===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 4.19.51 #23 Not tainted ----------------------------------------------------- syz-executor.5/14298 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: kobject: 'loop3' (0000000068df1185): kobject_uevent_env 0000000036e8ae5d (&ctx->fault_pending_wqh){+.+.}, at: spin_lock include/linux/spinlock.h:329 [inline] 0000000036e8ae5d (&ctx->fault_pending_wqh){+.+.}, at: userfaultfd_ctx_read fs/userfaultfd.c:1046 [inline] 0000000036e8ae5d (&ctx->fault_pending_wqh){+.+.}, at: userfaultfd_read+0x394/0x18c0 fs/userfaultfd.c:1204 and this task is already holding: 00000000cce4d32c (&ctx->fd_wqh){....}, at: spin_lock_irq include/linux/spinlock.h:354 [inline] 00000000cce4d32c (&ctx->fd_wqh){....}, at: userfaultfd_ctx_read fs/userfaultfd.c:1042 [inline] 00000000cce4d32c (&ctx->fd_wqh){....}, at: userfaultfd_read+0x262/0x18c0 fs/userfaultfd.c:1204 kobject: 'loop3' (0000000068df1185): fill_kobj_path: path = '/devices/virtual/block/loop3' which would create a new lock dependency: (&ctx->fd_wqh){....} -> (&ctx->fault_pending_wqh){+.+.} but this new dependency connects a SOFTIRQ-irq-safe lock: (&(&ctx->ctx_lock)->rlock){..-.} ... which became SOFTIRQ-irq-safe at: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3900 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x60/0x80 kernel/locking/spinlock.c:160 spin_lock_irq include/linux/spinlock.h:354 [inline] free_ioctx_users+0x2d/0x490 fs/aio.c:614 percpu_ref_put_many include/linux/percpu-refcount.h:284 [inline] percpu_ref_put include/linux/percpu-refcount.h:300 [inline] percpu_ref_call_confirm_rcu lib/percpu-refcount.c:123 [inline] percpu_ref_switch_to_atomic_rcu+0x407/0x540 lib/percpu-refcount.c:158 __rcu_reclaim kernel/rcu/rcu.h:236 [inline] rcu_do_batch kernel/rcu/tree.c:2584 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline] rcu_process_callbacks+0xba0/0x1a30 kernel/rcu/tree.c:2881 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1056 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:869 arch_local_irq_restore arch/x86/include/asm/paravirt.h:788 [inline] lock_acquire+0x1ea/0x3f0 kernel/locking/lockdep.c:3903 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x32/0x50 kernel/locking/spinlock.c:216 do_wait+0x3aa/0x9d0 kernel/exit.c:1522 kernel_wait4+0x171/0x290 kernel/exit.c:1668 __do_sys_wait4+0x147/0x160 kernel/exit.c:1680 __se_sys_wait4 kernel/exit.c:1676 [inline] __x64_sys_wait4+0x97/0xf0 kernel/exit.c:1676 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 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+0x16f/0x3f0 kernel/locking/lockdep.c:3900 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] userfaultfd_release+0x4d6/0x720 fs/userfaultfd.c:922 __fput+0x2dd/0x8b0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x145/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x53d/0x620 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.5/14298: #0: 00000000cce4d32c (&ctx->fd_wqh){....}, at: spin_lock_irq include/linux/spinlock.h:354 [inline] #0: 00000000cce4d32c (&ctx->fd_wqh){....}, at: userfaultfd_ctx_read fs/userfaultfd.c:1042 [inline] #0: 00000000cce4d32c (&ctx->fd_wqh){....}, at: userfaultfd_read+0x262/0x18c0 fs/userfaultfd.c:1204 the dependencies between SOFTIRQ-irq-safe lock and the holding lock: -> (&(&ctx->ctx_lock)->rlock){..-.} ops: 24 { IN-SOFTIRQ-W at: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3900 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x60/0x80 kernel/locking/spinlock.c:160 spin_lock_irq include/linux/spinlock.h:354 [inline] free_ioctx_users+0x2d/0x490 fs/aio.c:614 percpu_ref_put_many include/linux/percpu-refcount.h:284 [inline] percpu_ref_put include/linux/percpu-refcount.h:300 [inline] percpu_ref_call_confirm_rcu lib/percpu-refcount.c:123 [inline] percpu_ref_switch_to_atomic_rcu+0x407/0x540 lib/percpu-refcount.c:158 __rcu_reclaim kernel/rcu/rcu.h:236 [inline] rcu_do_batch kernel/rcu/tree.c:2584 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline] rcu_process_callbacks+0xba0/0x1a30 kernel/rcu/tree.c:2881 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1056 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:869 arch_local_irq_restore arch/x86/include/asm/paravirt.h:788 [inline] lock_acquire+0x1ea/0x3f0 kernel/locking/lockdep.c:3903 __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline] _raw_read_lock+0x32/0x50 