[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 55.742887][ T27] audit: type=1800 audit(1579635983.435:25): pid=8504 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 55.767498][ T27] audit: type=1800 audit(1579635983.435:26): pid=8504 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 55.824041][ T27] audit: type=1800 audit(1579635983.445:27): pid=8504 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.0.242' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 67.461152][ T8655] IPVS: ftp: loaded support on port[0] = 21 [ 67.500753][ T8655] netlink: 'syz-executor109': attribute type 1 has an invalid length. [ 67.509230][ T8655] netlink: 'syz-executor109': attribute type 1 has an invalid length. [ 67.517375][ T8655] netlink: 'syz-executor109': attribute type 1 has an invalid length. [ 67.525961][ T8655] netlink: 'syz-executor109': attribute type 1 has an invalid length. [ 67.534215][ T8655] netlink: 'syz-executor109': attribute type 1 has an invalid length. [ 67.542528][ T8655] netlink: 'syz-executor109': attribute type 1 has an invalid length. [ 67.550802][ T8655] netlink: 'syz-executor109': attribute type 1 has an invalid length. [ 67.559121][ T8655] netlink: 'syz-executor109': attribute type 1 has an invalid length. [ 67.567269][ T8655] netlink: 'syz-executor109': attribute type 1 has an invalid length. [ 67.575932][ T8655] netlink: 'syz-executor109': attribute type 1 has an invalid length. [ 67.584568][ T8655] BUG: unable to handle page fault for address: ffff887f9a3f4fff [ 67.592287][ T8655] #PF: supervisor read access in kernel mode [ 67.598257][ T8655] #PF: error_code(0x0000) - not-present page [ 67.604217][ T8655] PGD 0 P4D 0 [ 67.607576][ T8655] Oops: 0000 [#1] PREEMPT SMP KASAN [ 67.612770][ T8655] CPU: 0 PID: 8655 Comm: syz-executor109 Not tainted 5.5.0-rc7-syzkaller #0 [ 67.621423][ T8655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.631476][ T8655] RIP: 0010:netif_receive_generic_xdp+0x56c/0x11b0 [ 67.637984][ T8655] Code: 74 08 48 89 df e8 04 41 60 fb 4c 89 33 48 8b 9d 60 ff ff ff 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 44 40 60 fb <48> 8b 33 83 e6 01 31 ff 48 89 b5 f0 fe ff ff e8 80 00 24 fb 48 89 [ 67.657651][ T8655] RSP: 0018:ffffc90001d47958 EFLAGS: 00010246 [ 67.663687][ T8655] RAX: 1ffff10ff347e9ff RBX: ffff887f9a3f4fff RCX: 0000000000000100 [ 67.671629][ T8655] RDX: ffff8880a45624b0 RSI: 0000000000000000 RDI: ffffc90001d47a88 [ 67.679574][ T8655] RBP: ffffc90001d47a78 R08: ffffffff86527ef6 R09: ffffed101347ca5d [ 67.687517][ T8655] R10: ffffed101347ca5d R11: 0000000000000000 R12: ffff8880a4562508 [ 67.695469][ T8655] R13: ffff8880a4562440 R14: ffff88809a3e5000 R15: dffffc0000000000 [ 67.703415][ T8655] FS: 00000000008a1880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 67.712448][ T8655] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.719029][ T8655] CR2: ffff887f9a3f4fff CR3: 000000009fdf2000 CR4: 00000000001406f0 [ 67.726996][ T8655] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.734959][ T8655] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.742967][ T8655] Call Trace: [ 67.746270][ T8655] do_xdp_generic+0x39/0x110 [ 67.750848][ T8655] tun_get_user+0x1dfb/0x37b0 [ 67.755529][ T8655] ? rcu_lock_release+0x21/0x30 [ 67.760359][ T8655] tun_chr_write_iter+0xac/0x130 [ 67.765278][ T8655] do_iter_readv_writev+0x651/0x8e0 [ 67.770476][ T8655] do_iter_write+0x180/0x590 [ 67.775046][ T8655] ? import_iovec+0x122/0x2a0 [ 67.779815][ T8655] do_writev+0x239/0x490 [ 67.784071][ T8655] ? switch_fpu_return+0xe/0x10 [ 67.788901][ T8655] ? prepare_exit_to_usermode+0x221/0x5b0 [ 67.794594][ T8655] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 67.800301][ T8655] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 67.805847][ T8655] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 67.811816][ T8655] ? do_syscall_64+0x1d/0x1c0 [ 67.816472][ T8655] __x64_sys_writev+0x7d/0x90 [ 67.821136][ T8655] do_syscall_64+0xf7/0x1c0 [ 67.825621][ T8655] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.831484][ T8655] RIP: 0033:0x4458a0 [ 67.835350][ T8655] Code: 05 48 3d 01 f0 ff ff 0f 83 1d d3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 91 57 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 f4 d2 fb ff c3 48 83 ec 08 e8 7a 2b 00 00 [ 67.854932][ T8655] RSP: 002b:00007ffe4637c548 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 67.863331][ T8655] RAX: ffffffffffffffda RBX: 00007ffe4637c560 RCX: 00000000004458a0 [ 67.871296][ T8655] RDX: 0000000000000001 RSI: 00007ffe4637c590 RDI: 00000000000000f0 [ 67.879246][ T8655] RBP: 00007ffe4637c550 R08: 0000000000000000 R09: 00000000bb1414ac [ 67.887292][ T8655] R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000000003 [ 67.895256][ T8655] R13: 00007ffe4637c558 R14: 0000000000000000 R15: 0000000000000000 [ 67.903217][ T8655] Modules linked in: [ 67.907099][ T8655] CR2: ffff887f9a3f4fff [ 67.911235][ T8655] ---[ end trace fee8c9a09fd2af25 ]--- [ 67.916685][ T8655] RIP: 0010:netif_receive_generic_xdp+0x56c/0x11b0 [ 67.923221][ T8655] Code: 74 08 48 89 df e8 04 41 60 fb 4c 89 33 48 8b 9d 60 ff ff ff 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 44 40 60 fb <48> 8b 33 83 e6 01 31 ff 48 89 b5 f0 fe ff ff e8 80 00 24 fb 48 89 [ 67.942935][ T8655] RSP: 0018:ffffc90001d47958 EFLAGS: 00010246 [ 67.949045][ T8655] RAX: 1ffff10ff347e9ff RBX: ffff887f9a3f4fff RCX: 0000000000000100 [ 67.956998][ T8655] RDX: ffff8880a45624b0 RSI: 0000000000000000 RDI: ffffc90001d47a88 [ 67.964989][ T8655] RBP: ffffc90001d47a78 R08: ffffffff86527ef6 R09: ffffed101347ca5d [ 67.972941][ T8655] R10: ffffed101347ca5d R11: 0000000000000000 R12: ffff8880a4562508 [ 67.981032][ T8655] R13: ffff8880a4562440 R14: ffff88809a3e5000 R15: dffffc0000000000 [ 67.988994][ T8655] FS: 00000000008a1880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 67.998010][ T8655] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.004627][ T8655] CR2: ffff887f9a3f4fff CR3: 000000009fdf2000 CR4: 00000000001406f0 [ 68.012596][ T8655] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.021179][ T8655] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.029138][ T8655] Kernel panic - not syncing: Fatal exception in interrupt [ 68.037683][ T8655] Kernel Offset: disabled [ 68.042017][ T8655] Rebooting in 86400 seconds..