===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 4.17.0-rc1+ #12 Not tainted ----------------------------------------------------- syz-executor1/7298 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: (ptrval) (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.82+0x0/0x30 mm/page_alloc.c:463 and this task is already holding: (ptrval) (&(&dev->event_lock)->rlock){-...}, at: input_inject_event+0xe0/0x3ed drivers/input/input.c:461 which would create a new lock dependency: (&(&dev->event_lock)->rlock){-...} -> (fs_reclaim){+.+.} but this new dependency connects a HARDIRQ-irq-safe lock: (&(&dev->event_lock)->rlock){-...} ... which became HARDIRQ-irq-safe at: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 input_event+0x67/0xa0 drivers/input/input.c:435 input_report_key include/linux/input.h:393 [inline] psmouse_report_standard_buttons+0x31/0x90 drivers/input/mouse/psmouse-base.c:127 psmouse_report_standard_packet drivers/input/mouse/psmouse-base.c:145 [inline] psmouse_process_byte+0x1ef/0x710 drivers/input/mouse/psmouse-base.c:236 psmouse_handle_byte+0x4a/0x570 drivers/input/mouse/psmouse-base.c:278 psmouse_interrupt+0x38a/0x1420 drivers/input/mouse/psmouse-base.c:428 serio_interrupt+0x98/0x160 drivers/input/serio/serio.c:1018 i8042_interrupt+0x385/0x5e0 drivers/input/serio/i8042.c:586 __handle_irq_event_percpu+0x1c0/0xad0 kernel/irq/handle.c:149 handle_irq_event_percpu+0x98/0x1c0 kernel/irq/handle.c:189 handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206 handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:791 generic_handle_irq_desc include/linux/irqdesc.h:159 [inline] handle_irq+0x18c/0x2e7 arch/x86/kernel/irq_64.c:77 do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:245 ret_from_intr+0x0/0x1e on_stack arch/x86/include/asm/stacktrace.h:42 [inline] update_stack_state+0x1f2/0x670 arch/x86/kernel/unwind_frame.c:238 unwind_next_frame.part.7+0x1a9/0x9c0 arch/x86/kernel/unwind_frame.c:329 unwind_next_frame+0x3e/0x50 arch/x86/kernel/unwind_frame.c:287 __save_stack_trace+0x6e/0xd0 arch/x86/kernel/stacktrace.c:44 save_stack_trace+0x1a/0x20 arch/x86/kernel/stacktrace.c:60 save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 __do_kmalloc mm/slab.c:3718 [inline] __kmalloc+0x14e/0x760 mm/slab.c:3727 kmalloc include/linux/slab.h:517 [inline] kzalloc include/linux/slab.h:701 [inline] new_dir fs/proc/proc_sysctl.c:939 [inline] get_subdir fs/proc/proc_sysctl.c:984 [inline] __register_sysctl_table+0x8d1/0x1040 fs/proc/proc_sysctl.c:1327 register_net_sysctl+0x29/0x30 net/sysctl_net.c:120 neigh_sysctl_register+0x399/0x730 net/core/neighbour.c:3246 addrconf_sysctl_register+0xb9/0x1e0 net/ipv6/addrconf.c:6511 ipv6_add_dev+0xb35/0x1380 net/ipv6/addrconf.c:448 addrconf_notify+0x9d4/0x2580 net/ipv6/addrconf.c:3406 call_netdevice_notifier net/core/dev.c:1602 [inline] register_netdevice_notifier+0x222/0x8f0 net/core/dev.c:1638 addrconf_init+0x175/0x398 net/ipv6/addrconf.c:6661 inet6_init+0x39a/0x706 net/ipv6/af_inet6.c:997 do_one_initcall+0x127/0x913 init/main.c:883 do_initcall_level init/main.c:951 [inline] do_initcalls init/main.c:959 [inline] do_basic_setup init/main.c:977 [inline] kernel_init_freeable+0x49b/0x58e init/main.c:1127 kernel_init+0x11/0x1b3 init/main.c:1053 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 to a HARDIRQ-irq-unsafe lock: (fs_reclaim){+.+.