[ 44.227138] audit: type=1800 audit(1545705763.154:30): pid=8038 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 48.601710] kauditd_printk_skb: 4 callbacks suppressed [ 48.601724] audit: type=1400 audit(1545705767.554:35): avc: denied { map } for pid=8213 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.99' (ECDSA) to the list of known hosts. executing program [ 55.299157] audit: type=1400 audit(1545705774.254:36): avc: denied { map } for pid=8225 comm="syz-executor096" path="/root/syz-executor096403015" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 55.306624] FAULT_INJECTION: forcing a failure. [ 55.306624] name failslab, interval 1, probability 0, space 0, times 1 [ 55.337713] CPU: 1 PID: 8225 Comm: syz-executor096 Not tainted 4.20.0 #167 [ 55.344759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.354099] Call Trace: [ 55.356680] dump_stack+0x1d3/0x2c6 [ 55.360304] ? dump_stack_print_info.cold.1+0x20/0x20 [ 55.365502] ? trace_hardirqs_on+0xbd/0x310 [ 55.369812] ? kasan_check_read+0x11/0x20 [ 55.373946] ? depot_save_stack+0x292/0x470 [ 55.378258] should_fail.cold.4+0xa/0x17 [ 55.382310] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 55.387396] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 55.392497] ? depot_save_stack+0x292/0x470 [ 55.396813] ? save_stack+0xa9/0xd0 [ 55.400444] ? graph_lock+0x270/0x270 [ 55.404235] ? save_stack+0x43/0xd0 [ 55.407863] ? kasan_kmalloc+0xc7/0xe0 [ 55.411760] ? kmem_cache_alloc_trace+0x152/0x750 [ 55.416594] ? slip_open+0x97b/0x1107 [ 55.420379] ? tty_ldisc_open.isra.1+0x8b/0xe0 [ 55.424945] ? tty_set_ldisc+0x2dc/0x6a0 [ 55.428996] ? tty_ioctl+0x39d/0x17d0 [ 55.432795] ? find_held_lock+0x36/0x1c0 [ 55.436845] ? __lock_is_held+0xb5/0x140 [ 55.440893] ? ___might_sleep+0x1ed/0x300 [ 55.445036] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.450559] ? arch_local_save_flags+0x40/0x40 [ 55.455334] __should_failslab+0x124/0x180 [ 55.459571] should_failslab+0x9/0x14 [ 55.463368] kmem_cache_alloc_trace+0x2d7/0x750 [ 55.468023] ? slip_open+0x97b/0x1107 [ 55.471813] ? rcu_read_lock_sched_held+0x108/0x120 [ 55.476818] ? kmem_cache_alloc_trace+0x353/0x750 [ 55.481658] slhc_init+0xa8/0x53d [ 55.485102] slip_open+0x99b/0x1107 [ 55.488719] ? sl_uninit+0x20/0x20 [ 55.492271] ? down_write_nested+0x130/0x130 [ 55.496665] ? down_read+0x120/0x120 [ 55.500366] ? sl_uninit+0x20/0x20 [ 55.503917] tty_ldisc_open.isra.1+0x8b/0xe0 [ 55.508316] tty_set_ldisc+0x2dc/0x6a0 [ 55.512192] tty_ioctl+0x39d/0x17d0 [ 55.515805] ? tty_vhangup+0x30/0x30 [ 55.519505] ? avc_has_extended_perms+0xab2/0x15a0 [ 55.524431] ? avc_ss_reset+0x190/0x190 [ 55.528391] ? rcu_read_unlock_special+0x1d0/0x1d0 [ 55.533327] ? rcu_softirq_qs+0x20/0x20 [ 55.537289] ? find_vpid+0xf0/0xf0 [ 55.540833] ? graph_lock+0x270/0x270 [ 55.544643] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 55.550487] ? ___might_sleep+0x1ed/0x300 [ 55.554629] ? arch_local_save_flags+0x40/0x40 [ 55.559216] ? tty_vhangup+0x30/0x30 [ 55.562927] do_vfs_ioctl+0x1de/0x1790 [ 55.566815] ? ioctl_preallocate+0x300/0x300 [ 55.571208] ? selinux_file_mprotect+0x620/0x620 [ 55.575952] ? __sb_end_write+0xd9/0x110 [ 55.580005] ? do_syscall_64+0x9a/0x820 [ 55.583972] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.589492] ? security_file_ioctl+0x94/0xc0 [ 55.593885] ksys_ioctl+0xa9/0xd0 [ 55.597321] __x64_sys_ioctl+0x73/0xb0 [ 55.601192] do_syscall_64+0x1b9/0x820 [ 55.605074] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 55.610433] ? syscall_return_slowpath+0x5e0/0x5e0 [ 55.615351] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 55.620183] ? trace_hardirqs_on_caller+0x310/0x310 [ 55.625183] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 55.630183] ? prepare_exit_to_usermode+0x291/0x3b0 [ 55.635184] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 55.640011] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.645184] RIP: 0033:0x440359 [ 55.648365] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 55.667348] RSP: 002b:00007fff63454bb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 55.675040] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440359 [ 55.682296] RDX: 0000000020000080 RSI: 0000000000005423 RDI: 0000000000000003 [ 55.689548] RBP: 00000000006cb018 R08: 0000000000000001 R09: 0000000000000039 [ 55.696808] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 55.704068] R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000 [ 55.713540] BUG: unable to handle kernel paging request at fffffffffffffff4 [ 55.720641] PGD 946d067 P4D 946d067 PUD 946f067 PMD 0 [ 55.725907] Oops: 0000 [#1] PREEMPT SMP KASAN [ 55.730385] CPU: 1 PID: 8225 Comm: syz-executor096 Not tainted 4.20.0 #167 [ 