audit: type=1400 audit(1567321703.929:91): avc: denied { map } for pid=10760 comm="syz-executor.0" path="/root/syzkaller-testdir892273644/syzkaller.GMcNLO/197/file0/mem" dev="devtmpfs" ino=13688 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:memory_device_t:s0 tclass=chr_file permissive=1 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 10763 at arch/x86/kernel/cpu/mtrr/generic.c:216 mtrr_type_lookup_variable+0x4ca/0x670 arch/x86/kernel/cpu/mtrr/generic.c:216 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 10763 Comm: syz-executor.0 Not tainted 4.14.141 #37 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x197 lib/dump_stack.c:53 panic+0x1f2/0x426 kernel/panic.c:182 __warn.cold+0x2f/0x36 kernel/panic.c:546 report_bug+0x216/0x254 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x1bb/0x310 arch/x86/kernel/traps.c:295 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:963 RIP: 0010:mtrr_type_lookup_variable+0x4ca/0x670 arch/x86/kernel/cpu/mtrr/generic.c:216 RSP: 0018:ffff88805d93f7b0 EFLAGS: 00010212 RAX: 0000000000040000 RBX: 00000000c0000000 RCX: ffffc90005e45000 RDX: 0000000000006b27 RSI: ffffffff81253d6a RDI: ffffffff885be4ec RBP: ffff88805d93f880 R08: ffff88805d93f8f8 R09: 0000000000000001 R10: 0000000000000000 R11: ffff88805e02e080 R12: 00003fffc0000000 R13: 0000000000000000 R14: 0000000040000000 R15: dffffc0000000000 mtrr_type_lookup+0x10e/0x370 arch/x86/kernel/cpu/mtrr/generic.c:285 pat_x_mtrr_type arch/x86/mm/pat.c:395 [inline] reserve_memtype arch/x86/mm/pat.c:558 [inline] reserve_memtype+0x2f4/0x640 arch/x86/mm/pat.c:528 reserve_pfn_range+0x11c/0x390 arch/x86/mm/pat.c:868 track_pfn_remap+0x15a/0x240 arch/x86/mm/pat.c:960 remap_pfn_range+0x1bc/0xaa0 mm/memory.c:2108 mmap_mem+0x1e1/0x281 drivers/char/mem.c:387 call_mmap include/linux/fs.h:1782 [inline] mmap_region+0x852/0x1030 mm/mmap.c:1723 do_mmap+0x5b8/0xcd0 mm/mmap.c:1501 do_mmap_pgoff include/linux/mm.h:2178 [inline] vm_mmap_pgoff+0x17a/0x1d0 mm/util.c:333 SYSC_mmap_pgoff mm/mmap.c:1551 [inline] SyS_mmap_pgoff+0x3ca/0x520 mm/mmap.c:1509 SYSC_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459879 RSP: 002b:00007f6c1c7aac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459879 RDX: 0000000000000000 RSI: 0000000000002000 RDI: 0000000020ffd000 RBP: 000000000075bf20 R08: 0000000000000003 R09: 00200000bffff000 R10: 0000000000002012 R11: 0000000000000246 R12: 00007f6c1c7ab6d4 R13: 00000000004c5d7b R14: 00000000004da810 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..