------------[ cut here ]------------ WARNING: CPU: 0 PID: 6862 at arch/x86/mm/pat.c:1017 untrack_pfn+0x214/0x270 arch/x86/mm/pat.c:1017() Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 6862 Comm: syz-executor.1 Not tainted 4.4.174+ #17 0000000000000000 d68f2feeccbea50e ffff8801d81d7740 ffffffff81aad1a1 0000000000000000 ffffffff82835ee0 ffffffff82831440 00000000000003f9 ffffffff810b6b24 ffff8801d81d7820 ffffffff813a48c2 0000000041b58ab3 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [] panic+0x1b9/0x37b kernel/panic.c:112 [] warn_slowpath_common kernel/panic.c:455 [inline] [] warn_slowpath_common.cold+0x20/0x20 kernel/panic.c:435 [] warn_slowpath_null+0x2a/0x30 kernel/panic.c:492 [] untrack_pfn+0x214/0x270 arch/x86/mm/pat.c:1017 [] unmap_single_vma+0xe2e/0x1090 mm/memory.c:1322 [] unmap_vmas+0x48/0xa0 mm/memory.c:1373 [] unmap_region+0x1a9/0x320 mm/mmap.c:2499 [] do_munmap+0x4ca/0xcf0 mm/mmap.c:2696 [] move_vma+0x50e/0x920 mm/mremap.c:334 [] mremap_to mm/mremap.c:453 [inline] [] SYSC_mremap mm/mremap.c:516 [inline] [] SyS_mremap+0x9dd/0xd60 mm/mremap.c:483 [] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline] [] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397 [] sysenter_flags_fixed+0xd/0x1a Kernel Offset: disabled Rebooting in 86400 seconds..