Warning: Permanently added '10.128.0.173' (ECDSA) to the list of known hosts.
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syzkaller login: [   41.121735] ==================================================================
[   41.129147] BUG: KASAN: use-after-free in disk_unblock_events+0x55/0x60
[   41.135886] Read of size 8 at addr ffff8801d43c5a68 by task blkid/2155
[   41.142537] 
[   41.144159] CPU: 1 PID: 2155 Comm: blkid Not tainted 4.4.171+ #11
[   41.150376]  0000000000000000 aa093fb0f800c8a9 ffff8800b6647730 ffffffff81aaca21
[   41.158440]  0000000000000000 ffffea000750f000 ffff8801d43c5a68 0000000000000008
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[   41.166507]  0000000000000000 ffff8800b6647768 ffffffff8148fbed 0000000000000000
[   41.174578] Call Trace:
[   41.177163]  [<ffffffff81aaca21>] dump_stack+0xc1/0x120
[   41.182523]  [<ffffffff8148fbed>] print_address_description+0x6f/0x21b
[   41.189192]  [<ffffffff8148fe25>] kasan_report.cold+0x8c/0x2be
[   41.195171]  [<ffffffff81a821e5>] ? disk_unblock_events+0x55/0x60
[   41.201419]  [<ffffffff814849d4>] __asan_report_load8_noabort+0x14/0x20
[   41.208169]  [<ffffffff81a821e5>] disk_unblock_events+0x55/0x60
[   41.214243]  [<ffffffff8154e91c>] __blkdev_get+0x70c/0xdf0
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[   41.219865]  [<ffffffff8154e210>] ? __blkdev_put+0x840/0x840
[   41.225659]  [<ffffffff811ff3a0>] ? trace_hardirqs_on+0x10/0x10
[   41.231775]  [<ffffffff81551288>] blkdev_get+0x2e8/0x920
[   41.237232]  [<ffffffff81550fa0>] ? bd_may_claim+0xd0/0xd0
[   41.242853]  [<ffffffff815506ca>] ? bd_acquire+0x8a/0x370
[   41.248384]  [<ffffffff8271700d>] ? _raw_spin_unlock+0x2d/0x50
[   41.254349]  [<ffffffff81551aea>] blkdev_open+0x1aa/0x250
[   41.259880]  [<ffffffff8149101f>] do_dentry_open+0x38f/0xbd0
[   41.265675]  [<ffffffff814b66de>] ? __inode_permission2+0x9e/0x250
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[   41.271988]  [<ffffffff81551940>] ? blkdev_get_by_dev+0x80/0x80
[   41.278373]  [<ffffffff8149480b>] vfs_open+0x10b/0x210
[   41.283647]  [<ffffffff814c4297>] ? may_open.isra.0+0xe7/0x210
[   41.289617]  [<ffffffff814c572f>] path_openat+0x136f/0x4470
[   41.295328]  [<ffffffff81483a86>] ? kasan_kmalloc.part.0+0xc6/0xf0
[   41.301643]  [<ffffffff814c43c0>] ? may_open.isra.0+0x210/0x210
[   41.307698]  [<ffffffff811ff3a0>] ? trace_hardirqs_on+0x10/0x10
[   41.313750]  [<ffffffff814cc401>] do_filp_open+0x1a1/0x270
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[   41.319369]  [<ffffffff814c9dbc>] ? getname_flags+0xcc/0x550
[   41.325163]  [<ffffffff814cc260>] ? user_path_mountpoint_at+0x50/0x50
[   41.331744]  [<ffffffff814f2c3a>] ? __alloc_fd+0x1ea/0x490
[   41.337366]  [<ffffffff8271700d>] ? _raw_spin_unlock+0x2d/0x50
[   41.343329]  [<ffffffff81495138>] do_sys_open+0x2f8/0x600
[   41.348859]  [<ffffffff81494e40>] ? filp_open+0x70/0x70
[   41.354225]  [<ffffffff827187d5>] ? retint_user+0x18/0x3c
[   41.359778]  [<ffffffff811ff175>] ? trace_hardirqs_on_caller+0x385/0x5a0
[   41.366615]  [<ffffffff8149546d>] SyS_open+0x2d/0x40
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[   41.371718]  [<ffffffff82717c21>] entry_SYSCALL_64_fastpath+0x1e/0x9a
[   41.378283] 
[   41.379901] Allocated by task 2146:
[   41.383510]  [<ffffffff8102e3c6>] save_stack_trace+0x26/0x50
[   41.389441]  [<ffffffff81483a22>] kasan_kmalloc.part.0+0x62/0xf0
[   41.395733]  [<ffffffff81483c97>] kasan_kmalloc+0xb7/0xd0
[   41.401406]  [<ffffffff8147fca3>] kmem_cache_alloc_trace+0x123/0x2d0
[   41.408554]  [<ffffffff81a813d0>] alloc_disk_node+0x50/0x3c0
