------------[ cut here ]------------ ====================================================== WARNING: possible circular locking dependency detected 6.11.0-rc3-next-20240816-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor981/5632 is trying to acquire lock: ffffffff8e92d780 (console_owner){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:342 [inline] ffffffff8e92d780 (console_owner){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:267 [inline] ffffffff8e92d780 (console_owner){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:286 [inline] ffffffff8e92d780 (console_owner){....}-{0:0}, at: console_flush_all+0x152/0xfd0 kernel/printk/printk.c:3041 but task is already holding lock: ffff8880b913ea58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:587 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&rq->__lock){-.-.}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5762 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:587 raw_spin_rq_lock kernel/sched/sched.h:1485 [inline] task_rq_lock+0xc6/0x360 kernel/sched/core.c:689 cgroup_move_task+0x92/0x2d0 kernel/sched/psi.c:1161 css_set_move_task+0x72e/0x950 kernel/cgroup/cgroup.c:898 cgroup_post_fork+0x256/0x880 kernel/cgroup/cgroup.c:6690 copy_process+0x3ab1/0x3e30 kernel/fork.c:2620 kernel_clone+0x226/0x8f0 kernel/fork.c:2806 user_mode_thread+0x132/0x1a0 kernel/fork.c:2884 rest_init+0x23/0x300 init/main.c:712 start_kernel+0x47a/0x500 init/main.c:1103 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488 common_startup_64+0x13e/0x147 -> #3 (&p->pi_lock){-.-.}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5762 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline] try_to_wake_up+0xb0/0x1470 kernel/sched/core.c:4113 __wake_up_common kernel/sched/wait.c:89 [inline] __wake_up_common_lock+0x130/0x1e0 kernel/sched/wait.c:106 tty_port_default_wakeup+0xa6/0xf0 drivers/tty/tty_port.c:69 serial8250_tx_chars+0x6e2/0x930 drivers/tty/serial/8250/8250_port.c:1821 serial8250_handle_irq+0x558/0x710 drivers/tty/serial/8250/8250_port.c:1929 serial8250_default_handle_irq+0xd1/0x1f0 drivers/tty/serial/8250/8250_port.c:1949 serial8250_interrupt+0xa9/0x1f0 drivers/tty/serial/8250/8250_core.c:86 __handle_irq_event_percpu+0x29a/0xa80 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x89/0x1f0 kernel/irq/handle.c:210 handle_edge_irq+0x25f/0xc20 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:173 [inline] handle_irq arch/x86/kernel/irq.c:247 [inline] call_irq_handler arch/x86/kernel/irq.c:259 [inline] __common_interrupt+0x136/0x230 arch/x86/kernel/irq.c:285 common_interrupt+0xb4/0xd0 arch/x86/kernel/irq.c:278 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline] acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111 acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:702 cpuidle_enter_state+0x112/0x480 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:230 [inline] do_idle+0x375/0x5d0 kernel/sched/idle.c:326 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424 __pfx_ap_starting+0x0/0x10 arch/x86/kernel/smpboot.c:313 common_startup_64+0x13e/0x147 -> #2 (&tty->write_wait){-.-.}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5762 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 __wake_up_common_lock+0x25/0x1e0 kernel/sched/wait.c:105 tty_port_default_wakeup+0xa6/0xf0 drivers/tty/tty_port.c:69 serial8250_tx_chars+0x6e2/0x930 drivers/tty/serial/8250/8250_port.c:1821 serial8250_handle_irq+0x558/0x710 drivers/tty/serial/8250/8250_port.c:1929 serial8250_default_handle_irq+0xd1/0x1f0 drivers/tty/serial/8250/8250_port.c:1949 serial8250_interrupt+0xa9/0x1f0 drivers/tty/serial/8250/8250_core.c:86 __handle_irq_event_percpu+0x29a/0xa80 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x89/0x1f0 kernel/irq/handle.c:210 handle_edge_irq+0x25f/0xc20 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:173 [inline] handle_irq arch/x86/kernel/irq.c:247 [inline] call_irq_handler arch/x86/kernel/irq.c:259 [inline] __common_interrupt+0x136/0x230 arch/x86/kernel/irq.c:285 common_interrupt+0xb4/0xd0 arch/x86/kernel/irq.c:278 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline] acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111 acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:702 cpuidle_enter_state+0x112/0x480 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:230 [inline] do_idle+0x375/0x5d0 kernel/sched/idle.c:326 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424 __pfx_ap_starting+0x0/0x10 arch/x86/kernel/smpboot.c:313 common_startup_64+0x13e/0x147 -> #1 (&port_lock_key){-.