FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 0 ====================================================== WARNING: possible circular locking dependency detected 6.9.0-rc5-syzkaller-01160-g2bd87951de65 #0 Not tainted ------------------------------------------------------ syz-executor.0/8157 is trying to acquire lock: ffffffff8e328f00 (console_owner){..-.}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:334 [inline] ffffffff8e328f00 (console_owner){..-.}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline] ffffffff8e328f00 (console_owner){..-.}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:286 [inline] ffffffff8e328f00 (console_owner){..-.}-{0:0}, at: console_flush_all+0x152/0xfd0 kernel/printk/printk.c:2971 but task is already holding lock: ffff8880b953e698 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 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:5754 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 raw_spin_rq_lock kernel/sched/sched.h:1387 [inline] rq_lock kernel/sched/sched.h:1701 [inline] task_fork_fair+0x61/0x1e0 kernel/sched/fair.c:12635 sched_cgroup_fork+0x37c/0x410 kernel/sched/core.c:4845 copy_process+0x2217/0x3df0 kernel/fork.c:2499 kernel_clone+0x226/0x8f0 kernel/fork.c:2797 user_mode_thread+0x132/0x1a0 kernel/fork.c:2875 rest_init+0x23/0x300 init/main.c:704 start_kernel+0x47a/0x500 init/main.c:1081 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x99/0xa0 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:5754 __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:553 [inline] try_to_wake_up+0xb0/0x1470 kernel/sched/core.c:4262 __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+0x6ad/0x8a0 drivers/tty/serial/8250/8250_port.c:1825 serial8250_handle_irq+0x558/0x710 drivers/tty/serial/8250/8250_port.c:1932 serial8250_default_handle_irq+0xd1/0x1f0 drivers/tty/serial/8250/8250_port.c:1952 serial8250_interrupt+0xa9/0x1f0 drivers/tty/serial/8250/8250_core.c:127 __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:161 [inline] handle_irq arch/x86/kernel/irq.c:238 [inline] __common_interrupt+0x138/0x230 arch/x86/kernel/irq.c:257 common_interrupt+0xa5/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 get_current arch/x86/include/asm/current.h:49 [inline] __sanitizer_cov_trace_pc+0x11/0x70 kernel/kcov.c:206 unwind_get_return_address+0x71/0xc0 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0x125/0x1b0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2106 [inline] slab_free mm/slub.c:4280 [inline] kfree+0x153/0x3a0 mm/slub.c:4390 tomoyo_realpath_from_path+0x5a9/0x5e0 security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x23a/0x880 security/tomoyo/file.c:723 security_file_ioctl+0x75/0xb0 security/security.c:2764 __do_sys_ioctl fs/ioctl.c:898 [inline] __se_sys_ioctl+0x47/0x170 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&tty->write_wait){-...}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __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+0x6ad/0x8a0 drivers/tty/serial/8250/8250_port.c:1825 serial8250_handle_irq+0x558/0x710 drivers/tty/serial/8250/8250_port.c:1932 serial8250_default_handle_irq+0xd1/0x1f0 drivers/tty/serial/8250/8250_port.c:1952 serial8250_interrupt+0xa9/0x1f0 drivers/tty/serial/8250/8250_core.c:127 __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:161 [inline] handle_irq arch/x86/kernel/irq.c:238 [inline] __common_interrupt+0x138/0x230 arch/x86/kernel/irq.c:257 common_interrupt+0xa5/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] uart_port_unlock_irqrestore include/linux/serial_core.h:670 [inline] uart_write+0x437/0x5c0 drivers/tty/serial/serial_core.c:629 process_output_block drivers/tty/n_tty.c:574 [inline] n_tty_write+0xd6a/0x1230 drivers/tty/n_tty.c:2379 iterate_tty_write drivers/tty/tty_io.c:1021 [inline] file_tty_write+0x54f/0x9b0 drivers/tty/tty_io.c:1096 call_write_iter include/linux/fs.h:2110 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa84/0xcb0 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&port_lock_key){-.