Warning: Permanently added '10.128.0.49' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 91.218866][ C0] ================================================================== [ 91.226982][ C0] BUG: KASAN: use-after-free in blkdev_bio_end_io+0x3e3/0x4b0 [ 91.234444][ C0] Read of size 1 at addr ffff88808ed71ad4 by task ksoftirqd/0/9 [ 91.242055][ C0] [ 91.244390][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.3.0-rc2+ #112 [ 91.251836][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 91.261881][ C0] Call Trace: [ 91.265178][ C0] dump_stack+0x172/0x1f0 [ 91.269510][ C0] ? blkdev_bio_end_io+0x3e3/0x4b0 [ 91.274629][ C0] print_address_description.cold+0xd4/0x306 [ 91.280610][ C0] ? blkdev_bio_end_io+0x3e3/0x4b0 [ 91.285722][ C0] ? blkdev_bio_end_io+0x3e3/0x4b0 [ 91.290835][ C0] __kasan_report.cold+0x1b/0x36 [ 91.295780][ C0] ? blkdev_bio_end_io+0x3e3/0x4b0 [ 91.300903][ C0] kasan_report+0x12/0x17 [ 91.305242][ C0] __asan_report_load1_noabort+0x14/0x20 [ 91.310881][ C0] blkdev_bio_end_io+0x3e3/0x4b0 executing program executing program [ 91.315823][ C0] ? check_disk_change+0x140/0x140 [ 91.321617][ C0] bio_endio+0x611/0xaf0 [ 91.325855][ C0] blk_update_request+0x32e/0xc10 [ 91.330886][ C0] blk_mq_end_request+0x5b/0x560 [ 91.335832][ C0] end_cmd+0x111/0x310 [ 91.339908][ C0] null_complete_rq+0x19/0x20 [ 91.344592][ C0] blk_done_softirq+0x2fe/0x4d0 [ 91.349453][ C0] ? cyc2ns_read_begin+0x141/0x170 [ 91.354576][ C0] ? blk_rq_map_sg.cold+0x1f/0x1f [ 91.359636][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.365883][ C0] __do_softirq+0x262/0x98c [ 91.370397][ C0] ? takeover_tasklets+0x820/0x820 [ 91.375511][ C0] run_ksoftirqd+0x8e/0x110 [ 91.380048][ C0] smpboot_thread_fn+0x6a3/0xa40 [ 91.384993][ C0] ? smpboot_register_percpu_thread+0x390/0x390 [ 91.391238][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 91.397485][ C0] ? __kthread_parkme+0x108/0x1c0 [ 91.402511][ C0] ? __kasan_check_read+0x11/0x20 [ 91.407575][ C0] kthread+0x361/0x430 [ 91.411646][ C0] ? smpboot_register_percpu_thread+0x390/0x390 [ 91.417889][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 91.424137][ C0] ret_from_fork+0x24/0x30 [ 91.428563][ C0] [ 91.430893][ C0] Allocated by task 10487: [ 91.435311][ C0] save_stack+0x23/0x90 [ 91.439477][ C0] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 91.445106][ C0] kasan_slab_alloc+0xf/0x20 [ 91.449696][ C0] kmem_cache_alloc+0x121/0x710 [ 91.454551][ C0] mempool_alloc_slab+0x47/0x60 [ 91.459396][ C0] mempool_alloc+0x169/0x380 [ 91.463997][ C0] bio_alloc_bioset+0x3b9/0x680 [ 91.468844][ C0] blkdev_direct_IO+0x39c/0x1590 [ 91.473811][ C0] generic_file_read_iter+0x283/0x1ce0 [ 91.479361][ C0] blkdev_read_iter+0x120/0x190 [ 91.484211][ C0] aio_read+0x252/0x3b0 [ 91.488362][ C0] io_submit_one+0x1054/0x2ef0 [ 91.493166][ C0] __x64_sys_io_submit+0x1bd/0x570 [ 91.498278][ C0] do_syscall_64+0xfd/0x6a0 [ 91.502794][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 91.508679][ C0] [ 91.511002][ C0] Freed by task 9: [ 91.514725][ C0] save_stack+0x23/0x90 [ 91.518879][ C0] __kasan_slab_free+0x102/0x150 [ 91.523806][ C0] kasan_slab_free+0xe/0x10 [ 91.528289][ C0] kmem_cache_free+0x86/0x320 [ 91.532942][ C0] mempool_free_slab+0x1e/0x30 [ 91.537679][ C0] mempool_free+0xeb/0x370 [ 91.542078][ C0] bio_free+0x267/0x420 [ 91.546211][ C0] bio_put+0xda/0x110 [ 91.550168][ C0] bio_check_pages_dirty+0x3de/0x560 [ 91.555444][ C0] blkdev_bio_end_io+0x30d/0x4b0 [ 91.560359][ C0] bio_endio+0x611/0xaf0 [ 91.564619][ C0] blk_update_request+0x32e/0xc10 [ 91.569637][ C0] blk_mq_end_request+0x5b/0x560 [ 91.574556][ C0] end_cmd+0x111/0x310 [ 91.578615][ C0] null_complete_rq+0x19/0x20 [ 91.583283][ C0] blk_done_softirq+0x2fe/0x4d0 [ 91.588111][ C0] __do_softirq+0x262/0x98c [ 91.592606][ C0] [ 91.594937][ C0] The buggy address belongs to the object at ffff88808ed71ac0 [ 91.594937][ C0] which belongs to the cache bio-1 of size 216 [ 91.608443][ C0] The buggy address is located 20 bytes inside of [ 91.608443][ C0] 216-byte region [ffff88808ed71ac0, ffff88808ed71b98) [ 91.621626][ C0] The buggy address belongs to the page: [ 91.627237][ C0] page:ffffea00023b5c40 refcount:1 mapcount:0 mapping:ffff888219eb6540 index:0x0 [ 91.636329][ C0] flags: 0x1fffc0000000200(slab) [ 91.641251][ C0] raw: 01fffc0000000200 ffffea0002a38e48 ffff8880a5e06048 ffff888219eb6540 [ 91.649815][ C0] raw: 0000000000000000 ffff88808ed710c0 000000010000000c 0000000000000000 [ 91.658368][ C0] page dumped because: kasan: bad access detected [ 91.664754][ C0] [ 91.667058][ C0] Memory state around the buggy address: [ 91.672678][ C0] ffff88808ed71980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 91.680724][ C0] ffff88808ed71a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 91.688768][ C0] >ffff88808ed71a80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 91.696799][ C0] ^ [ 91.703449][ C0] ffff88808ed71b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 91.711576][ C0] ffff88808ed71b80: fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc [ 91.719638][ C0] ================================================================== [ 91.727746][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 91.734343][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Tainted: G B 5.3.0-rc2+ #112 [ 91.743175][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 91.753206][ C0] Call Trace: [ 91.756479][ C0] dump_stack+0x172/0x1f0 [ 91.760793][ C0] panic+0x2dc/0x755 [ 91.764669][ C0] ? add_taint.cold+0x16/0x16 [ 91.769332][ C0] ? trace_hardirqs_on+0x5e/0x240 [ 91.774331][ C0] ? trace_hardirqs_on+0x5e/0x240 [ 91.779341][ C0] ? blkdev_bio_end_io+0x3e3/0x4b0 [ 91.784430][ C0] end_report+0x47/0x4f [ 91.788561][ C0] ? blkdev_bio_end_io+0x3e3/0x4b0 [ 91.793657][ C0] __kasan_report.cold+0xe/0x36 [ 91.798500][ C0] ? blkdev_bio_end_io+0x3e3/0x4b0 [ 91.803595][ C0] kasan_report+0x12/0x17 [ 91.807915][ C0] __asan_report_load1_noabort+0x14/0x20 [ 91.813520][ C0] blkdev_bio_end_io+0x3e3/0x4b0 [ 91.818441][ C0] ? check_disk_change+0x140/0x140 [ 91.823540][ C0] bio_endio+0x611/0xaf0 [ 91.827780][ C0] blk_update_request+0x32e/0xc10 [ 91.832803][ C0] blk_mq_end_request+0x5b/0x560 [ 91.837725][ C0] end_cmd+0x111/0x310 [ 91.841775][ C0] null_complete_rq+0x19/0x20 [ 91.846431][ C0] blk_done_softirq+0x2fe/0x4d0 [ 91.851259][ C0] ? cyc2ns_read_begin+0x141/0x170 [ 91.856352][ C0] ? blk_rq_map_sg.cold+0x1f/0x1f [ 91.861363][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.867617][ C0] __do_softirq+0x262/0x98c [ 91.872105][ C0] ? takeover_tasklets+0x820/0x820 [ 91.877209][ C0] run_ksoftirqd+0x8e/0x110 [ 91.881704][ C0] smpboot_thread_fn+0x6a3/0xa40 [ 91.886620][ C0] ? smpboot_register_percpu_thread+0x390/0x390 [ 91.892926][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 91.899146][ C0] ? __kthread_parkme+0x108/0x1c0 [ 91.904161][ C0] ? __kasan_check_read+0x11/0x20 [ 91.909169][ C0] kthread+0x361/0x430 [ 91.913232][ C0] ? smpboot_register_percpu_thread+0x390/0x390 [ 91.919454][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 91.925678][ C0] ret_from_fork+0x24/0x30 [ 91.931056][ C0] Kernel Offset: disabled [ 91.935394][ C0] Rebooting in 86400 seconds..