup_64_no_verify+0xce/0xdb
irq event stamp: 2598
hardirqs last enabled at (2598): [] console_trylock_spinning kernel/printk/printk.c:1904 [inline]
hardirqs last enabled at (2598): [] vprintk_emit+0x56f/0x5f0 kernel/printk/printk.c:2270
hardirqs last disabled at (2597): [] console_trylock_spinning kernel/printk/printk.c:1883 [inline]
hardirqs last disabled at (2597): [] vprintk_emit+0x506/0x5f0 kernel/printk/printk.c:2270
softirqs last enabled at (1492): [] do_softirq.part.0+0xde/0x130 kernel/softirq.c:472
softirqs last disabled at (1539): [] invoke_softirq kernel/softirq.c:445 [inline]
softirqs last disabled at (1539): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(vmap_area_lock);
lock(vmap_area_lock);
*** DEADLOCK ***
4 locks held by syz-executor259/3704:
#0: ffff888025b62530 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1687 [inline]
#0: ffff888025b62530 (sk_lock-AF_INET){+.+.}-{0:0}, at: sk_stream_wait_memory+0x888/0xec0 net/core/stream.c:145
#1: ffff888072869d28
(&mm->mmap_lock
#2){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#2){++++}-{3:3}, at: do_user_addr_fault+0x276/0x1210 arch/x86/mm/fault.c:1338
#2: ffffc90000007d70
((&icsk->icsk_retransmit_timer)){+.-.}-{0:0}
, at: lockdep_copy_map include/linux/lockdep.h:31 [inline]
, at: call_timer_fn+0xd5/0x6b0 kernel/time/timer.c:1464
#3: ffff888025b618b0 (
slock-AF_INET){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline]
slock-AF_INET){+.-.}-{2:2}, at: tcp_write_timer+0x26/0x2b0 net/ipv4/tcp_timer.c:635
stack backtrace:
CPU: 0 PID: 3704 Comm: syz-executor259 Not tainted 5.19.0-syzkaller-13930-g7ebfc85e2cd7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_usage_bug kernel/locking/lockdep.c:3961 [inline]
valid_state kernel/locking/lockdep.c:3973 [inline]
mark_lock_irq kernel/locking/lockdep.c:4176 [inline]
mark_lock.part.0.cold+0x18/0xd8 kernel/locking/lockdep.c:4632
mark_lock kernel/locking/lockdep.c:4596 [inline]
mark_usage kernel/locking/lockdep.c:4527 [inline]
__lock_acquire+0x11d9/0x56d0 kernel/locking/lockdep.c:5007
lock_acquire kernel/locking/lockdep.c:5666 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:349 [inline]
find_vmap_area+0x1c/0x130 mm/vmalloc.c:1836
check_heap_object mm/usercopy.c:176 [inline]
__check_object_size mm/usercopy.c:250 [inline]
__check_object_size+0x1f8/0x700 mm/usercopy.c:212
check_object_size include/linux/thread_info.h:199 [inline]
__copy_from_user_inatomic include/linux/uaccess.h:62 [inline]
copy_from_user_nmi arch/x86/lib/usercopy.c:47 [inline]
copy_from_user_nmi+0xcb/0x130 arch/x86/lib/usercopy.c:31
copy_code arch/x86/kernel/dumpstack.c:91 [inline]
show_opcodes+0x59/0xb0 arch/x86/kernel/dumpstack.c:121
show_iret_regs+0xd/0x33 arch/x86/kernel/dumpstack.c:149
__show_regs+0x1e/0x60 arch/x86/kernel/process_64.c:74
show_trace_log_lvl+0x25b/0x2ba arch/x86/kernel/dumpstack.c:292
__warn+0xe2/0x190 kernel/panic.c:621
report_bug+0x1bc/0x210 lib/bug.c:198
handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:316
exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:336
asm_exc_invalid_op+0x16/0x20 arch/x86/include/asm/idtentry.h:568
RIP: 0010:tcp_timeout_mark_lost net/ipv4/tcp_input.c:2132 [inline]
RIP: 0010:tcp_enter_loss+0xdb2/0x1050 net/ipv4/tcp_input.c:2145
Code: 00 00 89 ab 48 09 00 00 e9 b6 fc ff ff 48 8d 83 c8 0a 00 00 48 89 44 24 08 4c 8d b3 64 08 00 00 e9 ea f7 ff ff e8 be 2c 9d f9 <0f> 0b e9 b1 f6 ff ff e8 b2 2c 9d f9 0f 0b e9 7c fb ff ff e8 f6 83
RSP: 0018:ffffc90000007ac8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888025b61800 RCX: 0000000000000100
RDX: ffff8880233e3b00 RSI: ffffffff87deda52 RDI: 0000000000000004
RBP: 0000000000000009 R08: 0000000000000004 R09: 0000000000000011
R10: 0000000000000009 R11: 0000000000000002 R12: 0000000000000011
R13: 0000000000000008 R14: 0000000000000001 R15: 0000000000000009
tcp_retransmit_timer+0x25a3/0x33d0 net/ipv4/tcp_timer.c:503
tcp_write_timer_handler net/ipv4/tcp_timer.c:620 [inline]
tcp_write_timer_handler+0x4de/0x9f0 net/ipv4/tcp_timer.c:594
tcp_write_timer+0xa2/0x2b0 net/ipv4/tcp_timer.c:637
call_timer_fn+0x1a0/0x6b0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1519 [inline]
__run_timers.part.0+0x674/0xa80 kernel/time/timer.c:1790
__run_timers kernel/time/timer.c:1768 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803
__do_softirq+0x1d3/0x9c6 kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:check_region_inline mm/kasan/generic.c:170 [inline]
RIP: 0010:kasan_check_range+0x12c/0x180 mm/kasan/generic.c:189
