Warning: Permanently added '10.128.1.50' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 52.011566][ T8117] ------------[ cut here ]------------ [ 52.018924][ T8117] generic_make_request: Trying to write to read-only block-device nullb0 (partno 0) [ 52.019139][ T8117] WARNING: CPU: 0 PID: 8117 at block/blk-core.c:803 generic_make_request_checks+0x636/0x1540 [ 52.031563][ T4086] kobject: 'nullb0' (000000008c6abf69): fill_kobj_path: path = '/devices/virtual/block/nullb0' [ 52.043444][ T8117] Kernel panic - not syncing: panic_on_warn set ... [ 52.043463][ T8117] CPU: 0 PID: 8117 Comm: syz-executor029 Not tainted 5.4.0-syzkaller #0 [ 52.043468][ T8117] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.043472][ T8117] Call Trace: [ 52.043496][ T8117] dump_stack+0x1fb/0x318 [ 52.043510][ T8117] panic+0x264/0x7a9 [ 52.043518][ T8117] ? __warn+0x105/0x210 [ 52.043533][ T8117] ? generic_make_request_checks+0x636/0x1540 [ 52.043543][ T8117] __warn+0x20e/0x210 [ 52.043552][ T8117] ? generic_make_request_checks+0x636/0x1540 [ 52.043563][ T8117] report_bug+0x1b6/0x2f0 [ 52.043581][ T8117] ? generic_make_request_checks+0x636/0x1540 [ 52.124066][ T8117] do_error_trap+0xd7/0x440 [ 52.130304][ T8117] do_invalid_op+0x36/0x40 [ 52.135530][ T8117] ? generic_make_request_checks+0x636/0x1540 [ 52.149537][ T8117] invalid_op+0x23/0x30 [ 52.153987][ T8117] RIP: 0010:generic_make_request_checks+0x636/0x1540 [ 52.160825][ T8117] Code: 5c 05 00 00 4c 89 f8 48 c1 e8 03 8a 04 08 84 c0 0f 85 f8 0e 00 00 41 8b 17 48 c7 c7 8d 3a c8 88 4c 89 f6 31 c0 e8 ba e9 cd fd <0f> 0b e9 2d fc ff ff e8 de d1 fb fd c6 05 4e f4 c4 05 01 48 c7 c7 [ 52.187835][ T8117] RSP: 0018:ffff88808ea97450 EFLAGS: 00010246 [ 52.210063][ T8117] RAX: 383e45848dfe2f00 RBX: 0000000000000001 RCX: ffff888097b1e500 [ 52.218032][ T8117] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 52.225986][ T8117] RBP: ffff88808ea97510 R08: ffffffff815fa3f4 R09: ffffed1015d4458a [ 52.235817][ T8117] R10: ffffed1015d4458a R11: 0000000000000000 R12: 1ffff110145bef21 [ 52.246300][ T8117] R13: ffff8880a2df7908 R14: ffff88808ea974b0 R15: ffff8880a27a155c [ 52.255944][ T8117] ? vprintk_emit+0x2d4/0x3a0 [ 52.260619][ T8117] ? rcu_lock_release+0xd/0x30 [ 52.265886][ T8117] generic_make_request+0x33/0x980 [ 52.270984][ T8117] ? rcu_lock_release+0xd/0x30 [ 52.280856][ T8117] submit_bio+0x26b/0x540 [ 52.285501][ T8117] ? wbc_account_cgroup_owner+0x110/0x340 [ 52.291854][ T8117] ? bio_associate_blkg_from_css+0x1c4/0x1d0 [ 52.298385][ T8117] submit_bh_wbc+0x619/0x700 [ 52.302989][ T8117] __block_write_full_page+0x943/0x1070 [ 52.308777][ T8117] ? blkdev_direct_IO+0xd0/0xd0 [ 52.314140][ T8117] ? mark_buffer_write_io_error+0x160/0x160 [ 52.320423][ T8117] block_write_full_page+0x1a4/0x220 [ 52.326243][ T8117] ? blkdev_direct_IO+0xd0/0xd0 [ 52.331089][ T8117] blkdev_writepage+0x24/0x30 [ 52.335751][ T8117] __writepage+0x63/0xd0 [ 52.339987][ T8117] write_cache_pages+0x94a/0xe70 [ 52.344996][ T8117] ? generic_writepages+0xd0/0xd0 [ 52.351268][ T8117] ? wbc_attach_and_unlock_inode+0x3a0/0x5d0 [ 52.357351][ T8117] generic_writepages+0x93/0xd0 [ 52.362399][ T8117] blkdev_writepages+0x1d/0x30 [ 52.367189][ T8117] ? blkdev_readpage+0x20/0x20 [ 52.372082][ T8117] do_writepages+0xfb/0x1f0 [ 52.377633][ T8117] ? wbc_attach_and_unlock_inode+0x3f0/0x5d0 [ 52.383931][ T8117] __filemap_fdatawrite_range+0x2c2/0x360 [ 52.389817][ T8117] filemap_write_and_wait+0xca/0x160 [ 52.396093][ T8117] __blkdev_put+0x1a2/0x6d0 [ 52.400707][ T8117] ? __mutex_unlock_slowpath+0x13c/0x5b0 [ 52.406752][ T8117] blkdev_put+0x2c8/0x3b0 [ 52.411218][ T8117] blkdev_close+0x7b/0xa0 [ 52.415649][ T8117] ? blkdev_open+0x2c0/0x2c0 [ 52.420374][ T8117] __fput+0x2e4/0x740 [ 52.424590][ T8117] ____fput+0x15/0x20 [ 52.428943][ T8117] task_work_run+0x17e/0x1b0 [ 52.434735][ T8117] do_exit+0x5c4/0x2020 [ 52.438980][ T8117] ? block_ioctl+0xbd/0x100 [ 52.444121][ T8117] ? check_preemption_disabled+0xb4/0x260 [ 52.450483][ T8117] do_group_exit+0x15c/0x2b0 [ 52.456051][ T8117] __do_sys_exit_group+0x17/0x20 [ 52.461062][ T8117] __se_sys_exit_group+0x14/0x20 [ 52.466105][ T8117] __x64_sys_exit_group+0x3b/0x40 [ 52.471476][ T8117] do_syscall_64+0xf7/0x1c0 [ 52.476083][ T8117] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.482154][ T8117] RIP: 0033:0x43edf8 [ 52.486160][ T8117] Code: Bad RIP value. [ 52.490308][ T8117] RSP: 002b:00007ffe99417018 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 52.499070][ T8117] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043edf8 [ 52.507031][ T8117] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 52.515727][ T8117] RBP: 00000000004be608 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 52.524329][ T8117] R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000001 [ 52.532380][ T8117] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 52.542295][ T8117] Kernel Offset: disabled [ 52.546850][ T8117] Rebooting in 86400 seconds..