} ... which became HARDIRQ-irq-unsafe at: ... lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 fs_reclaim_acquire.part.82+0x24/0x30 mm/page_alloc.c:3739 fs_reclaim_acquire+0x14/0x20 mm/page_alloc.c:3740 slab_pre_alloc_hook mm/slab.h:418 [inline] slab_alloc_node mm/slab.c:3299 [inline] kmem_cache_alloc_node_trace+0x39/0x770 mm/slab.c:3661 kmalloc_node include/linux/slab.h:550 [inline] kzalloc_node include/linux/slab.h:712 [inline] alloc_worker+0xbd/0x2e0 kernel/workqueue.c:1704 init_rescuer.part.25+0x1f/0x190 kernel/workqueue.c:4000 init_rescuer kernel/workqueue.c:3997 [inline] workqueue_init+0x51f/0x7d0 kernel/workqueue.c:5732 kernel_init_freeable+0x2ad/0x58e init/main.c:1115 kernel_init+0x11/0x1b3 init/main.c:1053 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(fs_reclaim); local_irq_disable(); lock(&(&dev->event_lock)->rlock); lock(fs_reclaim); lock(&(&dev->event_lock)->rlock); *** DEADLOCK *** 3 locks held by syz-executor1/7298: #0: (ptrval) (&evdev->mutex){+.+.}, at: evdev_write+0x1cc/0x860 drivers/input/evdev.c:543 #1: (ptrval) (&(&dev->event_lock)->rlock){-...}, at: input_inject_event+0xe0/0x3ed drivers/input/input.c:461 #2: (ptrval) (rcu_read_lock){....}, at: is_event_supported drivers/input/input.c:56 [inline] #2: (ptrval) (rcu_read_lock){....}, at: input_inject_event+0xc5/0x3ed drivers/input/input.c:460 the dependencies between HARDIRQ-irq-safe lock and the holding lock: -> (&(&dev->event_lock)->rlock){-...} ops: 9 { IN-HARDIRQ-W at: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 input_event+0x67/0xa0 drivers/input/input.c:435 input_report_key include/linux/input.h:393 [inline] psmouse_report_standard_buttons+0x31/0x90 drivers/input/mouse/psmouse-base.c:127 psmouse_report_standard_packet drivers/input/mouse/psmouse-base.c:145 [inline] psmouse_process_byte+0x1ef/0x710 drivers/input/mouse/psmouse-base.c:236 psmouse_handle_byte+0x4a/0x570 drivers/input/mouse/psmouse-base.c:278 psmouse_interrupt+0x38a/0x1420 drivers/input/mouse/psmouse-base.c:428 serio_interrupt+0x98/0x160 drivers/input/serio/serio.c:1018 i8042_interrupt+0x385/0x5e0 drivers/input/serio/i8042.c:586 __handle_irq_event_percpu+0x1c0/0xad0 kernel/irq/handle.c:149 handle_irq_event_percpu+0x98/0x1c0 kernel/irq/handle.c:189 handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206 handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:791 generic_handle_irq_desc include/linux/irqdesc.h:159 [inline] handle_irq+0x18c/0x2e7 arch/x86/kernel/irq_64.c:77 do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:245 ret_from_intr+0x0/0x1e on_stack arch/x86/include/asm/stacktrace.h:42 [inline] update_stack_state+0x1f2/0x670 arch/x86/kernel/unwind_frame.c:238 unwind_next_frame.part.7+0x1a9/0x9c0 arch/x86/kernel/unwind_frame.c:329 unwind_next_frame+0x3e/0x50 arch/x86/kernel/unwind_frame.c:287 __save_stack_trace+0x6e/0xd0 arch/x86/kernel/stacktrace.c:44 save_stack_trace+0x1a/0x20 arch/x86/kernel/stacktrace.c:60 save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 __do_kmalloc mm/slab.c:3718 [inline] __kmalloc+0x14e/0x760 mm/slab.c:3727 kmalloc include/linux/slab.h:517 [inline] kzalloc include/linux/slab.h:701 [inline] new_dir fs/proc/proc_sysctl.c:939 [inline] get_subdir fs/proc/proc_sysctl.c:984 [inline] __register_sysctl_table+0x8d1/0x1040 fs/proc/proc_sysctl.c:1327 register_net_sysctl+0x29/0x30 net/sysctl_net.c:120 neigh_sysctl_register+0x399/0x730 net/core/neighbour.c:3246 addrconf_sysctl_register+0xb9/0x1e0 net/ipv6/addrconf.c:6511 ipv6_add_dev+0xb35/0x1380 net/ipv6/addrconf.c:448 addrconf_notify+0x9d4/0x2580 net/ipv6/addrconf.c:3406 call_netdevice_notifier net/core/dev.c:1602 [inline] register_netdevice_notifier+0x222/0x8f0 net/core/dev.c:1638 addrconf_init+0x175/0x398 net/ipv6/addrconf.c:6661 inet6_init+0x39a/0x706 net/ipv6/af_inet6.c:997 do_one_initcall+0x127/0x913 init/main.c:883 do_initcall_level init/main.c:951 [inline] do_initcalls init/main.c:959 [inline] do_basic_setup init/main.c:977 [inline] kernel_init_freeable+0x49b/0x58e init/main.c:1127 kernel_init+0x11/0x1b3 init/main.c:1053 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 INITIAL USE at: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 