random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
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
BUG: unable to handle kernel NULL pointer dereference at 0000000000000003
IP: writew arch/x86/include/asm/io.h:66 [inline]
IP: mem16_serial_out+0x6c/0x90 drivers/tty/serial/8250/8250_port.c:414
PGD 907da067 P4D 907da067 PUD 79451067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 7037 Comm: syz-executor408 Not tainted 4.14.158-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88808ff56640 task.stack: ffff88809f5b8000
RIP: 0010:writew arch/x86/include/asm/io.h:66 [inline]
RIP: 0010:mem16_serial_out+0x6c/0x90 drivers/tty/serial/8250/8250_port.c:414
RSP: 0018:ffff88809f5bf988 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 1ffffffff14911af RSI: 0000000000000003 RDI: ffffffff8a488d78
RBP: ffff88809f5bf9a0 R08: ffff88808ff56640 R09: ffff88808ff56f08
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000000000bf
R13: ffffffff8a488d38 R14: 000000000000000a R15: ffffffff8a488d88
FS:  0000000000f20880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000003 CR3: 0000000097a2e000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 serial_port_out include/linux/serial_core.h:265 [inline]
 serial8250_do_startup+0x1120/0x1d80 drivers/tty/serial/8250/8250_port.c:2140
 serial8250_startup+0x5c/0x80 drivers/tty/serial/8250/8250_port.c:2411
 uart_port_startup drivers/tty/serial/serial_core.c:231 [inline]
 uart_startup.part.0+0x2e9/0x720 drivers/tty/serial/serial_core.c:270
 uart_startup drivers/tty/serial/serial_core.c:267 [inline]
 uart_set_info drivers/tty/serial/serial_core.c:1010 [inline]
 uart_set_info_user drivers/tty/serial/serial_core.c:1038 [inline]
 uart_ioctl+0x12e9/0x2610 drivers/tty/serial/serial_core.c:1361
 tty_ioctl+0x841/0x1320 drivers/tty/tty_io.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x440219
RSP: 002b:00007fff7812b688 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440219
RDX: 0000000020000240 RSI: 000000000000541f RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000401b30 R11: 0000000000000246 R12: 0000000000401aa0
R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000
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 
RIP: writew arch/x86/include/asm/io.h:66 [inline] RSP: ffff88809f5bf988
RIP: mem16_serial_out+0x6c/0x90 drivers/tty/serial/8250/8250_port.c:414 RSP: ffff88809f5bf988
CR2: 0000000000000003
---[ end trace 771de5296e2986c9 ]---