-.}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5762 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 uart_port_lock_irqsave include/linux/serial_core.h:618 [inline] serial8250_console_write+0x1a8/0x1770 drivers/tty/serial/8250/8250_port.c:3352 console_emit_next_record kernel/printk/printk.c:2983 [inline] console_flush_all+0x867/0xfd0 kernel/printk/printk.c:3049 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3118 vprintk_emit+0x5dc/0x7c0 kernel/printk/printk.c:2348 _printk+0xd5/0x120 kernel/printk/printk.c:2373 register_console+0x727/0xcf0 kernel/printk/printk.c:3654 univ8250_console_init+0x52/0x90 drivers/tty/serial/8250/8250_core.c:513 console_init+0x1b8/0x6f0 kernel/printk/printk.c:3800 start_kernel+0x2d3/0x500 init/main.c:1038 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488 common_startup_64+0x13e/0x147 -> #0 (console_owner){....}-{0:0}: check_prev_add kernel/locking/lockdep.c:3136 [inline] check_prevs_add kernel/locking/lockdep.c:3255 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3871 __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5145 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5762 console_lock_spinning_enable kernel/printk/printk.c:1873 [inline] console_emit_next_record kernel/printk/printk.c:2977 [inline] console_flush_all+0x810/0xfd0 kernel/printk/printk.c:3049 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3118 vprintk_emit+0x5dc/0x7c0 kernel/printk/printk.c:2348 _printk+0xd5/0x120 kernel/printk/printk.c:2373 __report_bug lib/bug.c:195 [inline] report_bug+0x346/0x500 lib/bug.c:219 handle_bug+0x60/0x90 arch/x86/kernel/traps.c:285 exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:309 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621 lockdep_assert_rq_held kernel/sched/sched.h:1476 [inline] rq_clock kernel/sched/sched.h:1624 [inline] replenish_dl_new_period kernel/sched/deadline.c:777 [inline] update_curr_dl_se+0x66f/0x920 kernel/sched/deadline.c:1511 update_curr+0x575/0xb20 kernel/sched/fair.c:1176 put_prev_entity+0x3d/0x210 kernel/sched/fair.c:5505 put_prev_task_fair+0x4d/0x80 kernel/sched/fair.c:8686 put_prev_task kernel/sched/sched.h:2423 [inline] put_prev_task_balance+0x11d/0x190 kernel/sched/core.c:5886 __pick_next_task+0xc6/0x2f0 kernel/sched/core.c:5946 pick_next_task kernel/sched/core.c:6012 [inline] __schedule+0x725/0x4ad0 kernel/sched/core.c:6594 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6961 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707 syscall_enter_from_user_mode_work include/linux/entry-common.h:165 [inline] syscall_enter_from_user_mode include/linux/entry-common.h:198 [inline] do_syscall_64+0xbc/0x230 arch/x86/entry/common.c:79 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 *** 3 locks held by syz-executor981/5632: #0: ffff8880b913ea58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:587 #1: ffffffff8e8150a0 (console_lock){+.+.}-{0:0}, at: _printk+0xd5/0x120 kernel/printk/printk.c:2373 #2: ffffffff8e814cd0 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:342 [inline] #2: ffffffff8e814cd0 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:267 [inline] #2: ffffffff8e814cd0 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:286 [inline] #2: ffffffff8e814cd0 (console_srcu){....