Warning: Permanently added '10.128.0.208' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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: [ 203.664498] ================================================================== [ 203.671892] BUG: KASAN: use-after-free in __lock_acquire+0x2cb4/0x3ff0 [ 203.678546] Read of size 8 at addr ffff8880a4476c68 by task loop3/13968 [ 203.685269] [ 203.686879] CPU: 1 PID: 13968 Comm: loop3 Not tainted 4.19.163-syzkaller #0 [ 203.693954] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 203.703289] Call Trace: [ 203.705866] dump_stack+0x1fc/0x2fe [ 203.709476] print_address_description.cold+0x54/0x219 [ 203.714744] kasan_report_error.cold+0x8a/0x1c7 [ 203.719403] ? __lock_acquire+0x2cb4/0x3ff0 [ 203.723702] __asan_report_load8_noabort+0x88/0x90 [ 203.728625] ? __lock_acquire+0x2cb4/0x3ff0 [ 203.732924] __lock_acquire+0x2cb4/0x3ff0 [ 203.737053] ? trace_hardirqs_off+0x64/0x200 [ 203.741452] ? __kasan_slab_free+0x186/0x1f0 [ 203.745850] ? kmem_cache_free+0x7f/0x260 [ 203.749974] ? mempool_free+0xe3/0x370 [ 203.753839] ? bio_free+0xee/0x140 [ 203.757355] ? mark_held_locks+0xf0/0xf0 [ 203.761393] ? blk_update_request+0x30f/0xaf0 [ 203.765864] ? blk_mq_end_request+0x4a/0x340 [ 203.770250] ? lo_complete_rq+0x201/0x2d0 [ 203.774387] ? blk_mq_complete_request+0x472/0x660 [ 203.779293] ? loop_queue_work+0x274/0x20c0 [ 203.783591] ? kthread_worker_fn+0x292/0x730 [ 203.787973] ? kthread+0x33f/0x460 [ 203.791493] ? ret_from_fork+0x24/0x30 [ 203.795377] ? debug_check_no_obj_freed+0x201/0x482 [ 203.800371] ? lock_downgrade+0x720/0x720 [ 203.804508] ? lock_acquire+0x170/0x3c0 [ 203.808469] lock_acquire+0x170/0x3c0 [ 203.812247] ? __wake_up_common_lock+0xb0/0x170 [ 203.816893] _raw_spin_lock_irqsave+0x8c/0xc0 [ 203.821365] ? __wake_up_common_lock+0xb0/0x170 [ 203.826015] __wake_up_common_lock+0xb0/0x170 [ 203.830503] ? __wake_up_common+0x650/0x650 [ 203.834835] ? _raw_spin_unlock_irqrestore+0xa3/0xe0 [ 203.839925] lbmIODone+0x44b/0xf40 [ 203.843442] ? lock_downgrade+0x720/0x720 [ 203.847578] ? lock_acquire+0x170/0x3c0 [ 203.851541] ? scale_cookie_change.isra.0+0x380/0x380 [ 203.856717] ? lbmFree+0x100/0x100 [ 203.860233] bio_endio+0x471/0x810 [ 203.863759] blk_update_request+0x30f/0xaf0 [ 203.868074] blk_mq_end_request+0x4a/0x340 [ 203.872295] lo_complete_rq+0x201/0x2d0 [ 203.876246] blk_mq_complete_request+0x472/0x660 [ 203.880988] loop_queue_work+0x274/0x20c0 [ 203.885118] ? finish_task_switch+0x118/0x780 [ 203.889588] ? switch_mm_irqs_off+0x2e5/0x1340 [ 203.894157] ? lo_fallocate.isra.0+0x170/0x170 [ 203.898720] ? kthread_worker_fn+0x217/0x730 [ 203.903105] ? kthread_worker_fn+0x3e4/0x730 [ 203.907490] ? _raw_spin_unlock_irq+0x24/0x80 [ 203.911978] kthread_worker_fn+0x292/0x730 [ 203.916196] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 203.920776] ? __kthread_init_worker+0xf0/0xf0 [ 