[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 34.692907] random: sshd: uninitialized urandom read (32 bytes read) [ 35.089621] kauditd_printk_skb: 10 callbacks suppressed [ 35.089628] audit: type=1400 audit(1575512248.581:35): avc: denied { map } for pid=7034 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 [ 35.197243] random: sshd: uninitialized urandom read (32 bytes read) [ 35.733608] random: sshd: uninitialized urandom read (32 bytes read) [ 35.919838] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.1.50' (ECDSA) to the list of known hosts. [ 41.472926] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 41.592820] audit: type=1400 audit(1575512255.091:36): avc: denied { map } for pid=7047 comm="syz-executor301" path="/root/syz-executor301661781" 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 [ 41.596932] BUG: unable to handle kernel NULL pointer dereference at 0000000000000002 [ 41.627025] IP: mem_serial_out+0x70/0x90 [ 41.631063] PGD 94412067 P4D 94412067 PUD 89e2c067 PMD 0 [ 41.636586] Oops: 0002 [#1] PREEMPT SMP KASAN [ 41.641061] Modules linked in: [ 41.644233] CPU: 1 PID: 7047 Comm: syz-executor301 Not tainted 4.14.157-syzkaller #0 [ 41.652101] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.661447] task: ffff8880900ac700 task.stack: ffff888075fb8000 [ 41.667488] RIP: 0010:mem_serial_out+0x70/0x90 [ 41.672057] RSP: 0018:ffff888075fbf968 EFLAGS: 00010202 [ 41.677409] RAX: dffffc0000000000 RBX: 0000000000000002 RCX: 0000000000000000 [ 41.684663] RDX: 1ffffffff1490d50 RSI: 0000000000000002 RDI: ffffffff8a486a80 [ 41.691916] RBP: ffff888075fbf980 R08: ffff8880900ac700 R09: ffff8880900acfc8 [ 41.699180] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8a486a40 [ 41.706440] R13: 0000000000000001 R14: 0000000000000004 R15: ffff8880a4440ef8 [ 41.713693] FS: 000000000209b880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 [ 41.721925] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.727782] CR2: 0000000000000002 CR3: 0000000091664000 CR4: 00000000001406e0 [ 41.735032] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.742310] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.749556] Call Trace: [ 41.752130] serial8250_clear_fifos.part.0+0x3a/0xb0 [ 41.757220] serial8250_do_startup+0x3e8/0x1d80 [ 41.761867] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 41.766944] serial8250_startup+0x5c/0x80 [ 41.771075] uart_startup.part.0+0x2e9/0x720 [ 41.775461] uart_ioctl+0x12e9/0x2610 [ 41.779239] ? uart_port_activate+0x200/0x200 [ 41.783711] ? __might_fault+0x110/0x1d0 [ 41.787767] ? uart_port_activate+0x200/0x200 [ 41.792263] tty_ioctl+0x841/0x1320 [ 41.795908] ? tty_vhangup+0x30/0x30 [ 41.799604] ? __might_sleep+0x93/0xb0 [ 41.803470] ? tty_vhangup+0x30/0x30 [ 41.807163] do_vfs_ioctl+0x7ae/0x1060 [ 41.811031] ? selinux_file_mprotect+0x5d0/0x5d0 [ 41.815762] ? kmem_cache_free+0x244/0x2b0 [ 41.819974] ? ioctl_preallocate+0x1c0/0x1c0 [ 41.824359] ? putname+0xe0/0x120 [ 41.827789] ? do_sys_open+0x221/0x430 [ 41.831657] ? security_file_ioctl+0x7d/0xb0 [ 41.836059] ? security_file_ioctl+0x89/0xb0 [ 41.840455] SyS_ioctl+0x8f/0xc0 [ 41.843850] ? do_vfs_ioctl+0x1060/0x1060 [ 41.847984] do_syscall_64+0x1e8/0x640 [ 41.851851] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.856731] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 41.862042] RIP: 0033:0x440219 [ 41.865211] RSP: 002b:00007ffd309edc18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 41.872910] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440219 [ 41.880163] RDX: 0000000020000240 RSI: 000000000000541f RDI: 0000000000000003 [ 41.887416] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 41.894664] R10: 0000000000401b30 R11: 0000000000000246 R12: 0000000000401aa0 [ 41.901911] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 41.909164] Code: 24 d1 00 00 00 49 8d 7c 24 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 5c 24 40 <44> 88 2b 5b 41 5c 41 5d 5d c3 e8 d1 6c 37 fe eb c0 e8 2a 6d 37 [ 41.928283] RIP: mem_serial_out+0x70/0x90 RSP: ffff888075fbf968 [ 41.934359] CR2: 0000000000000002 [ 41.938538] ---[ end trace aa0c380ca4d65d80 ]--- [ 41.943340] Kernel panic - not syncing: Fatal exception [ 41.949997] Kernel Offset: disabled [ 41.953626] Rebooting in 86400 seconds..