[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.119' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 58.197237][ T7031] ------------[ cut here ]------------ [ 58.203205][ T7031] memtype_reserve failed: [mem 0xffffffffff000-0x003fefff], req write-back [ 58.213669][ T7031] WARNING: CPU: 1 PID: 7031 at arch/x86/mm/pat/memtype.c:589 memtype_reserve+0x69f/0x820 [ 58.223485][ T7031] Kernel panic - not syncing: panic_on_warn set ... [ 58.230057][ T7031] CPU: 1 PID: 7031 Comm: syz-executor000 Not tainted 5.7.0-rc4-syzkaller #0 [ 58.238703][ T7031] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.248842][ T7031] Call Trace: [ 58.252171][ T7031] dump_stack+0x188/0x20d [ 58.256504][ T7031] ? memtype_reserve+0x680/0x820 [ 58.261432][ T7031] panic+0x2e3/0x75c [ 58.265313][ T7031] ? add_taint.cold+0x16/0x16 [ 58.269989][ T7031] ? __probe_kernel_read+0x188/0x1d0 [ 58.275685][ T7031] ? __warn.cold+0x14/0x35 [ 58.280078][ T7031] ? __warn+0xd5/0x1c8 [ 58.284128][ T7031] ? memtype_reserve+0x69f/0x820 [ 58.289049][ T7031] __warn.cold+0x2f/0x35 [ 58.293370][ T7031] ? irq_work_queue+0xc3/0x100 [ 58.299154][ T7031] ? memtype_reserve+0x69f/0x820 [ 58.304068][ T7031] report_bug+0x27b/0x2f0 [ 58.308495][ T7031] do_error_trap+0x12b/0x220 [ 58.313061][ T7031] ? memtype_reserve+0x69f/0x820 [ 58.317983][ T7031] do_invalid_op+0x32/0x40 [ 58.322376][ T7031] ? memtype_reserve+0x69f/0x820 [ 58.327299][ T7031] invalid_op+0x23/0x30 [ 58.331436][ T7031] RIP: 0010:memtype_reserve+0x69f/0x820 [ 58.336957][ T7031] 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 [ 58.356553][ T7031] RSP: 0018:ffffc90003b17790 EFLAGS: 00010282 [ 58.362600][ T7031] RAX: 0000000000000000 RBX: 00000000003ff000 RCX: 0000000000000000 [ 58.370650][ T7031] RDX: 0000000000000000 RSI: ffffffff815ce181 RDI: fffff52000762ee4 [ 58.378616][ T7031] RBP: ffffffff8828ff40 R08: ffff88809355c3c0 R09: ffffed1015ce66a9 [ 58.386685][ T7031] R10: ffff8880ae733547 R11: ffffed1015ce66a8 R12: 000ffffffffff000 [ 58.394938][ T7031] R13: 1ffff92000762ef8 R14: dffffc0000000000 R15: 0000000000000000 [ 58.403218][ T7031] ? vprintk_func+0x81/0x17e [ 58.407833][ T7031] ? __lock_acquire+0x2184/0x4c50 [ 58.413797][ T7031] ? pat_init+0x440/0x440 [ 58.418129][ T7031] ? __init_cache_modes+0x270/0x270 [ 58.423502][ T7031] reserve_pfn_range+0x173/0x470 [ 58.428523][ T7031] ? arch_io_reserve_memtype_wc+0xa0/0xa0 [ 58.434244][ T7031] ? print_usage_bug+0x240/0x240 [ 58.439187][ T7031] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.445667][ T7031] ? ksys_mmap_pgoff+0x457/0x5b0 [ 58.450606][ T7031] track_pfn_remap+0x18b/0x280 [ 58.455373][ T7031] remap_pfn_range+0x202/0xbf0 [ 58.460138][ T7031] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 58.465614][ T7031] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.471148][ T7031] ? __kasan_kmalloc.constprop.0+0x75/0xd0 [ 58.477727][ T7031] ? copy_page_range+0x1f00/0x1f00 [ 58.482819][ T7031] ? __kmalloc+0x62f/0x7a0 [ 58.487240][ T7031] ? hcd_buffer_alloc+0x1ed/0x290 [ 58.492266][ T7031] dma_direct_mmap+0x197/0x260 [ 58.497027][ T7031] dma_mmap_attrs+0xfe/0x150 [ 58.501804][ T7031] usbdev_mmap+0x3ae/0x730 [ 58.506221][ T7031] ? usbdev_vm_close+0x40/0x40 [ 58.510988][ T7031] mmap_region+0xafb/0x1540 [ 58.517069][ T7031] ? __x64_sys_brk+0x6e0/0x6e0 [ 58.522610][ T7031] ? security_mmap_addr+0x81/0xa0 [ 58.527613][ T7031] ? get_unmapped_area+0x2a0/0x3c0 [ 58.532707][ T7031] do_mmap+0x849/0x1160 [ 58.536860][ T7031] vm_mmap_pgoff+0x197/0x200 [ 58.541430][ T7031] ? randomize_stack_top+0x100/0x100 [ 58.546778][ T7031] ? ksys_dup3+0x3c0/0x3c0 [ 58.551193][ T7031] ksys_mmap_pgoff+0x457/0x5b0 [ 58.555935][ T7031] ? find_mergeable_anon_vma+0x2c0/0x2c0 [ 58.561557][ T7031] ? trace_hardirqs_off_caller+0x55/0x230 [ 58.567348][ T7031] do_fast_syscall_32+0x270/0xe90 [ 58.572376][ T7031] entry_SYSENTER_compat+0x70/0x7f [ 58.579196][ T7031] Kernel Offset: disabled [ 58.583566][ T7031] Rebooting in 86400 seconds..