[ 34.144638] audit: type=1800 audit(1551606336.715:27): pid=7424 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 34.172791] audit: type=1800 audit(1551606336.715:28): pid=7424 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 34.952752] audit: type=1800 audit(1551606337.585:29): pid=7424 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 34.978346] audit: type=1800 audit(1551606337.585:30): pid=7424 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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 '10.128.10.34' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 60.836701] ------------[ cut here ]------------ [ 60.842288] generic_make_request: Trying to write to read-only block-device loop0 (partno 0) [ 60.851136] WARNING: CPU: 1 PID: 7584 at block/blk-core.c:802 generic_make_request_checks+0x1c8a/0x2140 [ 60.860652] Kernel panic - not syncing: panic_on_warn set ... [ 60.866522] CPU: 1 PID: 7584 Comm: syz-executor520 Not tainted 5.0.0-rc8+ #3 [ 60.873686] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.883022] Call Trace: [ 60.885697] dump_stack+0x172/0x1f0 [ 60.889319] ? generic_make_request_checks+0x1bb0/0x2140 [ 60.894758] panic+0x2cb/0x65c [ 60.897935] ? __warn_printk+0xf3/0xf3 [ 60.901812] ? generic_make_request_checks+0x1c8a/0x2140 [ 60.907248] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.912768] ? __warn.cold+0x5/0x45 [ 60.916416] ? __warn+0xe8/0x1d0 [ 60.919767] ? generic_make_request_checks+0x1c8a/0x2140 [ 60.925196] __warn.cold+0x20/0x45 [ 60.928726] ? vprintk_emit+0x1ce/0x6d0 [ 60.932682] ? generic_make_request_checks+0x1c8a/0x2140 [ 60.938118] report_bug+0x263/0x2b0 [ 60.941732] do_error_trap+0x11b/0x200 [ 60.945602] do_invalid_op+0x37/0x50 [ 60.949355] ? generic_make_request_checks+0x1c8a/0x2140 [ 60.954799] invalid_op+0x14/0x20 [ 60.958236] RIP: 0010:generic_make_request_checks+0x1c8a/0x2140 [ 60.964274] Code: 00 00 44 8b ab dc 04 00 00 48 8d b5 78 ff ff ff 4c 89 ff e8 98 7c 05 00 48 c7 c7 80 a3 a0 87 48 89 c6 44 89 ea e8 c4 be 2b fe <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 [ 60.983157] RSP: 0018:ffff88808d726f80 EFLAGS: 00010286 [ 60.988501] RAX: 0000000000000000 RBX: ffff8880a3cc4140 RCX: 0000000000000000 [ 60.995755] RDX: 0000000000000000 RSI: ffffffff815a9066 RDI: ffffed1011ae4de2 [ 61.003012] RBP: ffff88808d727080 R08: ffff888092b94100 R09: ffffed1015d23ef9 [ 61.010270] R10: ffffed1015d23ef8 R11: ffff8880ae91f7c7 R12: ffff888090c55e88 [ 61.017589] R13: 0000000000000000 R14: 0000000000000001 R15: ffff888090c55e80 [ 61.024862] ? vprintk_func+0x86/0x189 [ 61.028742] ? trace_event_raw_event_block_rq_requeue+0x640/0x640 [ 61.034960] ? mark_held_locks+0x100/0x100 [ 61.039180] generic_make_request+0x24c/0x12d0 [ 61.043752] ? find_held_lock+0x35/0x130 [ 61.047797] ? bio_associate_blkg_from_css+0x513/0x9d0 [ 61.053056] ? blk_queue_enter+0xe90/0xe90 [ 61.057275] ? lock_downgrade+0x810/0x810 [ 61.061411] submit_bio+0xba/0x480 [ 61.064932] ? submit_bio+0xba/0x480 [ 61.068735] ? generic_make_request+0x12d0/0x12d0 [ 61.073566] ? bio_reset+0x3b0/0x3b0 [ 61.077265] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 61.082265] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 61.087433] ? wbc_account_io+0x17e/0x2a0 [ 61.091572] submit_bh_wbc+0x5f7/0x7f0 [ 61.095449] __block_write_full_page+0x771/0x1020 [ 61.100271] ? check_disk_change+0x140/0x140 [ 61.104671] block_write_full_page+0x21f/0x270 [ 61.109234] ? check_disk_change+0x140/0x140 [ 61.113626] blkdev_writepage+0x25/0x30 [ 61.117589] __writepage+0x67/0xe0 [ 61.121116] write_cache_pages+0x8af/0x1560 [ 61.125421] ? __lock_acquire+0x53b/0x4700 [ 61.129643] ? __wb_update_bandwidth+0x670/0x670 [ 61.134389] ? clear_page_dirty_for_io+0xff0/0xff0 [ 61.139302] ? __lock_acquire+0x53b/0x4700 [ 61.143523] ? __lock_acquire+0x53b/0x4700 [ 61.147744] generic_writepages+0xed/0x160 [ 61.151964] ? write_cache_pages+0x1560/0x1560 [ 61.156530] ? 