input_inject_event+0xe0/0x3ed drivers/input/input.c:461 input_leds_brightness_set+0x81/0xb0 drivers/input/input-leds.c:66 __led_set_brightness drivers/leds/led-core.c:34 [inline] led_set_brightness_nopm+0x4c/0xe0 drivers/leds/led-core.c:261 led_set_brightness_nosleep drivers/leds/led-core.c:278 [inline] led_set_brightness+0x113/0x220 drivers/leds/led-core.c:253 led_trigger_event+0x77/0xd0 drivers/leds/led-triggers.c:292 kbd_led_trigger_activate+0xed/0x120 drivers/tty/vt/keyboard.c:969 led_trigger_set+0x668/0x930 drivers/leds/led-triggers.c:138 led_trigger_set_default+0x10a/0x180 drivers/leds/led-triggers.c:171 of_led_classdev_register+0x485/0x640 drivers/leds/led-class.c:302 input_leds_connect+0x410/0x7c0 drivers/input/input-leds.c:143 input_attach_handler+0x1b1/0x210 drivers/input/input.c:996 input_register_device.cold.22+0xe8/0x297 drivers/input/input.c:2152 atkbd_connect+0x6fe/0x930 drivers/input/keyboard/atkbd.c:1200 serio_connect_driver+0x4f/0x70 drivers/input/serio/serio.c:63 serio_driver_probe+0x47/0x60 drivers/input/serio/serio.c:794 really_probe drivers/base/dd.c:448 [inline] driver_probe_device+0x69b/0x960 drivers/base/dd.c:590 __driver_attach+0x1b2/0x1f0 drivers/base/dd.c:824 bus_for_each_dev+0x151/0x1d0 drivers/base/bus.c:311 driver_attach+0x3d/0x50 drivers/base/dd.c:843 serio_attach_driver drivers/input/serio/serio.c:824 [inline] serio_handle_event+0x70a/0xb20 drivers/input/serio/serio.c:243 process_one_work+0xc1e/0x1b50 kernel/workqueue.c:2145 worker_thread+0x1cc/0x1440 kernel/workqueue.c:2279 kthread+0x345/0x410 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 } ... key at: [] __key.33448+0x0/0x40 ... acquired at: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 fs_reclaim_acquire.part.82+0x24/0x30 mm/page_alloc.c:3739 fs_reclaim_acquire+0x14/0x20 mm/page_alloc.c:3740 slab_pre_alloc_hook mm/slab.h:418 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3716 [inline] __kmalloc+0x45/0x760 mm/slab.c:3727 kmalloc_array include/linux/slab.h:631 [inline] kcalloc include/linux/slab.h:642 [inline] numa_crng_init drivers/char/random.c:798 [inline] crng_reseed+0x427/0x920 drivers/char/random.c:923 credit_entropy_bits+0x98d/0xa30 drivers/char/random.c:708 add_timer_randomness+0x26b/0x320 drivers/char/random.c:1133 add_input_randomness+0xce/0x3e0 drivers/char/random.c:1148 input_handle_event+0xb3/0x1210 drivers/input/input.c:375 input_inject_event+0x367/0x3ed drivers/input/input.c:466 evdev_write+0x4d1/0x860 drivers/input/evdev.c:560 __vfs_write+0x10b/0x960 fs/read_write.c:485 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0xf9/0x250 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: -> (fs_reclaim){+.+.} ops: 1928177 { HARDIRQ-ON-W at: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 fs_reclaim_acquire.part.82+0x24/0x30 mm/page_alloc.c:3739 fs_reclaim_acquire+0x14/0x20 mm/page_alloc.c:3740 slab_pre_alloc_hook mm/slab.h:418 [inline] slab_alloc_node mm/slab.c:3299 [inline] kmem_cache_alloc_node_trace+0x39/0x770 mm/slab.c:3661 kmalloc_node include/linux/slab.h:550 [inline] kzalloc_node include/linux/slab.h:712 [inline] alloc_worker+0xbd/0x2e0 kernel/workqueue.c:1704 init_rescuer.part.25+0x1f/0x190 kernel/workqueue.c:4000 init_rescuer kernel/workqueue.c:3997 [inline] workqueue_init+0x51f/0x7d0 kernel/workqueue.c:5732 kernel_init_freeable+0x2ad/0x58e init/main.c:1115 kernel_init+0x11/0x1b3 init/main.c:1053 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 SOFTIRQ-ON-W at: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 fs_reclaim_acquire.part.82+0x24/0x30 mm/page_alloc.c:3739 fs_reclaim_acquire+0x14/0x20 mm/page_alloc.c:3740 slab_pre_alloc_hook mm/slab.h:418 [inline] slab_alloc_node mm/slab.c:3299 [inline] kmem_cache_alloc_node_trace+0x39/0x770 