[ 45.334938][ T26] audit: type=1800 audit(1555412118.889:30): pid=8089 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: [ 51.505762][ T26] kauditd_printk_skb: 4 callbacks suppressed [ 51.505777][ T26] audit: type=1400 audit(1555412125.099:35): avc: denied { map } for pid=8265 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 '10.128.0.108' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 57.945451][ T26] audit: type=1400 audit(1555412131.539:36): avc: denied { map } for pid=8277 comm="syz-executor204" path="/root/syz-executor204237574" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 60.567528][ T8666] ------------[ cut here ]------------ [ 60.579409][ T8666] refcount_t: increment on 0; use-after-free. [ 60.586907][ T8666] WARNING: CPU: 0 PID: 8666 at lib/refcount.c:156 refcount_inc_checked+0x61/0x70 [ 60.596039][ T8666] Kernel panic - not syncing: panic_on_warn set ... [ 60.602644][ T8666] CPU: 0 PID: 8666 Comm: syz-executor204 Not tainted 5.1.0-rc5+ #69 [ 60.610686][ T8666] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.621577][ T8666] Call Trace: [ 60.624893][ T8666] dump_stack+0x172/0x1f0 [ 60.629369][ T8666] ? refcount_inc_not_zero_checked+0x190/0x200 [ 60.635550][ T8666] panic+0x2cb/0x65c [ 60.639486][ T8666] ? __warn_printk+0xf3/0xf3 [ 60.644122][ T8666] ? refcount_inc_checked+0x61/0x70 [ 60.649358][ T8666] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.655634][ T8666] ? __warn.cold+0x5/0x45 [ 60.660025][ T8666] ? __warn+0xe8/0x1d0 [ 60.664163][ T8666] ? refcount_inc_checked+0x61/0x70 [ 60.669397][ T8666] __warn.cold+0x20/0x45 [ 60.673674][ T8666] ? refcount_inc_checked+0x61/0x70 [ 60.678904][ T8666] report_bug+0x263/0x2b0 [ 60.683269][ T8666] do_error_trap+0x11b/0x200 [ 60.687892][ T8666] do_invalid_op+0x37/0x50 [ 60.692338][ T8666] ? refcount_inc_checked+0x61/0x70 [ 60.697572][ T8666] invalid_op+0x14/0x20 [ 60.701756][ T8666] RIP: 0010:refcount_inc_checked+0x61/0x70 [ 60.707586][ T8666] Code: 1d f6 46 2a 06 31 ff 89 de e8 3b 50 40 fe 84 db 75 dd e8 f2 4e 40 fe 48 c7 c7 20 78 a1 87 c6 05 d6 46 2a 06 01 e8 dd fc 12 fe <0f> 0b eb c1 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 41 57 41 [ 60.727302][ T8666] RSP: 0018:ffff8880989e78e8 EFLAGS: 00010282 [ 60.733388][ T8666] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 60.741377][ T8666] RDX: 0000000000000000 RSI: ffffffff815afcb6 RDI: ffffed101313cf0f [ 60.749375][ T8666] RBP: ffff8880989e78f8 R08: ffff88807b93e100 R09: ffffed1015d05011 [ 60.757368][ T8666] R10: ffffed1015d05010 R11: ffff8880ae828087 R12: ffff88821ae46778 [ 60.765356][ T8666] R13: ffff8880a823ff20 R14: ffff8880a823ff18 R15: ffff88821ae466f8 [ 60.773368][ T8666] ? vprintk_func+0x86/0x189 [ 60.777983][ T8666] ? refcount_inc_checked+0x61/0x70 [ 60.783199][ T8666] kobject_get+0x66/0xc0 [ 60.787552][ T8666] kobject_add_internal+0x14f/0x380 [ 60.792770][ T8666] ? kfree_const+0x5e/0x70 [ 60.797204][ T8666] kobject_add+0x150/0x1c0 [ 60.801635][ T8666] ? kset_create_and_add+0x1a0/0x1a0 [ 60.806937][ T8666] ? get_device_parent.isra.0+0x34e/0x570 [ 60.812668][ T8666] ? rcu_read_lock_sched_held+0x110/0x130 [ 60.818412][ T8666] ? kmem_cache_alloc_trace+0x354/0x760 [ 60.823989][ T8666] get_device_parent.isra.0+0x415/0x570 [ 60.829568][ T8666] device_add+0x2fd/0x18a0 [ 60.834004][ T8666] ? device_initialize+0x440/0x440 [ 60.839147][ T8666] ? get_device_parent.isra.0+0x570/0x570 [ 60.844893][ T8666] hci_register_dev+0x2e8/0x860 [ 60.849767][ T8666] __vhci_create_device+0x2d0/0x5a0 [ 60.854988][ T8666] vhci_write+0x2d0/0x470 [ 60.859347][ T8666] new_sync_write+0x4c7/0x760 [ 60.864041][ T8666] ? default_llseek+0x2e0/0x2e0 [ 60.868917][ T8666] ? avc_policy_seqno+0xd/0x70 [ 60.873693][ T8666] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 60.879430][ T8666] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.885694][ T8666] ? security_file_permission+0x94/0x380 [ 60.891342][ T8666] ? find_held_lock+0x35/0x130 [ 60.896125][ T8666] __vfs_write+0xe4/0x110 [ 60.900485][ T8666] vfs_write+0x20c/0x580 [ 60.904747][ T8666] ksys_write+0x14f/0x2d0 [ 60.909094][ T8666] ? __ia32_sys_read+0xb0/0xb0 [ 60.913878][ T8666] ? do_syscall_64+0x26/0x610 [ 60.918569][ T8666] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 60.924649][ T8666] ? do_syscall_64+0x26/0x610 [ 60.929344][ T8666] __x64_sys_write+0x73/0xb0 [ 60.933962][ T8666] do_syscall_64+0x103/0x610 [ 60.938568][ T8666] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 60.944476][ T8666] RIP: 0033:0x441269 [ 60.948387][ T8666] Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 60.968002][ T8666] RSP: 002b:00007ffd03314e08 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 60.976431][ T8666] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441269 [ 60.984419][ T8666] RDX: 0000000000000002 RSI: 00000000200000c0 RDI: 0000000000000003 [ 60.992405][ T8666] RBP: 000000000000ec55 R08: 00000000004002c8 R09: 00000000004002c8 [ 61.000391][ T8666] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000401fe0 [ 61.008404][ T8666] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000 [ 61.017351][ T8666] Kernel Offset: disabled [ 61.021759][ T8666] Rebooting in 86400 seconds..