[ 38.343815][ T26] audit: type=1800 audit(1551578675.752:27): pid=7657 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 38.374039][ T26] audit: type=1800 audit(1551578675.752:28): pid=7657 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. [ 39.062227][ T26] audit: type=1800 audit(1551578676.522:29): pid=7657 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 [ 39.082600][ T26] audit: type=1800 audit(1551578676.522:30): pid=7657 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 '10.128.0.103' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 46.419331][ T7813] ------------[ cut here ]------------ [ 46.424919][ T7813] generic_make_request: Trying to write to read-only block-device loop0 (partno 0) [ 46.434480][ T7813] WARNING: CPU: 0 PID: 7813 at block/blk-core.c:801 generic_make_request_checks+0x1ca3/0x2160 [ 46.444696][ T7813] Kernel panic - not syncing: panic_on_warn set ... [ 46.451871][ T7813] CPU: 0 PID: 7813 Comm: syz-executor671 Not tainted 5.0.0-rc8-next-20190301 #1 [ 46.460874][ T7813] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.470901][ T7813] Call Trace: [ 46.474167][ T7813] dump_stack+0x172/0x1f0 [ 46.478491][ T7813] ? generic_make_request_checks+0x1c80/0x2160 [ 46.484628][ T7813] panic+0x2cb/0x65c [ 46.488501][ T7813] ? __warn_printk+0xf3/0xf3 [ 46.493096][ T7813] ? generic_make_request_checks+0x1ca3/0x2160 [ 46.499245][ T7813] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.505460][ T7813] ? __warn.cold+0x5/0x45 [ 46.509759][ T7813] ? __warn+0xe8/0x1d0 [ 46.513820][ T7813] ? generic_make_request_checks+0x1ca3/0x2160 [ 46.519961][ T7813] __warn.cold+0x20/0x45 [ 46.524182][ T7813] ? vprintk_emit+0x1ce/0x6d0 [ 46.528838][ T7813] ? generic_make_request_checks+0x1ca3/0x2160 [ 46.534975][ T7813] report_bug+0x263/0x2b0 [ 46.539287][ T7813] do_error_trap+0x11b/0x200 [ 46.543873][ T7813] do_invalid_op+0x37/0x50 [ 46.548276][ T7813] ? generic_make_request_checks+0x1ca3/0x2160 [ 46.554414][ T7813] invalid_op+0x14/0x20 [ 46.558570][ T7813] RIP: 0010:generic_make_request_checks+0x1ca3/0x2160 [ 46.565321][ T7813] Code: 00 00 44 8b ab b4 04 00 00 48 8d b5 78 ff ff ff 4c 89 ff e8 ef 80 05 00 48 c7 c7 60 41 a0 87 48 89 c6 44 89 ea e8 3b a3 25 fe <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 [ 46.584903][ T7813] RSP: 0018:ffff888082da6f80 EFLAGS: 00010286 [ 46.590945][ T7813] RAX: 0000000000000000 RBX: ffff8880a3cf68c0 RCX: 0000000000000000 [ 46.598913][ T7813] RDX: 0000000000000000 RSI: ffffffff815b2e66 RDI: ffffed10105b4de2 [ 46.606869][ T7813] RBP: ffff888082da7080 R08: ffff888096e7c640 R09: ffff888096e7cee0 [ 46.614831][ T7813] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880955cde48 [ 46.622790][ T7813] R13: 0000000000000000 R14: 0000000000000001 R15: ffff8880955cde40 [ 46.630755][ T7813] ? vprintk_func+0x86/0x189 [ 46.635334][ T7813] ? trace_event_raw_event_block_rq_requeue+0x640/0x640 [ 46.642264][ T7813] generic_make_request+0x24c/0x12d0 [ 46.647527][ T7813] ? find_held_lock+0x35/0x130 [ 46.652282][ T7813] ? bio_associate_blkg_from_css+0x4e5/0x990 [ 46.658238][ T7813] ? blk_queue_enter+0xe90/0xe90 [ 46.663163][ T7813] ? lock_downgrade+0x880/0x880 [ 46.667993][ T7813] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.674226][ T7813] submit_bio+0xba/0x480 [ 46.678455][ T7813] ? submit_bio+0xba/0x480 [ 46.682863][ T7813] ? generic_make_request+0x12d0/0x12d0 [ 46.688400][ T7813] ? bio_reset+0x3b0/0x3b0 [ 46.692806][ T7813] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 46.698504][ T7813] ? guard_bio_eod+0x295/0x6e0 [ 46.703243][ T7813] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 46.708937][ T7813] ? wbc_account_io+0x17e/0x2a0 [ 46.713767][ T7813] submit_bh_wbc+0x5f7/0x7f0 [ 46.718337][ T7813] __block_write_full_page+0x771/0x1020 [ 