55.737380] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.746744] RIP: 0010:slhc_free+0x30/0xb0 [ 55.750889] Code: 53 48 89 fb e8 71 04 ad fc 48 85 db 74 74 e8 67 04 ad fc 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 69 <4c> 8b 23 4d 85 e4 74 0d e8 43 04 ad fc 4c 89 e7 e8 bb e1 ef fc e8 [ 55.769790] RSP: 0018:ffff8881c1a0f770 EFLAGS: 00010246 [ 55.775134] RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: 1ffff1103408b936 [ 55.782409] RDX: 1ffffffffffffffe RSI: ffffffff84d15439 RDI: fffffffffffffff4 [ 55.789662] RBP: ffff8881c1a0f780 R08: ffff8881a045c9b0 R09: 0000000000000006 [ 55.796915] R10: 0000000000000000 R11: ffff8881a045c0c0 R12: 00000000ffffff97 [ 55.804165] R13: ffff8881c0ca04c0 R14: ffff8881c0daed00 R15: ffff8881c2152ac0 [ 55.811427] FS: 000000000078a880(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 [ 55.819636] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.825501] CR2: fffffffffffffff4 CR3: 00000001b0909000 CR4: 00000000001406e0 [ 55.832755] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.840006] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.847268] Call Trace: [ 55.849845] slip_open+0xdee/0x1107 [ 55.853462] ? sl_uninit+0x20/0x20 [ 55.856990] ? down_write_nested+0x130/0x130 [ 55.861398] ? down_read+0x120/0x120 [ 55.865111] ? sl_uninit+0x20/0x20 [ 55.868633] tty_ldisc_open.isra.1+0x8b/0xe0 [ 55.873027] tty_set_ldisc+0x2dc/0x6a0 [ 55.876898] tty_ioctl+0x39d/0x17d0 [ 55.880506] ? tty_vhangup+0x30/0x30 [ 55.884204] ? avc_has_extended_perms+0xab2/0x15a0 [ 55.889133] ? avc_ss_reset+0x190/0x190 [ 55.893091] ? rcu_read_unlock_special+0x1d0/0x1d0 [ 55.897999] ? rcu_softirq_qs+0x20/0x20 [ 55.901963] ? find_vpid+0xf0/0xf0 [ 55.905490] ? graph_lock+0x270/0x270 [ 55.909277] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 55.914811] ? ___might_sleep+0x1ed/0x300 [ 55.918956] ? arch_local_save_flags+0x40/0x40 [ 55.923523] ? tty_vhangup+0x30/0x30 [ 55.927220] do_vfs_ioctl+0x1de/0x1790 [ 55.931114] ? ioctl_preallocate+0x300/0x300 [ 55.935506] ? selinux_file_mprotect+0x620/0x620 [ 55.940245] ? __sb_end_write+0xd9/0x110 [ 55.944298] ? do_syscall_64+0x9a/0x820 [ 55.948283] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.953819] ? security_file_ioctl+0x94/0xc0 [ 55.958320] ksys_ioctl+0xa9/0xd0 [ 55.961760] __x64_sys_ioctl+0x73/0xb0 [ 55.965634] do_syscall_64+0x1b9/0x820 [ 55.969506] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 55.974854] ? syscall_return_slowpath+0x5e0/0x5e0 [ 55.979763] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 55.984593] ? trace_hardirqs_on_caller+0x310/0x310 [ 55.989600] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 55.994602] ? prepare_exit_to_usermode+0x291/0x3b0 [ 55.999606] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 56.004436] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 56.009612] RIP: 0033:0x440359 [ 56.012789] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 56.031669] RSP: 002b:00007fff63454bb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 56.039362] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440359 [ 56.046637] RDX: 0000000020000080 RSI: 0000000000005423 RDI: 0000000000000003 [ 56.053888] RBP: 00000000006cb018 R08: 0000000000000001 R09: 0000000000000039 [ 56.061141] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 56.068400] R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000 [ 56.075654] Modules linked in: [ 56.078826] CR2: fffffffffffffff4 [ 56.082276] ---[ end trace 45b654871fafdc18 ]--- [ 56.087020] RIP: 0010:slhc_free+0x30/0xb0 [ 56.091151] Code: 53 48 89 fb e8 71 04 ad fc 48 85 db 74 74 e8 67 04 ad fc 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 69 <4c> 8b 23 4d 85 e4 74 0d e8 43 04 ad fc 4c 89 e7 e8 bb e1 ef fc e8 [ 56.110035] RSP: 0018:ffff8881c1a0f770 EFLAGS: 00010246 [ 56.115395] RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: 1ffff1103408b936 [ 56.122645] RDX: 1ffffffffffffffe RSI: ffffffff84d15439 RDI: fffffffffffffff4 [ 56.129892] RBP: ffff8881c1a0f780 R08: ffff8881a045c9b0 R09: 0000000000000006 [ 56.137154] R10: 0000000000000000 R11: ffff8881a045c0c0 R12: 00000000ffffff97 [ 56.144405] R13: ffff8881c0ca04c0 R14: ffff8881c0daed00 R15: ffff8881c2152ac0 [ 56.151660] FS: 000000000078a880(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 [ 56.159961] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.165837] CR2: fffffffffffffff4 CR3: 00000001b0909000 CR4: 00000000001406e0 [ 56.173096] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.180346] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 56.187682] Kernel panic - not syncing: Fatal exception [ 56.194351] Kernel Offset: disabled [ 56.197980] Rebooting in 86400 seconds..