loop0: detected capacity change from 0 to 2048 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 0 ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.1031/11298 is trying to acquire lock: ffffffff8e138b80 (console_owner){-.-.}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:317 [inline] ffffffff8e138b80 (console_owner){-.-.}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:428 [inline] ffffffff8e138b80 (console_owner){-.-.}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:291 [inline] ffffffff8e138b80 (console_owner){-.-.}-{0:0}, at: console_flush_one_record kernel/printk/printk.c:3194 [inline] ffffffff8e138b80 (console_owner){-.-.}-{0:0}, at: console_flush_all+0x11a/0xb00 kernel/printk/printk.c:3291 but task is already holding lock: ffff8880b863abe0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xba/0x150 kernel/sched/core.c:655 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+0x32/0x50 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x31/0x150 kernel/sched/core.c:647 raw_spin_rq_lock kernel/sched/sched.h:1613 [inline] _task_rq_lock+0xbc/0x470 kernel/sched/core.c:747 cgroup_move_task+0x92/0x2a0 kernel/sched/psi.c:1170 css_set_move_task+0x658/0x9e0 kernel/cgroup/cgroup.c:948 cgroup_post_fork+0x1ef/0x7a0 kernel/cgroup/cgroup.c:6910 copy_process+0x385e/0x3ba0 kernel/fork.c:2462 kernel_clone+0x21e/0x820 kernel/fork.c:2648 user_mode_thread+0xdd/0x140 kernel/fork.c:2724 rest_init+0x23/0x300 init/main.c:725 start_kernel+0x386/0x3d0 init/main.c:1210 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x147 -> #3 (&p->pi_lock){-.-.}-{2:2}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline] _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162 class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:573 [inline] try_to_wake_up+0x67/0x12c0 kernel/sched/core.c:4129 __wake_up_common kernel/sched/wait.c:108 [inline] __wake_up_common_lock+0x137/0x1f0 kernel/sched/wait.c:125 tty_port_default_wakeup+0xfb/0x170 drivers/tty/tty_port.c:67 serial8250_tx_chars+0x72e/0x970 drivers/tty/serial/8250/8250_port.c:1719 serial8250_handle_irq+0x633/0xbb0 drivers/tty/serial/8250/8250_port.c:1827 serial8250_default_handle_irq+0xbf/0x200 drivers/tty/serial/8250/8250_port.c:1846 serial8250_interrupt+0x8d/0x180 drivers/tty/serial/8250/8250_core.c:86 __handle_irq_event_percpu+0x217/0x970 kernel/irq/handle.c:209 handle_irq_event_percpu kernel/irq/handle.c:246 [inline] handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:263 handle_edge_irq+0x23b/0xa10 kernel/irq/chip.c:855 generic_handle_irq_desc include/linux/irqdesc.h:186 [inline] handle_irq arch/x86/kernel/irq.c:262 [inline] call_irq_handler arch/x86/kernel/irq.c:-1 [inline] __common_interrupt+0x141/0x1f0 arch/x86/kernel/irq.c:333 common_interrupt+0xb6/0xe0 arch/x86/kernel/irq.c:326 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:62 arch_safe_halt arch/x86/kernel/process.c:766 [inline] default_idle+0x9/0x20 arch/x86/kernel/process.c:767 default_idle_call+0x73/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x1be/0x4d0 kernel/sched/idle.c:332 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:430 rest_init+0x2de/0x300 init/main.c:760 start_kernel+0x386/0x3d0 init/main.c:1210 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x147 -> #2 (&tty->write_wait){-.-.