FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 0 ====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc4-syzkaller-00052-g4f79eaa2ceac #0 Not tainted ------------------------------------------------------ syz.4.75/6156 is trying to acquire lock: ffffffff8e2cca00 (console_owner){-.-.}-{0:0}, at: console_trylock_spinning kernel/printk/printk.c:2048 [inline] ffffffff8e2cca00 (console_owner){-.-.}-{0:0}, at: vprintk_emit+0x4d4/0x6d0 kernel/printk/printk.c:2449 but task is already holding lock: ffff8880b8439dd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:613 [inline] ffff8880b8439dd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:598 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&rq->__lock){-.-.}-{2:2}: _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:605 raw_spin_rq_lock kernel/sched/sched.h:1513 [inline] task_rq_lock+0xcf/0x490 kernel/sched/core.c:707 cgroup_move_task+0x81/0x2a0 kernel/sched/psi.c:1161 css_set_move_task+0x288/0x5f0 kernel/cgroup/cgroup.c:911 cgroup_post_fork+0x201/0x9e0 kernel/cgroup/cgroup.c:6744 copy_process+0x5006/0x91a0 kernel/fork.c:2658 kernel_clone+0xfc/0x960 kernel/fork.c:2844 user_mode_thread+0xc7/0x110 kernel/fork.c:2922 rest_init+0x23/0x2b0 init/main.c:708 start_kernel+0x3e9/0x4d0 init/main.c:1099 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:513 x86_64_start_kernel+0xb0/0xc0 arch/x86/kernel/head64.c:494 common_startup_64+0x13e/0x148 -> #3 (&p->pi_lock){-.-.}-{2:2}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:557 [inline] try_to_wake_up+0xb2/0x1680 kernel/sched/core.c:4212 __wake_up_common+0x132/0x1f0 kernel/sched/wait.c:89 __wake_up_common_lock kernel/sched/wait.c:106 [inline] __wake_up+0x31/0x60 kernel/sched/wait.c:127 tty_port_default_wakeup+0x2a/0x40 drivers/tty/tty_port.c:69 serial8250_tx_chars+0x68e/0x860 drivers/tty/serial/8250/8250_port.c:1842 serial8250_handle_irq+0x761/0xcb0 drivers/tty/serial/8250/8250_port.c:1950 serial8250_default_handle_irq+0x9a/0x210 drivers/tty/serial/8250/8250_port.c:1970 serial8250_interrupt+0x103/0x210 drivers/tty/serial/8250/8250_core.c:86 __handle_irq_event_percpu+0x229/0x7d0 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x263/0xd10 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:173 [inline] handle_irq arch/x86/kernel/irq.c:254 [inline] call_irq_handler arch/x86/kernel/irq.c:266 [inline] __common_interrupt+0xdf/0x250 arch/x86/kernel/irq.c:292 common_interrupt+0xba/0xe0 arch/x86/kernel/irq.c:285 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202 rcu_gp_cleanup+0x224/0xd90 kernel/rcu/tree.c:2161 rcu_gp_kthread+0x281/0x380 kernel/rcu/tree.c:2252 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #2 (&tty->write_wait){-.-.}-{3:3}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 __wake_up_common_lock kernel/sched/wait.c:105 [inline] __wake_up+0x1c/0x60 kernel/sched/wait.c:127 tty_port_default_wakeup+0x2a/0x40 drivers/tty/tty_port.c:69 serial8250_tx_chars+0x68e/0x860 drivers/tty/serial/8250/8250_port.c:1842 serial8250_handle_irq+0x761/0xcb0 drivers/tty/serial/8250/8250_port.c:1950 serial8250_default_handle_irq+0x9a/0x210 drivers/tty/serial/8250/8250_port.c:1970 serial8250_interrupt+0x103/0x210 drivers/tty/serial/8250/8250_core.c:86 __handle_irq_event_percpu+0x229/0x7d0 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x263/0xd10 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:173 [inline] handle_irq arch/x86/kernel/irq.c:254 [inline] call_irq_handler arch/x86/kernel/irq.c:266 [inline] __common_interrupt+0xdf/0x250 arch/x86/kernel/irq.c:292 common_interrupt+0xba/0xe0 arch/x86/kernel/irq.c:285 