[info] Using makefile-style concurrent boot in runlevel 2. [ 57.475477][ T26] audit: type=1800 audit(1564722507.124:21): pid=9251 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [ 57.495925][ T26] audit: type=1800 audit(1564722507.124:22): pid=9251 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.113' (ECDSA) to the list of known hosts. syzkaller login: [ 100.285185][ T9412] IPVS: ftp: loaded support on port[0] = 21 [ 100.285189][ T9411] IPVS: ftp: loaded support on port[0] = 21 [ 100.294291][ T9414] IPVS: ftp: loaded support on port[0] = 21 [ 100.298865][ T9413] IPVS: ftp: loaded support on port[0] = 21 [ 100.305330][ T9410] IPVS: ftp: loaded support on port[0] = 21 [ 100.310469][ T9409] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 118.992035][ C0] ================================================================== [ 119.000177][ C0] BUG: KASAN: use-after-free in blkdev_bio_end_io+0x37e/0x430 [ 119.007633][ C0] Read of size 1 at addr ffff8880a40928d4 by task ksoftirqd/0/9 [ 119.015253][ C0] [ 119.017615][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.3.0-rc2+ #59 [ 119.024967][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 119.035176][ C0] Call Trace: [ 119.038451][ C0] dump_stack+0x1d8/0x2f8 [ 119.042853][ C0] print_address_description+0x75/0x5b0 [ 119.048470][ C0] ? log_buf_vmcoreinfo_setup+0x153/0x153 [ 119.054169][ C0] __kasan_report+0x14b/0x1c0 [ 119.058823][ C0] ? __lock_acquire+0x4710/0x4750 [ 119.063824][ C0] ? blkdev_bio_end_io+0x37e/0x430 [ 119.068912][ C0] kasan_report+0x26/0x50 [ 119.073237][ C0] __asan_report_load1_noabort+0x14/0x20 [ 119.078853][ C0] blkdev_bio_end_io+0x37e/0x430 [ 119.083875][ C0] ? bio_disassociate_blkg+0x192/0x230 [ 119.089311][ C0] ? bio_endio+0x440/0x570 [ 119.093890][ C0] ? blk_wake_io_task+0x90/0x90 [ 119.098716][ C0] bio_endio+0x4ff/0x570 [ 119.102947][ C0] blk_update_request+0x385/0xf80 [ 119.107951][ C0] blk_mq_end_request+0x42/0x80 [ 119.112813][ C0] end_cmd+0xeb/0x2d0 [ 119.116773][ C0] ? null_complete_rq+0xd/0x20 [ 119.121529][ C0] null_complete_rq+0x1c/0x20 [ 119.126188][ C0] blk_done_softirq+0x362/0x3e0 [ 119.131022][ C0] ? kvm_sched_clock_read+0x19/0x40 [ 119.136211][ C0] ? trigger_softirq+0x2a0/0x2a0 [ 119.141128][ C0] __do_softirq+0x333/0x7c4 [ 119.145615][ C0] ? run_ksoftirqd+0x64/0xf0 [ 119.150192][ C0] run_ksoftirqd+0x64/0xf0 [ 119.154594][ C0] ? ksoftirqd_should_run+0x20/0x20 [ 119.159794][ C0] smpboot_thread_fn+0x62c/0xa70 [ 119.164727][ C0] ? cpu_report_death+0x120/0x120 [ 119.169734][ C0] ? __kasan_check_read+0x11/0x20 [ 119.174735][ C0] ? __kthread_parkme+0x106/0x160 [ 119.179734][ C0] kthread+0x332/0x350 [ 119.183778][ C0] ? cpu_report_death+0x120/0x120 [ 119.188895][ C0] ? kthread_blkcg+0xe0/0xe0 [ 119.193561][ C0] ret_from_fork+0x24/0x30 [ 119.198040][ C0] [ 119.200359][ C0] Allocated by task 9743: [ 119.204671][ C0] __kasan_kmalloc+0x11c/0x1b0 [ 119.209441][ C0] kasan_slab_alloc+0xf/0x20 [ 119.214017][ C0] kmem_cache_alloc+0x1f5/0x2e0 [ 119.218838][ C0] mempool_alloc_slab+0x4d/0x70 [ 119.223675][ C0] mempool_alloc+0x15f/0x6c0 [ 119.228250][ C0] bio_alloc_bioset+0x210/0x670 [ 119.233083][ C0] __blkdev_direct_IO+0x29c/0x1310 [ 119.238163][ C0] blkdev_direct_IO+0xbe/0xd0 [ 119.242813][ C0] generic_file_read_iter+0x1ad3/0x21b0 [ 119.248373][ C0] blkdev_read_iter+0x12e/0x140 [ 119.253198][ C0] aio_read+0x362/0x4a0 [ 119.257339][ C0] io_submit_one+0x742/0x1ac0 [ 119.262002][ C0] __se_sys_io_submit+0x18f/0x2d0 [ 119.267023][ C0] __x64_sys_io_submit+0x7b/0x90 [ 119.271970][ C0] do_syscall_64+0xfe/0x140 [ 119.276455][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 119.282512][ C0] [ 119.284829][ C0] Freed by task 9: [ 119.288556][ C0] __kasan_slab_free+0x12a/0x1e0 [ 119.293469][ C0] kasan_slab_free+0xe/0x10 [ 119.297950][ C0] kmem_cache_free+0x81/0xf0 [ 119.302514][ C0] mempool_free_slab+0x1d/0x30 [ 119.307301][ C0] mempool_free+0xd5/0x350 [ 119.311695][ C0] bio_put+0x35a/0x420 [ 119.315738][ C0] bio_check_pages_dirty+0x404/0x4e0 [ 119.321007][ C0] blkdev_bio_end_io+0x345/0x430 [ 119.325927][ C0] bio_endio+0x4ff/0x570 [ 119.330158][ C0] blk_update_request+0x385/0xf80 [ 119.335160][ C0] blk_mq_end_request+0x42/0x80 [ 119.340002][ C0] end_cmd+0xeb/0x2d0 [ 119.343960][ C0] null_complete_rq+0x1c/0x20 [ 119.348618][ C0] blk_done_softirq+0x362/0x3e0 [ 119.353452][ C0] __do_softirq+0x333/0x7c4 [ 119.357950][ C0] [ 119.360254][ C0] The buggy address belongs to the object at ffff8880a40928c0 [ 119.360254][ C0] which belongs to the cache bio-1 of size 216 [ 119.373851][ C0] The buggy address is located 20 bytes inside of [ 119.373851][ C0] 216-byte region [ffff8880a40928c0, ffff8880a4092998) [ 119.387025][ C0] The buggy address belongs to the page: [ 119.392656][ C0] page:ffffea0002902480 refcount:1 mapcount:0 mapping:ffff8880a5ad0c40 index:0x0 [ 119.401913][ C0] flags: 0x1fffc0000000200(slab) [ 119.406853][ C0] raw: 01fffc0000000200 ffffea0002862888 ffffea000264a1c8 ffff8880a5ad0c40 [ 119.415430][ C0] raw: 0000000000000000 ffff8880a4092000 000000010000000c 0000000000000000 [ 119.424007][ C0] page dumped because: kasan: bad access detected [ 119.430409][ C0] [ 119.432717][ C0] Memory state around the buggy address: [ 119.438370][ C0] ffff8880a4092780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 119.446508][ C0] ffff8880a4092800: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 119.454604][ C0] >ffff8880a4092880: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 119.462850][ C0] ^ [ 119.469509][ C0] ffff8880a4092900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 119.477580][ C0] ffff8880a4092980: fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc [ 119.485633][ C0] ================================================================== [ 119.493710][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 119.500323][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Tainted: G B 5.3.0-rc2+ #59 [ 119.509074][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 119.521271][ C0] Call Trace: [ 119.524552][ C0] dump_stack+0x1d8/0x2f8 [ 119.529043][ C0] panic+0x29b/0x7d9 [ 119.532917][ C0] ? check_preemption_disabled+0x3a/0x2a0 [ 119.538618][ C0] ? __kasan_report+0x195/0x1c0 [ 119.543449][ C0] ? trace_hardirqs_on+0x34/0x80 [ 119.548361][ C0] ? nmi_panic+0x97/0x97 [ 119.552586][ C0] ? trace_hardirqs_on+0x34/0x80 [ 119.557594][ C0] ? __kasan_report+0x195/0x1c0 [ 119.562418][ C0] ? _raw_spin_unlock_irqrestore+0xad/0xe0 [ 119.568335][ C0] __kasan_report+0x1bb/0x1c0 [ 119.572994][ C0] ? __lock_acquire+0x4710/0x4750 [ 119.577996][ C0] ? blkdev_bio_end_io+0x37e/0x430 [ 119.583088][ C0] kasan_report+0x26/0x50 [ 119.587412][ C0] __asan_report_load1_noabort+0x14/0x20 [ 119.593116][ C0] blkdev_bio_end_io+0x37e/0x430 [ 119.598060][ C0] ? bio_disassociate_blkg+0x192/0x230 [ 119.603518][ C0] ? bio_endio+0x440/0x570 [ 119.608013][ C0] ? blk_wake_io_task+0x90/0x90 [ 119.612844][ C0] bio_endio+0x4ff/0x570 [ 119.617674][ C0] blk_update_request+0x385/0xf80 [ 119.622700][ C0] blk_mq_end_request+0x42/0x80 [ 119.627541][ C0] end_cmd+0xeb/0x2d0 [ 119.631501][ C0] ? null_complete_rq+0xd/0x20 [ 119.636373][ C0] null_complete_rq+0x1c/0x20 [ 119.641032][ C0] blk_done_softirq+0x362/0x3e0 [ 119.645867][ C0] ? kvm_sched_clock_read+0x19/0x40 [ 119.651048][ C0] ? trigger_softirq+0x2a0/0x2a0 [ 119.655978][ C0] __do_softirq+0x333/0x7c4 [ 119.660548][ C0] ? run_ksoftirqd+0x64/0xf0 [ 119.665612][ C0] run_ksoftirqd+0x64/0xf0 [ 119.670023][ C0] ? ksoftirqd_should_run+0x20/0x20 [ 119.675229][ C0] smpboot_thread_fn+0x62c/0xa70 [ 119.682169][ C0] ? cpu_report_death+0x120/0x120 [ 119.687196][ C0] ? __kasan_check_read+0x11/0x20 [ 119.692203][ C0] ? __kthread_parkme+0x106/0x160 [ 119.697207][ C0] kthread+0x332/0x350 [ 119.701360][ C0] ? cpu_report_death+0x120/0x120 [ 119.706540][ C0] ? kthread_blkcg+0xe0/0xe0 [ 119.711131][ C0] ret_from_fork+0x24/0x30 [ 119.716876][ C0] Kernel Offset: disabled [ 119.721200][ C0] Rebooting in 86400 seconds..