}-{3:3}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline] _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162 __wake_up_common_lock+0x2f/0x1f0 kernel/sched/wait.c:124 tty_port_default_wakeup+0xfb/0x170 drivers/tty/tty_port.c:67 serial8250_tx_chars+0x72e/0x970 drivers/tty/serial/8250/8250_port.c:1719 serial8250_handle_irq+0x633/0xbb0 drivers/tty/serial/8250/8250_port.c:1827 serial8250_default_handle_irq+0xbf/0x200 drivers/tty/serial/8250/8250_port.c:1846 serial8250_interrupt+0x8d/0x180 drivers/tty/serial/8250/8250_core.c:86 __handle_irq_event_percpu+0x217/0x970 kernel/irq/handle.c:209 handle_irq_event_percpu kernel/irq/handle.c:246 [inline] handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:263 handle_edge_irq+0x23b/0xa10 kernel/irq/chip.c:855 generic_handle_irq_desc include/linux/irqdesc.h:186 [inline] handle_irq arch/x86/kernel/irq.c:262 [inline] call_irq_handler arch/x86/kernel/irq.c:-1 [inline] __common_interrupt+0x141/0x1f0 arch/x86/kernel/irq.c:333 common_interrupt+0xb6/0xe0 arch/x86/kernel/irq.c:326 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:62 arch_safe_halt arch/x86/kernel/process.c:766 [inline] default_idle+0x9/0x20 arch/x86/kernel/process.c:767 default_idle_call+0x73/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x1be/0x4d0 kernel/sched/idle.c:332 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:430 rest_init+0x2de/0x300 init/main.c:760 start_kernel+0x386/0x3d0 init/main.c:1210 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x147 -> #1 (&port_lock_key){-.-.}-{3:3}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline] _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162 uart_port_lock_irqsave include/linux/serial_core.h:717 [inline] serial8250_console_write+0x155/0x1b60 drivers/tty/serial/8250/8250_port.c:3301 console_emit_next_record kernel/printk/printk.c:3131 [inline] console_flush_one_record kernel/printk/printk.c:3217 [inline] console_flush_all+0x713/0xb00 kernel/printk/printk.c:3291 __console_flush_and_unlock kernel/printk/printk.c:3321 [inline] console_unlock+0xbb/0x190 kernel/printk/printk.c:3361 vprintk_emit+0x47b/0x550 kernel/printk/printk.c:2428 _printk+0xcf/0x120 kernel/printk/printk.c:2453 register_console+0xa8b/0xf90 kernel/printk/printk.c:4172 univ8250_console_init+0x3a/0x70 drivers/tty/serial/8250/8250_core.c:515 console_init+0xfc/0x3f0 kernel/printk/printk.c:4371 start_kernel+0x22c/0x3d0 init/main.c:1147 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x147 -> #0 (console_owner){-.-.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a6/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x107/0x340 kernel/locking/lockdep.c:5868 console_lock_spinning_enable kernel/printk/printk.c:1902 [inline] console_emit_next_record kernel/printk/printk.c:3125 [inline] console_flush_one_record kernel/printk/printk.c:3217 [inline] console_flush_all+0x6bc/0xb00 kernel/printk/printk.c:3291 __console_flush_and_unlock kernel/printk/printk.c:3321 [inline] console_unlock+0xbb/0x190 kernel/printk/printk.c:3361 vprintk_emit+0x47b/0x550 kernel/printk/printk.c:2428 _printk+0xcf/0x120 kernel/printk/printk.c:2453 fail_dump lib/fault-inject.c:66 [inline] should_fail_ex+0x3f5/0x560 lib/fault-inject.c:174 strncpy_from_user+0x36/0x2c0 lib/strncpy_from_user.c:118 strncpy_from_user_nofault+0x72/0x150 mm/maccess.c:192 bpf_trace_copy_string kernel/bpf/helpers.c:755 [inline] bpf_bprintf_prepare+0xbbc/0x13d0 kernel/bpf/helpers.c:976 ____bpf_trace_printk kernel/trace/bpf_trace.c:372 [inline] bpf_trace_printk+0xdb/0x190 kernel/trace/bpf_trace.c:362 bpf_prog_930ede9872f2967c+0x3e/0x44 bpf_dispatcher_nop_func include/linux/bpf.h:1394 [inline] __bpf_prog_run include/linux/filter.h:723 [inline] bpf_prog_run include/linux/filter.h:730 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2075 [inline] bpf_trace_run2+0x284/0x4c0 