Starting OpenBSD Secure Shell server... Starting System Logging Service... [ OK ] Started Regular background program processing daemon. Starting Permit User Sessions... Starting getty on tty2-tty6 if dbus and logind are not available... [ OK ] Started System Logging Service. [ OK ] Started Permit User Sessions. [ OK ] Found device /dev/ttyS0. [ 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 '10.128.0.68' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 68.830070][ T27] audit: type=1400 audit(1588638657.831:8): avc: denied { execmem } for pid=7051 comm="syz-executor537" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 68.859950][ T7052] IPVS: ftp: loaded support on port[0] = 21 [ 68.954812][ T7076] BUG: unable to handle page fault for address: ffff887f87dfffff [ 68.962596][ T7076] #PF: supervisor read access in kernel mode [ 68.968547][ T7076] #PF: error_code(0x0000) - not-present page [ 68.974540][ T7076] PGD 0 P4D 0 [ 68.977906][ T7076] Oops: 0000 [#1] PREEMPT SMP KASAN [ 68.983077][ T7076] CPU: 0 PID: 7076 Comm: syz-executor537 Not tainted 5.7.0-rc4-syzkaller #0 [ 68.991717][ T7076] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.001788][ T7076] RIP: 0010:do_xdp_generic.part.0+0x45f/0x1780 [ 69.007913][ T7076] Code: 4c 89 f8 4c 29 f0 4c 89 ac 24 b0 00 00 00 48 89 84 24 b8 00 00 00 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 bd 10 00 00 <49> 8b 45 00 49 8d 7d 0c 48 ba 00 00 00 00 00 fc ff df 48 89 44 24 [ 69.027510][ T7076] RSP: 0018:ffffc90001867648 EFLAGS: 00010246 [ 69.033564][ T7076] RAX: dffffc0000000000 RBX: ffff888087dfffff RCX: 00000000ffff0101 [ 69.041515][ T7076] RDX: 1ffff10ff0fbffff RSI: ffffffff8621a610 RDI: 0000000000000005 [ 69.049484][ T7076] RBP: ffff88809140b1c0 R08: ffff88808a3701c0 R09: ffffed1010fbe7dd [ 69.057462][ T7076] R10: ffff888087df3ee3 R11: ffffed1010fbe7dc R12: ffffc90000e8e000 [ 69.065453][ T7076] R13: ffff887f87dfffff R14: 0000000000000100 R15: ffff888087df0100 [ 69.073409][ T7076] FS: 00007effe1b7b700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 69.082431][ T7076] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.089107][ T7076] CR2: ffff887f87dfffff CR3: 000000009cb90000 CR4: 00000000001406f0 [ 69.097057][ T7076] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.105022][ T7076] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.112993][ T7076] Call Trace: [ 69.116283][ T7076] ? tun_get_user+0x2896/0x3c70 [ 69.121125][ T7076] ? generic_xdp_tx+0x710/0x710 [ 69.125966][ T7076] ? rcu_read_lock_held+0x9c/0xb0 [ 69.130973][ T7076] do_xdp_generic+0x2b/0x40 [ 69.135544][ T7076] tun_get_user+0x2993/0x3c70 [ 69.140224][ T7076] ? tun_build_skb.isra.0+0x13e0/0x13e0 [ 69.145772][ T7076] ? tun_get+0x16d/0x290 [ 69.149996][ T7076] ? rcu_read_lock_held_common+0x130/0x130 [ 69.155785][ T7076] tun_chr_write_iter+0xba/0x151 [ 69.160751][ T7076] new_sync_write+0x4a2/0x700 [ 69.165401][ T7076] ? new_sync_read+0x7a0/0x7a0 [ 69.170205][ T7076] ? pipe_lock+0x5a/0x70 [ 69.174564][ T7076] ? lock_release+0x800/0x800 [ 69.179219][ T7076] __vfs_write+0xc9/0x100 [ 69.183525][ T7076] __kernel_write+0x11c/0x3a0 [ 69.188192][ T7076] write_pipe_buf+0x153/0x1e0 [ 69.192845][ T7076] ? do_splice_direct+0x280/0x280 [ 69.197842][ T7076] ? splice_from_pipe_next.part.0+0x29c/0x350 [ 69.203882][ T7076] __splice_from_pipe+0x3e6/0x7b0 [ 69.208882][ T7076] ? do_splice_direct+0x280/0x280 [ 69.213880][ T7076] ? do_splice_direct+0x280/0x280 [ 69.218896][ T7076] splice_from_pipe+0xd9/0x140 [ 69.223633][ T7076] ? splice_shrink_spd+0xc0/0xc0 [ 69.228558][ T7076] ? security_file_permission+0x8c/0x470 [ 69.234163][ T7076] default_file_splice_write+0x37/0x90 [ 69.239596][ T7076] ? generic_splice_sendpage+0x40/0x40 [ 69.245026][ T7076] do_splice+0xb2e/0x1550 [ 69.249331][ T7076] ? __fget_files+0x32f/0x500 [ 69.253994][ T7076] ? ksys_dup3+0x3c0/0x3c0 [ 69.258412][ T7076] ? default_file_splice_write+0x90/0x90 [ 69.264024][ T7076] __x64_sys_splice+0x2c1/0x330 [ 69.268854][ T7076] do_syscall_64+0xf6/0x7d0 [ 69.273333][ T7076] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 69.279204][ T7076] RIP: 0033:0x4464c9 [ 69.283073][ T7076] Code: e8 1c ba 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 ab 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 69.302667][ T7076] RSP: 002b:00007effe1b7ad98 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 69.311054][ T7076] RAX: ffffffffffffffda RBX: 00000000006dbc78 RCX: 00000000004464c9 [ 69.319017][ T7076] RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003 [ 69.326978][ T7076] RBP: 00000000006dbc70 R08: 0000000000010008 R09: 0000000000000000 [ 69.334942][ T7076] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc7c [ 69.342890][ T7076] R13: 0000000000003172 R14: 656c6c616b7a7973 R15: 0000000000000064 [ 69.350860][ T7076] Modules linked in: [ 69.354741][ T7076] CR2: ffff887f87dfffff [ 69.358872][ T7076] ---[ end trace 0611c69468c3b7e8 ]--- [ 69.364310][ T7076] RIP: 0010:do_xdp_generic.part.0+0x45f/0x1780 [ 69.370527][ T7076] Code: 4c 89 f8 4c 29 f0 4c 89 ac 24 b0 00 00 00 48 89 84 24 b8 00 00 00 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 bd 10 00 00 <49> 8b 45 00 49 8d 7d 0c 48 ba 00 00 00 00 00 fc ff df 48 89 44 24 [ 69.390211][ T7076] RSP: 0018:ffffc90001867648 EFLAGS: 00010246 [ 69.396281][ T7076] RAX: dffffc0000000000 RBX: ffff888087dfffff RCX: 00000000ffff0101 [ 69.404231][ T7076] RDX: 1ffff10ff0fbffff RSI: ffffffff8621a610 RDI: 0000000000000005 [ 69.412188][ T7076] RBP: ffff88809140b1c0 R08: ffff88808a3701c0 R09: ffffed1010fbe7dd [ 69.420144][ T7076] R10: ffff888087df3ee3 R11: ffffed1010fbe7dc R12: ffffc90000e8e000 [ 69.428106][ T7076] R13: ffff887f87dfffff R14: 0000000000000100 R15: ffff888087df0100 [ 69.436075][ T7076] FS: 00007effe1b7b700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 69.444981][ T7076] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.451549][ T7076] CR2: ffff887f87dfffff CR3: 000000009cb90000 CR4: 00000000001406f0 [ 69.459502][ T7076] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.467480][ T7076] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.475444][ T7076] Kernel panic - not syncing: Fatal exception in interrupt [ 69.483684][ T7076] Kernel Offset: disabled [ 69.488006][ T7076] Rebooting in 86400 seconds..