Starting OpenBSD Secure Shell server... [ OK ] Started Regular background program processing daemon. Starting Permit User Sessions... [ OK ] Started Daily apt download activities. [ OK ] Started Daily apt upgrade and clean activities. [ OK ] Reached target Timers. [ OK ] Started System Logging Service. [ OK ] Started Permit User Sessions. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started OpenBSD Secure Shell server. [ 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 tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty2. [ 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 '10.128.0.123' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 56.797833][ T7011] IPVS: ftp: loaded support on port[0] = 21 [ 56.890736][ T7035] BUG: unable to handle page fault for address: ffff887f963a7fff [ 56.898502][ T7035] #PF: supervisor read access in kernel mode [ 56.904577][ T7035] #PF: error_code(0x0000) - not-present page [ 56.910544][ T7035] PGD 0 P4D 0 [ 56.915263][ T7035] Oops: 0000 [#1] PREEMPT SMP KASAN [ 56.920461][ T7035] CPU: 0 PID: 7035 Comm: syz-executor757 Not tainted 5.6.0-syzkaller #0 [ 56.928772][ T7035] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.938820][ T7035] RIP: 0010:do_xdp_generic.part.0+0x45f/0x1780 [ 56.944955][ T7035] 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 [ 56.964573][ T7035] RSP: 0018:ffffc90002a5f648 EFLAGS: 00010246 [ 56.970625][ T7035] RAX: dffffc0000000000 RBX: ffff8880963a7fff RCX: 00000000ffff0101 [ 56.978608][ T7035] RDX: 1ffff10ff2c74fff RSI: ffffffff861b3610 RDI: 0000000000000005 [ 56.986578][ T7035] RBP: ffff88809f6a1180 R08: ffff88808b3be200 R09: ffffed1012c737dd [ 56.994589][ T7035] R10: ffff88809639bee3 R11: ffffed1012c737dc R12: ffffc9000103e000 [ 57.002544][ T7035] R13: ffff887f963a7fff R14: 0000000000000100 R15: ffff888096398100 [ 57.010518][ T7035] FS: 00007fd22d0a7700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 57.019428][ T7035] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.025999][ T7035] CR2: ffff887f963a7fff CR3: 000000009d577000 CR4: 00000000001406f0 [ 57.033969][ T7035] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 57.041938][ T7035] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 57.049898][ T7035] Call Trace: [ 57.053339][ T7035] ? tun_get_user+0x281a/0x3be0 [ 57.059352][ T7035] ? generic_xdp_tx+0x710/0x710 [ 57.064207][ T7035] ? rcu_read_lock_held+0x9c/0xb0 [ 57.069241][ T7035] do_xdp_generic+0x2b/0x40 [ 57.073747][ T7035] tun_get_user+0x2917/0x3be0 [ 57.078424][ T7035] ? tun_build_skb.isra.0+0x13e0/0x13e0 [ 57.084028][ T7035] ? tun_get+0x16d/0x290 [ 57.088486][ T7035] ? rcu_read_lock_held_common+0x130/0x130 [ 57.094286][ T7035] tun_chr_write_iter+0xba/0x151 [ 57.099227][ T7035] new_sync_write+0x4a2/0x700 [ 57.103889][ T7035] ? new_sync_read+0x7a0/0x7a0 [ 57.108631][ T7035] ? pipe_lock+0x5a/0x70 [ 57.112853][ T7035] ? lock_release+0x800/0x800 [ 57.117514][ T7035] __vfs_write+0xc9/0x100 [ 57.121832][ T7035] __kernel_write+0x11c/0x3a0 [ 57.126931][ T7035] write_pipe_buf+0x153/0x1e0 [ 57.131600][ T7035] ? do_splice_direct+0x280/0x280 [ 57.136602][ T7035] ? splice_from_pipe_next.part.0+0x29c/0x350 [ 57.142651][ T7035] __splice_from_pipe+0x3e6/0x7b0 [ 57.147666][ T7035] ? do_splice_direct+0x280/0x280 [ 57.152677][ T7035] ? do_splice_direct+0x280/0x280 [ 57.157699][ T7035] splice_from_pipe+0xd9/0x140 [ 57.162442][ T7035] ? splice_shrink_spd+0xc0/0xc0 [ 57.167362][ T7035] ? security_file_permission+0x8c/0x470 [ 57.172972][ T7035] default_file_splice_write+0x37/0x90 [ 57.178521][ T7035] ? generic_splice_sendpage+0x40/0x40 [ 57.183972][ T7035] do_splice+0xb2e/0x1550 [ 57.188284][ T7035] ? __fget_files+0x32f/0x500 [ 57.192935][ T7035] ? ksys_dup3+0x3c0/0x3c0 [ 57.197326][ T7035] ? default_file_splice_write+0x90/0x90 [ 57.202940][ T7035] __x64_sys_splice+0x2c1/0x330 [ 57.207775][ T7035] do_syscall_64+0xf6/0x7d0 [ 57.212258][ T7035] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 57.218135][ T7035] RIP: 0033:0x446479 [ 57.222021][ T7035] 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 [ 57.241611][ T7035] RSP: 002b:00007fd22d0a6d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 57.250008][ T7035] RAX: ffffffffffffffda RBX: 00000000006dbc78 RCX: 0000000000446479 [ 57.258093][ T7035] RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003 [ 57.266061][ T7035] RBP: 00000000006dbc70 R08: 0000000000010008 R09: 0000000000000000 [ 57.274531][ T7035] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc7c [ 57.282478][ T7035] R13: 0000000000003172 R14: 656c6c616b7a7973 R15: 0000000000000064 [ 57.290476][ T7035] Modules linked in: [ 57.294357][ T7035] CR2: ffff887f963a7fff [ 57.298490][ T7035] ---[ end trace 8a93e7140a526bc8 ]--- [ 57.304458][ T7035] RIP: 0010:do_xdp_generic.part.0+0x45f/0x1780 [ 57.310588][ T7035] 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 [ 57.330841][ T7035] RSP: 0018:ffffc90002a5f648 EFLAGS: 00010246 [ 57.336885][ T7035] RAX: dffffc0000000000 RBX: ffff8880963a7fff RCX: 00000000ffff0101 [ 57.344836][ T7035] RDX: 1ffff10ff2c74fff RSI: ffffffff861b3610 RDI: 0000000000000005 [ 57.352795][ T7035] RBP: ffff88809f6a1180 R08: ffff88808b3be200 R09: ffffed1012c737dd [ 57.362196][ T7035] R10: ffff88809639bee3 R11: ffffed1012c737dc R12: ffffc9000103e000 [ 57.370321][ T7035] R13: ffff887f963a7fff R14: 0000000000000100 R15: ffff888096398100 [ 57.378352][ T7035] FS: 00007fd22d0a7700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 57.387273][ T7035] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.394706][ T7035] CR2: ffff887f963a7fff CR3: 000000009d577000 CR4: 00000000001406f0 [ 57.402661][ T7035] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 57.410621][ T7035] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 57.418577][ T7035] Kernel panic - not syncing: Fatal exception in interrupt [ 57.427011][ T7035] Kernel Offset: disabled [ 57.431346][ T7035] Rebooting in 86400 seconds..