[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 38.766333] audit: type=1800 audit(1555823246.328:33): pid=7477 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 [ 38.793494] audit: type=1800 audit(1555823246.328:34): pid=7477 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 [ 39.213609] audit: type=1400 audit(1555823246.778:35): avc: denied { map } for pid=7653 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 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.13' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 45.916932] audit: type=1400 audit(1555823253.478:36): avc: denied { map } for pid=7666 comm="syz-executor357" path="/root/syz-executor357262845" 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 [ 45.974339] md: md0 stopped. [ 45.977963] WARNING: CPU: 1 PID: 7685 at drivers/md/md.c:7219 md_ioctl+0x4023/0x59a0 [ 45.985926] Kernel panic - not syncing: panic_on_warn set ... [ 45.985926] [ 45.988050] hrtimer: interrupt took 49176 ns [ 45.993296] CPU: 1 PID: 7685 Comm: syz-executor357 Not tainted 4.19.36 #4 [ 46.004623] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.013984] Call Trace: [ 46.016582] dump_stack+0x172/0x1f0 [ 46.020215] panic+0x263/0x51d [ 46.023411] ? __warn_printk+0xf3/0xf3 [ 46.027294] ? md_ioctl+0x4023/0x59a0 [ 46.031088] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.036616] ? __warn.cold+0x5/0x54 [ 46.040246] ? __warn+0xe8/0x1d0 [ 46.043607] ? md_ioctl+0x4023/0x59a0 [ 46.047484] __warn.cold+0x20/0x54 [ 46.051022] ? md_ioctl+0x4023/0x59a0 [ 46.054819] report_bug+0x263/0x2b0 [ 46.058538] do_error_trap+0x204/0x360 [ 46.062456] ? math_error+0x340/0x340 [ 46.066256] ? __mutex_lock+0x3cd/0x1300 [ 46.070307] ? selinux_ipv4_output+0x50/0x50 [ 46.074803] ? finish_task_switch+0x146/0x790 [ 46.079296] ? md_ioctl+0xc37/0x59a0 [ 46.083013] ? error_entry+0x76/0xd0 [ 46.086754] ? trace_hardirqs_off_caller+0x65/0x220 [ 46.091778] ? check_memory_region+0xc3/0x190 [ 46.096276] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.101129] do_invalid_op+0x1b/0x20 [ 46.104864] invalid_op+0x14/0x20 [ 46.108313] RIP: 0010:md_ioctl+0x4023/0x59a0 [ 46.112731] Code: fd ff ff c7 80 40 01 00 00 00 00 00 00 e9 dd eb ff ff 48 8d 85 38 fe ff ff 48 89 85 b8 fd ff ff e9 f5 da ff ff e8 ed 0f a0 fc <0f> 0b e9 f8 cc ff ff e8 e1 0f a0 fc 89 de bf 23 09 48 40 e8 55 11 [ 46.131642] RSP: 0018:ffff8880a45e7950 EFLAGS: 00010293 [ 46.137009] RAX: ffff88808fb9a580 RBX: 0000000000000932 RCX: ffffffff84cb0212 [ 46.144270] RDX: 0000000000000000 RSI: ffffffff84cb3523 RDI: 0000000000000007 [ 46.151544] RBP: ffff8880a45e7bc0 R08: ffff88808fb9a580 R09: ffffed10135d4852 [ 46.158822] R10: ffff8880a45e7940 R11: ffff88809aea428f R12: 0000000000000932 [ 46.166102] R13: ffff8880a6d1a040 R14: ffff88809aea40e8 R15: ffff88809aea4288 [ 46.173400] ? md_ioctl+0xd12/0x59a0 [ 46.177131] ? md_ioctl+0x4023/0x59a0 [ 46.180938] ? __might_sleep+0x95/0x190 [ 46.184910] ? add_new_disk+0x18e0/0x18e0 [ 46.189059] ? find_held_lock+0x35/0x130 [ 46.193131] ? avc_has_extended_perms+0x8e7/0x10f0 [ 46.198059] ? lock_downgrade+0x810/0x810 [ 46.202208] ? kasan_check_read+0x11/0x20 [ 46.206400] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.211940] ? avc_has_extended_perms+0xa78/0x10f0 [ 46.216887] ? avc_ss_reset+0x190/0x190 [ 46.220884] ? add_new_disk+0x18e0/0x18e0 [ 46.225039] blkdev_ioctl+0xc4b/0x1ae0 [ 46.228923] ? blkpg_ioctl+0xa90/0xa90 [ 46.232806] ? do_futex+0x178/0x1d50 [ 46.236517] ? __fget+0x340/0x540 [ 46.239957] ? ___might_sleep+0x163/0x280 [ 46.244126] block_ioctl+0xee/0x130 [ 46.247778] ? blkdev_fallocate+0x410/0x410 [ 46.252109] do_vfs_ioctl+0xd6e/0x1390 [ 46.256204] ? selinux_file_ioctl+0x46f/0x5e0 [ 46.260693] ? selinux_file_ioctl+0x125/0x5e0 [ 46.265221] ? ioctl_preallocate+0x210/0x210 [ 46.269635] ? selinux_file_mprotect+0x620/0x620 [ 46.274420] ? iterate_fd+0x360/0x360 [ 46.278242] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.283810] ? security_file_ioctl+0x93/0xc0 [ 46.288230] ksys_ioctl+0xab/0xd0 [ 46.291721] __x64_sys_ioctl+0x73/0xb0 [ 46.295605] do_syscall_64+0x103/0x610 [ 46.299501] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.304696] RIP: 0033:0x44a569 [ 46.307882] Code: e8 0c 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 7b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 46.326782] RSP: 002b:00007f8442797db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 46.334496] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 000000000044a569 [ 46.341769] RDX: 0000000000000000 RSI: 0000000000000932 RDI: 0000000000000004 [ 46.349046] RBP: 00000000006dbc30 R08: 0000000000000000 R09: 0000000000000000 [ 46.357257] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc3c [ 46.364520] R13: 00007ffdd813c34f R14: 00007f84427989c0 R15: 0000000000000000 [ 46.373171] Kernel Offset: disabled [ 46.381643] Rebooting in 86400 seconds..