Warning: Permanently added '10.128.1.38' (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 syzkaller login: [ 63.581649] ================================================================== [ 63.582974] BUG: KASAN: use-after-free in disk_unblock_events+0x51/0x60 [ 63.584251] Read of size 8 at addr ffff8801cde92760 by task blkid/2097 [ 63.585507] [ 63.585778] CPU: 0 PID: 2097 Comm: blkid Not tainted 4.9.141+ #23 [ 63.586838] ffff8801cea2f6f8 ffffffff81b42e79 ffffea000737a400 ffff8801cde92760 [ 63.588325] 0000000000000000 ffff8801cde92760 0000000000000000 ffff8801cea2f730 [ 63.589856] ffffffff815009b8 ffff8801cde92760 0000000000000008 0000000000000000 [ 63.591500] Call Trace: [ 63.592033] [] dump_stack+0xc1/0x128 [ 63.593534] [] print_address_description+0x6c/0x234 [ 63.594591] [] kasan_report.cold.6+0x242/0x2fe [ 63.595647] [] ? disk_unblock_events+0x51/0x60 [ 63.596527] [] __asan_report_load8_noabort+0x14/0x20 [ 63.597791] [] disk_unblock_events+0x51/0x60 [ 63.598957] [] __blkdev_get+0x6b6/0xd60 [ 63.599846] [] ? __blkdev_put+0x840/0x840 [ 63.600782] [] ? fsnotify+0x114/0x1100 [ 63.601653] [] blkdev_get+0x2da/0x920 [ 63.606512] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 63.613305] [] ? bd_may_claim+0xd0/0xd0 [ 63.618919] [] ? bd_acquire+0x27/0x250 [ 63.624581] [] ? bd_acquire+0x88/0x250 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 63.630185] [] ? _raw_spin_unlock+0x2c/0x50 [ 63.636153] [] blkdev_open+0x1a5/0x250 [ 63.641673] [] do_dentry_open+0x3ef/0xc90 [ 63.647537] [] ? blkdev_get_by_dev+0x70/0x70 [ 63.653584] [] vfs_open+0x11c/0x210 [ 63.658931] [] ? may_open.isra.20+0x14f/0x2a0 [ 63.665255] [] path_openat+0x542/0x2790 [ 63.670863] [] ? path_mountpoint+0x6c0/0x6c0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 63.676904] [] ? trace_hardirqs_on+0x10/0x10 [ 63.682944] [] ? expand_files.part.3+0x3a9/0x6d0 [ 63.689437] [] do_filp_open+0x197/0x270 [ 63.695045] [] ? may_open_dev+0xe0/0xe0 [ 63.700659] [] ? _raw_spin_unlock+0x2c/0x50 [ 63.706615] [] ? __alloc_fd+0x1d7/0x4a0 [ 63.712445] [] do_sys_open+0x30d/0x5c0 [ 63.717968] [] ? filp_open+0x70/0x70 [ 63.723316] [] ? up_read+0x1a/0x40 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 63.728588] [] SyS_open+0x2d/0x40 [ 63.733778] [] ? do_sys_open+0x5c0/0x5c0 [ 63.739482] [] do_syscall_64+0x19f/0x550 [ 63.745215] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 63.752162] [ 63.753849] Allocated by task 2089: [ 63.757471] save_stack_trace+0x16/0x20 [ 63.761431] kasan_kmalloc.part.1+0x62/0xf0 [ 63.765737] kasan_kmalloc+0xaf/0xc0 [ 63.769497] kmem_cache_alloc_trace+0x117/0x2e0 [ 63.774199] alloc_disk_node+0x54/0x3a0 [ 63.778335] alloc_disk+0x18/0x20 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 63.781834] loop_add+0x368/0x7a0 [ 63.785271] loop_control_ioctl+0x136/0x300 [ 63.789668] compat_SyS_ioctl+0x12d/0x1fd0 [ 63.793883] do_fast_syscall_32+0x2f1/0xa10 [ 63.798197] entry_SYSENTER_compat+0x90/0xa2 [ 63.803459] [ 63.805066] Freed by task 2097: [ 63.808378] save_stack_trace+0x16/0x20 [ 63.812344] kasan_slab_free+0xac/0x190 [ 63.816294] kfree+0xfb/0x310 [ 63.819376] disk_release+0x259/0x330 [ 63.823195] device_release+0x7e/0x220 [ 63.827069] kobject_put+0x148/0x250 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 63.830769] put_disk+0x23/0x30 [ 63.834029] __blkdev_get+0x616/0xd60 [ 63.837864] blkdev_get+0x2da/0x920 [ 63.841474] blkdev_open+0x1a5/0x250 [ 63.845165] do_dentry_open+0x3ef/0xc90 [ 63.849161] vfs_open+0x11c/0x210 [ 63.852599] path_openat+0x542/0x2790 [ 63.856381] do_filp_open+0x197/0x270 [ 63.860195] do_sys_open+0x30d/0x5c0 [ 63.863882] SyS_open+0x2d/0x40 [ 63.867142] do_syscall_64+0x19f/0x550 [ 63.871110] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 