===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 5.2.0-rc7-next-20190701 #26 Not tainted ----------------------------------------------------- syz-executor.2/22263 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: 00000000a5d40467 (&ctx->fd_wqh){....}, at: spin_lock include/linux/spinlock.h:338 [inline] 00000000a5d40467 (&ctx->fd_wqh){....}, at: aio_poll fs/aio.c:1750 [inline] 00000000a5d40467 (&ctx->fd_wqh){....}, at: __io_submit_one fs/aio.c:1824 [inline] 00000000a5d40467 (&ctx->fd_wqh){....}, at: io_submit_one+0xefa/0x2ef0 fs/aio.c:1861 and this task is already holding: 0000000076bed213 (&(&ctx->ctx_lock)->rlock){..-.}, at: spin_lock_irq include/linux/spinlock.h:363 [inline] 0000000076bed213 (&(&ctx->ctx_lock)->rlock){..-.}, at: aio_poll fs/aio.c:1748 [inline] 0000000076bed213 (&(&ctx->ctx_lock)->rlock){..-.}, at: __io_submit_one fs/aio.c:1824 [inline] 0000000076bed213 (&(&ctx->ctx_lock)->rlock){..-.}, at: io_submit_one+0xeb5/0x2ef0 fs/aio.c:1861 which would create a new lock dependency: (&(&ctx->ctx_lock)->rlock){..-.} -> (&ctx->fd_wqh){....} but this new dependency connects a SOFTIRQ-irq-safe lock: ( &(&ctx->ctx_lock)->rlock){..-.} ... which became SOFTIRQ-irq-safe at: lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4413 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x60/0x80 kernel/locking/spinlock.c:167 spin_lock_irq include/linux/spinlock.h:363 [inline] free_ioctx_users+0x2d/0x490 fs/aio.c:620 percpu_ref_put_many include/linux/percpu-refcount.h:293 [inline] percpu_ref_put include/linux/percpu-refcount.h:309 [inline] percpu_ref_call_confirm_rcu lib/percpu-refcount.c:130 [inline] percpu_ref_switch_to_atomic_rcu+0x4c0/0x570 lib/percpu-refcount.c:165 __rcu_reclaim kernel/rcu/rcu.h:222 [inline] rcu_do_batch kernel/rcu/tree.c:2114 [inline] rcu_core+0x67f/0x1580 kernel/rcu/tree.c:2314 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2323 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:537 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1095 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 update_stack_state+0x3a9/0x5f0 arch/x86/kernel/unwind_frame.c:194 unwind_next_frame.part.0+0x1a9/0xa20 arch/x86/kernel/unwind_frame.c:311 unwind_next_frame arch/x86/include/asm/unwind.h:46 [inline] __unwind_start+0x1f6/0x3d0 arch/x86/kernel/unwind_frame.c:410 unwind_start arch/x86/include/asm/unwind.h:60 [inline] arch_stack_walk+0x5e/0xf0 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0xac/0xe0 kernel/stacktrace.c:123 save_stack+0x23/0x90 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_kmalloc mm/kasan/common.c:489 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:462 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:497 slab_post_alloc_hook mm/slab.h:520 [inline] slab_alloc mm/slab.c:3320 [inline] kmem_cache_alloc+0x121/0x710 mm/slab.c:3484 sk_prot_alloc+0x67/0x2e0 net/core/sock.c:1597 sk_alloc+0x39/0xf70 net/core/sock.c:1657 inet6_create net/ipv6/af_inet6.c:180 [inline] inet6_create+0x360/0xf80 net/ipv6/af_inet6.c:107 __sock_create+0x3d8/0x730 net/socket.c:1424 sock_create net/socket.c:1475 [inline] __sys_socket+0x103/0x220 net/socket.c:1517 __do_sys_socket net/socket.c:1526 [inline] __se_sys_socket net/socket.c:1524 [inline] __x64_sys_socket+0x73/0xb0 net/socket.c:1524 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe to a SOFTIRQ-irq-unsafe lock: (&ctx->fault_pending_wqh){+.+.} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4413 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] handle_userfault+0x58e/0x1900 fs/userfaultfd.c:461 do_anonymous_page mm/memory.c:3136 [inline] handle_pte_fault mm/memory.c:3949 [inline] __handle_mm_fault+0x3688/0x3f20 mm/memory.c:4075 handle_mm_fault+0x1b5/0x6b0 mm/memory.c:4112 faultin_page mm/gup.c:655 [inline] __get_user_pages+0x7d4/0x1b50 mm/gup.c:858 __get_user_pages_locked mm/gup.c:1034 [inline] get_user_pages_remote+0x234/0x4b0 mm/gup.c:1174 process_vm_rw_single_vec mm/process_vm_access.c:109 [inline] process_vm_rw_core.isra.0+0x464/0xb10 mm/process_vm_access.c:216 