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] uart_port_unlock_irqrestore include/linux/serial_core.h:786 [inline] uart_write+0x2a4/0xb30 drivers/tty/serial/serial_core.c:636 process_output_block drivers/tty/n_tty.c:561 [inline] n_tty_write+0x40f/0x1160 drivers/tty/n_tty.c:2377 iterate_tty_write drivers/tty/tty_io.c:1015 [inline] file_tty_write.constprop.0+0x4ff/0x9b0 drivers/tty/tty_io.c:1090 tty_write drivers/tty/tty_io.c:1111 [inline] redirected_tty_write drivers/tty/tty_io.c:1134 [inline] redirected_tty_write+0xd4/0x150 drivers/tty/tty_io.c:1114 new_sync_write fs/read_write.c:591 [inline] vfs_write+0x5ba/0x1180 fs/read_write.c:684 ksys_write+0x12a/0x240 fs/read_write.c:736 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&port_lock_key){-.-.}-{3:3}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 uart_port_lock_irqsave include/linux/serial_core.h:715 [inline] serial8250_console_write+0x181/0x1890 drivers/tty/serial/8250/8250_port.c:3415 console_emit_next_record kernel/printk/printk.c:3138 [inline] console_flush_all+0x801/0xc60 kernel/printk/printk.c:3226 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline] console_unlock+0xd8/0x210 kernel/printk/printk.c:3325 vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450 _printk+0xc7/0x100 kernel/printk/printk.c:2475 register_console+0xc2d/0x11b0 kernel/printk/printk.c:4125 univ8250_console_init+0x5f/0x90 drivers/tty/serial/8250/8250_core.c:513 console_init+0x14f/0x680 kernel/printk/printk.c:4323 start_kernel+0x29f/0x4d0 init/main.c:1034 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:513 x86_64_start_kernel+0xb0/0xc0 arch/x86/kernel/head64.c:494 common_startup_64+0x13e/0x148 -> #0 (console_owner){-.-.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x1173/0x1ba0 kernel/locking/lockdep.c:5235 lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 console_trylock_spinning kernel/printk/printk.c:2048 [inline] vprintk_emit+0x4e5/0x6d0 kernel/printk/printk.c:2449 _printk+0xc7/0x100 kernel/printk/printk.c:2475 fail_dump lib/fault-inject.c:66 [inline] should_fail_ex+0x4e7/0x640 lib/fault-inject.c:174 __copy_to_user_inatomic include/linux/uaccess.h:132 [inline] copy_to_user_nofault+0xac/0x190 mm/maccess.c:156 ____bpf_probe_write_user kernel/trace/bpf_trace.c:348 [inline] bpf_probe_write_user+0xaf/0xf0 kernel/trace/bpf_trace.c:326 bpf_prog_6303d92f98284ad8+0x44/0x48 bpf_dispatcher_nop_func include/linux/bpf.h:1316 [inline] __bpf_prog_run include/linux/filter.h:718 [inline] bpf_prog_run include/linux/filter.h:725 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2363 [inline] bpf_trace_run4+0x249/0x5a0 kernel/trace/bpf_trace.c:2406 __bpf_trace_sched_switch+0x145/0x190 include/trace/events/sched.h:220 __traceiter_sched_switch+0x6c/0xc0 include/trace/events/sched.h:220 __do_trace_sched_switch include/trace/events/sched.h:220 [inline] trace_sched_switch include/trace/events/sched.h:220 [inline] __schedule+0x1bf3/0x5de0 kernel/sched/core.c:6764 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7090 irqentry_exit+0x36/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5831 __might_fault mm/memory.c:7151 [inline] __might_fault+0x113/0x190 mm/memory.c:7145 _inline_copy_to_user include/linux/uaccess.h:192 [inline] _copy_to_user+0x2d/0xd0 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:225 [inline] simple_read_from_buffer+0xcb/0x170 fs/libfs.c:1121 proc_fail_nth_read+0x197/0x270 fs/proc/base.c:1482 vfs_read+0x1de/0xc70 fs/read_write.c:568 ksys_read+0x12a/0x240 fs/read_write.c:713 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: console_owner --> &p->pi_lock --> &rq->__lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rq->__lock); lock(&p->pi_lock); lock(&rq->__lock); lock(console_owner); *** DEADLOCK *** 4 locks held by syz.4.75/6156: #0: ffff888012da9978 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x2a2/0x370 fs/file.c:1213 #1: ffff8880369b81e0 (&mm->mmap_lock){++++}-{4:4}, at: __might_fault mm/memory.c:7151 [inline] #1: ffff8880369b81e0 (&mm->mmap_lock){++++}-{4:4}, at: __might_fault+0xe3/0x190 mm/memory.c:7145 #2: ffff8880b8439dd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:613 [inline] #2: ffff8880b8439dd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:598 #3: ffffffff8e3bf5c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #3: ffffffff8e3bf5c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #3: ffffffff8e3bf5c0 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2362 [inline] #3: ffffffff8e3bf5c0 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run4+0x1cf/0x5a0 kernel/trace/bpf_trace.c:2406 stack backtrace: CPU: 1 UID: 0 PID: 6156 Comm: syz.4.75 Not tainted 6.15.0-rc4-syzkaller-00052-g4f79eaa2ceac #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2079 check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2211 check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x1173/0x1ba0 kernel/locking/lockdep.c:5235 lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 console_trylock_spinning kernel/printk/printk.c:2048 [inline] vprintk_emit+0x4e5/0x6d0 kernel/printk/printk.c:2449 _printk+0xc7/0x100 kernel/printk/printk.c:2475 fail_dump lib/fault-inject.c:66 [inline] should_fail_ex+0x4e7/0x640 lib/fault-inject.c:174 __copy_to_user_inatomic include/linux/uaccess.h:132 [inline] copy_to_user_nofault+0xac/0x190 mm/maccess.c:156 ____bpf_probe_write_user kernel/trace/bpf_trace.c:348 [inline] bpf_probe_write_user+0xaf/0xf0 kernel/trace/bpf_trace.c:326 bpf_prog_6303d92f98284ad8+0x44/0x48 bpf_dispatcher_nop_func include/linux/bpf.h:1316 [inline] __bpf_prog_run include/linux/filter.h:718 [inline] bpf_prog_run include/linux/filter.h:725 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2363 [inline] bpf_trace_run4+0x249/0x5a0 kernel/trace/bpf_trace.c:2406 __bpf_trace_sched_switch+0x145/0x190 include/trace/events/sched.h:220 __traceiter_sched_switch+0x6c/0xc0 include/trace/events/sched.h:220 __do_trace_sched_switch include/trace/events/sched.h:220 [inline] trace_sched_switch include/trace/events/sched.h:220 [inline] __schedule+0x1bf3/0x5de0 kernel/sched/core.c:6764 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7090 irqentry_exit+0x36/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5870 Code: ce 0b 12 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 42 eb ec 0e 0f 82 74 02 00 00 8b 35 da 1a ed 0e 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 19 ce 0b 12 0f 85 c7 02 00 00 48 83 c4 RSP: 0018:ffffc90005837b68 EFLAGS: 00000206 RAX: 0000000000000046 RBX: ffff8880369b81e0 RCX: ffffffff93b0db60 RDX: 0000000000000000 RSI: ffffffff8dbbb2ff RDI: ffffffff8bf47e20 RBP: 0000000000000001 R08: 0f6bc385111e219f R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 __might_fault mm/memory.c:7151 [inline] __might_fault+0x113/0x190 mm/memory.c:7145 _inline_copy_to_user include/linux/uaccess.h:192 [inline] _copy_to_user+0x2d/0xd0 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:225 [inline] simple_read_from_buffer+0xcb/0x170 fs/libfs.c:1121 proc_fail_nth_read+0x197/0x270 fs/proc/base.c:1482 vfs_read+0x1de/0xc70 fs/read_write.c:568 ksys_read+0x12a/0x240 fs/read_write.c:713 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc3c158d37c Code: ec 28 48 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 99 