-.}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __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:619 [inline] serial8250_console_write+0x1a8/0x1770 drivers/tty/serial/8250/8250_port.c:3355 console_emit_next_record kernel/printk/printk.c:2913 [inline] console_flush_all+0x867/0xfd0 kernel/printk/printk.c:2979 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3048 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2348 _printk+0xd5/0x120 kernel/printk/printk.c:2373 register_console+0x727/0xcf0 kernel/printk/printk.c:3569 univ8250_console_init+0x49/0x50 drivers/tty/serial/8250/8250_core.c:717 console_init+0x1b8/0x6f0 kernel/printk/printk.c:3715 start_kernel+0x2d3/0x500 init/main.c:1016 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:488 common_startup_64+0x13e/0x147 -> #0 (console_owner){..-.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x18cb/0x58e0 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 console_lock_spinning_enable kernel/printk/printk.c:1873 [inline] console_emit_next_record kernel/printk/printk.c:2907 [inline] console_flush_all+0x810/0xfd0 kernel/printk/printk.c:2979 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3048 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2348 _printk+0xd5/0x120 kernel/printk/printk.c:2373 fail_dump lib/fault-inject.c:45 [inline] should_fail_ex+0x391/0x4e0 lib/fault-inject.c:153 strncpy_from_user+0x36/0x2f0 lib/strncpy_from_user.c:118 strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186 bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:216 [inline] ____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:311 [inline] bpf_probe_read_compat_str+0xe9/0x180 kernel/trace/bpf_trace.c:307 bpf_prog_1b1fa9c7e3e0101d+0x42/0x44 bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline] __bpf_prog_run include/linux/filter.h:660 [inline] bpf_prog_run include/linux/filter.h:674 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2396 [inline] bpf_trace_run2+0x47d/0x530 kernel/trace/bpf_trace.c:2437 trace_tlb_flush+0x118/0x140 include/trace/events/tlb.h:38 switch_mm_irqs_off+0x7cb/0xae0 context_switch kernel/sched/core.c:5393 [inline] __schedule+0x1066/0x4a50 kernel/sched/core.c:6746 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7068 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 stack_trace_consume_entry+0x2f/0x280 kernel/stacktrace.c:86 arch_stack_walk+0x143/0x1b0 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3966 [inline] __kmalloc+0x233/0x4a0 mm/slub.c:3979 kmalloc include/linux/slab.h:632 [inline] kzalloc include/linux/slab.h:749 [inline] tomoyo_encode2 security/tomoyo/realpath.c:45 [inline] tomoyo_encode+0x26f/0x540 security/tomoyo/realpath.c:80 tomoyo_realpath_from_path+0x59e/0x5e0 security/tomoyo/realpath.c:283 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x23a/0x880 security/tomoyo/file.c:723 security_file_ioctl+0x75/0xb0 security/security.c:2764 __do_sys_ioctl fs/ioctl.c:898 [inline] __se_sys_ioctl+0x47/0x170 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 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 *** 5 locks held by syz-executor.0/8157: #0: ffffffff8e9b42d0 (tomoyo_ss){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:116 [inline] #0: ffffffff8e9b42d0 (tomoyo_ss){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:215 [inline] #0: ffffffff8e9b42d0 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_read_lock security/tomoyo/common.h:1108 [inline] #0: ffffffff8e9b42d0 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_path_number_perm+0x208/0x880 security/tomoyo/file.c:722 #1: ffff8880b953e698 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 #2: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #2: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #2: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2395 [inline] #2: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x1fc/0x530 kernel/trace/bpf_trace.c:2437 #3: ffffffff8e210820 (console_lock){+.