[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 73.134303][ T27] audit: type=1800 audit(1581105076.327:25): pid=9727 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 73.154228][ T27] audit: type=1800 audit(1581105076.337:26): pid=9727 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 73.191186][ T27] audit: type=1800 audit(1581105076.337:27): pid=9727 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.27' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 84.148280][ T9880] IPVS: ftp: loaded support on port[0] = 21 [ 84.204305][ T9882] BUG: unable to handle page fault for address: ffff887fa3f607ff [ 84.212051][ T9882] #PF: supervisor read access in kernel mode [ 84.218013][ T9882] #PF: error_code(0x0000) - not-present page [ 84.224009][ T9882] PGD 0 P4D 0 [ 84.227367][ T9882] Oops: 0000 [#1] PREEMPT SMP KASAN [ 84.232675][ T9882] CPU: 1 PID: 9882 Comm: syz-executor615 Not tainted 5.5.0-syzkaller #0 [ 84.240984][ T9882] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 84.251093][ T9882] RIP: 0010:do_xdp_generic.part.0+0x479/0x17a0 [ 84.257252][ T9882] Code: 03 48 89 85 f0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 a5 78 ff ff ff 80 3c 02 00 48 89 8d c8 fe ff ff 0f 85 ac 10 00 00 <49> 8b 04 24 49 8d 7c 24 0c 48 ba 00 00 00 00 00 fc ff df 48 89 85 [ 84.277097][ T9882] RSP: 0018:ffffc90000e77770 EFLAGS: 00010246 [ 84.283230][ T9882] RAX: dffffc0000000000 RBX: ffff8880a3f50800 RCX: ffffffff0000feff [ 84.291180][ T9882] RDX: 1ffff10ff47ec0ff RSI: ffff888097ea78b0 RDI: 0000000000000005 [ 84.299132][ T9882] RBP: ffffc90000e778b0 R08: ffff8880a6d6e080 R09: ffffed10147ea15d [ 84.307081][ T9882] R10: ffffed10147ea15c R11: ffff8880a3f50ae3 R12: ffff887fa3f607ff [ 84.315031][ T9882] R13: 0000000000000100 R14: ffff8880a3f607ff R15: ffff888097ea7840 [ 84.322998][ T9882] FS: 0000000000df6880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 84.331913][ T9882] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 84.338483][ T9882] CR2: ffff887fa3f607ff CR3: 00000000a240b000 CR4: 00000000001406e0 [ 84.346448][ T9882] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 84.354398][ T9882] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 84.362361][ T9882] Call Trace: [ 84.365675][ T9882] ? generic_xdp_tx+0x740/0x740 [ 84.370536][ T9882] ? rcu_read_lock_held+0x9c/0xb0 [ 84.375544][ T9882] do_xdp_generic+0x30/0x50 [ 84.380030][ T9882] tun_get_user+0x2bcd/0x4020 [ 84.384689][ T9882] ? __kasan_check_read+0x11/0x20 [ 84.389707][ T9882] ? aa_file_perm+0x617/0x1600 [ 84.394468][ T9882] ? tun_build_skb.isra.0+0x1480/0x1480 [ 84.400005][ T9882] ? rcu_read_lock_held+0x9c/0xb0 [ 84.405161][ T9882] ? __kasan_check_read+0x11/0x20 [ 84.410195][ T9882] tun_chr_write_iter+0xbd/0x156 [ 84.415122][ T9882] do_iter_readv_writev+0x5f8/0x8f0 [ 84.420565][ T9882] ? no_seek_end_llseek_size+0x70/0x70 [ 84.426015][ T9882] ? apparmor_file_permission+0x27/0x30 [ 84.431556][ T9882] ? rw_verify_area+0x126/0x360 [ 84.436391][ T9882] do_iter_write+0x184/0x610 [ 84.441017][ T9882] ? dup_iter+0x260/0x260 [ 84.445347][ T9882] ? mark_lock+0xc2/0x1220 [ 84.449769][ T9882] vfs_writev+0x1b3/0x2f0 [ 84.454082][ T9882] ? vfs_iter_write+0xb0/0xb0 [ 84.458761][ T9882] ? lock_downgrade+0x920/0x920 [ 84.463604][ T9882] ? handle_mm_fault+0x292/0xa50 [ 84.468549][ T9882] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 84.474785][ T9882] ? __fget_light+0x1ad/0x270 [ 84.479446][ T9882] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 84.485670][ T9882] do_writev+0x15b/0x330 [ 84.489893][ T9882] ? vfs_writev+0x2f0/0x2f0 [ 84.494380][ T9882] ? do_syscall_64+0x26/0x790 [ 84.499111][ T9882] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 84.505225][ T9882] ? do_syscall_64+0x26/0x790 [ 84.509994][ T9882] __x64_sys_writev+0x75/0xb0 [ 84.514668][ T9882] do_syscall_64+0xfa/0x790 [ 84.519171][ T9882] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 84.525063][ T9882] RIP: 0033:0x4420c0 [ 84.528939][ T9882] Code: 05 48 3d 01 f0 ff ff 0f 83 5d 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 51 8f 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 34 09 fc ff c3 48 83 ec 08 e8 ba 2b 00 00 [ 84.548632][ T9882] RSP: 002b:00007ffdbefc3c98 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 84.557190][ T9882] RAX: ffffffffffffffda RBX: 00007ffdbefc3cb0 RCX: 00000000004420c0 [ 84.565159][ T9882] RDX: 0000000000000001 RSI: 00007ffdbefc3ce0 RDI: 00000000000000f0 [ 84.573117][ T9882] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000004 [ 84.581075][ T9882] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000148be [ 84.589027][ T9882] R13: 0000000000402f10 R14: 0000000000000000 R15: 0000000000000000 [ 84.597006][ T9882] Modules linked in: [ 84.600882][ T9882] CR2: ffff887fa3f607ff [ 84.605017][ T9882] ---[ end trace 8ad236f0c21dd59f ]--- [ 84.610459][ T9882] RIP: 0010:do_xdp_generic.part.0+0x479/0x17a0 [ 84.616592][ T9882] Code: 03 48 89 85 f0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 a5 78 ff ff ff 80 3c 02 00 48 89 8d c8 fe ff ff 0f 85 ac 10 00 00 <49> 8b 04 24 49 8d 7c 24 0c 48 ba 00 00 00 00 00 fc ff df 48 89 85 [ 84.636188][ T9882] RSP: 0018:ffffc90000e77770 EFLAGS: 00010246 [ 84.642233][ T9882] RAX: dffffc0000000000 RBX: ffff8880a3f50800 RCX: ffffffff0000feff [ 84.650206][ T9882] RDX: 1ffff10ff47ec0ff RSI: ffff888097ea78b0 RDI: 0000000000000005 [ 84.658184][ T9882] RBP: ffffc90000e778b0 R08: ffff8880a6d6e080 R09: ffffed10147ea15d [ 84.666141][ T9882] R10: ffffed10147ea15c R11: ffff8880a3f50ae3 R12: ffff887fa3f607ff [ 84.674104][ T9882] R13: 0000000000000100 R14: ffff8880a3f607ff R15: ffff888097ea7840 [ 84.682067][ T9882] FS: 0000000000df6880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 84.691139][ T9882] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 84.697715][ T9882] CR2: ffff887fa3f607ff CR3: 00000000a240b000 CR4: 00000000001406e0 [ 84.705754][ T9882] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 84.713713][ T9882] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 84.721671][ T9882] Kernel panic - not syncing: Fatal exception in interrupt [ 84.730477][ T9882] Kernel Offset: disabled [ 84.734815][ T9882] Rebooting in 86400 seconds..