[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 57.206304][ T26] audit: type=1800 audit(1570203389.932:25): pid=8544 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 57.247564][ T26] audit: type=1800 audit(1570203389.942:26): pid=8544 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 57.292976][ T26] audit: type=1800 audit(1570203389.942:27): pid=8544 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 '10.128.0.156' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 66.976071][ T8698] netlink: 'syz-executor786': attribute type 2 has an invalid length. [ 66.984460][ T8698] kasan: CONFIG_KASAN_INLINE enabled [ 66.990122][ T8698] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 66.998612][ T8698] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 67.005545][ T8698] CPU: 0 PID: 8698 Comm: syz-executor786 Not tainted 5.3.0+ #0 [ 67.013602][ T8698] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.023667][ T8698] RIP: 0010:dsmark_init+0x193/0x640 [ 67.028848][ T8698] Code: 85 db 58 0f 88 7d 03 00 00 e8 b9 81 ad fb 48 8b 9d 70 ff ff ff 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 ca [ 67.048959][ T8698] RSP: 0018:ffff88808b2673b8 EFLAGS: 00010247 [ 67.055010][ T8698] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85c58439 [ 67.062973][ T8698] RDX: 0000000000000000 RSI: ffffffff85c58447 RDI: 0000000000000004 [ 67.070924][ T8698] RBP: ffff88808b2674b0 R08: ffff8880a14641c0 R09: ffffed1015d06159 [ 67.078877][ T8698] R10: ffffed1015d06158 R11: ffff8880ae830ac7 R12: ffff8880a232c940 [ 67.087348][ T8698] R13: dffffc0000000000 R14: ffff88808b2678c0 R15: 0000000000000000 [ 67.095326][ T8698] FS: 00000000011a7880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 67.104413][ T8698] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.111250][ T8698] CR2: 0000000020000080 CR3: 000000009cc7b000 CR4: 00000000001406f0 [ 67.119300][ T8698] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.127258][ T8698] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.135211][ T8698] Call Trace: [ 67.138510][ T8698] ? dsmark_dump_class+0x680/0x680 [ 67.143613][ T8698] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.149841][ T8698] ? lockdep_rtnl_is_held+0x26/0x30 [ 67.155142][ T8698] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 67.161368][ T8698] ? dsmark_dump_class+0x680/0x680 [ 67.167020][ T8698] qdisc_create+0x4ee/0x1210 [ 67.171616][ T8698] ? tc_get_qdisc+0xc10/0xc10 [ 67.176274][ T8698] ? __nla_parse+0x43/0x60 [ 67.180676][ T8698] tc_modify_qdisc+0x524/0x1c50 [ 67.185531][ T8698] ? qdisc_create+0x1210/0x1210 [ 67.190406][ T8698] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 67.196678][ T8698] ? qdisc_create+0x1210/0x1210 [ 67.201609][ T8698] rtnetlink_rcv_msg+0x463/0xb00 [ 67.206533][ T8698] ? rtnl_bridge_getlink+0x910/0x910 [ 67.211936][ T8698] ? lock_downgrade+0x920/0x920 [ 67.217439][ T8698] ? netlink_deliver_tap+0x22d/0xbf0 [ 67.222742][ T8698] ? find_held_lock+0x35/0x130 [ 67.227501][ T8698] netlink_rcv_skb+0x177/0x450 [ 67.232257][ T8698] ? rtnl_bridge_getlink+0x910/0x910 [ 67.237532][ T8698] ? netlink_ack+0xb50/0xb50 [ 67.242104][ T8698] ? __kasan_check_read+0x11/0x20 [ 67.247107][ T8698] ? netlink_deliver_tap+0x254/0xbf0 [ 67.252500][ T8698] rtnetlink_rcv+0x1d/0x30 [ 67.256915][ T8698] netlink_unicast+0x531/0x710 [ 67.261673][ T8698] ? netlink_attachskb+0x7c0/0x7c0 [ 67.266790][ T8698] ? _copy_from_iter_full+0x25d/0x8c0 [ 67.272204][ T8698] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 