[....] Starting OpenBSD Secure Shell server: sshd[ 12.370258] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 46.622878] random: sshd: uninitialized urandom read (32 bytes read) [ 47.008940] audit: type=1400 audit(1540377948.446:6): avc: denied { map } for pid=1782 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 [ 47.056838] random: sshd: uninitialized urandom read (32 bytes read) [ 47.502339] random: sshd: uninitialized urandom read (32 bytes read) [ 47.654517] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.2' (ECDSA) to the list of known hosts. [ 53.473282] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 53.583605] audit: type=1400 audit(1540377955.026:7): avc: denied { map } for pid=1800 comm="syz-executor094" path="/root/syz-executor094393705" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 53.623880] ------------[ cut here ]------------ [ 53.628675] WARNING: CPU: 0 PID: 22 at fs/direct-io.c:293 dio_complete+0x578/0x800 [ 53.636359] Kernel panic - not syncing: panic_on_warn set ... [ 53.636359] [ 53.643704] CPU: 0 PID: 22 Comm: kworker/0:1 Not tainted 4.14.78+ #24 [ 53.650264] Workqueue: dio/sda1 dio_aio_complete_work [ 53.655430] Call Trace: [ 53.657997] dump_stack+0xb9/0x11b [ 53.661514] ? dio_complete+0x4c0/0x800 [ 53.665468] panic+0x1bf/0x3a4 [ 53.668637] ? add_taint.cold.4+0x16/0x16 [ 53.672763] ? __probe_kernel_read+0x163/0x1c0 [ 53.677344] ? dio_complete+0x578/0x800 [ 53.681311] __warn.cold.7+0x148/0x185 [ 53.685176] ? dio_complete+0x578/0x800 [ 53.689125] report_bug+0x1f7/0x26c [ 53.692746] do_error_trap+0x1ba/0x2c0 [ 53.696608] ? math_error+0x2d0/0x2d0 [ 53.700409] ? clear_shadow_entry+0x190/0x190 [ 53.704888] ? debug_object_deactivate+0x214/0x340 [ 53.709793] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 53.714628] invalid_op+0x18/0x40 [ 53.718054] RIP: 0010:dio_complete+0x578/0x800 [ 53.722609] RSP: 0018:ffff8801dab5fd10 EFLAGS: 00010297 [ 53.727945] RAX: ffff8801daae2f00 RBX: ffff8801c34bc680 RCX: 0000000000000000 [ 53.735192] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801daae2f24 [ 53.742437] RBP: 0000000000010000 R08: 1ffff1003a0b1a00 R09: 0000000000000000 [ 53.749684] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c2c62c60 [ 53.756975] R13: 0000000000010000 R14: 0000000000000003 R15: ffff8801c34bc718 [ 53.764248] ? ext4_update_bh_state+0xe0/0xe0 [ 53.768727] process_one_work+0x86e/0x15c0 [ 53.772947] ? pwq_dec_nr_in_flight+0x2b0/0x2b0 [ 53.777600] worker_thread+0xdc/0x1000 [ 53.781468] ? process_one_work+0x15c0/0x15c0 [ 53.785941] ? process_one_work+0x15c0/0x15c0 [ 53.790410] kthread+0x348/0x420 [ 53.793751] ? kthread_create_on_node+0xe0/0xe0 [ 53.798404] ret_from_fork+0x3a/0x50 [ 53.802403] Kernel Offset: 0x18600000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 53.813312] Rebooting in 86400 seconds..