[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.144' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.929128][ T6816] ------------[ cut here ]------------ [ 43.934776][ T6816] generic_make_request: Trying to write to read-only block-device nullb0 (partno 0) [ 43.945324][ T6816] WARNING: CPU: 1 PID: 6816 at block/blk-core.c:855 generic_make_request_checks+0x63f/0x17d0 [ 43.956082][ T6816] Kernel panic - not syncing: panic_on_warn set ... [ 43.962651][ T6816] CPU: 1 PID: 6816 Comm: syz-executor587 Not tainted 5.8.0-rc3-syzkaller #0 [ 43.971329][ T6816] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.981358][ T6816] Call Trace: [ 43.984624][ T6816] dump_stack+0x1f0/0x31e [ 43.988927][ T6816] panic+0x264/0x7a0 [ 43.992790][ T6816] ? __warn+0x102/0x250 [ 43.996918][ T6816] ? generic_make_request_checks+0x63f/0x17d0 [ 44.002953][ T6816] ? generic_make_request_checks+0x63f/0x17d0 [ 44.009037][ T6816] __warn+0x227/0x250 [ 44.013098][ T6816] ? generic_make_request_checks+0x63f/0x17d0 [ 44.019133][ T6816] report_bug+0x1b1/0x2e0 [ 44.023435][ T6816] handle_bug+0x42/0x80 [ 44.027560][ T6816] exc_invalid_op+0x16/0x40 [ 44.032033][ T6816] asm_exc_invalid_op+0x12/0x20 [ 44.036856][ T6816] RIP: 0010:generic_make_request_checks+0x63f/0x17d0 [ 44.043499][ T6816] Code: ac 05 00 00 4c 89 f8 48 c1 e8 03 8a 04 08 84 c0 0f 85 78 11 00 00 41 8b 17 48 c7 c7 c7 13 f4 88 4c 89 f6 31 c0 e8 d1 ac bd fd <0f> 0b e9 29 fc ff ff e8 55 e6 eb fd c6 05 58 67 e0 05 01 48 c7 c7 [ 44.063074][ T6816] RSP: 0018:ffffc90001277630 EFLAGS: 00010246 [ 44.069108][ T6816] RAX: 8ad064b753fe7f00 RBX: 0000000000000001 RCX: ffff888095d5e180 [ 44.077074][ T6816] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 44.085018][ T6816] RBP: ffffc900012776f0 R08: ffffffff815dc419 R09: ffffed1015d262c0 [ 44.092959][ T6816] R10: ffffed1015d262c0 R11: 0000000000000000 R12: ffff88809f86b948 [ 44.100901][ T6816] R13: 1ffff11013f0d729 R14: ffffc90001277690 R15: ffff8880a11635ac [ 44.108872][ T6816] ? vprintk_emit+0x339/0x3c0 [ 44.113528][ T6816] generic_make_request+0x36/0xab0 [ 44.118608][ T6816] ? rcu_lock_release+0x5/0x20 [ 44.123339][ T6816] submit_bio+0x1a4/0x620 [ 44.127642][ T6816] __block_write_full_page+0x8bb/0x1000 [ 44.133155][ T6816] ? mark_buffer_write_io_error+0x320/0x320 [ 44.139017][ T6816] ? blkdev_direct_IO+0xd0/0xd0 [ 44.143841][ T6816] __writepage+0x60/0x110 [ 44.148138][ T6816] write_cache_pages+0x8bb/0xda0 [ 44.153046][ T6816] ? generic_writepages+0xd0/0xd0 [ 44.158044][ T6816] ? locks_remove_posix+0x315/0x450 [ 44.163214][ T6816] generic_writepages+0x8f/0xd0 [ 44.168034][ T6816] ? blkdev_readpage+0x20/0x20 [ 44.172767][ T6816] do_writepages+0xda/0x1f0 [ 44.177243][ T6816] __filemap_fdatawrite_range+0x2a5/0x350 [ 44.182932][ T6816] filemap_write_and_wait_range+0xca/0x160 [ 44.188708][ T6816] __blkdev_put+0x111/0x7a0 [ 44.193179][ T6816] ? __mutex_unlock_slowpath+0x12d/0x590 [ 44.198781][ T6816] ? blkdev_put+0x2e0/0x3d0 [ 44.203254][ T6816] ? blkdev_open+0x2a0/0x2a0 [ 44.207811][ T6816] blkdev_close+0x7a/0xa0 [ 44.212108][ T6816] __fput+0x2f0/0x750 [ 44.216071][ T6816] task_work_run+0x137/0x1c0 [ 44.220629][ T6816] do_exit+0x601/0x1f80 [ 44.224754][ T6816] ? blkdev_common_ioctl+0x135e/0x1b00 [ 44.230185][ T6816] do_group_exit+0x161/0x2d0 [ 44.234747][ T6816] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 44.240780][ T6816] __do_sys_exit_group+0x13/0x20 [ 44.245686][ T6816] __se_sys_exit_group+0x10/0x10 [ 44.250592][ T6816] __x64_sys_exit_group+0x37/0x40 [ 44.255585][ T6816] do_syscall_64+0x73/0xe0 [ 44.259988][ T6816] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 44.265872][ T6816] RIP: 0033:0x43ee48 [ 44.269732][ T6816] Code: Bad RIP value. [ 44.273897][ T6816] RSP: 002b:00007fff7b3e2f08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 44.282275][ T6816] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ee48 [ 44.290220][ T6816] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 44.298164][ T6816] RBP: 00000000004be648 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 44.306108][ T6816] R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000001 [ 44.314179][ T6816] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 44.323626][ T6816] Kernel Offset: disabled [ 44.327998][ T6816] Rebooting in 86400 seconds..