[ 32.828903] audit: type=1800 audit(1556074265.014:33): pid=6917 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 [ 32.856317] audit: type=1800 audit(1556074265.024:34): pid=6917 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: [ 36.850380] random: sshd: uninitialized urandom read (32 bytes read) [ 37.302148] audit: type=1400 audit(1556074269.494:35): avc: denied { map } for pid=7089 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 [ 37.353113] random: sshd: uninitialized urandom read (32 bytes read) [ 37.910846] random: sshd: uninitialized urandom read (32 bytes read) [ 335.072896] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.50' (ECDSA) to the list of known hosts. [ 340.669000] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 340.797485] audit: type=1400 audit(1556074572.984:36): avc: denied { map } for pid=7101 comm="syz-executor079" path="/root/syz-executor079620391" 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 [ 340.808424] md: md0 stopped. [ 340.840823] md: md0 stopped. executing program [ 340.841419] ------------[ cut here ]------------ [ 340.848819] WARNING: CPU: 0 PID: 7131 at drivers/md/md.c:7165 md_ioctl+0x34bd/0x4bf0 [ 340.856690] Kernel panic - not syncing: panic_on_warn set ... [ 340.856690] [ 340.864033] CPU: 0 PID: 7131 Comm: syz-executor079 Not tainted 4.14.113 #3 [ 340.871033] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 340.880476] Call Trace: [ 340.883127] dump_stack+0x138/0x19c [ 340.886749] panic+0x1f2/0x438 [ 340.889934] ? add_taint.cold+0x16/0x16 [ 340.893918] ? md_ioctl+0x34bd/0x4bf0 [ 340.897712] ? md_ioctl+0x34bd/0x4bf0 [ 340.901502] __warn.cold+0x2f/0x34 [ 340.905089] ? ist_end_non_atomic+0x10/0x10 [ 340.909402] ? md_ioctl+0x34bd/0x4bf0 [ 340.913190] report_bug+0x216/0x254 [ 340.916803] do_error_trap+0x1bb/0x310 [ 340.920679] ? math_error+0x360/0x360 [ 340.924526] ? __mutex_lock+0x36a/0x1470 [ 340.928573] ? selinux_ipv4_output+0x50/0x50 [ 340.932967] ? md_ioctl+0x9fe/0x4bf0 [ 340.936667] ? __lock_acquire+0x5f9/0x45e0 [ 340.940965] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 340.945811] do_invalid_op+0x1b/0x20 [ 340.949517] invalid_op+0x1b/0x40 [ 340.952974] RIP: 0010:md_ioctl+0x34bd/0x4bf0 [ 340.957378] RSP: 0018:ffff8880990dfa20 EFLAGS: 00010297 [ 340.962733] RAX: ffff8880a1356480 RBX: 0000000000000932 RCX: 0000000000000000 [ 340.970091] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 [ 340.977356] RBP: ffff8880990dfc68 R08: ffff888215e1d408 R09: ffffffff88c83498 [ 340.984735] R10: ffff8880990dfa10 R11: ffff8880a1356480 R12: ffff888215e1d400 [ 340.992017] R13: ffff88821840c140 R14: ffff888215e1d428 R15: ffff888215e1d5c8 [ 340.999310] ? find_held_lock+0x35/0x130 [ 341.003376] ? add_new_disk+0x1610/0x1610 [ 341.007519] ? lock_downgrade+0x6e0/0x6e0 [ 341.011769] ? avc_has_extended_perms+0x8ec/0xe40 [ 341.016835] ? avc_ss_reset+0x110/0x110 [ 341.020797] ? __lock_acquire+0x5f9/0x45e0 [ 341.025019] ? add_new_disk+0x1610/0x1610 [ 341.029147] blkdev_ioctl+0x983/0x1880 [ 341.033057] ? blkpg_ioctl+0x980/0x980 [ 341.036977] ? __might_sleep+0x93/0xb0 [ 341.040858] ? __fget+0x210/0x370 [ 341.044302] block_ioctl+0xde/0x120 [ 341.047964] ? blkdev_fallocate+0x3b0/0x3b0 [ 341.052285] do_vfs_ioctl+0x7b9/0x1070 [ 341.056155] ? selinux_file_mprotect+0x5d0/0x5d0 [ 341.060896] ? lock_downgrade+0x6e0/0x6e0 [ 341.065034] ? ioctl_preallocate+0x1c0/0x1c0 [ 341.069443] ? __fget+0x237/0x370 [ 341.072912] ? security_file_ioctl+0x83/0xc0 [ 341.077319] ? security_file_ioctl+0x8f/0xc0 [ 341.081718] SyS_ioctl+0x8f/0xc0 [ 341.085082] ? do_vfs_ioctl+0x1070/0x1070 [ 341.089228] do_syscall_64+0x1eb/0x630 [ 341.093112] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 341.097944] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 341.103124] RIP: 0033:0x446769 [ 341.106302] RSP: 002b:00007f079fd78db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 341.113997] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 0000000000446769 [ 341.121255] RDX: 0000000000000000 RSI: 0000000000000932 RDI: 0000000000000004 [ 341.128534] RBP: 00000000006dbc30 R08: 00007f079fd79700 R09: 0000000000000000 [ 341.135803] R10: 00007f079fd79700 R11: 0000000000000246 R12: 00000000006dbc3c [ 341.143065] R13: 00007ffc1b51c4af R14: 00007f079fd799c0 R15: 0000000000000001 [ 341.150974] Kernel Offset: disabled [ 341.154660] Rebooting in 86400 seconds..