[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.3' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 58.440368][ T7021] ------------[ cut here ]------------ [ 58.446158][ T7021] memtype_reserve failed: [mem 0xffffffffff000-0x003fefff], req write-back [ 58.455941][ T7021] WARNING: CPU: 0 PID: 7021 at arch/x86/mm/pat/memtype.c:589 memtype_reserve+0x69f/0x820 [ 58.465998][ T7021] Kernel panic - not syncing: panic_on_warn set ... [ 58.472572][ T7021] CPU: 0 PID: 7021 Comm: syz-executor943 Not tainted 5.7.0-rc4-syzkaller #0 [ 58.481477][ T7021] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.491694][ T7021] Call Trace: [ 58.494970][ T7021] dump_stack+0x188/0x20d [ 58.499287][ T7021] ? memtype_reserve+0x680/0x820 [ 58.504201][ T7021] panic+0x2e3/0x75c [ 58.508080][ T7021] ? add_taint.cold+0x16/0x16 [ 58.512737][ T7021] ? __probe_kernel_read+0x188/0x1d0 [ 58.518021][ T7021] ? __warn.cold+0x14/0x35 [ 58.522421][ T7021] ? __warn+0xd5/0x1c8 [ 58.526506][ T7021] ? memtype_reserve+0x69f/0x820 [ 58.531603][ T7021] __warn.cold+0x2f/0x35 [ 58.535836][ T7021] ? irq_work_queue+0xc3/0x100 [ 58.540586][ T7021] ? memtype_reserve+0x69f/0x820 [ 58.545591][ T7021] report_bug+0x27b/0x2f0 [ 58.549896][ T7021] do_error_trap+0x12b/0x220 [ 58.554552][ T7021] ? memtype_reserve+0x69f/0x820 [ 58.559474][ T7021] do_invalid_op+0x32/0x40 [ 58.563865][ T7021] ? memtype_reserve+0x69f/0x820 [ 58.569211][ T7021] invalid_op+0x23/0x30 [ 58.573630][ T7021] RIP: 0010:memtype_reserve+0x69f/0x820 [ 58.579172][ T7021] Code: 48 8b 2c ed c0 00 29 88 e8 ae ad 3e 00 48 8d 4b ff 49 89 e8 4c 89 e2 48 c7 c6 20 01 29 88 48 c7 c7 80 f9 28 88 e8 79 e8 0f 00 <0f> 0b 41 bf ea ff ff ff e9 03 fc ff ff 41 bf ea ff ff ff e9 f8 fb [ 58.600238][ T7021] RSP: 0018:ffffc90000f87790 EFLAGS: 00010282 [ 58.606283][ T7021] RAX: 0000000000000000 RBX: 00000000003ff000 RCX: 0000000000000000 [ 58.614339][ T7021] RDX: 0000000000000000 RSI: ffffffff815ce181 RDI: fffff520001f0ee4 [ 58.622302][ T7021] RBP: ffffffff8828ff40 R08: ffff88809a132100 R09: ffffed1015cc66a9 [ 58.630260][ T7021] R10: ffff8880ae633547 R11: ffffed1015cc66a8 R12: 000ffffffffff000 [ 58.638243][ T7021] R13: 1ffff920001f0ef8 R14: dffffc0000000000 R15: 0000000000000000 [ 58.646224][ T7021] ? vprintk_func+0x81/0x17e [ 58.650809][ T7021] ? __lock_acquire+0x2184/0x4c50 [ 58.655985][ T7021] ? pat_init+0x440/0x440 [ 58.660365][ T7021] ? __init_cache_modes+0x270/0x270 [ 58.665572][ T7021] reserve_pfn_range+0x173/0x470 [ 58.670492][ T7021] ? arch_io_reserve_memtype_wc+0xa0/0xa0 [ 58.676193][ T7021] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.682581][ T7021] ? ksys_mmap_pgoff+0x457/0x5b0 [ 58.687502][ T7021] track_pfn_remap+0x18b/0x280 [ 58.692256][ T7021] remap_pfn_range+0x202/0xbf0 [ 58.697024][ T7021] ? __kmalloc+0x75f/0x7a0 [ 58.701427][ T7021] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.706969][ T7021] ? __kasan_kmalloc.constprop.0+0x75/0xd0 [ 58.712844][ T7021] ? copy_page_range+0x1f00/0x1f00 [ 58.717934][ T7021] ? __kmalloc+0x62f/0x7a0 [ 58.722323][ T7021] ? hcd_buffer_alloc+0x1ed/0x290 [ 58.727326][ T7021] dma_direct_mmap+0x197/0x260 [ 58.732078][ T7021] dma_mmap_attrs+0xfe/0x150 [ 58.736677][ T7021] usbdev_mmap+0x3ae/0x730 [ 58.741091][ T7021] ? usbdev_vm_close+0x40/0x40 [ 58.745845][ T7021] mmap_region+0xafb/0x1540 [ 58.750354][ T7021] ? __x64_sys_brk+0x6e0/0x6e0 [ 58.755100][ T7021] ? security_mmap_addr+0x81/0xa0 [ 58.760115][ T7021] ? get_unmapped_area+0x2a0/0x3c0 [ 58.765207][ T7021] do_mmap+0x849/0x1160 [ 58.769354][ T7021] vm_mmap_pgoff+0x197/0x200 [ 58.773938][ T7021] ? randomize_stack_top+0x100/0x100 [ 58.779209][ T7021] ? ksys_dup3+0x3c0/0x3c0 [ 58.783615][ T7021] ksys_mmap_pgoff+0x457/0x5b0 [ 58.788357][ T7021] ? find_mergeable_anon_vma+0x2c0/0x2c0 [ 58.793965][ T7021] ? trace_hardirqs_off_caller+0x55/0x230 [ 58.800010][ T7021] do_fast_syscall_32+0x270/0xe90 [ 58.805015][ T7021] entry_SYSENTER_compat+0x70/0x7f [ 58.812156][ T7021] Kernel Offset: disabled [ 58.816551][ T7021] Rebooting in 86400 seconds..