Code: 00 74 ef 49 8d 04 2c 48 85 d2 75 0b 48 89 da 48 29 c2 e9 55 ff ff ff 49 39 d2 75 17 49 0f be 02 41 83 e1 07 49 39 c1 7d 0a 5b 01 00 00 00 5d 41 5c c3 44 89 c2 e8 c3 ee ff ff 5b 83 f0 01 5d
RSP: 0018:ffffc90003b0f768 EFLAGS: 00000246
RAX: fffffbfff1bbd0eb RBX: 0000000000000000 RCX: ffffffff815f7401
RDX: fffffbfff1bbd0eb RSI: 0000000000000008 RDI: ffffffff8dde8750
RBP: fffffbfff1bbd0ea R08: 0000000000000000 R09: ffffffff8dde8757
R10: fffffbfff1bbd0ea R11: 0000000000000000 R12: ffff888072869d28
R13: 000000002002a000 R14: 0000000000000000 R15: ffff888072869c00
instrument_atomic_read include/linux/instrumented.h:71 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
cpumask_test_cpu include/linux/cpumask.h:370 [inline]
cpu_online include/linux/cpumask.h:945 [inline]
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0xa1/0x780 kernel/locking/lockdep.c:5677
up_read+0x12/0x20 kernel/locking/rwsem.c:1594
mmap_read_unlock include/linux/mmap_lock.h:144 [inline]
do_user_addr_fault+0x4d7/0x1210 arch/x86/mm/fault.c:1425
handle_page_fault arch/x86/mm/fault.c:1488 [inline]
exc_page_fault+0x94/0x170 arch/x86/mm/fault.c:1544
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:166
Code: ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01 cb 83 fa 40 72 38 89 d1 a4 31 c0 0f 01 ca c3 89 ca eb 0a 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc90003b0f9a0 EFLAGS: 00050206
RAX: 0000000000000001 RBX: 00000000000057df RCX: 0000000000003a1f
RDX: 00000000000057df RSI: 000000002002a000 RDI: ffff88807ae51dc0
RBP: 00007fffffff9821 R08: 0000000000000001 R09: ffff88807ae557de
R10: ffffed100f5caafb R11: 0000000000000000 R12: ffff88807ae50000
R13: 0000000020028240 R14: ffff88807ae50000 R15: 0000000000000000
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
copyin lib/iov_iter.c:181 [inline]
copyin+0xf6/0x120 lib/iov_iter.c:175
_copy_from_iter+0x36e/0x11c0 lib/iov_iter.c:628
copy_from_iter include/linux/uio.h:184 [inline]
copy_from_iter_full include/linux/uio.h:191 [inline]
skb_do_copy_data_nocache include/net/sock.h:2214 [inline]
skb_copy_to_page_nocache include/net/sock.h:2240 [inline]
tcp_sendmsg_locked+0x138e/0x2f80 net/ipv4/tcp.c:1376
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1483
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:734
__sys_sendto+0x236/0x340 net/socket.c:2117
__do_sys_sendto net/socket.c:2129 [inline]
__se_sys_sendto net/socket.c:2125 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:2125
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+0x63/0xcd
RIP: 0033:0x7f2c54cbc299
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 15 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2c54c6a2e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f2c54d444a0 RCX: 00007f2c54cbc299
RDX: ffffffffffffffe6 RSI: 0000000020000240 RDI: 0000000000000003
RBP: 00007f2c54d444ac R08: 0000000000000000 R09: 0000000000000000
R10: 00000000040047ac R11: 0000000000000246 R12: 00007f2c54d11754
R13: 00007f2c54d114c8 R14: 0000000020000240 R15: 00007f2c54d444a8
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 15 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2c54c6a2e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f2c54d444a0 RCX: 00007f2c54cbc299
RDX: ffffffffffffffe6 RSI: 0000000020000240 RDI: 0000000000000003
RBP: 00007f2c54d444ac R08: 0000000000000000 R09: 0000000000000000
R10: 00000000040047ac R11: 0000000000000246 R12: 00007f2c54d11754
R13: 00007f2c54d114c8 R14: 0000000020000240 R15: 00007f2c54d444a8
----------------
Code disassembly (best guess):
0: 00 74 ef 49 add %dh,0x49(%rdi,%rbp,8)
4: 8d 04 2c lea (%rsp,%rbp,1),%eax
7: 48 85 d2 test %rdx,%rdx
a: 75 0b jne 0x17
c: 48 89 da mov %rbx,%rdx
f: 48 29 c2 sub %rax,%rdx
12: e9 55 ff ff ff jmpq 0xffffff6c
17: 49 39 d2 cmp %rdx,%r10
1a: 75 17 jne 0x33
1c: 49 0f be 02 movsbq (%r10),%rax
20: 41 83 e1 07 and $0x7,%r9d
24: 49 39 c1 cmp %rax,%r9
27: 7d 0a jge 0x33
29: 5b pop %rbx
* 2a: b8 01 00 00 00 mov $0x1,%eax <-- trapping instruction
2f: 5d pop %rbp
30: 41 5c pop %r12
32: c3 retq
33: 44 89 c2 mov %r8d,%edx
36: e8 c3 ee ff ff callq 0xffffeefe
3b: 5b pop %rbx
3c: 83 f0 01 xor $0x1,%eax
3f: 5d pop %rbp