BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 0, pid: 6053, name: udevd INFO: lockdep is turned off. Preemption disabled at: [] __do_softirq+0x189/0xb03 kernel/softirq.c:269 CPU: 0 PID: 6053 Comm: udevd Not tainted 4.19.0-rc6-next-20181002+ #85 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+0x1d3/0x2c4 lib/dump_stack.c:113 ___might_sleep.cold.89+0x1ba/0x1f3 kernel/sched/core.c:6149 __might_sleep+0x95/0x190 kernel/sched/core.c:6102 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc_trace+0x2cd/0x750 mm/slab.c:3618 kmalloc include/linux/slab.h:546 [inline] kzalloc include/linux/slab.h:741 [inline] kobject_uevent_env+0x2f3/0x101e lib/kobject_uevent.c:514 kobject_uevent+0x1f/0x24 lib/kobject_uevent.c:636 kobject_cleanup lib/kobject.c:649 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold.9+0x170/0x2e4 lib/kobject.c:708 put_device+0x20/0x30 drivers/base/core.c:2024 delete_partition_rcu_cb+0x147/0x1b0 block/partition-generic.c:259 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2437 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2716 [inline] rcu_process_callbacks+0xff9/0x1ad0 kernel/rcu/tree.c:2697 __do_softirq+0x30b/0xb03 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x750 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:arch_local_irq_enable arch/x86/include/asm/paravirt.h:771 [inline] RIP: 0010:__do_page_fault+0x723/0xd10 arch/x86/mm/fault.c:1261 Code: 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5a 05 00 00 48 83 3d 0f df fa 07 00 0f 84 fc 04 00 00 e8 44 58 46 00 fb 66 0f 1f 44 00 00 45 bc 14 00 00 00 e9 b7 fb ff ff e8 2c 58 46 00 48 89 de 4c 89 RSP: 0018:ffff8801bc73f730 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801bc898480 RBX: 00007f16f5fe5000 RCX: ffffffff81837c7a RDX: 0000000000000000 RSI: ffffffff813714fc RDI: ffffffff8931f400 RBP: ffff8801bc73f798 R08: ffff8801bc898480 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801bc73f908 R13: ffff8801bc898480 R14: 0000000000000200 R15: 0000000000000000 do_page_fault+0xed/0x7d1 arch/x86/mm/fault.c:1430 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139 RIP: 0010:copy_user_generic_unrolled+0x89/0xc0 arch/x86/lib/copy_user_64.S:66 Code: 38 4c 89 47 20 4c 89 4f 28 4c 89 57 30 4c 89 5f 38 48 8d 76 40 48 8d 7f 40 ff c9 75 b6 89 d1 83 e2 07 c1 e9 03 74 12 4c 8b 06 <4c> 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 89 d1 8a RSP: 0018:ffff8801bc73f9b0 EFLAGS: 00010206 RAX: ffffed00309ba90e RBX: 000000000000002b RCX: 0000000000000005 RDX: 0000000000000003 RSI: ffff880184dd4840 RDI: 00007f16f5fe5000 RBP: ffff8801bc73f9e8 R08: 0a373d524f4a414d R09: ffffed00309ba908 R10: ffffed00309ba90d R11: ffff880184dd486a R12: 00007f16f5fe502b R13: 00007f16f5fe5000 R14: ffff880184dd4840 R15: 00007ffffffff000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 copy_to_user include/linux/uaccess.h:155 [inline] seq_read+0x763/0x1150 fs/seq_file.c:277 kernfs_fop_read+0x146/0x6a0 fs/kernfs/file.c:252 __vfs_read+0x117/0x9b0 fs/read_write.c:416 vfs_read+0x17f/0x3c0 fs/read_write.c:452 ksys_read+0x101/0x260 fs/read_write.c:578 __do_sys_read fs/read_write.c:588 [inline] __se_sys_read fs/read_write.c:586 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:586 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f16f56e6310 Code: 73 01 c3 48 8b 0d 28 4b 2b 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 83 3d e5 a2 2b 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 6e 8a 01 00 48 89 04 24 RSP: 002b:00007ffcb7155c38 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00000000019b70e0 RCX: 00007f16f56e6310 RDX: 0000000000001000 RSI: 00007f16f5fe5000 RDI: 0000000000000005 RBP: 0000000000003fff R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000022 R11: 0000000000000246 R12: 000000000000000a R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffcb7156110 CPU: 1 PID: 9591 Comm: syz-executor5 Tainted: G W 4.19.0-rc6-next-20181002+ #85 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+0x1d3/0x2c4 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3716 [inline] __kmalloc+0x2d4/0x760 mm/slab.c:3727 kmalloc include/linux/slab.h:551 [inline] kzalloc include/linux/slab.h:741 [inline] kobject_get_path+0xc2/0x1b0 lib/kobject.c:171 kobject_uevent_env+0x314/0x101e lib/kobject_uevent.c:519 kobject_uevent+0x1f/0x24 lib/kobject_uevent.c:636 device_del+0x6c9/0xb70 drivers/base/core.c:2091 delete_partition+0x233/0x2c0 block/partition-generic.c:288 blkpg_ioctl+0x3c5/0xc10 block/ioctl.c:93 blkdev_ioctl+0x1864/0x2010 block/ioctl.c:573 block_ioctl+0xee/0x130 fs/block_dev.c:1883 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457579 Code: 1d b4 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 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fbe7dc0ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fbe7dc0ac90 RCX: 0000000000457579 RDX: 00000000200006c0 RSI: 0000000000001269 RDI: 