0xffffffff81000000 [ 61.159969] ? wbc_attach_and_unlock_inode+0x51a/0x930 [ 61.165230] ? find_held_lock+0x35/0x130 [ 61.169274] ? blkdev_readpages+0x40/0x40 [ 61.173410] blkdev_writepages+0x1e/0x30 [ 61.177461] do_writepages+0xfc/0x2a0 [ 61.181251] ? page_writeback_cpu_online+0x20/0x20 [ 61.186171] ? do_raw_spin_lock+0x12a/0x2e0 [ 61.190485] ? kasan_check_read+0x11/0x20 [ 61.194622] ? do_raw_spin_unlock+0x57/0x270 [ 61.199013] ? _raw_spin_unlock+0x2d/0x50 [ 61.203146] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 61.208670] ? wbc_attach_and_unlock_inode+0x5c4/0x930 [ 61.213931] __filemap_fdatawrite_range+0x26d/0x340 [ 61.218971] ? delete_from_page_cache_batch+0x10e0/0x10e0 [ 61.224505] ? lockdep_hardirqs_on+0x415/0x5d0 [ 61.229074] filemap_write_and_wait+0x47/0xd0 [ 61.233903] __blkdev_put+0x204/0x810 [ 61.237689] ? bd_set_size+0xb0/0xb0 [ 61.241493] ? wait_for_completion+0x440/0x440 [ 61.246162] blkdev_put+0x98/0x560 [ 61.249693] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 61.255219] ? blkdev_put+0x560/0x560 [ 61.259002] blkdev_close+0x8b/0xb0 [ 61.262618] __fput+0x2df/0x8d0 [ 61.265932] ____fput+0x16/0x20 [ 61.269255] task_work_run+0x14a/0x1c0 [ 61.273145] do_exit+0x92c/0x2fd0 [ 61.276584] ? get_signal+0x331/0x1d50 [ 61.280453] ? mm_update_next_owner+0x660/0x660 [ 61.285113] ? kasan_check_read+0x11/0x20 [ 61.289313] ? _raw_spin_unlock_irq+0x28/0x90 [ 61.293798] ? get_signal+0x331/0x1d50 [ 61.297664] ? _raw_spin_unlock_irq+0x28/0x90 [ 61.302146] do_group_exit+0x135/0x370 [ 61.306019] get_signal+0x399/0x1d50 [ 61.309718] ? debug_object_deactivate+0x360/0x360 [ 61.314630] ? kfree+0x173/0x230 [ 61.317984] ? __call_rcu.constprop.0+0x2a3/0x6c0 [ 61.322813] do_signal+0x87/0x1940 [ 61.326336] ? task_work_run+0x118/0x1c0 [ 61.330381] ? kasan_check_read+0x11/0x20 [ 61.334511] ? setup_sigcontext+0x7d0/0x7d0 [ 61.338816] ? _raw_spin_unlock_irq+0x28/0x90 [ 61.343294] ? kasan_check_read+0x11/0x20 [ 61.347423] ? exit_to_usermode_loop+0x43/0x2c0 [ 61.352075] ? do_syscall_64+0x52d/0x610 [ 61.356117] ? exit_to_usermode_loop+0x43/0x2c0 [ 61.360766] ? lockdep_hardirqs_on+0x415/0x5d0 [ 61.365334] ? trace_hardirqs_on+0x67/0x230 [ 61.369639] exit_to_usermode_loop+0x244/0x2c0 [ 61.374217] do_syscall_64+0x52d/0x610 [ 61.378090] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 61.383263] RIP: 0033:0x449739 [ 61.386446] Code: Bad RIP value. [ 61.389798] RSP: 002b:00007f07f40e9cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 61.397487] RAX: 0000000000000001 RBX: 00000000006dac68 RCX: 0000000000449739 [ 61.404745] RDX: 0000000000449739 RSI: 0000000000000081 RDI: 00000000006dac6c [ 61.411999] RBP: 00000000006dac60 R08: 0000000000000000 R09: 0000000000000000 [ 61.419255] R10: 0000000000000006 R11: 0000000000000246 R12: 00000000006dac6c [ 61.426510] R13: 00007ffdee4d64ef R14: 00007f07f40ea9c0 R15: 20c49ba5e353f7cf [ 61.434884] Kernel Offset: disabled [ 61.438546] Rebooting in 86400 seconds..