}-{0:0}, at: console_flush_all+0x152/0xfd0 kernel/printk/printk.c:3041 stack backtrace: CPU: 1 UID: 0 PID: 5632 Comm: syz-executor981 Not tainted 6.11.0-rc3-next-20240816-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2189 check_prev_add kernel/locking/lockdep.c:3136 [inline] check_prevs_add kernel/locking/lockdep.c:3255 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3871 __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5145 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5762 console_lock_spinning_enable kernel/printk/printk.c:1873 [inline] console_emit_next_record kernel/printk/printk.c:2977 [inline] console_flush_all+0x810/0xfd0 kernel/printk/printk.c:3049 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3118 vprintk_emit+0x5dc/0x7c0 kernel/printk/printk.c:2348 _printk+0xd5/0x120 kernel/printk/printk.c:2373 __report_bug lib/bug.c:195 [inline] report_bug+0x346/0x500 lib/bug.c:219 handle_bug+0x60/0x90 arch/x86/kernel/traps.c:285 exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:309 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621 RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1476 [inline] RIP: 0010:rq_clock kernel/sched/sched.h:1624 [inline] RIP: 0010:replenish_dl_new_period kernel/sched/deadline.c:777 [inline] RIP: 0010:update_curr_dl_se+0x66f/0x920 kernel/sched/deadline.c:1511 Code: b5 50 fe ff ff 4c 89 ff ba 20 00 00 00 e8 e9 4f 00 00 e9 58 fe ff ff 4c 89 ef be 20 00 00 00 e8 b7 13 00 00 e9 46 fe ff ff 90 <0f> 0b 90 e9 be fb ff ff 89 f1 80 e1 07 38 c1 0f 8c b5 f9 ff ff 48 RSP: 0018:ffffc9000496f9e8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8880b903ea40 RCX: 0000000000000003 RDX: dffffc0000000000 RSI: ffffffff8c0adfc0 RDI: ffffffff8c60a8c0 RBP: 0000000000000031 R08: ffff8880b902c883 R09: 1ffff11017205910 R10: dffffc0000000000 R11: ffffed1017205911 R12: ffff8880b903f468 R13: ffff8880b903f428 R14: 1ffff11017207e8f R15: ffff8880b903f858 update_curr+0x575/0xb20 kernel/sched/fair.c:1176 put_prev_entity+0x3d/0x210 kernel/sched/fair.c:5505 put_prev_task_fair+0x4d/0x80 kernel/sched/fair.c:8686 put_prev_task kernel/sched/sched.h:2423 [inline] put_prev_task_balance+0x11d/0x190 kernel/sched/core.c:5886 __pick_next_task+0xc6/0x2f0 kernel/sched/core.c:5946 pick_next_task kernel/sched/core.c:6012 [inline] __schedule+0x725/0x4ad0 kernel/sched/core.c:6594 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6961 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707 RIP: 0010:syscall_enter_from_user_mode_work include/linux/entry-common.h:167 [inline] RIP: 0010:syscall_enter_from_user_mode include/linux/entry-common.h:198 [inline] RIP: 0010:do_syscall_64+0xbc/0x230 arch/x86/entry/common.c:79 Code: ed 00 00 00 48 8b 7d 08 e8 81 64 00 00 0f 1f 44 00 00 0f 1f 44 00 00 90 e8 61 ea df f5 90 90 e8 0a ea df f5 fb 49 8b 54 24 08 c2 3f 74 0e 4c 89 f7 4c 89 fe e8 94 cf c1 f5 49 89 c7 90 90 41 RSP: 0018:ffffc9000496ff10 EFLAGS: 00000282 RAX: e18eac7768bad800 RBX: ffffc9000496ff10 RCX: ffffffff94f43903 RDX: 0000000000000000 RSI: ffffffff8c0ace40 RDI: ffffffff8c60a8c0 RBP: ffffc9000496ff48 R08: ffffffff9018c5af R09: 1ffffffff20318b5 R10: dffffc0000000000 R11: fffffbfff20318b6 R12: ffff8880249c0000 R13: 0000000000000000 R14: ffffc9000496ff58 R15: 000000000000014e entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6c3b914b9c Code: 00 00 48 89 c7 e8 a4 ce 04 00 e9 81 00 00 00 48 8d bb 20 09 00 00 41 ba 53 30 05 53 31 d2 be 20 00 00 00 b8 4e 01 00 00 0f 05 <3d> 00 f0 ff ff 0f 86 08 fe ff ff 64 c7 04 25 24 09 00 00 fe ff ff RSP: 002b:00007f6c3b8ca1a0 EFLAGS: 00000246 ORIG_RAX: 000000000000014e RAX: ffffffffffffffda RBX: 00007f6c3b8ca6c0 RCX: 00007f6c3b914b9c RDX: 0000000000000000 RSI: 0000000000000020 RDI: 00007f6c3b8cafe0 RBP: 0000000000000000 R08: 00007f6c3b8ca6c0 R09: 00007ffc69da3077 R10: 0000000053053053 R11: 0000000000000246 R12: ffffffffffffffb0 R13: 000000000000006e R14: 00007ffc69da2f90 R15: 00007ffc69da3078 WARNING: CPU: 1 PID: 5632 at kernel/sched/sched.h:1476 lockdep_assert_rq_held kernel/sched/sched.h:1476 [inline] WARNING: CPU: 1 PID: 5632 at kernel/sched/sched.h:1476 rq_clock kernel/sched/sched.h:1624 [inline] WARNING: CPU: 1 PID: 5632 at kernel/sched/sched.h:1476 replenish_dl_new_period kernel/sched/deadline.c:777 [inline] WARNING: CPU: 1 PID: 5632 at kernel/sched/sched.h:1476 update_curr_dl_se+0x66f/0x920 kernel/sched/deadline.c:1511 Modules linked in: CPU: 1 UID: 0 PID: 5632 Comm: syz-executor981 Not tainted 6.11.0-rc3-next-20240816-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1476 [inline] RIP: 0010:rq_clock kernel/sched/sched.h:1624 [inline] RIP: 0010:replenish_dl_new_period kernel/sched/deadline.c:777 [inline] RIP: 0010:update_curr_dl_se+0x66f/0x920 kernel/sched/deadline.c:1511 Code: b5 50 fe ff ff 4c 89 ff ba 20 00 00 00 e8 e9 4f 00 00 e9 58 fe ff ff 4c 89 ef be 20 00 00 00 e8 b7 13 00 00 e9 46 fe ff ff 90 <0f> 0b 90 e9 be fb ff ff 89 f1 80 e1 07 38 c1 0f 8c b5 f9 ff ff 48 RSP: 0018:ffffc9000496f9e8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8880b903ea40 RCX: 0000000000000003 RDX: dffffc0000000000 RSI: ffffffff8c0adfc0 RDI: ffffffff8c60a8c0 RBP: 0000000000000031 R08: ffff8880b902c883 R09: 1ffff11017205910 R10: dffffc0000000000 R11: ffffed1017205911 R12: ffff8880b903f468 R13: ffff8880b903f428 R14: 1ffff11017207e8f R15: ffff8880b903f858 FS: 00007f6c3b8ca6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc69da3058 CR3: 000000002b51a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: update_curr+0x575/0xb20 kernel/sched/fair.c:1176 put_prev_entity+0x3d/0x210 kernel/sched/fair.c:5505 put_prev_task_fair+0x4d/0x80 kernel/sched/fair.c:8686 put_prev_task kernel/sched/sched.h:2423 [inline] put_prev_task_balance+0x11d/0x190 kernel/sched/core.c:5886 __pick_next_task+0xc6/0x2f0 kernel/sched/core.c:5946 pick_next_task kernel/sched/core.c:6012 [inline] __schedule+0x725/0x4ad0 kernel/sched/core.c:6594 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6961 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707 RIP: 0010:syscall_enter_from_user_mode_work include/linux/entry-common.h:167 [inline] RIP: 0010:syscall_enter_from_user_mode include/linux/entry-common.h:198 [inline] RIP: 0010:do_syscall_64+0xbc/0x230 arch/x86/entry/common.c:79 Code: ed 00 00 00 48 8b 7d 08 e8 81 64 00 00 0f 1f 44 00 00 0f 1f 44 00 00 90 e8 61 ea df f5 90 90 e8 0a ea df f5 fb 49 8b 54 24 08 c2 3f 74 0e 4c 89 f7 4c 89 fe e8 94 cf c1 f5 49 89 c7 90 90 41 RSP: 0018:ffffc9000496ff10 EFLAGS: 00000282 RAX: e18eac7768bad800 RBX: ffffc9000496ff10 RCX: ffffffff94f43903 RDX: 0000000000000000 RSI: ffffffff8c0ace40 RDI: ffffffff8c60a8c0 RBP: ffffc9000496ff48 R08: ffffffff9018c5af R09: 1ffffffff20318b5 R10: dffffc0000000000 R11: fffffbfff20318b6 R12: ffff8880249c0000 R13: 0000000000000000 R14: ffffc9000496ff58 R15: 000000000000014e entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6c3b914b9c Code: 00 00 48 89 c7 e8 a4 ce 04 00 e9 81 00 00 00 48 8d bb 20 09 00 00 41 ba 53 30 05 53 31 d2 be 20 00 00 00 b8 4e 01 00 00 0f 05 <3d> 00 f0 ff ff 0f 86 08 fe ff ff 64 c7 04 25 24 09 00 00 fe ff ff RSP: 002b:00007f6c3b8ca1a0 EFLAGS: 00000246 ORIG_RAX: 000000000000014e RAX: ffffffffffffffda RBX: 00007f6c3b8ca6c0 RCX: 00007f6c3b914b9c RDX: 0000000000000000 RSI: 0000000000000020 RDI: 00007f6c3b8cafe0 RBP: 0000000000000000 R08: 00007f6c3b8ca6c0 R09: 00007ffc69da3077 R10: 0000000053053053 R11: 0000000000000246 R12: ffffffffffffffb0 R13: 000000000000006e R14: 00007ffc69da2f90 R15: 00007ffc69da3078 ---------------- Code disassembly (best guess): 0: ed in (%dx),%eax 1: 00 00 add %al,(%rax) 3: 00 48 8b add %cl,-0x75(%rax) 6: 7d 08 jge 0x10 8: e8 81 64 00 00 call 0x648e d: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 12: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 17: 90 nop 18: e8 61 ea df f5 call 0xf5dfea7e 1d: 90 nop 1e: 90 nop 1f: e8 0a ea df f5 call 0xf5dfea2e 24: fb sti 25: 49 8b 54 24 08 mov 0x8(%r12),%rdx * 2a: f6 c2 3f test $0x3f,%dl <-- trapping instruction 2d: 74 0e je 0x3d 2f: 4c 89 f7 mov %r14,%rdi 32: 4c 89 fe mov %r15,%rsi 35: e8 94 cf c1 f5 call 0xf5c1cfce 3a: 49 89 c7 mov %rax,%r15 3d: 90 nop 3e: 90 nop 3f: 41 rex.B