mm/slab.c:3661 kmalloc_node include/linux/slab.h:550 [inline] kzalloc_node include/linux/slab.h:712 [inline] alloc_worker+0xbd/0x2e0 kernel/workqueue.c:1704 init_rescuer.part.25+0x1f/0x190 kernel/workqueue.c:4000 init_rescuer kernel/workqueue.c:3997 [inline] workqueue_init+0x51f/0x7d0 kernel/workqueue.c:5732 kernel_init_freeable+0x2ad/0x58e init/main.c:1115 kernel_init+0x11/0x1b3 init/main.c:1053 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 INITIAL USE at: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 fs_reclaim_acquire.part.82+0x24/0x30 mm/page_alloc.c:3739 fs_reclaim_acquire+0x14/0x20 mm/page_alloc.c:3740 slab_pre_alloc_hook mm/slab.h:418 [inline] slab_alloc_node mm/slab.c:3299 [inline] kmem_cache_alloc_node_trace+0x39/0x770 mm/slab.c:3661 kmalloc_node include/linux/slab.h:550 [inline] kzalloc_node include/linux/slab.h:712 [inline] alloc_worker+0xbd/0x2e0 kernel/workqueue.c:1704 init_rescuer.part.25+0x1f/0x190 kernel/workqueue.c:4000 init_rescuer kernel/workqueue.c:3997 [inline] workqueue_init+0x51f/0x7d0 kernel/workqueue.c:5732 kernel_init_freeable+0x2ad/0x58e init/main.c:1115 kernel_init+0x11/0x1b3 init/main.c:1053 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 } ... key at: [] __fs_reclaim_map+0x0/0x40 ... acquired at: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 fs_reclaim_acquire.part.82+0x24/0x30 mm/page_alloc.c:3739 fs_reclaim_acquire+0x14/0x20 mm/page_alloc.c:3740 slab_pre_alloc_hook mm/slab.h:418 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3716 [inline] __kmalloc+0x45/0x760 mm/slab.c:3727 kmalloc_array include/linux/slab.h:631 [inline] kcalloc include/linux/slab.h:642 [inline] numa_crng_init drivers/char/random.c:798 [inline] crng_reseed+0x427/0x920 drivers/char/random.c:923 credit_entropy_bits+0x98d/0xa30 drivers/char/random.c:708 add_timer_randomness+0x26b/0x320 drivers/char/random.c:1133 add_input_randomness+0xce/0x3e0 drivers/char/random.c:1148 input_handle_event+0xb3/0x1210 drivers/input/input.c:375 input_inject_event+0x367/0x3ed drivers/input/input.c:466 evdev_write+0x4d1/0x860 drivers/input/evdev.c:560 __vfs_write+0x10b/0x960 fs/read_write.c:485 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0xf9/0x250 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe stack backtrace: CPU: 1 PID: 7298 Comm: syz-executor1 Not tainted 4.17.0-rc1+ #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 print_bad_irq_dependency kernel/locking/lockdep.c:1570 [inline] check_usage.cold.58+0x6d5/0xac7 kernel/locking/lockdep.c:1602 check_irq_usage kernel/locking/lockdep.c:1658 [inline] check_prev_add_irq kernel/locking/lockdep_states.h:7 [inline] check_prev_add kernel/locking/lockdep.c:1868 [inline] check_prevs_add kernel/locking/lockdep.c:1976 [inline] validate_chain kernel/locking/lockdep.c:2417 [inline] __lock_acquire+0x2417/0x5140 kernel/locking/lockdep.c:3431 lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 fs_reclaim_acquire.part.82+0x24/0x30 mm/page_alloc.c:3739 fs_reclaim_acquire+0x14/0x20 mm/page_alloc.c:3740 slab_pre_alloc_hook mm/slab.h:418 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3716 [inline] __kmalloc+0x45/0x760 mm/slab.c:3727 kmalloc_array include/linux/slab.h:631 [inline] kcalloc include/linux/slab.h:642 [inline] numa_crng_init drivers/char/random.c:798 [inline] crng_reseed+0x427/0x920 drivers/char/random.c:923 credit_entropy_bits+0x98d/0xa30 drivers/char/random.c:708 add_timer_randomness+0x26b/0x320 drivers/char/random.c:1133 add_input_randomness+0xce/0x3e0 drivers/char/random.c:1148 input_handle_event+0xb3/0x1210 drivers/input/input.c:375 input_inject_event+0x367/0x3ed drivers/input/input.c:466 evdev_write+0x4d1/0x860 drivers/input/evdev.c:560 __vfs_write+0x10b/0x960 fs/read_write.c:485 