kernel/locking/spinlock.c:216 do_wait+0x3aa/0x9d0 kernel/exit.c:1522 kernel_wait4+0x171/0x290 kernel/exit.c:1668 __do_sys_wait4+0x147/0x160 kernel/exit.c:1680 __se_sys_wait4 kernel/exit.c:1676 [inline] __x64_sys_wait4+0x97/0xf0 kernel/exit.c:1676 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe INITIAL USE at: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3900 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x60/0x80 kernel/locking/spinlock.c:160 spin_lock_irq include/linux/spinlock.h:354 [inline] aio_poll fs/aio.c:1739 [inline] __io_submit_one fs/aio.c:1849 [inline] io_submit_one+0xead/0x2eb0 fs/aio.c:1885 __do_sys_io_submit fs/aio.c:1929 [inline] __se_sys_io_submit fs/aio.c:1900 [inline] __x64_sys_io_submit+0x1aa/0x520 fs/aio.c:1900 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe } ... key at: [] __key.50192+0x0/0x40 ... acquired at: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] aio_poll fs/aio.c:1741 [inline] __io_submit_one fs/aio.c:1849 [inline] io_submit_one+0xef2/0x2eb0 fs/aio.c:1885 __do_sys_io_submit fs/aio.c:1929 [inline] __se_sys_io_submit fs/aio.c:1900 [inline] __x64_sys_io_submit+0x1aa/0x520 fs/aio.c:1900 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> (&ctx->fd_wqh){....} ops: 19 { INITIAL USE at: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3900 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152 __wake_up_common_lock+0xc7/0x190 kernel/sched/wait.c:120 __wake_up+0xe/0x10 kernel/sched/wait.c:145 userfaultfd_release+0x534/0x720 fs/userfaultfd.c:930 __fput+0x2dd/0x8b0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x145/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe } ... key at: [] __key.43729+0x0/0x40 ... acquired at: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3900 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] userfaultfd_ctx_read fs/userfaultfd.c:1046 [inline] userfaultfd_read+0x394/0x18c0 fs/userfaultfd.c:1204 __vfs_read+0x114/0x800 fs/read_write.c:416 vfs_read+0x194/0x3d0 fs/read_write.c:452 ksys_read+0x14f/0x2d0 fs/read_write.c:579 __do_sys_read fs/read_write.c:589 [inline] __se_sys_read fs/read_write.c:587 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:587 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (&ctx->fault_pending_wqh){+.+.} ops: 18 { HARDIRQ-ON-W at: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3900 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] userfaultfd_release+0x4d6/0x720 fs/userfaultfd.c:922 __fput+0x2dd/0x8b0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x145/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe SOFTIRQ-ON-W at: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3900 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] userfaultfd_release+0x4d6/0x720 fs/userfaultfd.c:922 __fput+0x2dd/0x8b0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x145/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe INITIAL USE at: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3900 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] userfaultfd_release+0x4d6/0x720 fs/userfaultfd.c:922 __fput+0x2dd/0x8b0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x145/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe } ... key at: [] __key.43726+0x0/0x40 ... acquired at: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3900 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] userfaultfd_ctx_read fs/userfaultfd.c:1046 [inline] userfaultfd_read+0x394/0x18c0 fs/userfaultfd.c:1204 __vfs_read+0x114/0x800 fs/read_write.c:416 vfs_read+0x194/0x3d0 fs/read_write.c:452 ksys_read+0x14f/0x2d0 fs/read_write.c:579 __do_sys_read fs/read_write.c:589 [inline] __se_sys_read fs/read_write.c:587 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:587 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe stack backtrace: CPU: 1 PID: 14298 Comm: syz-executor.5 Not tainted 4.19.51 #23 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:1568 [inline] check_usage.cold+0x611/0x946 kernel/locking/lockdep.c:1600 check_irq_usage kernel/locking/lockdep.c:1656 [inline] check_prev_add_irq kernel/locking/lockdep_states.h:8 [inline] check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1974 [inline] validate_chain kernel/locking/lockdep.c:2415 [inline] __lock_acquire+0x1ee4/0x48f0 kernel/locking/lockdep.c:3411 