203.925334] ? __kthread_parkme+0x133/0x1e0 [ 203.929646] ? loop_info64_to_compat+0x5e0/0x5e0 [ 203.934380] kthread+0x33f/0x460 [ 203.937738] ? kthread_park+0x180/0x180 [ 203.941690] ret_from_fork+0x24/0x30 [ 203.945386] [ 203.946992] Allocated by task 13961: [ 203.950682] kmem_cache_alloc_trace+0x12f/0x380 [ 203.955329] lmLogInit+0x301/0x13d0 [ 203.958931] lmLogOpen+0x718/0x11e0 [ 203.962533] jfs_mount_rw+0x286/0x4b0 [ 203.966317] jfs_fill_super+0x814/0xb50 [ 203.970275] mount_bdev+0x2fc/0x3b0 [ 203.973876] mount_fs+0xa3/0x30c [ 203.977219] vfs_kern_mount.part.0+0x68/0x470 [ 203.981693] do_mount+0x113c/0x2f10 [ 203.985296] ksys_mount+0xcf/0x130 [ 203.988810] __x64_sys_mount+0xba/0x150 [ 203.992763] do_syscall_64+0xf9/0x620 [ 203.996555] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 204.001714] [ 204.003318] Freed by task 13961: [ 204.006660] kfree+0xcc/0x210 [ 204.009748] lmLogInit+0xf85/0x13d0 [ 204.013358] lmLogOpen+0x718/0x11e0 [ 204.016960] jfs_mount_rw+0x286/0x4b0 [ 204.020743] jfs_fill_super+0x814/0xb50 [ 204.024718] mount_bdev+0x2fc/0x3b0 [ 204.028319] mount_fs+0xa3/0x30c [ 204.031663] vfs_kern_mount.part.0+0x68/0x470 [ 204.036139] do_mount+0x113c/0x2f10 [ 204.039751] ksys_mount+0xcf/0x130 [ 204.043277] __x64_sys_mount+0xba/0x150 [ 204.047235] do_syscall_64+0xf9/0x620 [ 204.051019] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 204.056184] [ 204.057810] The buggy address belongs to the object at ffff8880a4476c00 [ 204.057810] which belongs to the cache kmalloc-192 of size 192 [ 204.070452] The buggy address is located 104 bytes inside of [ 204.070452] 192-byte region [ffff8880a4476c00, ffff8880a4476cc0) [ 204.082323] The buggy address belongs to the page: [ 204.087232] page:ffffea0002911d80 count:1 mapcount:0 mapping:ffff88813bff0040 index:0x0 [ 204.095348] flags: 0xfff00000000100(slab) [ 204.099474] raw: 00fff00000000100 ffffea0002843908 ffffea0002838a48 ffff88813bff0040 [ 204.107332] raw: 0000000000000000 ffff8880a4476000 0000000100000010 0000000000000000 [ 204.115199] page dumped because: kasan: bad access detected [ 204.120892] [ 204.122494] Memory state around the buggy address: [ 204.127398] ffff8880a4476b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 204.134730] ffff8880a4476b80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 204.142064] >ffff8880a4476c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 204.149400] ^ [ 204.156136] ffff8880a4476c80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 204.163483] ffff8880a4476d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 204.170814] ================================================================== [ 204.178145] Disabling lock debugging due to kernel taint [ 204.183568] Kernel panic - not syncing: panic_on_warn set ... [ 204.183568] [ 204.190920] CPU: 1 PID: 13968 Comm: loop3 Tainted: G B 4.19.163-syzkaller #0 [ 