kernel/trace/bpf_trace.c:2116 __bpf_trace_contention_begin+0xdc/0x130 include/trace/events/lock.h:95 __do_trace_contention_begin include/trace/events/lock.h:95 [inline] trace_contention_begin+0xfe/0x120 include/trace/events/lock.h:95 __pv_queued_spin_lock_slowpath+0xf0/0xad0 kernel/locking/qspinlock.c:219 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:35 [inline] queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:66 [inline] queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x21f/0x290 kernel/locking/spinlock_debug.c:116 raw_spin_rq_lock_nested+0xba/0x150 kernel/sched/core.c:655 raw_spin_rq_lock kernel/sched/sched.h:1613 [inline] rq_lock kernel/sched/sched.h:1943 [inline] __schedule+0x3bf/0x5030 kernel/sched/core.c:6806 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7229 irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 get_freepointer mm/slub.c:598 [inline] get_freepointer_safe mm/slub.c:624 [inline] __slab_alloc_node mm/slub.c:5091 [inline] slab_alloc_node mm/slub.c:5488 [inline] kmem_cache_alloc_noprof+0x16d/0x710 mm/slub.c:5507 alloc_filename fs/namei.c:142 [inline] do_getname+0x2e/0x250 fs/namei.c:182 getname include/linux/fs.h:2512 [inline] class_filename_constructor include/linux/fs.h:2539 [inline] do_sys_openat2+0xbc/0x1e0 fs/open.c:1365 do_sys_open fs/open.c:1372 [inline] __do_sys_creat fs/open.c:1450 [inline] __se_sys_creat fs/open.c:1444 [inline] __x64_sys_creat+0x8f/0xc0 fs/open.c:1444 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 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.0.1031/11298: #0: ffff8880b863abe0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xba/0x150 kernel/sched/core.c:655 #1: ffffffff8e144ce0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline] #1: ffffffff8e144ce0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline] #1: ffffffff8e144ce0 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2074 [inline] #1: ffffffff8e144ce0 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run2+0x186/0x4c0 kernel/trace/bpf_trace.c:2116 #2: ffffffff8e138be0 (console_lock){+.+.}-{0:0}, at: _printk+0xcf/0x120 kernel/printk/printk.c:2453 #3: ffffffff8e020498 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:317 [inline] #3: ffffffff8e020498 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:428 [inline] #3: ffffffff8e020498 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:291 [inline] #3: ffffffff8e020498 (console_srcu){....}-{0:0}, at: console_flush_one_record kernel/printk/printk.c:3194 [inline] #3: ffffffff8e020498 (console_srcu){....}-{0:0}, at: console_flush_all+0x11a/0xb00 kernel/printk/printk.c:3291 stack backtrace: CPU: 0 UID: 0 PID: 11298 Comm: syz.0.1031 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2043 check_noncircular+0x12e/0x150 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a6/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x107/0x340 kernel/locking/lockdep.c:5868 console_lock_spinning_enable kernel/printk/printk.c:1902 [inline] console_emit_next_record kernel/printk/printk.c:3125 [inline] console_flush_one_record kernel/printk/printk.c:3217 [inline] console_flush_all+0x6bc/0xb00 kernel/printk/printk.c:3291 __console_flush_and_unlock kernel/printk/printk.c:3321 [inline] console_unlock+0xbb/0x190 kernel/printk/printk.c:3361 vprintk_emit+0x47b/0x550 kernel/printk/printk.c:2428 _printk+0xcf/0x120 kernel/printk/printk.c:2453 fail_dump lib/fault-inject.c:66 [inline] should_fail_ex+0x3f5/0x560 lib/fault-inject.c:174 strncpy_from_user+0x36/0x2c0 lib/strncpy_from_user.c:118 