[ OK ] Started Daily apt upgrade and clean activities. [ OK ] Reached target Timers. Starting OpenBSD Secure Shell server... Starting getty on tty2-tty6 if dbus and logind are not available... Starting Permit User Sessions... [ OK ] Started System Logging Service. [ OK ] Found device /dev/ttyS0. [ OK ] Started Permit User Sessions. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.8' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 68.098567][ T27] audit: type=1400 audit(1588994636.176:8): avc: denied { execmem } for pid=7037 comm="syz-executor412" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 68.103691][ T7037] ------------[ cut here ]------------ [ 68.124830][ T7037] memtype_reserve failed: [mem 0xffffffffff000-0x003fefff], req write-back [ 68.133572][ T7037] WARNING: CPU: 1 PID: 7037 at arch/x86/mm/pat/memtype.c:589 memtype_reserve+0x69f/0x820 [ 68.143454][ T7037] Kernel panic - not syncing: panic_on_warn set ... [ 68.150105][ T7037] CPU: 1 PID: 7037 Comm: syz-executor412 Not tainted 5.7.0-rc4-syzkaller #0 [ 68.158783][ T7037] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.168835][ T7037] Call Trace: [ 68.172132][ T7037] dump_stack+0x188/0x20d [ 68.176448][ T7037] ? memtype_reserve+0x680/0x820 [ 68.181407][ T7037] panic+0x2e3/0x75c [ 68.185281][ T7037] ? add_taint.cold+0x16/0x16 [ 68.189941][ T7037] ? __probe_kernel_read+0x188/0x1d0 [ 68.195225][ T7037] ? __warn.cold+0x14/0x35 [ 68.199622][ T7037] ? __warn+0xd5/0x1c8 [ 68.203668][ T7037] ? memtype_reserve+0x69f/0x820 [ 68.208582][ T7037] __warn.cold+0x2f/0x35 [ 68.212813][ T7037] ? irq_work_queue+0xc3/0x100 [ 68.217709][ T7037] ? memtype_reserve+0x69f/0x820 [ 68.222642][ T7037] report_bug+0x27b/0x2f0 [ 68.226957][ T7037] do_error_trap+0x12b/0x220 [ 68.231551][ T7037] ? memtype_reserve+0x69f/0x820 [ 68.236587][ T7037] do_invalid_op+0x32/0x40 [ 68.240982][ T7037] ? memtype_reserve+0x69f/0x820 [ 68.245898][ T7037] invalid_op+0x23/0x30 [ 68.250032][ T7037] RIP: 0010:memtype_reserve+0x69f/0x820 [ 68.259821][ T7037] 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 [ 68.279402][ T7037] RSP: 0018:ffffc90000f877a0 EFLAGS: 00010282 [ 68.285448][ T7037] RAX: 0000000000000000 RBX: 00000000003ff000 RCX: 0000000000000000 [ 68.293394][ T7037] RDX: 0000000000000000 RSI: ffffffff815ce181 RDI: fffff520001f0ee6 [ 68.301349][ T7037] RBP: ffffffff8828ff40 R08: ffff888093ff83c0 R09: ffffed1015ce66a9 [ 68.309313][ T7037] R10: ffff8880ae733547 R11: ffffed1015ce66a8 R12: 000ffffffffff000 [ 68.317260][ T7037] R13: 1ffff920001f0efa R14: dffffc0000000000 R15: 0000000000000000 [ 68.325222][ T7037] ? vprintk_func+0x81/0x17e [ 68.329811][ T7037] ? __lock_acquire+0x2184/0x4c50 [ 68.334904][ T7037] ? pat_init+0x440/0x440 [ 68.339225][ T7037] ? __init_cache_modes+0x270/0x270 [ 68.344401][ T7037] reserve_pfn_range+0x173/0x470 [ 68.349352][ T7037] ? arch_io_reserve_memtype_wc+0xa0/0xa0 [ 68.355060][ T7037] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.361034][ T7037] ? ksys_mmap_pgoff+0x457/0x5b0 [ 68.365952][ T7037] track_pfn_remap+0x18b/0x280 [ 68.370698][ T7037] remap_pfn_range+0x202/0xbf0 [ 68.375450][ T7037] ? __kmalloc+0x75f/0x7a0 [ 68.379863][ T7037] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.385409][ T7037] ? __kasan_kmalloc.constprop.0+0x75/0xd0 [ 68.391208][ T7037] ? copy_page_range+0x1f00/0x1f00 [ 68.396409][ T7037] ? __kmalloc+0x62f/0x7a0 [ 68.400814][ T7037] ? hcd_buffer_alloc+0x1ed/0x290 [ 68.405833][ T7037] dma_direct_mmap+0x197/0x260 [ 68.410592][ T7037] dma_mmap_attrs+0xfe/0x150 [ 68.415159][ T7037] usbdev_mmap+0x3ae/0x730 [ 68.419564][ T7037] ? usbdev_vm_close+0x40/0x40 [ 68.424308][ T7037] mmap_region+0xafb/0x1540 [ 68.428808][ T7037] ? __x64_sys_brk+0x6e0/0x6e0 [ 68.433546][ T7037] ? security_mmap_addr+0x81/0xa0 [ 68.438549][ T7037] ? get_unmapped_area+0x2a0/0x3c0 [ 68.443651][ T7037] do_mmap+0x849/0x1160 [ 68.447792][ T7037] vm_mmap_pgoff+0x197/0x200 [ 68.452383][ T7037] ? randomize_stack_top+0x100/0x100 [ 68.457660][ T7037] ? ksys_dup3+0x3c0/0x3c0 [ 68.462067][ T7037] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 68.467588][ T7037] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.473646][ T7037] ksys_mmap_pgoff+0x457/0x5b0 [ 68.478476][ T7037] ? find_mergeable_anon_vma+0x2c0/0x2c0 [ 68.484086][ T7037] ? trace_hardirqs_off_caller+0x55/0x230 [ 68.489787][ T7037] do_syscall_64+0xf6/0x7d0 [ 68.494313][ T7037] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 68.500190][ T7037] RIP: 0033:0x443e79 [ 68.504086][ T7037] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 68.523664][ T7037] RSP: 002b:00007fff60e220d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 [ 68.532064][ T7037] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443e79 [ 68.540032][ T7037] RDX: 0000000003000009 RSI: 0000000000400000 RDI: 0000000020000000 [ 68.547994][ T7037] RBP: 00000000006ce018 R08: 0000000000000003 R09: 0000000000000000 [ 68.555940][ T7037] R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000401b80 [ 68.563886][ T7037] R13: 0000000000401c10 R14: 0000000000000000 R15: 0000000000000000 [ 68.573258][ T7037] Kernel Offset: disabled [ 68.577714][ T7037] Rebooting in 86400 seconds..