Killed process 17818 (syz-executor3) total-vm:70600kB, anon-rss:168kB, file-rss:32640kB, shmem-rss:0kB
Out of memory: Kill process 23186 (syz-executor2) score 1004 or sacrifice child
Killed process 23186 (syz-executor2) total-vm:70336kB, anon-rss:160kB, file-rss:32640kB, shmem-rss:0kB
oom_reaper: reaped process 23186 (syz-executor2), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3386 at arch/x86/mm/pat.c:1019 untrack_pfn+0x242/0x290 arch/x86/mm/pat.c:1019
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3386 Comm: kworker/1:2 Not tainted 4.9.145+ #81
Workqueue: events mmput_async_fn
 ffff8801d3a57858 ffffffff81b43a59 ffffffff82a39060 00000000ffffffff
 ffffffff82a34400 0000000000000001 0000000000000009 ffff8801d3a57918
 ffffffff813f7575 0000000041b58ab3 ffffffff82e2aa5b ffffffff813f73b6
Call Trace:
 [<ffffffff81b43a59>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b43a59>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff813f7575>] panic+0x1bf/0x39f kernel/panic.c:179
 [<ffffffff813f77b2>] __warn.cold.8+0x2f/0x2f kernel/panic.c:542
 [<ffffffff810dc0bc>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff810bea52>] untrack_pfn+0x242/0x290 arch/x86/mm/pat.c:1019
 [<ffffffff8149a5c1>] unmap_single_vma+0x141/0x170 mm/memory.c:1315
 [<ffffffff8149aca1>] unmap_vmas+0x81/0xd0 mm/memory.c:1366
 [<ffffffff814b0d7c>] exit_mmap+0x1cc/0x3a0 mm/mmap.c:3021
 [<ffffffff810d239b>] __mmput kernel/fork.c:884 [inline]
 [<ffffffff810d239b>] mmput_async_fn+0xab/0x330 kernel/fork.c:914
 [<ffffffff81131091>] process_one_work+0x831/0x15f0 kernel/workqueue.c:2092
 [<ffffffff81131f26>] worker_thread+0xd6/0x1140 kernel/workqueue.c:2226
 [<ffffffff81142ccd>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff82819fdc>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Kernel Offset: disabled