67.277908][ T8698] ? __check_object_size+0x3d/0x437 [ 67.283275][ T8698] netlink_sendmsg+0x8a5/0xd60 [ 67.288054][ T8698] ? netlink_unicast+0x710/0x710 [ 67.293963][ T8698] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 67.299517][ T8698] ? apparmor_socket_sendmsg+0x2a/0x30 [ 67.305002][ T8698] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.311353][ T8698] ? security_socket_sendmsg+0x8d/0xc0 [ 67.316797][ T8698] ? netlink_unicast+0x710/0x710 [ 67.321883][ T8698] sock_sendmsg+0xd7/0x130 [ 67.326289][ T8698] ___sys_sendmsg+0x803/0x920 [ 67.330962][ T8698] ? copy_msghdr_from_user+0x440/0x440 [ 67.336493][ T8698] ? __might_fault+0x12b/0x1e0 [ 67.341524][ T8698] ? find_held_lock+0x35/0x130 [ 67.346274][ T8698] ? lock_downgrade+0x920/0x920 [ 67.351110][ T8698] ? __kasan_check_read+0x11/0x20 [ 67.356118][ T8698] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.362357][ T8698] ? __fget_light+0x1a9/0x230 [ 67.367016][ T8698] ? __fdget+0x1b/0x20 [ 67.371081][ T8698] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 67.377317][ T8698] __sys_sendmsg+0x105/0x1d0 [ 67.381892][ T8698] ? __sys_sendmsg_sock+0xd0/0xd0 [ 67.386902][ T8698] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 67.392341][ T8698] ? do_syscall_64+0x26/0x760 [ 67.397108][ T8698] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.403156][ T8698] ? do_syscall_64+0x26/0x760 [ 67.407830][ T8698] __x64_sys_sendmsg+0x78/0xb0 [ 67.412609][ T8698] do_syscall_64+0xfa/0x760 [ 67.417091][ T8698] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.423039][ T8698] RIP: 0033:0x440369 [ 67.427053][ T8698] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 67.446917][ T8698] RSP: 002b:00007ffca3a69158 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 67.455347][ T8698] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440369 [ 67.463314][ T8698] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 67.471298][ T8698] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 67.479254][ T8698] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401bf0 [ 67.487207][ T8698] R13: 0000000000401c80 R14: 0000000000000000 R15: 0000000000000000 [ 67.495163][ T8698] Modules linked in: [ 67.499755][ T8698] ---[ end trace 24e11afe2f7bf6cd ]--- [ 67.505252][ T8698] RIP: 0010:dsmark_init+0x193/0x640 [ 67.510695][ T8698] Code: 85 db 58 0f 88 7d 03 00 00 e8 b9 81 ad fb 48 8b 9d 70 ff ff ff 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 ca [ 67.530466][ T8698] RSP: 0018:ffff88808b2673b8 EFLAGS: 00010247 [ 67.536693][ T8698] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85c58439 [ 67.544699][ T8698] RDX: 0000000000000000 RSI: ffffffff85c58447 RDI: 0000000000000004 [ 67.552789][ T8698] RBP: ffff88808b2674b0 R08: ffff8880a14641c0 R09: ffffed1015d06159 [ 67.560813][ T8698] R10: ffffed1015d06158 R11: ffff8880ae830ac7 R12: ffff8880a232c940 [ 67.569513][ T8698] R13: dffffc0000000000 R14: ffff88808b2678c0 R15: 0000000000000000 [ 67.578041][ T8698] FS: 00000000011a7880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 67.586969][ T8698] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.593579][ T8698] CR2: 0000000020000080 CR3: 000000009cc7b000 CR4: 00000000001406f0 [ 67.601661][ T8698] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.609646][ T8698] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.617722][ T8698] Kernel panic - not syncing: Fatal exception [ 67.625404][ T8698] Kernel Offset: disabled [ 67.629746][ T8698] Rebooting in 86400 seconds..