[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 60.882199][ T24] audit: type=1800 audit(1563576844.541:25): pid=9047 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 60.922317][ T24] audit: type=1800 audit(1563576844.541:26): pid=9047 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 60.970538][ T24] audit: type=1800 audit(1563576844.541:27): pid=9047 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 '10.128.15.199' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 87.148666][ T9199] netlink: 4 bytes leftover after parsing attributes in process `syz-executor987'. [ 87.158385][ T9199] kasan: CONFIG_KASAN_INLINE enabled [ 87.163917][ T9199] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 87.172038][ T9199] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 87.178971][ T9199] CPU: 0 PID: 9199 Comm: syz-executor987 Not tainted 5.2.0+ #93 [ 87.186613][ T9199] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.196785][ T9199] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 87.202151][ T9199] Code: 00 00 48 c7 c7 c0 aa da 88 e8 40 13 a9 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 [ 87.221743][ T9199] RSP: 0018:ffff88808bca6eb8 EFLAGS: 00010246 [ 87.227801][ T9199] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110143e9138 [ 87.235804][ T9199] RDX: 0000000000000000 RSI: 1ffff110143e913f RDI: 0000000000000286 [ 87.243773][ T9199] RBP: ffff88808bca7060 R08: 0000000000000002 R09: ffff8880a1f489c8 [ 87.251732][ T9199] R10: fffffbfff1345337 R11: ffffffff89a299bf R12: 0000000000000001 [ 87.259724][ T9199] R13: ffff88809b45c000 R14: ffff88808bca78c0 R15: 0000000000000000 [ 87.267836][ T9199] FS: 0000555555ce7880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 87.276868][ T9199] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.283430][ T9199] CR2: 0000000020000180 CR3: 00000000a8afd000 CR4: 00000000001406f0 [ 87.291474][ T9199] Call Trace: [ 87.294774][ T9199] ? tc_lookup_action_n+0xd2/0x100 [ 87.299871][ T9199] ? __add_metainfo+0x480/0x480 [ 87.304745][ T9199] ? tc_lookup_action_n+0xd2/0x100 [ 87.309945][ T9199] ? lock_downgrade+0x920/0x920 [ 87.314807][ T9199] ? __kasan_check_write+0x14/0x20 [ 87.319902][ T9199] ? do_raw_read_unlock+0x3f/0x70 [ 87.325067][ T9199] tcf_action_init_1+0x6f2/0xa80 [ 87.329998][ T9199] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 87.336331][ T9199] ? tcf_action_dump_old+0x80/0x80 [ 87.341426][ T9199] ? lock_downgrade+0x920/0x920 [ 87.346309][ T9199] ? __kasan_check_read+0x11/0x20 [ 87.351324][ T9199] ? mark_lock+0xc0/0x11e0 [ 87.355728][ T9199] tcf_action_init+0x241/0x360 [ 87.360551][ T9199] ? tcf_action_init_1+0xa80/0xa80 [ 87.365682][ T9199] ? mark_lock+0xc0/0x11e0 [ 87.370081][ T9199] ? mark_lock+0xc0/0x11e0 [ 87.374482][ T9199] ? __kasan_check_read+0x11/0x20 [ 87.379549][ T9199] tcf_action_add+0xe8/0x370 [ 87.384126][ T9199] ? tca_action_gd+0x1730/0x1730 [ 87.389190][ T9199] ? refcount_dec_not_one+0x1f0/0x1f0 [ 87.394644][ T9199] ? __nla_parse+0x43/0x60 [ 87.399039][ T9199] tc_ctl_action+0x3b5/0x4bc [ 87.403653][ T9199] ? tcf_action_add+0x370/0x370 [ 87.408501][ T9199] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 87.414727][ T9199] ? tcf_action_add+0x370/0x370 [ 87.419563][ T9199] rtnetlink_rcv_msg+0x463/0xb00 [ 87.424483][ T9199] ? rtnetlink_put_metrics+0x590/0x590 [ 87.429926][ T9199] ? lock_downgrade+0x920/0x920 [ 87.434767][ T9199] ? netlink_deliver_tap+0x22d/0xbf0 [ 87.440045][ T9199] ? find_held_lock+0x35/0x130 [ 87.444796][ T9199] netlink_rcv_skb+0x177/0x450 [ 87.449541][ T9199] ? rtnetlink_put_metrics+0x590/0x590 [ 87.455349][ T9199] ? netlink_ack+0xb50/0xb50 [ 87.459927][ T9199] ? __kasan_check_read+0x11/0x20 [ 87.465007][ T9199] ? netlink_deliver_tap+0x254/0xbf0 [ 87.470329][ T9199] rtnetlink_rcv+0x1d/0x30 [ 87.474737][ T9199] netlink_unicast+0x531/0x710 [ 87.479479][ T9199] ? netlink_attachskb+0x7c0/0x7c0 [ 87.484592][ T9199] ? _copy_from_iter_full+0x25d/0x8c0 [ 87.489952][ T9199] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 87.495656][ T9199] ? __check_object_size+0x3d/0x43c [ 87.500867][ T9199] netlink_sendmsg+0x8ae/0xd70 [ 87.505618][ T9199] ? netlink_unicast+0x710/0x710 [ 87.510564][ T9199] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 87.516093][ T9199] ? apparmor_socket_sendmsg+0x2a/0x30 [ 87.521530][ T9199] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 87.527755][ T9199] ? security_socket_sendmsg+0x8d/0xc0 [ 87.533196][ T9199] ? netlink_unicast+0x710/0x710 [ 87.538110][ T9199] sock_sendmsg+0xd7/0x130 [ 87.542504][ T9199] ___sys_sendmsg+0x803/0x920 [ 87.547168][ T9199] ? copy_msghdr_from_user+0x440/0x440 [ 87.552673][ T9199] ? prep_transhuge_page+0xa0/0xa0 [ 87.557774][ T9199] ? __lock_acquire+0x8a0/0x4690 [ 87.562695][ T9199] ? percpu_counter_add_batch+0x13c/0x190 [ 87.568401][ T9199] ? __do_page_fault+0x56a/0xdd0 [ 87.573319][ T9199] ? find_held_lock+0x35/0x130 [ 87.578092][ T9199] ? __do_page_fault+0x56a/0xdd0 [ 87.583016][ T9199] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 87.589320][ T9199] ? __fget_light+0x1a9/0x230 [ 87.593981][ T9199] ? __fdget+0x1b/0x20 [ 87.598035][ T9199] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 87.604329][ T9199] __sys_sendmsg+0x105/0x1d0 [ 87.608914][ T9199] ? __sys_sendmsg_sock+0xd0/0xd0 [ 87.613925][ T9199] ? down_read_non_owner+0x450/0x450 [ 87.619196][ T9199] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 87.624637][ T9199] ? do_syscall_64+0x26/0x6a0 [ 87.629300][ T9199] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 87.635354][ T9199] ? do_syscall_64+0x26/0x6a0 [ 87.640036][ T9199] __x64_sys_sendmsg+0x78/0xb0 [ 87.644784][ T9199] do_syscall_64+0xfd/0x6a0 [ 87.649262][ T9199] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 87.655170][ T9199] RIP: 0033:0x4401d9 [ 87.659091][ T9199] 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 [ 87.678680][ T9199] RSP: 002b:00007ffdf7cf1288 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 87.687077][ T9199] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 87.695034][ T9199] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 87.702987][ T9199] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 87.710940][ T9199] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a60 [ 87.718914][ T9199] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 87.726983][ T9199] Modules linked in: [ 87.731715][ T9199] ---[ end trace 65a86976eecd670d ]--- [ 87.737293][ T9199] RIP: 0010:tcf_ife_init+0x25c/0x1850 [ 87.742691][ T9199] Code: 00 00 48 c7 c7 c0 aa da 88 e8 40 13 a9 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 [ 87.762319][ T9199] RSP: 0018:ffff88808bca6eb8 EFLAGS: 00010246 [ 87.768374][ T9199] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110143e9138 [ 87.776427][ T9199] RDX: 0000000000000000 RSI: 1ffff110143e913f RDI: 0000000000000286 [ 87.784424][ T9199] RBP: ffff88808bca7060 R08: 0000000000000002 R09: ffff8880a1f489c8 [ 87.792518][ T9199] R10: fffffbfff1345337 R11: ffffffff89a299bf R12: 0000000000000001 [ 87.800488][ T9199] R13: ffff88809b45c000 R14: ffff88808bca78c0 R15: 0000000000000000 [ 87.808488][ T9199] FS: 0000555555ce7880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 87.817661][ T9199] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.824324][ T9199] CR2: 0000000020000180 CR3: 00000000a8afd000 CR4: 00000000001406f0 [ 87.832323][ T9199] Kernel panic - not syncing: Fatal exception [ 87.839428][ T9199] Kernel Offset: disabled [ 87.843748][ T9199] Rebooting in 86400 seconds..