[ 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 '10.128.0.233' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 847.943930][ T27] audit: type=1400 audit(1594349223.307:8): avc: denied { execmem } for pid=6813 comm="syz-executor249" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 848.012952][ T6832] IPVS: ftp: loaded support on port[0] = 21 [ 848.029920][ T6833] IPVS: ftp: loaded support on port[0] = 21 [ 848.049235][ T6834] IPVS: ftp: loaded support on port[0] = 21 [ 848.049656][ T6837] IPVS: ftp: loaded support on port[0] = 21 [ 848.060671][ T6836] IPVS: ftp: loaded support on port[0] = 21 [ 848.077266][ T6835] IPVS: ftp: loaded support on port[0] = 21 executing program [ 848.357396][ T6952] IPVS: ftp: loaded support on port[0] = 21 [ 848.374797][ T40] tipc: TX() has been purged, node left! executing program [ 848.672855][ T7008] IPVS: ftp: loaded support on port[0] = 21 executing program [ 848.837369][ T7045] IPVS: ftp: loaded support on port[0] = 21 executing program [ 852.449677][ T7086] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program [ 852.801400][ T7113] IPVS: ftp: loaded support on port[0] = 21 [ 852.813681][ T7114] IPVS: ftp: loaded support on port[0] = 21 [ 852.826929][ T7115] IPVS: ftp: loaded support on port[0] = 21 executing program executing program [ 853.200415][ T7179] IPVS: ftp: loaded support on port[0] = 21 [ 853.205007][ T7178] IPVS: ftp: loaded support on port[0] = 21 executing program executing program [ 853.478908][ T7236] IPVS: ftp: loaded support on port[0] = 21 [ 853.574058][ T7250] IPVS: ftp: loaded support on port[0] = 21 [ 853.583900][ T40] tipc: TX() has been purged, node left! [ 853.590655][ T40] tipc: TX() has been purged, node left! [ 853.603898][ T40] tipc: TX() has been purged, node left! [ 853.614317][ T40] tipc: TX() has been purged, node left! executing program [ 856.072263][ T7314] IPVS: ftp: loaded support on port[0] = 21 executing program [ 856.481781][ T7337] IPVS: ftp: loaded support on port[0] = 21 executing program [ 856.797811][ T7360] IPVS: ftp: loaded support on port[0] = 21 executing program [ 857.109033][ T7383] IPVS: ftp: loaded support on port[0] = 21 executing program executing program [ 857.369818][ T7409] IPVS: ftp: loaded support on port[0] = 21 [ 857.377348][ T7408] IPVS: ftp: loaded support on port[0] = 21 executing program executing program [ 857.726977][ T7448] IPVS: ftp: loaded support on port[0] = 21 [ 857.826257][ T7459] IPVS: ftp: loaded support on port[0] = 21 executing program executing program [ 857.991152][ T7499] IPVS: ftp: loaded support on port[0] = 21 [ 857.991642][ T7494] IPVS: ftp: loaded support on port[0] = 21 [ 858.018072][ T7459] general protection fault, probably for non-canonical address 0xdffffc0000000080: 0000 [#1] PREEMPT SMP KASAN [ 858.029780][ T7459] KASAN: null-ptr-deref in range [0x0000000000000400-0x0000000000000407] [ 858.038301][ T7459] CPU: 0 PID: 7459 Comm: syz-executor249 Not tainted 5.8.0-rc4-syzkaller #0 [ 858.046960][ T7459] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 858.057111][ T7459] RIP: 0010:free_netdev+0x41/0x480 [ 858.062218][ T7459] Code: d2 be 2b 27 00 00 48 c7 c7 40 5c fd 88 e8 37 04 1d fb 48 8d bd 00 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f4 03 00 00 48 8b bd 00 04 00 00 e8 b9 6c 6a fb [ 858.081801][ T7459] RSP: 0018:ffffc90002a27c10 EFLAGS: 00010202 [ 858.088301][ T7459] RAX: dffffc0000000000 RBX: ffff8880a224a000 RCX: ffffffff86f886ab [ 858.096254][ T7459] RDX: 0000000000000080 RSI: ffffffff89bc1100 RDI: 0000000000000400 [ 858.104213][ T7459] RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88809e9ae023 [ 858.112171][ T7459] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff4 [ 858.120134][ T7459] R13: ffff88808604d410 R14: ffff88809e4b3000 R15: ffff88809f449538 [ 858.128205][ T7459] FS: 00007fe6a3f45700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 858.137113][ T7459] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 858.143718][ T7459] CR2: 00000000004ccd10 CR3: 000000009b31a000 CR4: 00000000001406f0 [ 858.151711][ T7459] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 858.159680][ T7459] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 858.167627][ T7459] Call Trace: [ 858.171021][ T7459] ip6gre_init_net+0x546/0x610 [ 858.175794][ T7459] ? ip6gre_tunnel_uninit+0x420/0x420 [ 858.181156][ T7459] ops_init+0xaf/0x470 [ 858.185203][ T7459] setup_net+0x2d8/0x850 [ 858.189434][ T7459] ? ops_init+0x470/0x470 [ 858.193815][ T7459] ? trace_kmalloc+0xfd/0x130 [ 858.198476][ T7459] ? kmem_cache_alloc_trace+0x168/0x2d0 [ 858.204021][ T7459] copy_net_ns+0x2cf/0x5e0 [ 858.208474][ T7459] create_new_namespaces+0x3f6/0xb10 [ 858.213741][ T7459] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 858.219432][ T7459] ksys_unshare+0x36c/0x9a0 [ 858.223960][ T7459] ? __x64_sys_futex+0x378/0x4e0 [ 858.228886][ T7459] ? walk_process_tree+0x2c0/0x2c0 [ 858.234066][ T7459] ? lock_is_held_type+0xb0/0xe0 [ 858.238991][ T7459] ? lock_is_held_type+0xb0/0xe0 [ 858.243906][ T7459] ? do_syscall_64+0x1c/0xe0 [ 858.248606][ T7459] __x64_sys_unshare+0x2d/0x40 [ 858.253368][ T7459] do_syscall_64+0x60/0xe0 [ 858.257829][ T7459] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 858.263706][ T7459] RIP: 0033:0x4469b9 [ 858.267590][ T7459] Code: Bad RIP value. [ 858.271628][ T7459] RSP: 002b:00007fe6a3f44ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 [ 858.280019][ T7459] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 00000000004469b9 [ 858.287967][ T7459] RDX: 00000000004469b9 RSI: 00000000000f4240 RDI: 0000000040000000 [ 858.295920][ T7459] RBP: 00000000006dbc30 R08: 0000000000000000 R09: 0000000000000000 [ 858.303865][ T7459] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc3c [ 858.311809][ T7459] R13: 00007ffe10ca285f R14: 00007fe6a3f459c0 R15: 00000000006dbc30 [ 858.319755][ T7459] Modules linked in: [ 858.324079][ T7459] ---[ end trace 12bbcd8a0a2a7a73 ]--- [ 858.329547][ T7459] RIP: 0010:free_netdev+0x41/0x480 [ 858.334747][ T7459] Code: d2 be 2b 27 00 00 48 c7 c7 40 5c fd 88 e8 37 04 1d fb 48 8d bd 00 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f4 03 00 00 48 8b bd 00 04 00 00 e8 b9 6c 6a fb [ 858.354399][ T7459] RSP: 0018:ffffc90002a27c10 EFLAGS: 00010202 [ 858.360488][ T7459] RAX: dffffc0000000000 RBX: ffff8880a224a000 RCX: ffffffff86f886ab [ 858.368506][ T7459] RDX: 0000000000000080 RSI: ffffffff89bc1100 RDI: 0000000000000400 [ 858.377354][ T7459] RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88809e9ae023 [ 858.385518][ T7459] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff4 [ 858.393584][ T7459] R13: ffff88808604d410 R14: ffff88809e4b3000 R15: ffff88809f449538 [ 858.401566][ T7459] FS: 00007fe6a3f45700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 858.410547][ T7459] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 858.417633][ T7459] CR2: 00000000004ccd10 CR3: 000000009b31a000 CR4: 00000000001406f0 [ 858.433303][ T7459] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 858.441271][ T7459] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 858.451984][ T7459] Kernel panic - not syncing: Fatal exception [ 858.459227][ T7459] Kernel Offset: disabled [ 858.463538][ T7459] Rebooting in 86400 seconds..