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3900 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] userfaultfd_ctx_read fs/userfaultfd.c:1046 [inline] userfaultfd_read+0x394/0x18c0 fs/userfaultfd.c:1204 __vfs_read+0x114/0x800 fs/read_write.c:416 vfs_read+0x194/0x3d0 fs/read_write.c:452 ksys_read+0x14f/0x2d0 fs/read_write.c:579 __do_sys_read fs/read_write.c:589 [inline] __se_sys_read fs/read_write.c:587 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:587 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4592c9 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:00007f0757589c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004592c9 RDX: 0000000000000080 RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f075758a6d4 R13: 00000000004c53aa R14: 00000000004db138 R15: 00000000ffffffff kobject: 'loop2' (0000000002f15579): kobject_uevent_env audit: type=1804 audit(1560788985.770:169): pid=14307 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir505565318/syzkaller.hhwUQJ/224/file0" dev="sda1" ino=16596 res=1 base_sock_release(000000000a9d76fa) sk=000000001b6f94d4 kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' base_sock_release(00000000b3be2f9b) sk=000000003140a275 kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' base_sock_release(00000000de93471b) sk=000000002e913273 kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' audit: type=1804 audit(1560788986.460:170): pid=14307 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir505565318/syzkaller.hhwUQJ/224/file0" dev="sda1" ino=16596 res=1 audit: type=1800 audit(1560788986.500:171): pid=14315 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=collect_data cause=failed comm="syz-executor.3" name="file0" dev="sda1" ino=16596 res=0 audit: type=1800 audit(1560788986.500:172): pid=14307 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=collect_data cause=failed comm="syz-executor.3" name="file0" dev="sda1" ino=16596 res=0 kobject: 'loop5' (00000000bb7a38fc): kobject_uevent_env kobject: 'loop5' (00000000bb7a38fc): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' audit: type=1804 audit(1560788986.740:173): pid=14362 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir583878144/syzkaller.GdbdOa/233/file0" dev="sda1" ino=16625 res=1 kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000068df1185): kobject_uevent_env audit: type=1804 audit(1560788986.880:174): pid=14371 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir988739505/syzkaller.Hv6eRt/234/file0" dev="sda1" ino=16550 res=1 kobject: 'loop3' (0000000068df1185): fill_kobj_path: path = '/devices/virtual/block/loop3' audit: type=1804 audit(1560788986.960:175): pid=14377 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir505565318/syzkaller.hhwUQJ/225/file0" dev="sda1" ino=16568 res=1 kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000bb7a38fc): kobject_uevent_env kobject: 'loop5' (00000000bb7a38fc): fill_kobj_path: path = '/devices/virtual/block/loop5' audit: type=1804 audit(1560788987.840:176): pid=14407 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir988739505/syzkaller.Hv6eRt/235/file0" dev="sda1" ino=16552 res=1 kobject: 'loop3' (0000000068df1185): kobject_uevent_env kobject: 'loop3' (0000000068df1185): fill_kobj_path: path = '/devices/virtual/block/loop3' audit: type=1804 audit(1560788987.850:177): pid=14411 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir505565318/syzkaller.hhwUQJ/226/file0" dev="sda1" ino=16568 res=1 kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' audit: type=1804 audit(1560788987.870:178): pid=14413 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir583878144/syzkaller.GdbdOa/234/file0" dev="sda1" ino=16593 res=1 kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000bb7a38fc): kobject_uevent_env kobject: 'loop5' (00000000bb7a38fc): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000068df1185): kobject_uevent_env kobject: 'loop3' (0000000068df1185): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000bb7a38fc): kobject_uevent_env kobject: 'loop5' (00000000bb7a38fc): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (0000000068df1185): kobject_uevent_env kobject: 'loop3' (0000000068df1185): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000bb7a38fc): kobject_uevent_env kobject: 