[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 61.093891][ T26] audit: type=1800 audit(1563575636.472:25): pid=8720 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 61.129733][ T26] audit: type=1800 audit(1563575636.472:26): pid=8720 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 61.169571][ T26] audit: type=1800 audit(1563575636.472:27): pid=8720 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 '10.128.1.57' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.537879][ T8873] netlink: 4 bytes leftover after parsing attributes in process `syz-executor876'. [ 76.547557][ T8873] kasan: CONFIG_KASAN_INLINE enabled [ 76.553125][ T8873] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 76.561370][ T8873] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 76.568295][ T8873] CPU: 0 PID: 8873 Comm: syz-executor876 Not tainted 5.2.0-next-20190718 #41 [ 76.577033][ T8873] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.587096][ T8873] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 76.592494][ T8873] Code: 00 00 48 c7 c7 80 c0 da 88 e8 10 6e a1 fb 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c7 85 e8 fe ff ff 00 00 00 00 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 e2 [ 76.612087][ T8873] RSP: 0018:ffff88809416eeb8 EFLAGS: 00010246 [ 76.618305][ T8873] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff1101513a5b9 [ 76.626269][ T8873] RDX: 0000000000000000 RSI: 1ffff1101513a5c0 RDI: 0000000000000282 [ 76.634328][ T8873] RBP: ffff88809416f060 R08: 0000000000000002 R09: ffff8880a89d2dd0 [ 76.642282][ T8873] R10: fffffbfff134a3ff R11: ffffffff89a51fff R12: 0000000000000001 [ 76.650240][ T8873] R13: ffff88809b7396c0 R14: ffff88809416f8c0 R15: 0000000000000000 [ 76.658257][ T8873] FS: 0000555556b10880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 76.667174][ T8873] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.673743][ T8873] CR2: 0000000020000180 CR3: 000000009ab3a000 CR4: 00000000001406f0 [ 76.681707][ T8873] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.689667][ T8873] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.697625][ T8873] Call Trace: [ 76.701114][ T8873] ? tc_lookup_action_n+0xd2/0x100 [ 76.706235][ T8873] ? __add_metainfo+0x480/0x480 [ 76.711071][ T8873] ? tc_lookup_action_n+0xd2/0x100 [ 76.716219][ T8873] ? __kasan_check_read+0x11/0x20 [ 76.721387][ T8873] ? lock_downgrade+0x920/0x920 [ 76.726262][ T8873] ? __kasan_check_write+0x14/0x20 [ 76.731369][ T8873] ? do_raw_read_unlock+0x3f/0x70 [ 76.736383][ T8873] tcf_action_init_1+0x6f2/0xa80 [ 76.741351][ T8873] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 76.747821][ T8873] ? tcf_action_dump_old+0x80/0x80 [ 76.753061][ T8873] ? lock_downgrade+0x920/0x920 [ 76.757915][ T8873] ? __kasan_check_read+0x11/0x20 [ 76.762933][ T8873] ? mark_lock+0xc0/0x11e0 [ 76.767405][ T8873] tcf_action_init+0x241/0x360 [ 76.772551][ T8873] ? tcf_action_init_1+0xa80/0xa80 [ 76.777755][ T8873] ? mark_lock+0xc0/0x11e0 [ 76.782163][ T8873] ? mark_lock+0xc0/0x11e0 [ 76.786675][ T8873] ? __kasan_check_read+0x11/0x20 [ 76.791696][ T8873] tcf_action_add+0xe8/0x370 [ 76.796373][ T8873] ? tca_action_gd+0x1710/0x1710 [ 76.801290][ T8873] ? refcount_dec_not_one+0x1f0/0x1f0 [ 76.806861][ T8873] ? __nla_parse+0x43/0x60 [ 76.811277][ T8873] tc_ctl_action+0x3b5/0x4bc [ 76.815953][ T8873] ? tcf_action_add+0x370/0x370 [ 76.820797][ T8873] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 76.827081][ T8873] ? tcf_action_add+0x370/0x370 [ 76.831921][ T8873] rtnetlink_rcv_msg+0x463/0xb00 [ 76.836882][ T8873] ? rtnetlink_put_metrics+0x580/0x580 [ 76.842478][ T8873] ? lock_downgrade+0x920/0x920 [ 76.847322][ T8873] ? netlink_deliver_tap+0x22d/0xbf0 [ 76.852592][ T8873] ? find_held_lock+0x35/0x130 [ 76.857348][ T8873] netlink_rcv_skb+0x177/0x450 [ 76.862103][ T8873] ? rtnetlink_put_metrics+0x580/0x580 [ 76.867713][ T8873] ? netlink_ack+0xb30/0xb30 [ 76.872301][ T8873] ? __kasan_check_read+0x11/0x20 [ 76.877408][ T8873] ? netlink_deliver_tap+0x254/0xbf0 [ 76.882783][ T8873] rtnetlink_rcv+0x1d/0x30 [ 76.887186][ T8873] netlink_unicast+0x531/0x710 [ 76.891938][ T8873] ? netlink_attachskb+0x7c0/0x7c0 [ 76.897073][ T8873] ? _copy_from_iter_full+0x25d/0x8a0 [ 76.902459][ T8873] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 76.908346][ T8873] ? __check_object_size+0x3d/0x43c [ 76.913540][ T8873] netlink_sendmsg+0x8a5/0xd60 [ 76.918383][ T8873] ? netlink_unicast+0x710/0x710 [ 76.923315][ T8873] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 76.928848][ T8873] ? apparmor_socket_sendmsg+0x2a/0x30 [ 76.934294][ T8873] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 76.940523][ T8873] ? security_socket_sendmsg+0x8d/0xc0 [ 76.946011][ T8873] ? netlink_unicast+0x710/0x710 [ 76.951061][ T8873] sock_sendmsg+0xd7/0x130 [ 76.955551][ T8873] ___sys_sendmsg+0x803/0x920 [ 76.960278][ T8873] ? copy_msghdr_from_user+0x440/0x440 [ 76.965733][ T8873] ? prep_transhuge_page+0xa0/0xa0 [ 76.970834][ T8873] ? percpu_counter_add_batch+0x13c/0x190 [ 76.976533][ T8873] ? __do_page_fault+0x56a/0xdd0 [ 76.981503][ T8873] ? find_held_lock+0x35/0x130 [ 76.986257][ T8873] ? __do_page_fault+0x56a/0xdd0 [ 76.991193][ T8873] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 76.997456][ T8873] ? __fget_light+0x1a9/0x230 [ 77.002172][ T8873] ? __fdget+0x1b/0x20 [ 77.006248][ T8873] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 77.012523][ T8873] __sys_sendmsg+0x105/0x1d0 [ 77.017184][ T8873] ? __sys_sendmsg_sock+0xd0/0xd0 [ 77.022243][ T8873] ? down_read_non_owner+0x450/0x450 [ 77.027609][ T8873] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 77.033054][ T8873] ? do_syscall_64+0x26/0x6a0 [ 77.037997][ T8873] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.044048][ T8873] ? do_syscall_64+0x26/0x6a0 [ 77.048822][ T8873] __x64_sys_sendmsg+0x78/0xb0 [ 77.053587][ T8873] do_syscall_64+0xfd/0x6a0 [ 77.058086][ T8873] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.066465][ T8873] RIP: 0033:0x4401d9 [ 77.071354][ T8873] 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 [ 77.091392][ T8873] RSP: 002b:00007ffed3dd0b78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 77.099881][ T8873] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 77.107938][ T8873] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 77.116193][ T8873] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 77.124155][ T8873] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a60 [ 77.132226][ T8873] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 77.140225][ T8873] Modules linked in: [ 77.145172][ T8873] ---[ end trace 3ec0015f9a6991ce ]--- [ 77.150831][ T8873] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 77.156343][ T8873] Code: 00 00 48 c7 c7 80 c0 da 88 e8 10 6e a1 fb 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c7 85 e8 fe ff ff 00 00 00 00 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 e2 [ 77.176034][ T8873] RSP: 0018:ffff88809416eeb8 EFLAGS: 00010246 [ 77.182142][ T8873] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff1101513a5b9 [ 77.190169][ T8873] RDX: 0000000000000000 RSI: 1ffff1101513a5c0 RDI: 0000000000000282 [ 77.198163][ T8873] RBP: ffff88809416f060 R08: 0000000000000002 R09: ffff8880a89d2dd0 [ 77.206199][ T8873] R10: fffffbfff134a3ff R11: ffffffff89a51fff R12: 0000000000000001 [ 77.214211][ T8873] R13: ffff88809b7396c0 R14: ffff88809416f8c0 R15: 0000000000000000 [ 77.222430][ T8873] FS: 0000555556b10880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 77.231391][ T8873] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.238499][ T8873] CR2: 0000000020000180 CR3: 000000009ab3a000 CR4: 00000000001406f0 [ 77.246528][ T8873] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.254687][ T8873] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.262710][ T8873] Kernel panic - not syncing: Fatal exception [ 77.269817][ T8873] Kernel Offset: disabled [ 77.274180][ T8873] Rebooting in 86400 seconds..