strncpy_from_user_nofault+0x72/0x150 mm/maccess.c:192 bpf_trace_copy_string kernel/bpf/helpers.c:755 [inline] bpf_bprintf_prepare+0xbbc/0x13d0 kernel/bpf/helpers.c:976 ____bpf_trace_printk kernel/trace/bpf_trace.c:372 [inline] bpf_trace_printk+0xdb/0x190 kernel/trace/bpf_trace.c:362 bpf_prog_930ede9872f2967c+0x3e/0x44 bpf_dispatcher_nop_func include/linux/bpf.h:1394 [inline] __bpf_prog_run include/linux/filter.h:723 [inline] bpf_prog_run include/linux/filter.h:730 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2075 [inline] bpf_trace_run2+0x284/0x4c0 kernel/trace/bpf_trace.c:2116 __bpf_trace_contention_begin+0xdc/0x130 include/trace/events/lock.h:95 __do_trace_contention_begin include/trace/events/lock.h:95 [inline] trace_contention_begin+0xfe/0x120 include/trace/events/lock.h:95 __pv_queued_spin_lock_slowpath+0xf0/0xad0 kernel/locking/qspinlock.c:219 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:35 [inline] queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:66 [inline] queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x21f/0x290 kernel/locking/spinlock_debug.c:116 raw_spin_rq_lock_nested+0xba/0x150 kernel/sched/core.c:655 raw_spin_rq_lock kernel/sched/sched.h:1613 [inline] rq_lock kernel/sched/sched.h:1943 [inline] __schedule+0x3bf/0x5030 kernel/sched/core.c:6806 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7229 irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:next_tid mm/slub.c:3888 [inline] RIP: 0010:__update_cpu_freelist_fast mm/slub.c:4617 [inline] RIP: 0010:__slab_alloc_node mm/slub.c:5107 [inline] RIP: 0010:slab_alloc_node mm/slub.c:5488 [inline] RIP: 0010:kmem_cache_alloc_noprof+0x16d/0x710 mm/slub.c:5507 Code: 02 00 00 48 85 db 0f 84 a9 02 00 00 41 83 f8 ff 74 10 48 8b 03 48 c1 e8 3a 41 39 c0 0f 85 93 02 00 00 41 8b 46 40 4a 8b 1c 28 <49> 8d 4c 24 08 49 8b 36 4c 89 e8 4c 89 e2 65 48 0f c7 0e 74 57 eb RSP: 0018:ffffc90004cc7d18 EFLAGS: 00000246 RAX: 0000000000000060 RBX: ffff88805f304d00 RCX: ffffffff92a48bc0 RDX: 0000000000000000 RSI: 00000000000000c0 RDI: ffffffff8e26dbc0 RBP: 0000000000000cc0 R08: 00000000ffffffff R09: ffffffff8e265c60 R10: ffffc90004cc7e00 R11: fffff52000998fc2 R12: 00000000001661a0 R13: ffff88805f304f00 R14: ffff8881404ba640 R15: ffff888025bedac0 alloc_filename fs/namei.c:142 [inline] do_getname+0x2e/0x250 fs/namei.c:182 getname include/linux/fs.h:2512 [inline] class_filename_constructor include/linux/fs.h:2539 [inline] do_sys_openat2+0xbc/0x1e0 fs/open.c:1365 do_sys_open fs/open.c:1372 [inline] __do_sys_creat fs/open.c:1450 [inline] __se_sys_creat fs/open.c:1444 [inline] __x64_sys_creat+0x8f/0xc0 fs/open.c:1444 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f377d98f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f377e8c2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f377dbe5fa0 RCX: 00007f377d98f749 RDX: 0000000000000000 RSI: 0000000000000182 RDI: 00002000000000c0 RBP: 00007f377e8c2090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f377dbe6038 R14: 00007f377dbe5fa0 R15: 00007ffdf2918b78 CPU: 0 UID: 0 PID: 11298 Comm: syz.0.1031 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 fail_dump lib/fault-inject.c:73 [inline] should_fail_ex+0x414/0x560 lib/fault-inject.c:174 strncpy_from_user+0x36/0x2c0 lib/strncpy_from_user.c:118 strncpy_from_user_nofault+0x72/0x150 mm/maccess.c:192 bpf_trace_copy_string kernel/bpf/helpers.c:755 [inline] bpf_bprintf_prepare+0xbbc/0x13d0 kernel/bpf/helpers.c:976 ____bpf_trace_printk kernel/trace/bpf_trace.c:372 [inline] bpf_trace_printk+0xdb/0x190 kernel/trace/bpf_trace.c:362 bpf_prog_930ede9872f2967c+0x3e/0x44 