0000000000000004 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbe7dc0b6d4 R13: 00000000004be93a R14: 00000000004ce5f0 R15: 0000000000000005 BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 0, pid: 9620, name: syz-executor2 INFO: lockdep is turned off. Preemption disabled at: [] __do_softirq+0x189/0xb03 kernel/softirq.c:269 CPU: 0 PID: 9620 Comm: syz-executor2 Tainted: G W 4.19.0-rc6-next-20181002+ #85 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+0x1d3/0x2c4 lib/dump_stack.c:113 ___might_sleep.cold.89+0x1ba/0x1f3 kernel/sched/core.c:6149 __might_sleep+0x95/0x190 kernel/sched/core.c:6102 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc_trace+0x2cd/0x750 mm/slab.c:3618 kmalloc include/linux/slab.h:546 [inline] kzalloc include/linux/slab.h:741 [inline] kobject_uevent_env+0x2f3/0x101e lib/kobject_uevent.c:514 kobject_uevent+0x1f/0x24 lib/kobject_uevent.c:636 kobject_cleanup lib/kobject.c:649 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold.9+0x170/0x2e4 lib/kobject.c:708 put_device+0x20/0x30 drivers/base/core.c:2024 delete_partition_rcu_cb+0x147/0x1b0 block/partition-generic.c:259 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2437 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2716 [inline] rcu_process_callbacks+0xff9/0x1ad0 kernel/rcu/tree.c:2697 __do_softirq+0x30b/0xb03 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x750 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x1a/0x50 kernel/kcov.c:101 Code: 89 54 10 f0 4a 89 4c d8 20 4c 89 08 5d c3 66 90 55 48 89 e5 65 48 8b 04 25 40 ee 01 00 65 8b 15 7c 80 84 7e 81 e2 00 01 1f 00 <48> 8b 75 08 75 2b 8b 90 d0 12 00 00 83 fa 02 75 20 48 8b 88 d8 12 RSP: 0018:ffff8801d9b3f1b0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff8801bb29a0c0 RBX: ffff8801ce6c4f00 RCX: ffffffff86835bc8 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff8801d9b3f1b0 R08: ffff8801bb29a0c0 R09: 000000000000000a R10: ffff8801d9b3ec20 R11: 0000000000000001 R12: 00000000000000aa R13: 0000000000000005 R14: ffff8801d1ff07f0 R15: 0000000000000055 tcp_rearm_rto+0xd2/0x100 net/ipv4/tcp_input.c:2985 tcp_event_new_data_sent+0x2f9/0x3c0 net/ipv4/tcp_output.c:81 tcp_write_xmit+0x15f2/0x5630 net/ipv4/tcp_output.c:2371 __tcp_push_pending_frames+0xb2/0x290 net/ipv4/tcp_output.c:2537 tcp_push_pending_frames include/net/tcp.h:1736 [inline] tcp_data_snd_check net/ipv4/tcp_input.c:5153 [inline] tcp_rcv_established+0xa38/0x2120 net/ipv4/tcp_input.c:5635 tcp_v4_do_rcv+0x635/0x8f0 net/ipv4/tcp_ipv4.c:1532 sk_backlog_rcv include/net/sock.h:932 [inline] __release_sock+0x12a/0x3a0 net/core/sock.c:2336 __sk_flush_backlog+0x27/0x40 net/core/sock.c:2356 sk_flush_backlog include/net/sock.h:1019 [inline] tcp_sendmsg_locked+0x2ea8/0x3f90 net/ipv4/tcp.c:1280 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1443 inet_sendmsg+0x19c/0x690 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:632 __sys_sendto+0x3d7/0x670 net/socket.c:1789 __do_sys_sendto net/socket.c:1801 [inline] __se_sys_sendto net/socket.c:1797 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1797 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457579 Code: 1d b4 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 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f1732420c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000457579 RDX: fffffffffffffe6e RSI: 0000000020a88f88 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000020e68000 R09: 0000000000000010 R10: 0000000020000000 R11: 0000000000000246 R12: 00007f17324216d4 R13: 00000000004c3929 R14: 00000000004d57c0 R15: 00000000ffffffff kvm_set_msr_common: 10 callbacks suppressed kvm [9629]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [9651]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [9651]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [9681]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [9681]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [9709]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [9709]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [9744]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [9744]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [9772]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm_set_msr_common: 15 callbacks suppressed kvm [9953]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [9953]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [9986]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [9986]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [10007]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [10007]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [10036]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [10036]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [10059]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0 kvm [10059]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0xc2 data 0x0