process_vm_rw+0x21f/0x240 mm/process_vm_access.c:284 __do_sys_process_vm_writev mm/process_vm_access.c:306 [inline] __se_sys_process_vm_writev mm/process_vm_access.c:301 [inline] __x64_sys_process_vm_writev+0xe3/0x1a0 mm/process_vm_access.c:301 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: &(&ctx->ctx_lock)->rlock --> &ctx->fd_wqh --> &ctx->fault_pending_wqh Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ctx->fault_pending_wqh); local_irq_disable(); lock(&(&ctx->ctx_lock)->rlock); lock(&ctx->fd_wqh); lock(&(&ctx->ctx_lock)->rlock); *** DEADLOCK *** 1 lock held by syz-executor.2/22263: #0: 0000000076bed213 (&(&ctx->ctx_lock)->rlock){..-.}, at: spin_lock_irq include/linux/spinlock.h:363 [inline] #0: 0000000076bed213 (&(&ctx->ctx_lock)->rlock){..-.}, at: aio_poll fs/aio.c:1748 [inline] #0: 0000000076bed213 (&(&ctx->ctx_lock)->rlock){..-.}, at: __io_submit_one fs/aio.c:1824 [inline] #0: 0000000076bed213 (&(&ctx->ctx_lock)->rlock){..-.}, at: io_submit_one+0xeb5/0x2ef0 fs/aio.c:1861 the dependencies between SOFTIRQ-irq-safe lock and the holding lock: -> (&(&ctx->ctx_lock)->rlock){..-.} { IN-SOFTIRQ-W at: lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4413 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x60/0x80 kernel/locking/spinlock.c:167 spin_lock_irq include/linux/spinlock.h:363 [inline] free_ioctx_users+0x2d/0x490 fs/aio.c:620 percpu_ref_put_many include/linux/percpu-refcount.h:293 [inline] percpu_ref_put include/linux/percpu-refcount.h:309 [inline] percpu_ref_call_confirm_rcu lib/percpu-refcount.c:130 [inline] percpu_ref_switch_to_atomic_rcu+0x4c0/0x570 lib/percpu-refcount.c:165 __rcu_reclaim kernel/rcu/rcu.h:222 [inline] rcu_do_batch kernel/rcu/tree.c:2114 [inline] rcu_core+0x67f/0x1580 kernel/rcu/tree.c:2314 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2323 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:537 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1095 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 update_stack_state+0x3a9/0x5f0 arch/x86/kernel/unwind_frame.c:194 unwind_next_frame.part.0+0x1a9/0xa20 arch/x86/kernel/unwind_frame.c:311 unwind_next_frame arch/x86/include/asm/unwind.h:46 [inline] __unwind_start+0x1f6/0x3d0 arch/x86/kernel/unwind_frame.c:410 unwind_start arch/x86/include/asm/unwind.h:60 [inline] arch_stack_walk+0x5e/0xf0 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0xac/0xe0 kernel/stacktrace.c:123 save_stack+0x23/0x90 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_kmalloc mm/kasan/common.c:489 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:462 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:497 slab_post_alloc_hook mm/slab.h:520 [inline] slab_alloc mm/slab.c:3320 [inline] kmem_cache_alloc+0x121/0x710 mm/slab.c:3484 sk_prot_alloc+0x67/0x2e0 net/core/sock.c:1597 sk_alloc+0x39/0xf70 net/core/sock.c:1657 inet6_create net/ipv6/af_inet6.c:180 [inline] inet6_create+0x360/0xf80 net/ipv6/af_inet6.c:107 __sock_create+0x3d8/0x730 net/socket.c:1424 sock_create net/socket.c:1475 [inline] __sys_socket+0x103/0x220 net/socket.c:1517 __do_sys_socket net/socket.c:1526 [inline] __se_sys_socket net/socket.c:1524 [inline] __x64_sys_socket+0x73/0xb0 net/socket.c:1524 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe INITIAL USE at: lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4413 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x60/0x80 kernel/locking/spinlock.c:167 spin_lock_irq include/linux/spinlock.h:363 [inline] free_ioctx_users+0x2d/0x490 fs/aio.c:620 percpu_ref_put_many include/linux/percpu-refcount.h:293 [inline] percpu_ref_put include/linux/percpu-refcount.h:309 [inline] percpu_ref_call_confirm_rcu lib/percpu-refcount.c:130 [inline] percpu_ref_switch_to_atomic_rcu+0x4c0/0x570 lib/percpu-refcount.c:165 __rcu_reclaim kernel/rcu/rcu.h:222 [inline] rcu_do_batch kernel/rcu/tree.c:2114 [inline] rcu_core+0x67f/0x1580 kernel/rcu/tree.c:2314 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2323 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:537 