204.199380] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 204.208709] Call Trace: [ 204.211281] dump_stack+0x1fc/0x2fe [ 204.214893] panic+0x26a/0x50e [ 204.218086] ? __warn_printk+0xf3/0xf3 [ 204.221953] ? lock_downgrade+0x720/0x720 [ 204.226080] ? print_shadow_for_address+0xb8/0x114 [ 204.230999] ? trace_hardirqs_off+0x64/0x200 [ 204.235385] kasan_end_report+0x43/0x49 [ 204.239345] kasan_report_error.cold+0xa7/0x1c7 [ 204.244000] ? __lock_acquire+0x2cb4/0x3ff0 [ 204.248298] __asan_report_load8_noabort+0x88/0x90 [ 204.253206] ? __lock_acquire+0x2cb4/0x3ff0 [ 204.257504] __lock_acquire+0x2cb4/0x3ff0 [ 204.261632] ? trace_hardirqs_off+0x64/0x200 [ 204.266020] ? __kasan_slab_free+0x186/0x1f0 [ 204.270406] ? kmem_cache_free+0x7f/0x260 [ 204.274552] ? mempool_free+0xe3/0x370 [ 204.278419] ? bio_free+0xee/0x140 [ 204.281953] ? mark_held_locks+0xf0/0xf0 [ 204.285994] ? blk_update_request+0x30f/0xaf0 [ 204.290468] ? blk_mq_end_request+0x4a/0x340 [ 204.294869] ? lo_complete_rq+0x201/0x2d0 [ 204.299006] ? blk_mq_complete_request+0x472/0x660 [ 204.303913] ? loop_queue_work+0x274/0x20c0 [ 204.308217] ? kthread_worker_fn+0x292/0x730 [ 204.312615] ? kthread+0x33f/0x460 [ 204.316145] ? ret_from_fork+0x24/0x30 [ 204.320016] ? debug_check_no_obj_freed+0x201/0x482 [ 204.325020] ? lock_downgrade+0x720/0x720 [ 204.329147] ? lock_acquire+0x170/0x3c0 [ 204.333107] lock_acquire+0x170/0x3c0 [ 204.336891] ? __wake_up_common_lock+0xb0/0x170 [ 204.341547] _raw_spin_lock_irqsave+0x8c/0xc0 [ 204.346034] ? __wake_up_common_lock+0xb0/0x170 [ 204.350720] __wake_up_common_lock+0xb0/0x170 [ 204.355232] ? __wake_up_common+0x650/0x650 [ 204.359535] ? _raw_spin_unlock_irqrestore+0xa3/0xe0 [ 204.364642] lbmIODone+0x44b/0xf40 [ 204.368171] ? lock_downgrade+0x720/0x720 [ 204.372305] ? lock_acquire+0x170/0x3c0 [ 204.376273] ? scale_cookie_change.isra.0+0x380/0x380 [ 204.381439] ? lbmFree+0x100/0x100 [ 204.384958] bio_endio+0x471/0x810 [ 204.388478] blk_update_request+0x30f/0xaf0 [ 204.392781] blk_mq_end_request+0x4a/0x340 [ 204.396996] lo_complete_rq+0x201/0x2d0 [ 204.400950] blk_mq_complete_request+0x472/0x660 [ 204.405684] loop_queue_work+0x274/0x20c0 [ 204.409818] ? finish_task_switch+0x118/0x780 [ 204.414288] ? switch_mm_irqs_off+0x2e5/0x1340 [ 204.418848] ? lo_fallocate.isra.0+0x170/0x170 [ 204.423408] ? kthread_worker_fn+0x217/0x730 [ 204.427791] ? kthread_worker_fn+0x3e4/0x730 [ 204.432175] ? _raw_spin_unlock_irq+0x24/0x80 [ 204.436646] kthread_worker_fn+0x292/0x730 [ 204.440860] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 204.445418] ? __kthread_init_worker+0xf0/0xf0 [ 204.449977] ? __kthread_parkme+0x133/0x1e0 [ 204.454276] ? loop_info64_to_compat+0x5e0/0x5e0 [ 204.459017] kthread+0x33f/0x460 [ 204.462371] ? kthread_park+0x180/0x180 [ 204.466338] ret_from_fork+0x24/0x30 [ 204.470687] Kernel Offset: disabled [ 204.474300] Rebooting in 86400 seconds..