+.}-{0:0}, at: _printk+0xd5/0x120 kernel/printk/printk.c:2373 #4: ffffffff8e210450 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:334 [inline] #4: ffffffff8e210450 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline] #4: ffffffff8e210450 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:286 [inline] #4: ffffffff8e210450 (console_srcu){....}-{0:0}, at: console_flush_all+0x152/0xfd0 kernel/printk/printk.c:2971 stack backtrace: CPU: 1 PID: 8157 Comm: syz-executor.0 Not tainted 6.9.0-rc5-syzkaller-01160-g2bd87951de65 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x18cb/0x58e0 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 console_lock_spinning_enable kernel/printk/printk.c:1873 [inline] console_emit_next_record kernel/printk/printk.c:2907 [inline] console_flush_all+0x810/0xfd0 kernel/printk/printk.c:2979 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3048 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2348 _printk+0xd5/0x120 kernel/printk/printk.c:2373 fail_dump lib/fault-inject.c:45 [inline] should_fail_ex+0x391/0x4e0 lib/fault-inject.c:153 strncpy_from_user+0x36/0x2f0 lib/strncpy_from_user.c:118 strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186 bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:216 [inline] ____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:311 [inline] bpf_probe_read_compat_str+0xe9/0x180 kernel/trace/bpf_trace.c:307 bpf_prog_1b1fa9c7e3e0101d+0x42/0x44 bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline] __bpf_prog_run include/linux/filter.h:660 [inline] bpf_prog_run include/linux/filter.h:674 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2396 [inline] bpf_trace_run2+0x47d/0x530 kernel/trace/bpf_trace.c:2437 trace_tlb_flush+0x118/0x140 include/trace/events/tlb.h:38 switch_mm_irqs_off+0x7cb/0xae0 context_switch kernel/sched/core.c:5393 [inline] __schedule+0x1066/0x4a50 kernel/sched/core.c:6746 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7068 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:stack_trace_consume_entry+0x2f/0x280 kernel/stacktrace.c:86 Code: 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 89 fb 48 ba 00 00 00 00 00 fc ff df 4c 8d 4f 10 4d 89 cf 49 c1 ef 03 41 0f b6 04 17 <84> c0 0f 85 06 01 00 00 44 8b 43 10 48 8d 6b 08 49 89 ec 49 c1 ec RSP: 0018:ffffc90002ebf650 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: ffffc90002ebf780 RCX: ffff88801c32da00 RDX: dffffc0000000000 RSI: ffffffff846254a5 RDI: ffffc90002ebf780 RBP: ffffc90002ebf730 R08: ffffffff8137d242 R09: ffffc90002ebf790 R10: 0000000000000003 R11: ffffffff8181e080 R12: ffff88801c32da00 R13: ffffffff8181e080 R14: ffffc90002ebf780 R15: 1ffff920005d7ef2 arch_stack_walk+0x143/0x1b0 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3966 [inline] __kmalloc+0x233/0x4a0 mm/slub.c:3979 kmalloc include/linux/slab.h:632 [inline] kzalloc include/linux/slab.h:749 [inline] tomoyo_encode2 security/tomoyo/realpath.c:45 [inline] tomoyo_encode+0x26f/0x540 security/tomoyo/realpath.c:80 tomoyo_realpath_from_path+0x59e/0x5e0 security/tomoyo/realpath.c:283 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x23a/0x880 security/tomoyo/file.c:723 security_file_ioctl+0x75/0xb0 security/security.c:2764 __do_sys_ioctl fs/ioctl.c:898 [inline] __se_sys_ioctl+0x47/0x170 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f68c9e7dea9 Code: Unable to access opcode bytes at 0x7f68c9e7de7f. RSP: 