[ OK ] Started OpenBSD Secure Shell server. [ OK ] Found device /dev/ttyS0. [ OK ] Started Getty on tty6. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.95' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.161366][ T8453] ------------[ cut here ]------------ [ 48.167061][ T8453] WARNING: CPU: 0 PID: 8453 at mm/page_alloc.c:4976 __alloc_pages_nodemask+0x4e5/0x5a0 [ 48.177616][ T8453] Modules linked in: [ 48.181776][ T8453] CPU: 1 PID: 8453 Comm: syz-executor915 Not tainted 5.11.0-rc3-syzkaller #0 [ 48.190924][ T8453] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.201361][ T8453] RIP: 0010:__alloc_pages_nodemask+0x4e5/0x5a0 [ 48.207610][ T8453] Code: aa 09 00 e9 dd fd ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c eb fd ff ff 4c 89 ef e8 54 aa 09 00 8b 74 24 18 e9 da fd ff ff <0f> 0b e9 f3 fd ff ff a9 00 00 08 00 75 16 8b 4c 24 1c 89 cb 81 e3 [ 48.227537][ T8453] RSP: 0018:ffffc90001047a60 EFLAGS: 00010246 [ 48.233611][ T8453] RAX: ffffc90001047ae0 RBX: ffffc90001047ae0 RCX: 0000000000000000 [ 48.241743][ T8453] RDX: 0000000000000028 RSI: 0000000000000000 RDI: ffffc90001047b08 [ 48.249837][ T8453] RBP: ffffc90001047ba0 R08: dffffc0000000000 R09: ffffc90001047ae0 [ 48.258060][ T8453] R10: fffff52000208f61 R11: 0000000000000000 R12: dffffc0000000000 [ 48.266362][ T8453] R13: 000000000000000c R14: 1ffff92000208f58 R15: 0000000000040cc0 [ 48.274349][ T8453] FS: 0000000000ef8880(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 48.283432][ T8453] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.290516][ T8453] CR2: 00007fcb9592bf38 CR3: 0000000017fee000 CR4: 00000000001506e0 [ 48.298671][ T8453] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.306714][ T8453] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.314711][ T8453] Call Trace: [ 48.318040][ T8453] ? gfp_pfmemalloc_allowed+0x120/0x120 [ 48.323619][ T8453] ? alloc_pages_current+0x2e5/0x520 [ 48.329154][ T8453] kmalloc_order+0x40/0x130 [ 48.333667][ T8453] ? rcu_lock_release+0x5/0x20 [ 48.338528][ T8453] kmalloc_order_trace+0x15/0x70 [ 48.343463][ T8453] __kmalloc_track_caller+0x246/0x330 [ 48.348914][ T8453] ? cap_capable+0x27e/0x2d0 [ 48.353515][ T8453] memdup_user_nul+0x26/0xf0 [ 48.358165][ T8453] smk_write_syslog+0x29/0x90 [ 48.362944][ T8453] ? smk_read_syslog+0xe0/0xe0 [ 48.367754][ T8453] vfs_write+0x289/0xc90 [ 48.372001][ T8453] ? kmem_cache_free+0x10e/0x160 [ 48.376988][ T8453] ? fd_install+0x277/0x4c0 [ 48.381596][ T8453] ? file_end_write+0x220/0x220 [ 48.386509][ T8453] ? do_sys_openat2+0x38f/0x460 [ 48.391402][ T8453] ? do_sys_open+0x220/0x220 [ 48.395985][ T8453] ? __fdget_pos+0x25e/0x2f0 [ 48.400633][ T8453] ksys_write+0x171/0x2a0 [ 48.404968][ T8453] ? __ia32_sys_read+0x80/0x80 [ 48.409793][ T8453] ? syscall_enter_from_user_mode+0x24/0x190 [ 48.415898][ T8453] ? syscall_enter_from_user_mode+0x24/0x190 [ 48.422033][ T8453] do_syscall_64+0x2d/0x70 [ 48.426552][ T8453] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 48.432463][ T8453] RIP: 0033:0x440249 [ 48.436403][ T8453] 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 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 48.456121][ T8453] RSP: 002b:00007ffdedc36ac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 48.464561][ T8453] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440249 [ 48.473146][ T8453] RDX: 0000000000f0ff7f RSI: 0000000000000000 RDI: 0000000000000003 [ 48.481208][ T8453] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 48.489251][ T8453] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a50 [ 48.497476][ T8453] R13: 0000000000401ae0 R14: 0000000000000000 R15: 0000000000000000 [ 48.505476][ T8453] Kernel panic - not syncing: panic_on_warn set ... [ 48.512054][ T8453] CPU: 1 PID: 8453 Comm: syz-executor915 Not tainted 5.11.0-rc3-syzkaller #0 [ 48.520796][ T8453] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.530931][ T8453] Call Trace: [ 48.534200][ T8453] dump_stack+0x183/0x22e [ 48.538529][ T8453] ? log_buf_vmcoreinfo_setup+0x45d/0x45d [ 48.544230][ T8453] ? show_regs_print_info+0x12/0x12 [ 48.549504][ T8453] panic+0x2e1/0x850 [ 48.553381][ T8453] ? __kernel_text_address+0x93/0x100 [ 48.558738][ T8453] ? __warn+0x13e/0x270 [ 48.562887][ T8453] ? nmi_panic+0x90/0x90 [ 48.567118][ T8453] __warn+0x26a/0x270 [ 48.571096][ T8453] ? __alloc_pages_nodemask+0x4e5/0x5a0 [ 48.576630][ T8453] ? __alloc_pages_nodemask+0x4e5/0x5a0 [ 48.582274][ T8453] report_bug+0x1b1/0x2e0 [ 48.586598][ T8453] handle_bug+0x3d/0x70 [ 48.590735][ T8453] exc_invalid_op+0x16/0x40 [ 48.595220][ T8453] asm_exc_invalid_op+0x12/0x20 [ 48.600070][ T8453] RIP: 0010:__alloc_pages_nodemask+0x4e5/0x5a0 [ 48.606300][ T8453] Code: aa 09 00 e9 dd fd ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c eb fd ff ff 4c 89 ef e8 54 aa 09 00 8b 74 24 18 e9 da fd ff ff <0f> 0b e9 f3 fd ff ff a9 00 00 08 00 75 16 8b 4c 24 1c 89 cb 81 e3 [ 48.625883][ T8453] RSP: 0018:ffffc90001047a60 EFLAGS: 00010246 [ 48.631931][ T8453] RAX: ffffc90001047ae0 RBX: ffffc90001047ae0 RCX: 0000000000000000 [ 48.639882][ T8453] RDX: 0000000000000028 RSI: 0000000000000000 RDI: ffffc90001047b08 [ 48.647831][ T8453] RBP: ffffc90001047ba0 R08: dffffc0000000000 R09: ffffc90001047ae0 [ 48.655778][ T8453] R10: fffff52000208f61 R11: 0000000000000000 R12: dffffc0000000000 [ 48.663726][ T8453] R13: 000000000000000c R14: 1ffff92000208f58 R15: 0000000000040cc0 [ 48.671705][ T8453] ? gfp_pfmemalloc_allowed+0x120/0x120 [ 48.677255][ T8453] ? alloc_pages_current+0x2e5/0x520 [ 48.682524][ T8453] kmalloc_order+0x40/0x130 [ 48.687007][ T8453] ? rcu_lock_release+0x5/0x20 [ 48.691767][ T8453] kmalloc_order_trace+0x15/0x70 [ 48.696684][ T8453] __kmalloc_track_caller+0x246/0x330 [ 48.702035][ T8453] ? cap_capable+0x27e/0x2d0 [ 48.706641][ T8453] memdup_user_nul+0x26/0xf0 [ 48.711212][ T8453] smk_write_syslog+0x29/0x90 [ 48.715874][ T8453] ? smk_read_syslog+0xe0/0xe0 [ 48.720620][ T8453] vfs_write+0x289/0xc90 [ 48.724851][ T8453] ? kmem_cache_free+0x10e/0x160 [ 48.729834][ T8453] ? fd_install+0x277/0x4c0 [ 48.734341][ T8453] ? file_end_write+0x220/0x220 [ 48.739194][ T8453] ? do_sys_openat2+0x38f/0x460 [ 48.744085][ T8453] ? do_sys_open+0x220/0x220 [ 48.748678][ T8453] ? __fdget_pos+0x25e/0x2f0 [ 48.753264][ T8453] ksys_write+0x171/0x2a0 [ 48.757579][ T8453] ? __ia32_sys_read+0x80/0x80 [ 48.762344][ T8453] ? syscall_enter_from_user_mode+0x24/0x190 [ 48.768311][ T8453] ? syscall_enter_from_user_mode+0x24/0x190 [ 48.774271][ T8453] do_syscall_64+0x2d/0x70 [ 48.778666][ T8453] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 48.784549][ T8453] RIP: 0033:0x440249 [ 48.788423][ T8453] 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 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 48.808022][ T8453] RSP: 002b:00007ffdedc36ac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 48.816419][ T8453] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440249 [ 48.824370][ T8453] RDX: 0000000000f0ff7f RSI: 0000000000000000 RDI: 0000000000000003 [ 48.832319][ T8453] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 48.840290][ T8453] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a50 [ 48.848267][ T8453] R13: 0000000000401ae0 R14: 0000000000000000 R15: 0000000000000000 [ 48.857362][ T8453] Kernel Offset: disabled [ 48.861785][ T8453] Rebooting in 86400 seconds..