hid-generic 0000:0000:0000.018F: unknown main item tag 0x0 hid-generic 0000:0000:0000.018F: unknown main item tag 0x0 hid-generic 0000:0000:0000.018F: unknown main item tag 0x0 hid-generic 0000:0000:0000.018F: unknown main item tag 0x0 hid-generic 0000:0000:0000.018F: hidraw0: HID v0.00 Device [syz0] on syz0 INFO: task init:29089 blocked for more than 140 seconds. Not tainted 4.4.174+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D ffff8801d8527718 29088 29089 1 0x00000000 ffff8801d8527718 ffff8801d1322f80 a457005991849b9d ffff8801d1322f80 0000000000000000 ffff8801d1323800 ffff8801db71f180 ffff8801db71f1a8 ffff8801db71e898 ffff8801d3842f80 ffff8801d1322f80 ffffed003b0a4001 Call Trace: [] schedule+0x99/0x1d0 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+0x3c2/0xb80 kernel/locking/mutex.c:621 [] tty_open+0x56a/0xf50 drivers/tty/tty_io.c:2067 [] chrdev_open+0x230/0x630 fs/char_dev.c:388 [] do_dentry_open+0x38f/0xbd0 fs/open.c:749 [] vfs_open+0x10b/0x210 fs/open.c:862 [] do_last fs/namei.c:3269 [inline] [] path_openat+0x136f/0x4470 fs/namei.c:3406 [] do_filp_open+0x1a1/0x270 fs/namei.c:3440 [] do_sys_open+0x2f8/0x600 fs/open.c:1038 [] SYSC_open fs/open.c:1056 [inline] [] SyS_open+0x2d/0x40 fs/open.c:1051 [] entry_SYSCALL_64_fastpath+0x1e/0x9a 1 lock held by init/29089: #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x56a/0xf50 drivers/tty/tty_io.c:2067 Sending NMI to all CPUs: NMI backtrace for cpu 0 CPU: 0 PID: 20 Comm: khungtaskd Not tainted 4.4.174+ #4 task: ffff8801da6f4740 task.stack: ffff8800001d0000 RIP: 0010:[] [] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:62 [inline] RIP: 0010:[] [] flat_send_IPI_mask+0xf7/0x1b0 arch/x86/kernel/apic/apic_flat_64.c:69 RSP: 0018:ffff8800001d7c88 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000c00 RCX: 0000000000000000 RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fc300 RBP: ffff8800001d7cb8 R08: 0000000000000018 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246 R13: 0000000003000000 R14: ffffffff82e5f2e0 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000dcef90 CR3: 00000000a7aa6000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: 0000000000000001 ffffffff82e5f2e0 ffffffff831a6ac0 fffffbfff0634c34 000000000001b6c0 0000000000000008 ffff8800001d7cd8 ffffffff81092bee 0000000000000008 ffffffff82924260 ffff8800001d7d30 ffffffff81ab8252 Call Trace: [] nmi_raise_cpu_backtrace+0x5e/0x80 arch/x86/kernel/apic/hw_nmi.c:33 [] nmi_trigger_all_cpu_backtrace.cold+0xa1/0xae 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+0xd3/0xee kernel/hung_task.c:238 [] kthread+0x273/0x310 kernel/kthread.c:211 [] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:537 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 1e 4c 89 e7 57 9d 0f 1f 44 00 00 e8 f1 NMI backtrace for cpu 1 CPU: 1 PID: 2113 Comm: syz-executor.1 Not tainted 4.4.174+ #4 task: ffff8801cf4d5f00 task.stack: ffff8801c26e8000 RIP: 0010:[] [] flex_array_get_ptr+0x46/0x70 lib/flex_array.c:353 RSP: 0018:ffff8801c26ef8f0 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff8801d7052030 RCX: 0000000000000008 RDX: 1ffff1003ae0a406 RSI: ffffffff81ae69ec RDI: ffff8801d778c408 RBP: ffff8801c26ef908 R08: 1ffff100384ddf89 R09: ffff8801c26efc4c R10: ffffed00384ddf8d R11: ffff8801c26efc6b R12: ffff8801d70fcc08 R13: 0000000000000de6 R14: ffff8801c26efa68 R15: ffff8800b9053728 FS: 0000000000f2b940(0063) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f54edde000 CR3: 00000001c2563000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Stack: 0000000038e86e0c ffff8801d778c400 ffff8800b9053720 ffff8801c26ef970 ffffffff81985511 ffff8801c26efa6a 07078800b9053720 ffff8801c26efa6c 00000000000000a7 ffff8800b9053728 ffff8800b9053728 ffff8800b9053720 Call Trace: [] avtab_search_node+0x1d1/0x490 security/selinux/ss/avtab.c:229 [] context_struct_compute_av+0x565/0x1080 security/selinux/ss/services.c:693 [] security_compute_av+0x290/0x770 security/selinux/ss/services.c:1126 [] avc_compute_av+0xc9/0x610 security/selinux/avc.c:974 [] avc_has_perm_noaudit security/selinux/avc.c:1112 [inline] [] avc_has_perm+0x355/0x3a0 security/selinux/avc.c:1146 [] sock_has_perm+0x29d/0x400 security/selinux/hooks.c:4066 [] selinux_socket_getsockopt+0x3f/0x50 security/selinux/hooks.c:4346 [] security_socket_getsockopt+0x83/0xc0 security/security.c:1259 [] SYSC_getsockopt net/socket.c:1801 [inline] [] SyS_getsockopt+0xca/0x220 net/socket.c:1793 [] entry_SYSCALL_64_fastpath+0x1e/0x9a Code: b1 fd ff ff 48 85 c0 74 31 48 89 c3 e8 04 2c 82 ff 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 17 4c 8b 23 e5 2b 82 ff 4c 89 e0 5b 41 5c 41 5d 5d c3 45 31 e4 eb ec 48