46.723879][ T7813] ? check_disk_change+0x140/0x140 [ 46.728983][ T7813] block_write_full_page+0x21f/0x270 [ 46.734280][ T7813] ? check_disk_change+0x140/0x140 [ 46.739372][ T7813] blkdev_writepage+0x25/0x30 [ 46.744026][ T7813] __writepage+0x67/0xe0 [ 46.748248][ T7813] write_cache_pages+0x8af/0x1560 [ 46.753253][ T7813] ? __wb_update_bandwidth+0x670/0x670 [ 46.758708][ T7813] ? clear_page_dirty_for_io+0xff0/0xff0 [ 46.764324][ T7813] ? __lock_acquire+0x548/0x3fb0 [ 46.769242][ T7813] ? ___bpf_prog_run+0x1291/0x6780 [ 46.774338][ T7813] generic_writepages+0xed/0x160 [ 46.779256][ T7813] ? write_cache_pages+0x1560/0x1560 [ 46.784532][ T7813] ? __lock_acquire+0x548/0x3fb0 [ 46.789469][ T7813] ? mark_held_locks+0xf0/0xf0 [ 46.794225][ T7813] ? wbc_attach_and_unlock_inode+0x51a/0x930 [ 46.800223][ T7813] ? find_held_lock+0x35/0x130 [ 46.804980][ T7813] ? blkdev_readpages+0x40/0x40 [ 46.809806][ T7813] blkdev_writepages+0x1e/0x30 [ 46.814555][ T7813] do_writepages+0xfc/0x2a0 [ 46.819038][ T7813] ? page_writeback_cpu_online+0x20/0x20 [ 46.824646][ T7813] ? kasan_check_read+0x11/0x20 [ 46.829473][ T7813] ? do_raw_spin_unlock+0x57/0x270 [ 46.834561][ T7813] ? _raw_spin_unlock+0x2d/0x50 [ 46.839387][ T7813] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.845608][ T7813] ? wbc_attach_and_unlock_inode+0x5c4/0x930 [ 46.851574][ T7813] __filemap_fdatawrite_range+0x26d/0x340 [ 46.857272][ T7813] ? delete_from_page_cache_batch+0x10e0/0x10e0 [ 46.863499][ T7813] filemap_write_and_wait+0x47/0xd0 [ 46.868676][ T7813] __blkdev_put+0x204/0x810 [ 46.873157][ T7813] ? bd_set_size+0xb0/0xb0 [ 46.877550][ T7813] ? wait_for_completion+0x440/0x440 [ 46.882813][ T7813] ? kasan_check_read+0x11/0x20 [ 46.887662][ T7813] blkdev_put+0x98/0x560 [ 46.891895][ T7813] ? blkdev_put+0x560/0x560 [ 46.896383][ T7813] blkdev_close+0x8b/0xb0 [ 46.900691][ T7813] __fput+0x2e5/0x8d0 [ 46.904651][ T7813] ____fput+0x16/0x20 [ 46.908633][ T7813] task_work_run+0x14a/0x1c0 [ 46.913220][ T7813] do_exit+0x90a/0x2fa0 [ 46.917381][ T7813] ? get_signal+0x331/0x1d50 [ 46.921959][ T7813] ? mm_update_next_owner+0x640/0x640 [ 46.927312][ T7813] ? kasan_check_write+0x14/0x20 [ 46.932245][ T7813] ? _raw_spin_unlock_irq+0x28/0x90 [ 46.937434][ T7813] ? get_signal+0x331/0x1d50 [ 46.942012][ T7813] ? _raw_spin_unlock_irq+0x28/0x90 [ 46.947214][ T7813] do_group_exit+0x135/0x370 [ 46.951783][ T7813] get_signal+0x399/0x1d50 [ 46.956179][ T7813] ? kasan_check_read+0x11/0x20 [ 46.961008][ T7813] ? __fget+0x381/0x550 [ 46.965142][ T7813] do_signal+0x87/0x1940 [ 46.969362][ T7813] ? ksys_dup3+0x3e0/0x3e0 [ 46.973754][ T7813] ? setup_sigcontext+0x7d0/0x7d0 [ 46.978775][ T7813] ? exit_to_usermode_loop+0x43/0x2c0 [ 46.984130][ T7813] ? do_syscall_64+0x52d/0x610 [ 46.988875][ T7813] ? exit_to_usermode_loop+0x43/0x2c0 [ 46.994224][ T7813] ? lockdep_hardirqs_on+0x418/0x5d0 [ 46.999500][ T7813] ? trace_hardirqs_on+0x67/0x230 [ 47.004506][ T7813] exit_to_usermode_loop+0x244/0x2c0 [ 47.009770][ T7813] do_syscall_64+0x52d/0x610 [ 47.014338][ T7813] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.020206][ T7813] RIP: 0033:0x449739 [ 47.024083][ T7813] Code: Bad RIP value. [ 47.028126][ T7813] RSP: 002b:00007f6a164e9cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 47.036509][ T7813] RAX: fffffffffffffe00 RBX: 00000000006dac68 RCX: 0000000000449739 [ 47.044455][ T7813] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dac68 [ 47.052401][ T7813] RBP: 00000000006dac60 R08: 0000000000000000 R09: 0000000000000000 [ 47.060346][ T7813] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac6c [ 47.068293][ T7813] R13: 00007fff2c18a61f R14: 00007f6a164ea9c0 R15: 20c49ba5e353f7cf [ 47.077381][ T7813] Kernel Offset: disabled [ 47.081748][ T7813] Rebooting in 86400 seconds..