93 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 48 89 44 24 08 e8 ef 93 02 00 48 RSP: 002b:00007fc3c24c0030 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fc3c17b5fa0 RCX: 00007fc3c158d37c RDX: 000000000000000f RSI: 00007fc3c24c00a0 RDI: 0000000000000009 RBP: 00007fc3c24c0090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 00007fc3c17b5fa0 R15: 00007fffb2fc1628 CPU: 1 UID: 0 PID: 6156 Comm: syz.4.75 Not tainted 6.15.0-rc4-syzkaller-00052-g4f79eaa2ceac #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 fail_dump lib/fault-inject.c:73 [inline] should_fail_ex+0x512/0x640 lib/fault-inject.c:174 __copy_to_user_inatomic include/linux/uaccess.h:132 [inline] copy_to_user_nofault+0xac/0x190 mm/maccess.c:156 ____bpf_probe_write_user kernel/trace/bpf_trace.c:348 [inline] bpf_probe_write_user+0xaf/0xf0 kernel/trace/bpf_trace.c:326 bpf_prog_6303d92f98284ad8+0x44/0x48 bpf_dispatcher_nop_func include/linux/bpf.h:1316 [inline] __bpf_prog_run include/linux/filter.h:718 [inline] bpf_prog_run include/linux/filter.h:725 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2363 [inline] bpf_trace_run4+0x249/0x5a0 kernel/trace/bpf_trace.c:2406 __bpf_trace_sched_switch+0x145/0x190 include/trace/events/sched.h:220 __traceiter_sched_switch+0x6c/0xc0 include/trace/events/sched.h:220 __do_trace_sched_switch include/trace/events/sched.h:220 [inline] trace_sched_switch include/trace/events/sched.h:220 [inline] __schedule+0x1bf3/0x5de0 kernel/sched/core.c:6764 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7090 irqentry_exit+0x36/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5870 Code: ce 0b 12 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 42 eb ec 0e 0f 82 74 02 00 00 8b 35 da 1a ed 0e 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 19 ce 0b 12 0f 85 c7 02 00 00 48 83 c4 RSP: 0018:ffffc90005837b68 EFLAGS: 00000206 RAX: 0000000000000046 RBX: ffff8880369b81e0 RCX: ffffffff93b0db60 RDX: 0000000000000000 RSI: ffffffff8dbbb2ff RDI: ffffffff8bf47e20 RBP: 0000000000000001 R08: 0f6bc385111e219f R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 __might_fault mm/memory.c:7151 [inline] __might_fault+0x113/0x190 mm/memory.c:7145 _inline_copy_to_user include/linux/uaccess.h:192 [inline] _copy_to_user+0x2d/0xd0 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:225 [inline] simple_read_from_buffer+0xcb/0x170 fs/libfs.c:1121 proc_fail_nth_read+0x197/0x270 fs/proc/base.c:1482 vfs_read+0x1de/0xc70 fs/read_write.c:568 ksys_read+0x12a/0x240 fs/read_write.c:713 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc3c158d37c Code: ec 28 48 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 99 93 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 48 89 44 24 08 e8 ef 93 02 00 48 RSP: 002b:00007fc3c24c0030 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fc3c17b5fa0 RCX: 00007fc3c158d37c RDX: 000000000000000f RSI: 00007fc3c24c00a0 RDI: 0000000000000009 RBP: 00007fc3c24c0090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 00007fc3c17b5fa0 R15: 00007fffb2fc1628 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 0b 12 or (%rdx),%edx 2: 83 f8 07 cmp $0x7,%eax 5: 0f 87 bc 02 00 00 ja 0x2c7 b: 89 c0 mov %eax,%eax d: 48 0f a3 05 42 eb ec bt %rax,0xeeceb42(%rip) # 0xeeceb57 14: 0e 15: 0f 82 74 02 00 00 jb 0x28f 1b: 8b 35 da 1a ed 0e mov 0xeed1ada(%rip),%esi # 0xeed1afb 21: 85 f6 test %esi,%esi 23: 0f 85 8d 00 00 00 jne 0xb6 * 29: 48 8b 44 24 30 mov 0x30(%rsp),%rax <-- trapping instruction 2e: 65 48 2b 05 19 ce 0b sub %gs:0x120bce19(%rip),%rax # 0x120bce4f 35: 12 36: 0f 85 c7 02 00 00 jne 0x303 3c: 48 rex.W 3d: 83 .byte 0x83 3e: c4 .byte 0xc4