[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 53.620004][ T25] audit: type=1800 audit(1579600440.100:25): pid=8515 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 53.651787][ T25] audit: type=1800 audit(1579600440.100:26): pid=8515 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 53.687675][ T25] audit: type=1800 audit(1579600440.110:27): pid=8515 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 '10.128.0.74' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 62.430911][ T8667] IPVS: ftp: loaded support on port[0] = 21 [ 62.564678][ C1] hrtimer: interrupt took 38128 ns [ 62.574998][ T8668] netlink: 'syz-executor997': attribute type 1 has an invalid length. [ 62.584375][ T8668] netlink: 'syz-executor997': attribute type 1 has an invalid length. [ 62.592813][ T8668] netlink: 'syz-executor997': attribute type 1 has an invalid length. [ 62.601922][ T8668] netlink: 'syz-executor997': attribute type 1 has an invalid length. [ 62.610290][ T8668] netlink: 'syz-executor997': attribute type 1 has an invalid length. [ 62.618600][ T8668] netlink: 'syz-executor997': attribute type 1 has an invalid length. [ 62.627122][ T8668] netlink: 'syz-executor997': attribute type 1 has an invalid length. [ 62.635471][ T8668] netlink: 'syz-executor997': attribute type 1 has an invalid length. [ 62.644102][ T8668] netlink: 'syz-executor997': attribute type 1 has an invalid length. [ 62.652513][ T8668] netlink: 'syz-executor997': attribute type 1 has an invalid length. executing program [ 62.751658][ T8669] BUG: unable to handle page fault for address: ffff887f9a27ffff [ 62.759388][ T8669] #PF: supervisor read access in kernel mode [ 62.765358][ T8669] #PF: error_code(0x0000) - not-present page [ 62.771310][ T8669] PGD 0 P4D 0 [ 62.774677][ T8669] Oops: 0000 [#1] PREEMPT SMP KASAN [ 62.779873][ T8669] CPU: 1 PID: 8669 Comm: syz-executor997 Not tainted 5.5.0-rc7-syzkaller #0 [ 62.788524][ T8669] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.798571][ T8669] RIP: 0010:netif_receive_generic_xdp+0x56c/0x11b0 [ 62.805058][ T8669] 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 [ 62.824672][ T8669] RSP: 0018:ffffc90000e77958 EFLAGS: 00010246 [ 62.830761][ T8669] RAX: 1ffff10ff344ffff RBX: ffff887f9a27ffff RCX: 0000000000000100 [ 62.838729][ T8669] RDX: ffff8880a3f24d30 RSI: 0000000000000000 RDI: ffffc90000e77a88 [ 62.846678][ T8669] RBP: ffffc90000e77a78 R08: ffffffff86527ef6 R09: ffffed101344e05d [ 62.854680][ T8669] R10: ffffed101344e05d R11: 0000000000000000 R12: ffff8880a3f24d88 [ 62.862627][ T8669] R13: ffff8880a3f24cc0 R14: ffff88809a270000 R15: dffffc0000000000 [ 62.870581][ T8669] FS: 0000000000fe5880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 [ 62.879510][ T8669] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.886065][ T8669] CR2: ffff887f9a27ffff CR3: 0000000095926000 CR4: 00000000001406e0 [ 62.894037][ T8669] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.901983][ T8669] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.909926][ T8669] Call Trace: [ 62.913201][ T8669] do_xdp_generic+0x39/0x110 [ 62.917767][ T8669] tun_get_user+0x1dfb/0x37b0 [ 62.922439][ T8669] ? rcu_lock_release+0x21/0x30 [ 62.927277][ T8669] tun_chr_write_iter+0xac/0x130 [ 62.932200][ T8669] do_iter_readv_writev+0x651/0x8e0 [ 62.937387][ T8669] do_iter_write+0x180/0x590 [ 62.942959][ T8669] ? import_iovec+0x122/0x2a0 [ 62.947616][ T8669] do_writev+0x239/0x490 [ 62.951844][ T8669] ? do_user_addr_fault+0x654/0xaf0 [ 62.957089][ T8669] ? check_preemption_disabled+0xb4/0x260 [ 62.962787][ T8669] ? debug_smp_processor_id+0x9/0x20 [ 62.968157][ T8669] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 62.973591][ T8669] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 62.979288][ T8669] ? do_syscall_64+0x1d/0x1c0 [ 62.983941][ T8669] __x64_sys_writev+0x7d/0x90 [ 62.988594][ T8669] do_syscall_64+0xf7/0x1c0 [ 62.993094][ T8669] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 62.998958][ T8669] RIP: 0033:0x446120 [ 63.002825][ T8669] Code: 05 48 3d 01 f0 ff ff 0f 83 7d cd fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d f1 4e 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 54 cd fb ff c3 48 83 ec 08 e8 ba 2b 00 00 [ 63.022505][ T8669] RSP: 002b:00007ffcdcd55f58 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 63.030890][ T8669] RAX: ffffffffffffffda RBX: 00007ffcdcd55f70 RCX: 0000000000446120 [ 63.038854][ T8669] RDX: 0000000000000001 RSI: 00007ffcdcd55fa0 RDI: 00000000000000f0 [ 63.046806][ T8669] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000004 [ 63.054748][ T8669] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000f3f0 [ 63.062779][ T8669] R13: 0000000000403390 R14: 0000000000000000 R15: 0000000000000000 [ 63.070741][ T8669] Modules linked in: [ 63.074614][ T8669] CR2: ffff887f9a27ffff [ 63.078748][ T8669] ---[ end trace 42f322d172661e7c ]--- [ 63.084184][ T8669] RIP: 0010:netif_receive_generic_xdp+0x56c/0x11b0 [ 63.090659][ T8669] 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 [ 63.110246][ T8669] RSP: 0018:ffffc90000e77958 EFLAGS: 00010246 [ 63.116290][ T8669] RAX: 1ffff10ff344ffff RBX: ffff887f9a27ffff RCX: 0000000000000100 [ 63.124338][ T8669] RDX: ffff8880a3f24d30 RSI: 0000000000000000 RDI: ffffc90000e77a88 [ 63.132294][ T8669] RBP: ffffc90000e77a78 R08: ffffffff86527ef6 R09: ffffed101344e05d [ 63.140247][ T8669] R10: ffffed101344e05d R11: 0000000000000000 R12: ffff8880a3f24d88 [ 63.148198][ T8669] R13: ffff8880a3f24cc0 R14: ffff88809a270000 R15: dffffc0000000000 [ 63.156146][ T8669] FS: 0000000000fe5880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 [ 63.165046][ T8669] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.171616][ T8669] CR2: ffff887f9a27ffff CR3: 0000000095926000 CR4: 00000000001406e0 [ 63.179606][ T8669] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.187696][ T8669] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.195659][ T8669] Kernel panic - not syncing: Fatal exception in interrupt [ 63.203893][ T8669] Kernel Offset: disabled [ 63.208212][ T8669] Rebooting in 86400 seconds..