[....] 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. [ 41.116947] audit: type=1800 audit(1568312754.027:33): pid=7526 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 45.603372] kauditd_printk_skb: 1 callbacks suppressed [ 45.603385] audit: type=1400 audit(1568312758.507:35): avc: denied { map } for pid=7700 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 '10.128.0.240' (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 [ 80.549842] audit: type=1400 audit(1568312793.457:36): avc: denied { map } for pid=7712 comm="syz-executor418" path="/root/syz-executor418678038" dev="sda1" ino=1426 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 [ 81.512648] ------------[ cut here ]------------ [ 81.526882] refcount_t: increment on 0; use-after-free. [ 81.538234] WARNING: CPU: 1 PID: 7890 at lib/refcount.c:153 refcount_inc_checked+0x61/0x70 [ 81.546688] Kernel panic - not syncing: panic_on_warn set ... [ 81.546688] [ 81.554083] CPU: 1 PID: 7890 Comm: syz-executor418 Not tainted 4.19.72 #0 [ 81.561030] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.570476] Call Trace: [ 81.573102] dump_stack+0x172/0x1f0 [ 81.576759] panic+0x263/0x507 [ 81.579986] ? __warn_printk+0xf3/0xf3 [ 81.583901] ? refcount_inc_checked+0x61/0x70 [ 81.588524] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 81.594122] ? __warn.cold+0x5/0x4a [ 81.597861] ? __warn+0xe8/0x1d0 [ 81.601251] ? refcount_inc_checked+0x61/0x70 [ 81.605766] __warn.cold+0x20/0x4a [ 81.609372] ? refcount_inc_checked+0x61/0x70 [ 81.613892] report_bug+0x263/0x2b0 [ 81.617541] do_error_trap+0x204/0x360 [ 81.621453] ? math_error+0x340/0x340 [ 81.625279] ? vprintk_emit+0x264/0x690 [ 81.629268] ? vprintk_emit+0x1ab/0x690 [ 81.633266] ? error_entry+0x7c/0xe0 [ 81.637003] ? trace_hardirqs_off_caller+0x65/0x220 [ 81.642066] ? vprintk_default+0x28/0x30 [ 81.646153] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 81.651138] do_invalid_op+0x1b/0x20 [ 81.656615] invalid_op+0x14/0x20 [ 81.660095] RIP: 0010:refcount_inc_checked+0x61/0x70 [ 81.665211] Code: 1d 84 46 13 06 31 ff 89 de e8 5b b4 46 fe 84 db 75 dd e8 12 b3 46 fe 48 c7 c7 e0 29 82 87 c6 05 64 46 13 06 01 e8 3d 3f 1a fe <0f> 0b eb c1 90 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 [ 81.684739] RSP: 0018:ffff8880a8947920 EFLAGS: 00010286 [ 81.690237] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 81.697533] RDX: 0000000000000000 RSI: ffffffff8155cf16 RDI: ffffed1015128f16 [ 81.704889] RBP: ffff8880a8947930 R08: ffff888089b5c500 R09: ffffed1015d25079 [ 81.712186] R10: ffffed1015d25078 R11: ffff8880ae9283c7 R12: ffff8880a7ed1978 [ 81.719476] R13: ffff8880997dfa20 R14: ffff8880997dfa18 R15: ffff8880a7ed18f8 [ 81.726963] ? vprintk_func+0x86/0x189 [ 81.730847] kobject_get+0x66/0xc0 [ 81.734461] kobject_add_internal+0x14f/0x380 [ 81.738943] ? kfree_const+0x5e/0x70 [ 81.742642] kobject_add+0x150/0x1c0 [ 81.746475] ? kset_create_and_add+0x1a0/0x1a0 [ 81.751045] ? rcu_read_lock_sched_held+0x110/0x130 [ 81.756221] ? kmem_cache_alloc_trace+0x348/0x760 [ 81.761075] get_device_parent.isra.0+0x415/0x570 [ 81.766220] device_add+0x2f4/0x1760 [ 81.769940] ? device_initialize+0x440/0x440 [ 81.774348] ? get_device_parent.isra.0+0x570/0x570 [ 81.779378] hci_register_dev+0x304/0x880 [ 81.783524] __vhci_create_device+0x2d0/0x5a0 [ 81.788841] vhci_write+0x2d6/0x470 [ 81.792528] __vfs_write+0x587/0x810 [ 81.796289] ? kernel_read+0x120/0x120 [ 81.800168] ? __inode_security_revalidate+0xda/0x120 [ 81.805779] ? selinux_file_permission+0x92/0x550 [ 81.810850] ? security_file_permission+0x89/0x230 [ 81.815785] ? rw_verify_area+0x118/0x360 [ 81.820003] vfs_write+0x20c/0x560 [ 81.823650] ksys_write+0x14f/0x2d0 [ 81.827270] ? __ia32_sys_read+0xb0/0xb0 [ 81.831330] ? do_syscall_64+0x26/0x620 [ 81.835311] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 81.840676] ? do_syscall_64+0x26/0x620 [ 81.844642] __x64_sys_write+0x73/0xb0 [ 81.848531] do_syscall_64+0xfd/0x620 [ 81.852851] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 81.858027] RIP: 0033:0x4412a9 [ 81.861208] 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 [ 81.880108] RSP: 002b:00007ffed065d908 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 81.887820] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412a9 [ 81.895260] RDX: 0000000000000002 RSI: 0000000020000000 RDI: 0000000000000003 [ 81.902523] RBP: 0000000000013e19 R08: 00000000004002c8 R09: 00000000004002c8 [ 81.909791] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000402020 [ 81.917048] R13: 00000000004020b0 R14: 0000000000000000 R15: 0000000000000000 [ 81.926355] Kernel Offset: disabled [ 81.930044] Rebooting in 86400 seconds..