[   41.414481]  [<ffffffff81a8175b>] alloc_disk+0x1b/0x20
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[   41.419883]  [<ffffffff81d42df4>] loop_add+0x384/0x7e0
[   41.425284]  [<ffffffff81d43778>] loop_control_ioctl+0x138/0x320
[   41.431565]  [<ffffffff8159ac13>] compat_SyS_ioctl+0x403/0x2210
[   41.437754]  [<ffffffff8100603d>] do_fast_syscall_32+0x32d/0xa90
[   41.444031]  [<ffffffff827193d0>] sysenter_flags_fixed+0xd/0x1a
[   41.450229] 
[   41.451849] Freed by task 2155:
[   41.455116]  [<ffffffff8102e3c6>] save_stack_trace+0x26/0x50
[   41.461041]  [<ffffffff81484320>] kasan_slab_free+0xb0/0x190
[   41.466963]  [<ffffffff81481744>] kfree+0xf4/0x310
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[   41.472012]  [<ffffffff81a7fbf5>] disk_release+0x255/0x330
[   41.477763]  [<ffffffff81cf706d>] device_release+0x7d/0x220
[   41.483610]  [<ffffffff81ab291c>] kobject_put+0x14c/0x260
[   41.489286]  [<ffffffff81a7d893>] put_disk+0x23/0x30
[   41.494530]  [<ffffffff8154e87c>] __blkdev_get+0x66c/0xdf0
[   41.500288]  [<ffffffff81551288>] blkdev_get+0x2e8/0x920
[   41.505872]  [<ffffffff81551aea>] blkdev_open+0x1aa/0x250
[   41.511533]  [<ffffffff8149101f>] do_dentry_open+0x38f/0xbd0
[   41.517457]  [<ffffffff8149480b>] vfs_open+0x10b/0x210
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[   41.522874]  [<ffffffff814c572f>] path_openat+0x136f/0x4470
[   41.528712]  [<ffffffff814cc401>] do_filp_open+0x1a1/0x270
[   41.534466]  [<ffffffff81495138>] do_sys_open+0x2f8/0x600
[   41.540138]  [<ffffffff8149546d>] SyS_open+0x2d/0x40
[   41.545370]  [<ffffffff82717c21>] entry_SYSCALL_64_fastpath+0x1e/0x9a
[   41.552074] 
[   41.553692] The buggy address belongs to the object at ffff8801d43c5500
[   41.553692]  which belongs to the cache kmalloc-2048 of size 2048
[   41.566522] The buggy address is located 1384 bytes inside of
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[   41.566522]  2048-byte region [ffff8801d43c5500, ffff8801d43c5d00)
[   41.578562] The buggy address belongs to the page:
[   41.583939] ------------[ cut here ]------------
[   41.588714] WARNING: CPU: 0 PID: 2474 at lib/list_debug.c:23 __list_add_valid+0x86/0x120()
[   41.597114] list_add corruption. next->prev should be prev (ffff8801db61f238), but was ffffea000750f000. (next=ffff8800b6500088).
[   41.609009] Kernel panic - not syncing: panic_on_warn set ...
[   41.609009] 
[   41.616376] CPU: 0 PID: 2474 Comm: syz-executor046 Not tainted 4.4.171+ #11
[   41.623478]  0000000000000000 7a3544e017e61b1b ffff8801db607938 ffffffff81aaca21
[   41.631588]  ffff8801db607a88 ffffffff82835ee0 ffffffff8292c140 0000000000000017
[   41.639650]  ffffffff81b0a6d6 ffff8801db607a18 ffffffff813a46b2 0000000041b58ab3
[   41.647737] Call Trace:
[   41.650313]  <IRQ>  [<ffffffff81aaca21>] dump_stack+0xc1/0x120
[   41.656421]  [<ffffffff81b0a6d6>] ? __list_add_valid+0x86/0x120
[   41.662474]  [<ffffffff813a46b2>] panic+0x1b9/0x37b
[   41.667493]  [<ffffffff813a44f9>] ? add_taint.cold+0x16/0x16
[   41.673286]  [<ffffffff81220248>] ? vprintk_emit+0x248/0x820
[   41.679090]  [<ffffffff813a488e>] ? warn_slowpath_common.cold+0x5/0x20
[   41.685752]  [<ffffffff813a48a9>] warn_slowpath_common.cold+0x20/0x20
[   41.692330]  [<ffffffff810d394f>] warn_slowpath_fmt+0xbf/0x100
[   41.698293]  [<ffffffff810d3890>] ? warn_slowpath_common+0x120/0x120
[   41.704784]  [<ffffffff811f455e>] ? cpuacct_charge+0x19e/0x360
[   41.710757]  [<ffffffff81b0a6d6>] __list_add_valid+0x86/0x120
[   41.716650]  [<ffffffff8117cccf>] account_entity_enqueue+0x20f/0x370
