[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 32.323531] random: sshd: uninitialized urandom read (32 bytes read)
Debian GNU/Linux 7 syzkaller ttyS0
syzkaller login: [ 32.549863] kauditd_printk_skb: 11 callbacks suppressed
[ 32.549871] audit: type=1400 audit(1575846695.950:35): avc: denied { map } for pid=7024 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
[ 32.605354] random: sshd: uninitialized urandom read (32 bytes read)
[ 33.139402] random: sshd: uninitialized urandom read (32 bytes read)
[ 47.856792] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.67' (ECDSA) to the list of known hosts.
[ 53.356761] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[ 53.473569] audit: type=1400 audit(1575846716.880:36): avc: denied { map } for pid=7037 comm="syz-executor408" path="/root/syz-executor408174009" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
[ 53.478112] BUG: unable to handle kernel NULL pointer dereference at 0000000000000003
[ 53.507894] IP: mem16_serial_out+0x6c/0x90
[ 53.512109] PGD 907da067 P4D 907da067 PUD 79451067 PMD 0
[ 53.517629] Oops: 0002 [#1] PREEMPT SMP KASAN
[ 53.522106] Modules linked in:
[ 53.525293] CPU: 0 PID: 7037 Comm: syz-executor408 Not tainted 4.14.158-syzkaller #0
[ 53.533267] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 53.543390] task: ffff88808ff56640 task.stack: ffff88809f5b8000
[ 53.549445] RIP: 0010:mem16_serial_out+0x6c/0x90
[ 53.554175] RSP: 0018:ffff88809f5bf988 EFLAGS: 00010206
[ 53.559519] RAX: dffffc0000000000 RBX: 0000000000000003 RCX: 0000000000000000
[ 53.566768] RDX: 1ffffffff14911af RSI: 0000000000000003 RDI: ffffffff8a488d78
[ 53.574122] RBP: ffff88809f5bf9a0 R08: ffff88808ff56640 R09: ffff88808ff56f08
[ 53.581416] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000000000bf
[ 53.588676] R13: ffffffff8a488d38 R14: 000000000000000a R15: ffffffff8a488d88
[ 53.595928] FS: 0000000000f20880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
[ 53.604158] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 53.610021] CR2: 0000000000000003 CR3: 0000000097a2e000 CR4: 00000000001406f0
[ 53.617288] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 53.624547] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 53.631797] Call Trace:
[ 53.634369] serial8250_do_startup+0x1120/0x1d80
[ 53.639118] ? _raw_spin_unlock_irqrestore+0x6b/0xe0
[ 53.644204] serial8250_startup+0x5c/0x80
[ 53.648349] uart_startup.part.0+0x2e9/0x720
[ 53.652735] uart_ioctl+0x12e9/0x2610
[ 53.656515] ? uart_port_activate+0x200/0x200
[ 53.661002] ? __might_fault+0x110/0x1d0
[ 53.665060] ? uart_port_activate+0x200/0x200
[ 53.669541] tty_ioctl+0x841/0x1320
[ 53.673151] ? tty_vhangup+0x30/0x30
[ 53.676850] ? __might_sleep+0x93/0xb0
[ 53.680717] ? tty_vhangup+0x30/0x30
[ 53.684411] do_vfs_ioctl+0x7ae/0x1060
[ 53.688288] ? selinux_file_mprotect+0x5d0/0x5d0
[ 53.693024] ? kmem_cache_free+0x244/0x2b0
[ 53.697245] ? ioctl_preallocate+0x1c0/0x1c0
[ 53.701630] ? putname+0xe0/0x120
[ 53.705076] ? do_sys_open+0x221/0x430
[ 53.709049] ? security_file_ioctl+0x7d/0xb0
[ 53.713489] ? security_file_ioctl+0x89/0xb0
[ 53.717885] SyS_ioctl+0x8f/0xc0
[ 53.721235] ? do_vfs_ioctl+0x1060/0x1060
[ 53.725372] do_syscall_64+0x1e8/0x640
[ 53.729238] ? trace_hardirqs_off_thunk+0x1a/0x1c
[ 53.734061] entry_SYSCALL_64_after_hwframe+0x42/0xb7
[ 53.739246] RIP: 0033:0x440219
[ 53.742433] RSP: 002b:00007fff7812b688 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 53.750121] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440219
[ 53.757367] RDX: 0000000020000240 RSI: 000000000000541f RDI: 0000000000000003
[ 53.764617] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[ 53.771960] R10: 0000000000401b30 R11: 0000000000000246 R12: 0000000000401aa0
[ 53.779207] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000
[ 53.786457] Code: 0f b6 8d d1 00 00 00 49 8d 7d 40 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 d3 e3 80 3c 02 00 75 19 48 63 db 49 03 5d 40 <66> 44 89 23 5b 41 5c 41 5d 5d c3 e8 64 65 37 fe eb c2 e8 bd 65
[ 53.805555] RIP: mem16_serial_out+0x6c/0x90 RSP: ffff88809f5bf988
[ 53.811787] CR2: 0000000000000003
[ 53.816005] ---[ end trace 771de5296e2986c9 ]---
[ 53.820854] Kernel panic - not syncing: Fatal exception
[ 53.827499] Kernel Offset: disabled
[ 53.831173] Rebooting in 86400 seconds..