63.876275] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 63.877993] The buggy address belongs to the object at ffff8801cde92200 [ 63.877993] which belongs to the cache kmalloc-2048 of size 2048 [ 63.890808] The buggy address is located 1376 bytes inside of [ 63.890808] 2048-byte region [ffff8801cde92200, ffff8801cde92a00) [ 63.902998] The buggy address belongs to the page: [ 63.907914] page:ffffea000737a400 count:1 mapcount:0 mapping: (null) index:0x0 compound_mapcount: 0 [ 63.918745] flags: 0x4000000000004080(slab|head) [ 63.923544] page dumped because: kasan: bad access detected [ 63.929323] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 63.930929] Memory state around the buggy address: [ 63.935836] ffff8801cde92600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.943256] ffff8801cde92680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.950701] >ffff8801cde92700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.958088] ^ [ 63.964684] ffff8801cde92780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.972079] ffff8801cde92800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 63.979428] ================================================================== [ 63.986849] Disabling lock debugging due to kernel taint [ 63.995378] Kernel panic - not syncing: panic_on_warn set ... [ 63.995378] [ 64.002776] CPU: 0 PID: 2097 Comm: blkid Tainted: G B 4.9.141+ #23 [ 64.010207] ffff8801cea2f658 ffffffff81b42e79 ffffffff82e37630 00000000ffffffff [ 64.018253] 0000000000000000 0000000000000000 0000000000000000 ffff8801cea2f718 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 64.026410] ffffffff813f7125 0000000041b58ab3 ffffffff82e2b62b ffffffff813f6f66 [ 64.034616] Call Trace: [ 64.037198] [] dump_stack+0xc1/0x128 [ 64.042542] [] panic+0x1bf/0x39f [ 64.047546] [] ? add_taint.cold.5+0x16/0x16 [ 64.053503] [] ? ___preempt_schedule+0x16/0x18 [ 64.059788] [] kasan_end_report+0x47/0x4f [ 64.065643] [] kasan_report.cold.6+0x76/0x2fe [ 64.071780] [] ? disk_unblock_events+0x51/0x60 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 64.078103] [] __asan_report_load8_noabort+0x14/0x20 [ 64.085006] [] disk_unblock_events+0x51/0x60 [ 64.091051] [] __blkdev_get+0x6b6/0xd60 [ 64.096658] [] ? __blkdev_put+0x840/0x840 [ 64.102437] [] ? fsnotify+0x114/0x1100 [ 64.108029] [] blkdev_get+0x2da/0x920 [ 64.113470] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 64.120199] [] ? bd_may_claim+0xd0/0xd0 [ 64.125801] [] ? bd_acquire+0x27/0x250 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 64.131438] [] ? bd_acquire+0x88/0x250 [ 64.137022] [] ? _raw_spin_unlock+0x2c/0x50 [ 64.142979] [] blkdev_open+0x1a5/0x250 [ 64.148502] [] do_dentry_open+0x3ef/0xc90 [ 64.154342] [] ? blkdev_get_by_dev+0x70/0x70 [ 64.160403] [] vfs_open+0x11c/0x210 [ 64.165711] [] ? may_open.isra.20+0x14f/0x2a0 [ 64.171842] [] path_openat+0x542/0x2790 [ 64.177449] [] ? path_mountpoint+0x6c0/0x6c0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 64.183651] [] ? trace_hardirqs_on+0x10/0x10 [ 64.194331] [] ? expand_files.part.3+0x3a9/0x6d0 [ 64.200763] [] do_filp_open+0x197/0x270 [ 64.206488] [] ? may_open_dev+0xe0/0xe0 [ 64.212112] [] ? _raw_spin_unlock+0x2c/0x50 [ 64.218084] [] ? __alloc_fd+0x1d7/0x4a0 [ 64.223710] [] do_sys_open+0x30d/0x5c0 [ 64.229248] [] ? filp_open+0x70/0x70 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 64.234612] [] ? up_read+0x1a/0x40 [ 64.239814] [] SyS_open+0x2d/0x40 [ 64.244930] [] ? do_sys_open+0x5c0/0x5c0 [ 64.250654] [] do_syscall_64+0x19f/0x550 [ 64.256899] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 64.264112] Kernel Offset: disabled [ 64.267942] Rebooting in 86400 seconds..