bpf_dispatcher_nop_func include/linux/bpf.h:1394 [inline] __bpf_prog_run include/linux/filter.h:723 [inline] bpf_prog_run include/linux/filter.h:730 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2075 [inline] bpf_trace_run2+0x284/0x4c0 kernel/trace/bpf_trace.c:2116 __bpf_trace_contention_begin+0xdc/0x130 include/trace/events/lock.h:95 __do_trace_contention_begin include/trace/events/lock.h:95 [inline] trace_contention_begin+0xfe/0x120 include/trace/events/lock.h:95 __pv_queued_spin_lock_slowpath+0xf0/0xad0 kernel/locking/qspinlock.c:219 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:35 [inline] queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:66 [inline] queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x21f/0x290 kernel/locking/spinlock_debug.c:116 raw_spin_rq_lock_nested+0xba/0x150 kernel/sched/core.c:655 raw_spin_rq_lock kernel/sched/sched.h:1613 [inline] rq_lock kernel/sched/sched.h:1943 [inline] __schedule+0x3bf/0x5030 kernel/sched/core.c:6806 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7229 irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:next_tid mm/slub.c:3888 [inline] RIP: 0010:__update_cpu_freelist_fast mm/slub.c:4617 [inline] RIP: 0010:__slab_alloc_node mm/slub.c:5107 [inline] RIP: 0010:slab_alloc_node mm/slub.c:5488 [inline] RIP: 0010:kmem_cache_alloc_noprof+0x16d/0x710 mm/slub.c:5507 Code: 02 00 00 48 85 db 0f 84 a9 02 00 00 41 83 f8 ff 74 10 48 8b 03 48 c1 e8 3a 41 39 c0 0f 85 93 02 00 00 41 8b 46 40 4a 8b 1c 28 <49> 8d 4c 24 08 49 8b 36 4c 89 e8 4c 89 e2 65 48 0f c7 0e 74 57 eb RSP: 0018:ffffc90004cc7d18 EFLAGS: 00000246 RAX: 0000000000000060 RBX: ffff88805f304d00 RCX: ffffffff92a48bc0 RDX: 0000000000000000 RSI: 00000000000000c0 RDI: ffffffff8e26dbc0 RBP: 0000000000000cc0 R08: 00000000ffffffff R09: ffffffff8e265c60 R10: ffffc90004cc7e00 R11: fffff52000998fc2 R12: 00000000001661a0 R13: ffff88805f304f00 R14: ffff8881404ba640 R15: ffff888025bedac0 alloc_filename fs/namei.c:142 [inline] do_getname+0x2e/0x250 fs/namei.c:182 getname include/linux/fs.h:2512 [inline] class_filename_constructor include/linux/fs.h:2539 [inline] do_sys_openat2+0xbc/0x1e0 fs/open.c:1365 do_sys_open fs/open.c:1372 [inline] __do_sys_creat fs/open.c:1450 [inline] __se_sys_creat fs/open.c:1444 [inline] __x64_sys_creat+0x8f/0xc0 fs/open.c:1444 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f377d98f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f377e8c2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f377dbe5fa0 RCX: 00007f377d98f749 RDX: 0000000000000000 RSI: 0000000000000182 RDI: 00002000000000c0 RBP: 00007f377e8c2090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f377dbe6038 R14: 00007f377dbe5fa0 R15: 00007ffdf2918b78 EXT4-fs error (device loop0): ext4_find_dest_de:2050: inode #2: block 16: comm syz.0.1031: bad entry in directory: rec_len is smaller than minimal - offset=0, inode=2, rec_len=8, size=2048 fake=1 ---------------- Code disassembly (best guess): 0: 02 00 add (%rax),%al 2: 00 48 85 add %cl,-0x7b(%rax) 5: db 0f fisttpl (%rdi) 7: 84 a9 02 00 00 41 test %ch,0x41000002(%rcx) d: 83 f8 ff cmp $0xffffffff,%eax 10: 74 10 je 0x22 12: 48 8b 03 mov (%rbx),%rax 15: 48 c1 e8 3a shr $0x3a,%rax 19: 41 39 c0 cmp %eax,%r8d 1c: 0f 85 93 02 00 00 jne 0x2b5 22: 41 8b 46 40 mov 0x40(%r14),%eax 26: 4a 8b 1c 28 mov (%rax,%r13,1),%rbx * 2a: 49 8d 4c 24 08 lea 0x8(%r12),%rcx <-- trapping instruction 2f: 49 8b 36 mov (%r14),%rsi 32: 4c 89 e8 mov %r13,%rax 35: 4c 89 e2 mov %r12,%rdx 38: 65 48 0f c7 0e cmpxchg16b %gs:(%rsi) 3d: 74 57 je 0x96 3f: eb .byte 0xeb