'loop5' (00000000bb7a38fc): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (0000000068df1185): kobject_uevent_env kobject: 'loop3' (0000000068df1185): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000bb7a38fc): kobject_uevent_env kobject: 'loop5' (00000000bb7a38fc): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kauditd_printk_skb: 9 callbacks suppressed audit: type=1804 audit(1560788991.130:188): pid=14546 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir988739505/syzkaller.Hv6eRt/239/file0" dev="sda1" ino=16579 res=1 kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (0000000068df1185): kobject_uevent_env audit: type=1804 audit(1560788991.350:189): pid=14559 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir505565318/syzkaller.hhwUQJ/230/file0" dev="sda1" ino=16552 res=1 kobject: 'loop3' (0000000068df1185): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' audit: type=1804 audit(1560788991.590:190): pid=14570 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir583878144/syzkaller.GdbdOa/238/file0" dev="sda1" ino=16566 res=1 kobject: 'loop5' (00000000bb7a38fc): kobject_uevent_env kobject: 'loop5' (00000000bb7a38fc): fill_kobj_path: path = '/devices/virtual/block/loop5' audit: type=1804 audit(1560788991.890:191): pid=14575 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir988739505/syzkaller.Hv6eRt/240/file0" dev="sda1" ino=16628 res=1 net_ratelimit: 4 callbacks suppressed protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' audit: type=1804 audit(1560788992.050:192): pid=14583 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir126240487/syzkaller.IA6U76/252/file0" dev="sda1" ino=16579 res=1 kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000068df1185): kobject_uevent_env audit: type=1804 audit(1560788992.250:193): pid=14588 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir505565318/syzkaller.hhwUQJ/231/file0" dev="sda1" ino=16552 res=1 kobject: 'loop3' (0000000068df1185): fill_kobj_path: path = '/devices/virtual/block/loop3' audit: type=1804 audit(1560788992.430:194): pid=14592 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir583878144/syzkaller.GdbdOa/239/file0" dev="sda1" ino=16611 res=1 kobject: 'loop3' (0000000068df1185): kobject_uevent_env kobject: 'loop3' (0000000068df1185): fill_kobj_path: path = '/devices/virtual/block/loop3' audit: type=1804 audit(1560788992.460:195): pid=14596 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir505565318/syzkaller.hhwUQJ/232/file0" dev="sda1" ino=16549 res=1 kobject: 'loop2' (0000000002f15579): kobject_uevent_env audit: type=1804 audit(1560788992.600:196): pid=14602 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir505565318/syzkaller.hhwUQJ/233/file0" dev="sda1" ino=16561 res=1 kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000bb7a38fc): kobject_uevent_env kobject: 'loop5' (00000000bb7a38fc): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop5' (00000000bb7a38fc): kobject_uevent_env kobject: 'loop5' (00000000bb7a38fc): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (0000000068df1185): kobject_uevent_env kobject: 'loop3' (0000000068df1185): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' audit: type=1804 audit(1560788993.050:197): pid=14620 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir126240487/syzkaller.IA6U76/253/file0" dev="sda1" ino=16849 res=1 kobject: 'loop5' (00000000bb7a38fc): kobject_uevent_env kobject: 'loop5' (00000000bb7a38fc): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000068df1185): kobject_uevent_env kobject: 'loop3' (0000000068df1185): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000bb7a38fc): kobject_uevent_env kobject: 'loop5' (00000000bb7a38fc): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000db548acd): kobject_uevent_env kobject: 'loop4' (00000000db548acd): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000002f15579): kobject_uevent_env kobject: 'loop2' (0000000002f15579): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000bb7a38fc): kobject_uevent_env kobject: 'loop5' (00000000bb7a38fc): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop5' (00000000bb7a38fc): kobject_uevent_env kobject: 'loop5' (00000000bb7a38fc): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (0000000068df1185): kobject_uevent_env kobject: 'loop3' (0000000068df1185): fill_kobj_path: path = '/devices/virtual/block/loop3'