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0xf9/0x250 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455389 RSP: 002b:00007f6b795c0c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f6b795c16d4 RCX: 0000000000455389 RDX: 0000000000000030 RSI: 0000000020000040 RDI: 0000000000000015 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000006cb R14: 00000000006fd3a8 R15: 0000000000000000 BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 1, pid: 7298, name: syz-executor1 INFO: lockdep is turned off. irq event stamp: 452 hardirqs last enabled at (451): [] do_syscall_64+0x92/0x800 arch/x86/entry/common.c:274 hardirqs last disabled at (452): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (452): [] _raw_spin_lock_irqsave+0x74/0xc0 kernel/locking/spinlock.c:152 softirqs last enabled at (280): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (247): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (247): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 7298 Comm: syz-executor1 Not tainted 4.17.0-rc1+ #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 ___might_sleep.cold.87+0x11f/0x13a kernel/sched/core.c:6188 __might_sleep+0x95/0x190 kernel/sched/core.c:6141 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3716 [inline] __kmalloc+0x2b9/0x760 mm/slab.c:3727 kmalloc_array include/linux/slab.h:631 [inline] kcalloc include/linux/slab.h:642 [inline] numa_crng_init drivers/char/random.c:798 [inline] crng_reseed+0x427/0x920 drivers/char/random.c:923 credit_entropy_bits+0x98d/0xa30 drivers/char/random.c:708 add_timer_randomness+0x26b/0x320 drivers/char/random.c:1133 add_input_randomness+0xce/0x3e0 drivers/char/random.c:1148 input_handle_event+0xb3/0x1210 drivers/input/input.c:375 input_inject_event+0x367/0x3ed drivers/input/input.c:466 evdev_write+0x4d1/0x860 drivers/input/evdev.c:560 __vfs_write+0x10b/0x960 fs/read_write.c:485 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0xf9/0x250 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455389 RSP: 002b:00007f6b795c0c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f6b795c16d4 RCX: 0000000000455389 RDX: 0000000000000030 RSI: 0000000020000040 RDI: 0000000000000015 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000006cb R14: 00000000006fd3a8 R15: 0000000000000000 random: crng init done binder_alloc: binder_alloc_mmap_handler: 7346 20000000-20001000 already mapped failed -16 capability: warning: `syz-executor1' uses 32-bit capabilities (legacy support in use) IPVS: set_ctl: invalid protocol: 115 172.20.20.16:20002 lblc kernel msg: ebtables bug: please report to author: NOPROTO & 802_3 not allowed IPVS: set_ctl: invalid protocol: 115 172.20.20.16:20002 lblc syz-executor0 uses obsolete (PF_INET,SOCK_PACKET) kernel msg: ebtables bug: please report to author: NOPROTO & 802_3 not allowed binder: 7505:7506 ioctl c0306201 2000a000 returned -14 binder: 7505:7506 got transaction with invalid handle, 0 binder: 7505:7506 transaction failed 29201/-22, size 56-8 line 3055 binder_alloc: binder_alloc_mmap_handler: 7505 20000000-20002000 already mapped failed -16 BTRFS: device fsid ecf6f2a3-2997-48ae-b81e-1b00920efd9a devid 1 transid 5 /dev/loop1 binder: BINDER_SET_CONTEXT_MGR already set binder: 7505:7506 ioctl 40046207 0 returned -16 binder: 7505:7526 ioctl c0306201 2000a000 returned -14 binder: undelivered TRANSACTION_ERROR: 29201 netlink: 16 bytes leftover after parsing attributes in process `syz-executor1'. bond0: cannot enslave bond to itself. netlink: 16 bytes leftover after parsing attributes in process `syz-executor1'. bond0: cannot enslave bond to itself. IPVS: length: 12 != 8 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 mmap: syz-executor6 (7746) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt.