[ 73.588997][ T28] audit: type=1800 audit(1580175270.707:26): pid=9822 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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. [ 74.627732][ T28] kauditd_printk_skb: 2 callbacks suppressed [ 74.627744][ T28] audit: type=1800 audit(1580175271.767:29): pid=9822 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 74.654897][ T28] audit: type=1800 audit(1580175271.777:30): pid=9822 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.246' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 85.354531][ T9975] IPVS: ftp: loaded support on port[0] = 21 [ 85.402081][ T9975] BUG: unable to handle page fault for address: ffff887fa26d07ff [ 85.409818][ T9975] #PF: supervisor read access in kernel mode [ 85.415815][ T9975] #PF: error_code(0x0000) - not-present page [ 85.422416][ T9975] PGD 0 P4D 0 [ 85.425782][ T9975] Oops: 0000 [#1] PREEMPT SMP KASAN [ 85.431000][ T9975] CPU: 1 PID: 9975 Comm: syz-executor168 Not tainted 5.5.0-rc7-syzkaller #0 [ 85.439653][ T9975] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.449713][ T9975] RIP: 0010:do_xdp_generic.part.0+0x479/0x1790 [ 85.455849][ T9975] 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 9e 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 [ 85.475646][ T9975] RSP: 0018:ffffc90002737770 EFLAGS: 00010246 [ 85.481703][ T9975] RAX: dffffc0000000000 RBX: ffff8880a26c0800 RCX: ffffffff0000feff [ 85.489662][ T9975] RDX: 1ffff10ff44da0ff RSI: ffff88808f7d2230 RDI: 0000000000000005 [ 85.497681][ T9975] RBP: ffffc900027378b0 R08: ffff88808cc600c0 R09: ffffed10144d815d [ 85.505641][ T9975] R10: ffffed10144d815c R11: ffff8880a26c0ae3 R12: ffff887fa26d07ff [ 85.513720][ T9975] R13: 0000000000000100 R14: ffff8880a26d07ff R15: ffff88808f7d21c0 [ 85.522044][ T9975] FS: 0000000000ba0880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 85.531002][ T9975] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.537703][ T9975] CR2: ffff887fa26d07ff CR3: 000000008c6ff000 CR4: 00000000001406e0 [ 85.545703][ T9975] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 85.553669][ T9975] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 85.561642][ T9975] Call Trace: [ 85.564943][ T9975] ? generic_xdp_tx+0x740/0x740 [ 85.569783][ T9975] ? rcu_read_lock_held+0x9c/0xb0 [ 85.574814][ T9975] do_xdp_generic+0x30/0x50 [ 85.579313][ T9975] tun_get_user+0x2bcd/0x4020 [ 85.583972][ T9975] ? __kasan_check_read+0x11/0x20 [ 85.589023][ T9975] ? aa_file_perm+0x617/0x1600 [ 85.594381][ T9975] ? tun_build_skb.isra.0+0x1470/0x1470 [ 85.599953][ T9975] ? rcu_read_lock_held+0x9c/0xb0 [ 85.604967][ T9975] ? __kasan_check_read+0x11/0x20 [ 85.610147][ T9975] tun_chr_write_iter+0xbd/0x156 [ 85.615092][ T9975] do_iter_readv_writev+0x5f8/0x8f0 [ 85.620398][ T9975] ? no_seek_end_llseek_size+0x70/0x70 [ 85.625853][ T9975] ? apparmor_file_permission+0x27/0x30 [ 85.631386][ T9975] ? rw_verify_area+0x126/0x360 [ 85.636309][ T9975] do_iter_write+0x184/0x610 [ 85.641113][ T9975] ? dup_iter+0x260/0x260 [ 85.645439][ T9975] ? sendmsg_copy_msghdr+0x70/0x70 [ 85.650534][ T9975] vfs_writev+0x1b3/0x2f0 [ 85.654854][ T9975] ? vfs_iter_write+0xb0/0xb0 [ 85.659516][ T9975] ? __do_sys_bpf+0x751/0x3810 [ 85.664275][ T9975] ? __fget_light+0x1a9/0x230 [ 85.668936][ T9975] ? __fdget+0x1b/0x20 [ 85.673033][ T9975] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 85.679505][ T9975] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.685887][ T9975] ? __fget_light+0x1a9/0x230 [ 85.690553][ T9975] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.696782][ T9975] do_writev+0x15b/0x330 [ 85.701026][ T9975] ? vfs_writev+0x2f0/0x2f0 [ 85.705568][ T9975] ? do_syscall_64+0x26/0x790 [ 85.710235][ T9975] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.716528][ T9975] ? do_syscall_64+0x26/0x790 [ 85.721308][ T9975] __x64_sys_writev+0x75/0xb0 [ 85.726116][ T9975] do_syscall_64+0xfa/0x790 [ 85.730609][ T9975] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.736490][ T9975] RIP: 0033:0x441920 [ 85.740371][ T9975] Code: 05 48 3d 01 f0 ff ff 0f 83 fd 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d f1 96 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 d4 0e fc ff c3 48 83 ec 08 e8 7a 2b 00 00 [ 85.760107][ T9975] RSP: 002b:00007fff0d11cab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 85.768555][ T9975] RAX: ffffffffffffffda RBX: 00007fff0d11cad0 RCX: 0000000000441920 [ 85.776538][ T9975] RDX: 0000000000000001 RSI: 00007fff0d11cb00 RDI: 00000000000000f0 [ 85.784506][ T9975] RBP: 00007fff0d11cac0 R08: 0000000000000000 R09: 00000000bb1414ac [ 85.792479][ T9975] R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000000003 [ 85.800488][ T9975] R13: 00007fff0d11cac8 R14: 0000000000000000 R15: 0000000000000000 [ 85.808459][ T9975] Modules linked in: [ 85.812340][ T9975] CR2: ffff887fa26d07ff [ 85.816593][ T9975] ---[ end trace 6387c2ea3e1edde5 ]--- [ 85.822065][ T9975] RIP: 0010:do_xdp_generic.part.0+0x479/0x1790 [ 85.828207][ T9975] 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 9e 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 [ 85.847807][ T9975] RSP: 0018:ffffc90002737770 EFLAGS: 00010246 [ 85.854011][ T9975] RAX: dffffc0000000000 RBX: ffff8880a26c0800 RCX: ffffffff0000feff [ 85.862008][ T9975] RDX: 1ffff10ff44da0ff RSI: ffff88808f7d2230 RDI: 0000000000000005 [ 85.869969][ T9975] RBP: ffffc900027378b0 R08: ffff88808cc600c0 R09: ffffed10144d815d [ 85.877981][ T9975] R10: ffffed10144d815c R11: ffff8880a26c0ae3 R12: ffff887fa26d07ff [ 85.885949][ T9975] R13: 0000000000000100 R14: ffff8880a26d07ff R15: ffff88808f7d21c0 [ 85.893933][ T9975] FS: 0000000000ba0880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 85.902847][ T9975] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.909430][ T9975] CR2: ffff887fa26d07ff CR3: 000000008c6ff000 CR4: 00000000001406e0 [ 85.917529][ T9975] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 85.925490][ T9975] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 85.933457][ T9975] Kernel panic - not syncing: Fatal exception in interrupt [ 85.942348][ T9975] Kernel Offset: disabled [ 85.946676][ T9975] Rebooting in 86400 seconds..