[   41.723141]  [<ffffffff8119ee15>] enqueue_task_fair+0x1255/0xb6c0
[   41.729366]  [<ffffffff811bb9f3>] ? select_task_rq_fair+0x483/0x2e90
[   41.735859]  [<ffffffff811636d4>] activate_task+0x154/0x280
[   41.741568]  [<ffffffff8116494e>] ttwu_do_activate.constprop.0+0xbe/0x1e0
[   41.748497]  [<ffffffff81167e31>] try_to_wake_up+0x6d1/0x1110
[   41.754407]  [<ffffffff811689b5>] wake_up_process+0x15/0x20
[   41.760118]  [<ffffffff8125e808>] hrtimer_wakeup+0x48/0x60
[   41.765735]  [<ffffffff8125e7c0>] ? clock_was_set_work+0x30/0x30
[   41.771875]  [<ffffffff8125f84e>] __hrtimer_run_queues+0x34e/0xfc0
[   41.778192]  [<ffffffff8125f500>] ? hrtimer_fixup_init+0x70/0x70
[   41.784342]  [<ffffffff810a19d9>] ? kvm_clock_get_cycles+0x9/0x10
[   41.790573]  [<ffffffff812624b1>] ? hrtimer_interrupt+0x121/0x450
[   41.796804]  [<ffffffff81262546>] hrtimer_interrupt+0x1b6/0x450
[   41.802863]  [<ffffffff8108a9d6>] local_apic_timer_interrupt+0x76/0xa0
[   41.809525]  [<ffffffff8271a2c9>] smp_apic_timer_interrupt+0x79/0xb0
[   41.816010]  [<ffffffff8271961d>] apic_timer_interrupt+0x9d/0xb0
[   41.822140]  <EOI>  [<ffffffff81205d9f>] ? lock_acquire+0x19f/0x450
[   41.828716]  [<ffffffff8139cd22>] ? perf_event_exit_task+0x32/0x9b0
[   41.835119]  [<ffffffff8139cd22>] ? perf_event_exit_task+0x32/0x9b0
[   41.841525]  [<ffffffff8270b4a1>] mutex_lock_nested+0xc1/0xb80
[   41.847493]  [<ffffffff8139cd22>] ? perf_event_exit_task+0x32/0x9b0
[   41.853898]  [<ffffffff827170b5>] ? _raw_spin_unlock_irqrestore+0x45/0x70
[   41.860821]  [<ffffffff81b0cf69>] ? debug_check_no_obj_freed+0x2b9/0x6e0
[   41.867665]  [<ffffffff8270b3e0>] ? mutex_trylock+0x500/0x500
[   41.873550]  [<ffffffff811372d8>] ? switch_task_namespaces+0x38/0xc0
[   41.880039]  [<ffffffff8139cd22>] perf_event_exit_task+0x32/0x9b0
[   41.886270]  [<ffffffff8115d1e0>] ? preempt_count_add+0xc0/0x1d0
[   41.892417]  [<ffffffff81024581>] ? fpu__drop+0xd1/0x110
[   41.897889]  [<ffffffff810216e2>] ? exit_thread+0x132/0x180
[   41.903598]  [<ffffffff810d8b3a>] do_exit+0x8fa/0x2a50
[   41.908876]  [<ffffffff8116892b>] ? wake_up_q+0xbb/0x130
[   41.914342]  [<ffffffff810d8240>] ? release_task+0x14a0/0x14a0
[   41.920318]  [<ffffffff8123a551>] ? debug_lockdep_rcu_enabled+0x71/0xa0
[   41.927070]  [<ffffffff810f5ca4>] ? recalc_sigpending+0x74/0xa0
[   41.933125]  [<ffffffff810f6728>] ? dequeue_signal+0xc8/0x550
[   41.939008]  [<ffffffff81b0a43c>] ? check_preemption_disabled+0x3c/0x200
[   41.945855]  [<ffffffff810dee81>] do_group_exit+0x111/0x300
[   41.951559]  [<ffffffff81100887>] get_signal+0x517/0x1570
[   41.957185]  [<ffffffff827170ca>] ? _raw_spin_unlock_irqrestore+0x5a/0x70
[   41.964133]  [<ffffffff8100bd4c>] do_signal+0x9c/0x1840
[   41.969498]  [<ffffffff81b0a43c>] ? check_preemption_disabled+0x3c/0x200
[   41.976334]  [<ffffffff8100bcb0>] ? setup_sigcontext+0x780/0x780
[   41.982471]  [<ffffffff814c9cab>] ? putname+0xdb/0x120
[   41.987745]  [<ffffffff8123a77b>] ? rcu_read_lock_sched_held+0x10b/0x130
[   41.994578]  [<ffffffff81481284>] ? kmem_cache_free+0x2c4/0x350
[   42.000633]  [<ffffffff812981db>] ? compat_SyS_futex+0x1fb/0x2f0
[   42.006778]  [<ffffffff81494e40>] ? filp_open+0x70/0x70
[   42.012138]  [<ffffffff81003d72>] ? exit_to_usermode_loop+0xf2/0x170
[   42.018623]  [<ffffffff81003da7>] exit_to_usermode_loop+0x127/0x170
[   42.025022]  [<ffffffff810064b9>] do_fast_syscall_32+0x7a9/0xa90
[   42.031163]  [<ffffffff827193d0>] sysenter_flags_fixed+0xd/0x1a
[   43.174368] Shutting down cpus with NMI
[   43.178746] Kernel Offset: disabled
[   43.182582] Rebooting in 86400 seconds..