[ 32.084582] audit: type=1800 audit(1556140946.529:33): pid=6870 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 [ 32.108366] audit: type=1800 audit(1556140946.529:34): pid=6870 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 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 38.603469] random: sshd: uninitialized urandom read (32 bytes read) [ 39.296271] audit: type=1400 audit(1556140953.739:35): avc: denied { map } for pid=7045 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 [ 39.348103] random: sshd: uninitialized urandom read (32 bytes read) [ 39.989395] random: sshd: uninitialized urandom read (32 bytes read) [ 40.195045] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.202' (ECDSA) to the list of known hosts. [ 45.834530] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 45.953958] audit: type=1400 audit(1556140960.399:36): avc: denied { map } for pid=7057 comm="syz-executor213" path="/root/syz-executor213629158" 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 [ 45.965693] ------------[ cut here ]------------ [ 45.985119] WARNING: CPU: 1 PID: 7068 at drivers/md/md.c:7165 md_ioctl+0x34bd/0x4bf0 [ 45.992995] Kernel panic - not syncing: panic_on_warn set ... [ 45.992995] [ 46.000349] CPU: 1 PID: 7068 Comm: syz-executor213 Not tainted 4.14.113 #3 [ 46.007340] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.016684] Call Trace: [ 46.019260] dump_stack+0x138/0x19c [ 46.022878] panic+0x1f2/0x438 [ 46.026050] ? add_taint.cold+0x16/0x16 [ 46.030028] ? md_ioctl+0x34bd/0x4bf0 [ 46.033834] ? md_ioctl+0x34bd/0x4bf0 [ 46.037628] __warn.cold+0x2f/0x34 [ 46.041169] ? ist_end_non_atomic+0x10/0x10 [ 46.045559] ? md_ioctl+0x34bd/0x4bf0 [ 46.049346] report_bug+0x216/0x254 [ 46.052958] do_error_trap+0x1bb/0x310 [ 46.056833] ? math_error+0x360/0x360 [ 46.060628] ? __mutex_lock+0x36a/0x1470 [ 46.064682] ? selinux_ipv4_output+0x50/0x50 [ 46.069090] ? md_ioctl+0x9fe/0x4bf0 [ 46.072806] ? __lock_acquire+0x5f9/0x45e0 [ 46.077038] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.081900] do_invalid_op+0x1b/0x20 [ 46.085599] invalid_op+0x1b/0x40 [ 46.089035] RIP: 0010:md_ioctl+0x34bd/0x4bf0 [ 46.093418] RSP: 0018:ffff88809601fa20 EFLAGS: 00010297 [ 46.098759] RAX: ffff88808ffc8180 RBX: 0000000000000932 RCX: 0000000000000000 [ 46.106031] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 [ 46.113375] RBP: ffff88809601fc68 R08: ffff888215dcd4c8 R09: ffffffff88c83498 [ 46.120640] R10: ffff88809601fa10 R11: ffff88808ffc8180 R12: ffff888215dcd4c0 [ 46.127922] R13: ffff88821a2f4700 R14: ffff888215dcd4e8 R15: ffff888215dcd688 [ 46.135203] ? find_held_lock+0x35/0x130 [ 46.139255] ? add_new_disk+0x1610/0x1610 [ 46.143405] ? lock_downgrade+0x6e0/0x6e0 [ 46.147557] ? avc_has_extended_perms+0x8ec/0xe40 executing program executing program executing program [ 46.152396] ? futex_wake+0x134/0x430 [ 46.156201] ? avc_ss_reset+0x110/0x110 [ 46.160180] ? __lock_acquire+0x5f9/0x45e0 [ 46.164421] ? do_futex+0x152/0x1a30 [ 46.168128] ? add_new_disk+0x1610/0x1610 [ 46.172270] blkdev_ioctl+0x983/0x1880 [ 46.176259] ? blkpg_ioctl+0x980/0x980 [ 46.180167] ? __might_sleep+0x93/0xb0 [ 46.184057] ? __fget+0x210/0x370 [ 46.187524] block_ioctl+0xde/0x120 [ 46.191158] ? blkdev_fallocate+0x3b0/0x3b0 [ 46.195498] do_vfs_ioctl+0x7b9/0x1070 [ 46.199392] ? selinux_file_mprotect+0x5d0/0x5d0 [ 46.204151] ? lock_downgrade+0x6e0/0x6e0 [ 46.208289] ? ioctl_preallocate+0x1c0/0x1c0 [ 46.212682] ? __fget+0x237/0x370 [ 46.216126] ? security_file_ioctl+0x83/0xc0 [ 46.220515] ? security_file_ioctl+0x8f/0xc0 [ 46.224926] SyS_ioctl+0x8f/0xc0 [ 46.228275] ? do_vfs_ioctl+0x1070/0x1070 [ 46.232440] do_syscall_64+0x1eb/0x630 [ 46.236341] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.241233] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 46.246444] RIP: 0033:0x446749 [ 46.249617] RSP: 002b:00007ff093c46db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 46.257325] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446749 [ 46.264584] RDX: 0000000000000000 RSI: 0000000000000932 RDI: 0000000000000003 [ 46.271839] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 46.279089] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 46.286344] R13: 00007ffedf825cef R14: 00007ff093c479c0 R15: 000000000000002d [ 46.294480] Kernel Offset: disabled [ 46.298154] Rebooting in 86400 seconds..