002b:00007f68cabc00c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f68c9fabf80 RCX: 00007f68c9e7dea9 RDX: 0000000020000200 RSI: 00000000000089e0 RDI: 0000000000000004 RBP: 00007f68cabc0120 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 000000000000000b R14: 00007f68c9fabf80 R15: 00007fffa463c068 CPU: 1 PID: 8157 Comm: syz-executor.0 Not tainted 6.9.0-rc5-syzkaller-01160-g2bd87951de65 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 fail_dump lib/fault-inject.c:52 [inline] should_fail_ex+0x3b0/0x4e0 lib/fault-inject.c:153 strncpy_from_user+0x36/0x2f0 lib/strncpy_from_user.c:118 strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186 bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:216 [inline] ____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:311 [inline] bpf_probe_read_compat_str+0xe9/0x180 kernel/trace/bpf_trace.c:307 bpf_prog_1b1fa9c7e3e0101d+0x42/0x44 bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline] __bpf_prog_run include/linux/filter.h:660 [inline] bpf_prog_run include/linux/filter.h:674 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2396 [inline] bpf_trace_run2+0x47d/0x530 kernel/trace/bpf_trace.c:2437 trace_tlb_flush+0x118/0x140 include/trace/events/tlb.h:38 switch_mm_irqs_off+0x7cb/0xae0 context_switch kernel/sched/core.c:5393 [inline] __schedule+0x1066/0x4a50 kernel/sched/core.c:6746 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7068 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:stack_trace_consume_entry+0x2f/0x280 kernel/stacktrace.c:86 Code: 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 89 fb 48 ba 00 00 00 00 00 fc ff df 4c 8d 4f 10 4d 89 cf 49 c1 ef 03 41 0f b6 04 17 <84> c0 0f 85 06 01 00 00 44 8b 43 10 48 8d 6b 08 49 89 ec 49 c1 ec RSP: 0018:ffffc90002ebf650 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: ffffc90002ebf780 RCX: ffff88801c32da00 RDX: dffffc0000000000 RSI: ffffffff846254a5 RDI: ffffc90002ebf780 RBP: ffffc90002ebf730 R08: ffffffff8137d242 R09: ffffc90002ebf790 R10: 0000000000000003 R11: ffffffff8181e080 R12: ffff88801c32da00 R13: ffffffff8181e080 R14: ffffc90002ebf780 R15: 1ffff920005d7ef2 arch_stack_walk+0x143/0x1b0 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3966 [inline] __kmalloc+0x233/0x4a0 mm/slub.c:3979 kmalloc include/linux/slab.h:632 [inline] kzalloc include/linux/slab.h:749 [inline] tomoyo_encode2 security/tomoyo/realpath.c:45 [inline] tomoyo_encode+0x26f/0x540 security/tomoyo/realpath.c:80 tomoyo_realpath_from_path+0x59e/0x5e0 security/tomoyo/realpath.c:283 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x23a/0x880 security/tomoyo/file.c:723 security_file_ioctl+0x75/0xb0 security/security.c:2764 __do_sys_ioctl fs/ioctl.c:898 [inline] __se_sys_ioctl+0x47/0x170 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f68c9e7dea9 Code: Unable to access opcode bytes at 0x7f68c9e7de7f. RSP: 002b:00007f68cabc00c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f68c9fabf80 RCX: 00007f68c9e7dea9 RDX: 0000000020000200 RSI: 00000000000089e0 RDI: 0000000000000004 RBP: 00007f68cabc0120 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 000000000000000b R14: 00007f68c9fabf80 R15: 00007fffa463c068 ---------------- Code disassembly (best guess): 0: 41 57 push %r15 2: 41 56 push %r14 4: 41 55 push %r13 6: 41 54 push %r12 8: 53 push %rbx 9: 48 83 ec 18 sub $0x18,%rsp d: 48 89 fb mov %rdi,%rbx 10: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 17: fc ff df 1a: 4c 8d 4f 10 lea 0x10(%rdi),%r9 1e: 4d 89 cf mov %r9,%r15 21: 49 c1 ef 03 shr $0x3,%r15 25: 41 0f b6 04 17 movzbl (%r15,%rdx,1),%eax * 2a: 84 c0 test %al,%al <-- trapping instruction 2c: 0f 85 06 01 00 00 jne 0x138 32: 44 8b 43 10 mov 0x10(%rbx),%r8d 36: 48 8d 6b 08 lea 0x8(%rbx),%rbp 3a: 49 89 ec mov %rbp,%r12 3d: 49 rex.WB 3e: c1 .byte 0xc1 3f: ec in (%dx),%al