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1095 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 update_stack_state+0x3a9/0x5f0 arch/x86/kernel/unwind_frame.c:194 unwind_next_frame.part.0+0x1a9/0xa20 arch/x86/kernel/unwind_frame.c:311 unwind_next_frame arch/x86/include/asm/unwind.h:46 [inline] __unwind_start+0x1f6/0x3d0 arch/x86/kernel/unwind_frame.c:410 unwind_start arch/x86/include/asm/unwind.h:60 [inline] arch_stack_walk+0x5e/0xf0 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0xac/0xe0 kernel/stacktrace.c:123 save_stack+0x23/0x90 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_kmalloc mm/kasan/common.c:489 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:462 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:497 slab_post_alloc_hook mm/slab.h:520 [inline] slab_alloc mm/slab.c:3320 [inline] kmem_cache_alloc+0x121/0x710 mm/slab.c:3484 sk_prot_alloc+0x67/0x2e0 net/core/sock.c:1597 sk_alloc+0x39/0xf70 net/core/sock.c:1657 inet6_create net/ipv6/af_inet6.c:180 [inline] inet6_create+0x360/0xf80 net/ipv6/af_inet6.c:107 __sock_create+0x3d8/0x730 net/socket.c:1424 sock_create net/socket.c:1475 [inline] __sys_socket+0x103/0x220 net/socket.c:1517 __do_sys_socket net/socket.c:1526 [inline] __se_sys_socket net/socket.c:1524 [inline] __x64_sys_socket+0x73/0xb0 net/socket.c:1524 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe } ... key at: [] __key.53851+0x0/0x40 ... acquired at: lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4413 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] aio_poll fs/aio.c:1750 [inline] __io_submit_one fs/aio.c:1824 [inline] io_submit_one+0xefa/0x2ef0 fs/aio.c:1861 __do_sys_io_submit fs/aio.c:1920 [inline] __se_sys_io_submit fs/aio.c:1890 [inline] __x64_sys_io_submit+0x1bd/0x570 fs/aio.c:1890 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (&ctx->fault_pending_wqh){+.+.} { HARDIRQ-ON-W at: lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4413 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] handle_userfault+0x58e/0x1900 fs/userfaultfd.c:461 do_anonymous_page mm/memory.c:3136 [inline] handle_pte_fault mm/memory.c:3949 [inline] __handle_mm_fault+0x3688/0x3f20 mm/memory.c:4075 handle_mm_fault+0x1b5/0x6b0 mm/memory.c:4112 faultin_page mm/gup.c:655 [inline] __get_user_pages+0x7d4/0x1b50 mm/gup.c:858 __get_user_pages_locked mm/gup.c:1034 [inline] get_user_pages_remote+0x234/0x4b0 mm/gup.c:1174 process_vm_rw_single_vec mm/process_vm_access.c:109 [inline] process_vm_rw_core.isra.0+0x464/0xb10 mm/process_vm_access.c:216 process_vm_rw+0x21f/0x240 mm/process_vm_access.c:284 __do_sys_process_vm_writev mm/process_vm_access.c:306 [inline] __se_sys_process_vm_writev mm/process_vm_access.c:301 [inline] __x64_sys_process_vm_writev+0xe3/0x1a0 mm/process_vm_access.c:301 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe SOFTIRQ-ON-W at: lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4413 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] handle_userfault+0x58e/0x1900 fs/userfaultfd.c:461 do_anonymous_page mm/memory.c:3136 [inline] handle_pte_fault mm/memory.c:3949 [inline] __handle_mm_fault+0x3688/0x3f20 mm/memory.c:4075 handle_mm_fault+0x1b5/0x6b0 mm/memory.c:4112 faultin_page mm/gup.c:655 [inline] __get_user_pages+0x7d4/0x1b50 mm/gup.c:858 __get_user_pages_locked mm/gup.c:1034 [inline] get_user_pages_remote+0x234/0x4b0 mm/gup.c:1174 process_vm_rw_single_vec mm/process_vm_access.c:109 [inline] process_vm_rw_core.isra.0+0x464/0xb10 mm/process_vm_access.c:216 process_vm_rw+0x21f/0x240 mm/process_vm_access.c:284 __do_sys_process_vm_writev mm/process_vm_access.c:306 [inline] __se_sys_process_vm_writev mm/process_vm_access.c:301 [inline] __x64_sys_process_vm_writev+0xe3/0x1a0 mm/process_vm_access.c:301 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe INITIAL USE at: lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4413 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] handle_userfault+0x58e/0x1900 fs/userfaultfd.c:461 do_anonymous_page mm/memory.c:3136 [inline] handle_pte_fault mm/memory.c:3949 [inline] __handle_mm_fault+0x3688/0x3f20 mm/memory.c:4075 handle_mm_fault+0x1b5/0x6b0 mm/memory.c:4112 faultin_page mm/gup.c:655 [inline] __get_user_pages+0x7d4/0x1b50 mm/gup.c:858 __get_user_pages_locked mm/gup.c:1034 [inline] get_user_pages_remote+0x234/0x4b0 mm/gup.c:1174 process_vm_rw_single_vec mm/process_vm_access.c:109 [inline] process_vm_rw_core.isra.0+0x464/0xb10 mm/process_vm_access.c:216 process_vm_rw+0x21f/0x240 mm/process_vm_access.c:284 __do_sys_process_vm_writev mm/process_vm_access.c:306 [inline] __se_sys_process_vm_writev mm/process_vm_access.c:301 [inline] __x64_sys_process_vm_writev+0xe3/0x1a0 mm/process_vm_access.c:301 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe } ... key at: [] __key.46564+0x0/0x40 ... acquired at: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] userfaultfd_ctx_read fs/userfaultfd.c:1045 [inline] userfaultfd_read+0x54d/0x1940 fs/userfaultfd.c:1203 __vfs_read+0x8a/0x110 fs/read_write.c:425 vfs_read+0x1f0/0x440 fs/read_write.c:461 ksys_read+0x14f/0x290 fs/read_write.c:587 __do_sys_read fs/read_write.c:597 [inline] __se_sys_read fs/read_write.c:595 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:595 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> (&ctx->fd_wqh){....} { INITIAL USE at: lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4413 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:159 __wake_up_common_lock+0xc8/0x150 kernel/sched/wait.c:122 __wake_up+0xe/0x10 kernel/sched/wait.c:142 handle_userfault+0x932/0x1900 fs/userfaultfd.c:487 do_anonymous_page mm/memory.c:3136 [inline] handle_pte_fault mm/memory.c:3949 [inline] __handle_mm_fault+0x3688/0x3f20 mm/memory.c:4075 handle_mm_fault+0x1b5/0x6b0 mm/memory.c:4112 faultin_page mm/gup.c:655 [inline] __get_user_pages+0x7d4/0x1b50 mm/gup.c:858 __get_user_pages_locked mm/gup.c:1034 [inline] get_user_pages_remote+0x234/0x4b0 mm/gup.c:1174 process_vm_rw_single_vec mm/process_vm_access.c:109 [inline] process_vm_rw_core.isra.0+0x464/0xb10 mm/process_vm_access.c:216 process_vm_rw+0x21f/0x240 mm/process_vm_access.c:284 __do_sys_process_vm_writev mm/process_vm_access.c:306 [inline] __se_sys_process_vm_writev mm/process_vm_access.c:301 [inline] __x64_sys_process_vm_writev+0xe3/0x1a0 mm/process_vm_access.c:301 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe } ... key at: [] __key.46567+0x0/0x40 ... acquired at: lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4413 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] aio_poll fs/aio.c:1750 [inline] __io_submit_one fs/aio.c:1824 [inline] io_submit_one+0xefa/0x2ef0 fs/aio.c:1861 __do_sys_io_submit fs/aio.c:1920 [inline] __se_sys_io_submit fs/aio.c:1890 [inline] __x64_sys_io_submit+0x1bd/0x570 fs/aio.c:1890 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe stack backtrace: CPU: 1 PID: 22263 Comm: syz-executor.2 Not tainted 5.2.0-rc7-next-20190701 #26 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+0x172/0x1f0 lib/dump_stack.c:113 print_bad_irq_dependency kernel/locking/lockdep.c:2025 [inline] check_irq_usage.cold+0x5b4/0x72e kernel/locking/lockdep.c:2223 check_prev_add kernel/locking/lockdep.c:2409 [inline] check_prevs_add kernel/locking/lockdep.c:2507 [inline] validate_chain kernel/locking/lockdep.c:2897 [inline] __lock_acquire+0x25bd/0x4c20 kernel/locking/lockdep.c:3880 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4413 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] aio_poll fs/aio.c:1750 [inline] __io_submit_one fs/aio.c:1824 [inline] io_submit_one+0xefa/0x2ef0 fs/aio.c:1861 __do_sys_io_submit fs/aio.c:1920 [inline] __se_sys_io_submit fs/aio.c:1890 [inline] __x64_sys_io_submit+0x1bd/0x570 fs/aio.c:1890 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459519 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f41e7229c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459519 RDX: 0000000020000600 RSI: 0000000000000001 RDI: 00007f41e7209000 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f41e722a6d4 R13: 00000000004c0898 R14: 00000000004d3548 R15: 00000000ffffffff