audit: type=1400 audit(1537664475.581:64): avc: denied { create } for pid=8942 comm="syz-executor3" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=0 INFO: task syz-executor2:8960 blocked for more than 140 seconds. Not tainted 4.4.157+ #101 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D ffff8801c0b57d58 29016 8960 2128 0x00000004 ffff8801c0b57d58 0000000000000000 ffff8801d3b8b848 ffffed003a771708 ffff8801d3b8af00 ffff8801db61f180 ffff8801db61f1a8 ffff8801db61e898 ffff8801db61e880 ffff8801c14b5f00 ffff8801d3b8af80 0000000000000000 Call Trace: [] schedule+0x7a/0x1b0 kernel/sched/core.c:3355 [] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3388 [] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [] mutex_lock_nested+0x307/0x840 kernel/locking/mutex.c:621 [] evdev_flush+0x72/0x120 drivers/input/evdev.c:350 [] filp_close+0xa7/0x140 fs/open.c:1095 [] __close_fd+0x1a1/0x2b0 fs/file.c:650 [] SYSC_close fs/open.c:1114 [inline] [] SyS_close+0x4c/0x90 fs/open.c:1112 [] entry_SYSCALL_64_fastpath+0x1e/0x9a 1 lock held by syz-executor2/8960: #0: (&evdev->mutex){+.+.+.}, at: [] evdev_flush+0x72/0x120 drivers/input/evdev.c:350 Sending NMI to all CPUs: NMI backtrace for cpu 0 CPU: 0 PID: 8588 Comm: syz-executor5 Not tainted 4.4.157+ #101 task: ffff8800a70ec740 task.stack: ffff8801c1230000 RIP: 0010:[] [] seccomp_phase1+0x0/0xbf0 kernel/seccomp.c:459 RSP: 0018:ffff8801c1237e58 EFLAGS: 00000293 RAX: ffff8800a70ec740 RBX: 1ffff10038246fd0 RCX: 1ffff10038246ff3 RDX: 0000000000000000 RSI: ffffffff81004a8e RDI: ffff8801c1237ea0 RBP: ffff8801c1237f48 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: ffff8801c1237f20 R13: 0000000000000100 R14: 00000000c000003e R15: ffff8801c1237f58 FS: 00007f038ba6f700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007eff2e4b7000 CR3: 00000001d10ed000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffffff81004a98 ffff8801c1237fd0 0000000000000080 000000000072bf08 0000000000000000 0000000041b58ab3 ffffffff82c38a40 ffffffff810047d0 dffffc0000000000 c000003e000000ca 0000000000457679 000000000072bf08 Call Trace: [] tracesys+0xd/0x44 Code: ff ff e8 e4 86 16 00 e9 0e f9 ff ff e8 7a 87 16 00 e9 ca f8 ff ff e8 70 87 16 00 e9 8a f8 ff ff e8 c6 86 16 00 e9 53 f8 ff ff 90 <55> 48 89 e5 41 57 48 8d 85 38 ff ff ff 41 56 49 89 fe 41 55 48 NMI backtrace for cpu 1 CPU: 1 PID: 20 Comm: khungtaskd Not tainted 4.4.157+ #101 task: ffff8801da6f2f80 task.stack: ffff8801d9ed0000 RIP: 0010:[] [] native_apic_mem_write arch/x86/include/asm/apic.h:93 [inline] RIP: 0010:[] [] __default_send_IPI_dest_field arch/x86/include/asm/ipi.h:119 [inline] RIP: 0010:[] [] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:61 [inline] RIP: 0010:[] [] flat_send_IPI_mask+0xf6/0x1a0 arch/x86/kernel/apic/apic_flat_64.c:69 RSP: 0018:ffff8801d9ed7cc8 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000c00 RCX: 0000000000000000 RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fc300 RBP: ffff8801d9ed7cf0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246 R13: 0000000003000000 R14: ffffffff82e5f3a0 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000022033e0 CR3: 00000001d6889000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffffff82e5f3a0 ffffffff831a3020 0000000000000007 fffffbfff06344e4 0000000000000008 ffff8801d9ed7d10 ffffffff81091a11 ffffffff82920920 0000000000000003 ffff8801d9ed7d68 ffffffff81a604a2 ffffffff813919a5 Call Trace: [] nmi_raise_cpu_backtrace+0x61/0x80 arch/x86/kernel/apic/hw_nmi.c:33 [] nmi_trigger_all_cpu_backtrace.cold.0+0x70/0xae lib/nmi_backtrace.c:85 [] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 [] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline] [] check_hung_task kernel/hung_task.c:125 [inline] [] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline] [] watchdog.cold.0+0xd3/0xee kernel/hung_task.c:238 [] kthread+0x268/0x300 kernel/kthread.c:211 [] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510 Code: 00 c3 5f ff 80 e6 10 75 e1 41 c1 e5 18 44 89 2c 25 10 c3 5f ff 44 89 fa 09 da 80 cf 04 41 83 ff 02 0f 44 d3 89 14 25 00 c3 5f ff <41> f7 c4 00 02 00 00 75 1a 4c 89 e7 57 9d 0f 1f 44 00 00 e8 f2