[ 42.649029][ T23] audit: type=1800 audit(1574957617.860:30): pid=7904 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.205' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 53.410651][ T23] audit: type=1804 audit(1574957628.640:31): pid=8055 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor737" name="/root/file0" dev="sda1" ino=16484 res=1 [ 53.434161][ T8055] ------------[ cut here ]------------ [ 53.440229][ T8055] generic_make_request: Trying to write to read-only block-device loop0 (partno 0) [ 53.450147][ T8055] WARNING: CPU: 0 PID: 8055 at block/blk-core.c:803 generic_make_request_checks+0x636/0x1540 [ 53.460572][ T8055] Kernel panic - not syncing: panic_on_warn set ... [ 53.467155][ T8055] CPU: 0 PID: 8055 Comm: syz-executor737 Not tainted 5.4.0-syzkaller #0 [ 53.475550][ T8055] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.485627][ T8055] Call Trace: [ 53.488920][ T8055] dump_stack+0x1fb/0x318 [ 53.493358][ T8055] panic+0x264/0x7a9 [ 53.497239][ T8055] ? __warn+0x105/0x210 [ 53.501393][ T8055] ? generic_make_request_checks+0x636/0x1540 [ 53.507441][ T8055] __warn+0x20e/0x210 [ 53.511576][ T8055] ? generic_make_request_checks+0x636/0x1540 [ 53.517628][ T8055] report_bug+0x1b6/0x2f0 [ 53.521938][ T8055] ? generic_make_request_checks+0x636/0x1540 [ 53.527988][ T8055] do_error_trap+0xd7/0x440 [ 53.532474][ T8055] do_invalid_op+0x36/0x40 [ 53.536876][ T8055] ? generic_make_request_checks+0x636/0x1540 [ 53.542926][ T8055] invalid_op+0x23/0x30 [ 53.547077][ T8055] RIP: 0010:generic_make_request_checks+0x636/0x1540 [ 53.553738][ T8055] 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 91 56 61 88 4c 89 f6 31 c0 e8 aa 7f 10 fe <0f> 0b e9 2d fc ff ff e8 1e 66 3e fe c6 05 74 ef a4 05 01 48 c7 c7 [ 53.573324][ T8055] RSP: 0018:ffff88809890f450 EFLAGS: 00010246 [ 53.579379][ T8055] RAX: 5362c5cef1586a00 RBX: 0000000000000001 RCX: ffff8880a9362340 [ 53.587329][ T8055] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 53.595292][ T8055] RBP: ffff88809890f510 R08: ffffffff815deeb4 R09: ffffed1015d465d8 [ 53.604025][ T8055] R10: ffffed1015d465d8 R11: 0000000000000000 R12: 1ffff1101438c661 [ 53.611979][ T8055] R13: ffff8880a1c63308 R14: ffff88809890f4b0 R15: ffff8880a378655c [ 53.619963][ T8055] ? vprintk_emit+0x2d4/0x3a0 [ 53.624631][ T8055] ? rcu_lock_release+0xd/0x30 [ 53.629397][ T8055] generic_make_request+0x33/0x980 [ 53.634496][ T8055] ? rcu_lock_release+0xd/0x30 [ 53.639338][ T8055] submit_bio+0x26b/0x540 [ 53.643651][ T8055] ? wbc_account_cgroup_owner+0x110/0x340 [ 53.649347][ T8055] ? bio_associate_blkg_from_css+0x1c4/0x1d0 [ 53.655391][ T8055] submit_bh_wbc+0x619/0x700 [ 53.659963][ T8055] __block_write_full_page+0x943/0x1070 [ 53.665507][ T8055] ? blkdev_direct_IO+0xd0/0xd0 [ 53.670349][ T8055] ? mark_buffer_write_io_error+0x160/0x160 [ 53.676237][ T8055] block_write_full_page+0x1a4/0x220 [ 53.681504][ T8055] ? blkdev_direct_IO+0xd0/0xd0 [ 53.686336][ T8055] blkdev_writepage+0x24/0x30 [ 53.690991][ T8055] __writepage+0x63/0xd0 [ 53.695235][ T8055] write_cache_pages+0x94a/0xe70 [ 53.700151][ T8055] ? generic_writepages+0xd0/0xd0 [ 53.705278][ T8055] generic_writepages+0x93/0xd0 [ 53.710108][ T8055] blkdev_writepages+0x1d/0x30 [ 53.714860][ T8055] ? blkdev_readpage+0x20/0x20 [ 53.719613][ T8055] do_writepages+0xfb/0x1f0 [ 53.724095][ T8055] ? wbc_attach_and_unlock_inode+0x3f0/0x5d0 [ 53.730055][ T8055] __filemap_fdatawrite_range+0x2c2/0x360 [ 53.735761][ T8055] filemap_write_and_wait+0xca/0x160 [ 53.741028][ T8055] __blkdev_put+0x1a2/0x6d0 [ 53.745657][ T8055] ? __mutex_unlock_slowpath+0x13c/0x5b0 [ 53.751325][ T8055] blkdev_put+0x2c8/0x3b0 [ 53.755667][ T8055] blkdev_close+0x7b/0xa0 [ 53.759987][ T8055] ? blkdev_open+0x2c0/0x2c0 [ 53.764617][ T8055] __fput+0x2e4/0x740 [ 53.768603][ T8055] ____fput+0x15/0x20 [ 53.772569][ T8055] task_work_run+0x17e/0x1b0 [ 53.777162][ T8055] do_exit+0x5cc/0x20f0 [ 53.781670][ T8055] ? __fpregs_load_activate+0x195/0x220 [ 53.787212][ T8055] do_group_exit+0x15c/0x2b0 [ 53.791790][ T8055] __do_sys_exit_group+0x17/0x20 [ 53.796704][ T8055] __se_sys_exit_group+0x14/0x20 [ 53.801636][ T8055] __x64_sys_exit_group+0x3b/0x40 [ 53.806662][ T8055] do_syscall_64+0xf7/0x1c0 [ 53.811155][ T8055] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.817048][ T8055] RIP: 0033:0x442c38 [ 53.820931][ T8055] Code: 00 00 ea dc 40 00 00 00 00 00 c8 de 40 00 00 00 00 00 ea dc 40 00 00 00 00 00 ea dc 40 00 00 00 00 00 ea dc 40 00 00 00 00 00 dc 40 00 00 00 00 00 ea dc 40 00 00 00 00 00 ea dc 40 00 00 00 [ 53.840523][ T8055] RSP: 002b:00007ffd3dee78e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 53.848920][ T8055] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442c38 [ 53.856876][ T8055] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 53.864832][ T8055] RBP: 00000000004c2548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 53.872788][ T8055] R10: 00000000004002e0 R11: 0000000000000246 R12: 0000000000000001 [ 53.880739][ T8055] R13: 00000000006d41a0 R14: 0000000000000000 R15: 0000000000000000 [ 53.889658][ T8055] Kernel Offset: disabled [ 53.894069][ T8055] Rebooting in 86400 seconds..