[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 83.929629][ T26] audit: type=1800 audit(1578738302.315:25): pid=9317 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 83.951436][ T26] audit: type=1800 audit(1578738302.325:26): pid=9317 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 84.007220][ T26] audit: type=1800 audit(1578738302.325:27): pid=9317 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 '10.128.0.228' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 95.562762][ T9471] netlink: 4 bytes leftover after parsing attributes in process `syz-executor562'. [ 95.572510][ T9471] kasan: CONFIG_KASAN_INLINE enabled [ 95.577845][ T9471] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 95.585969][ T9471] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 95.592944][ T9471] CPU: 0 PID: 9471 Comm: syz-executor562 Not tainted 5.5.0-rc5-syzkaller #0 [ 95.601655][ T9471] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 95.611696][ T9471] RIP: 0010:tcf_ife_cleanup+0x6e/0x400 [ 95.617131][ T9471] Code: 48 c1 ea 03 80 3c 02 00 0f 85 94 03 00 00 49 8b bd f8 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 67 e8 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5c 03 00 00 48 bb 00 00 00 00 00 fc ff df 48 8b [ 95.636758][ T9471] RSP: 0018:ffffc90001d96d00 EFLAGS: 00010246 [ 95.642802][ T9471] RAX: dffffc0000000000 RBX: ffffffff864619c0 RCX: ffffffff815bfa09 [ 95.650746][ T9471] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000 [ 95.658692][ T9471] RBP: ffffc90001d96d50 R08: 0000000000000004 R09: fffff520003b2d8e [ 95.666642][ T9471] R10: fffff520003b2d8d R11: 0000000000000003 R12: ffffffffffffffe8 [ 95.674604][ T9471] R13: ffff8880a02b3000 R14: ffff888215750e00 R15: 0000000000000000 [ 95.682572][ T9471] FS: 0000000001959880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 95.691473][ T9471] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 95.698029][ T9471] CR2: 0000000020007300 CR3: 0000000091b4e000 CR4: 00000000001406f0 [ 95.705993][ T9471] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 95.713947][ T9471] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 95.721900][ T9471] Call Trace: [ 95.725182][ T9471] ? unregister_ife_op+0x270/0x270 [ 95.730272][ T9471] tcf_action_cleanup+0x62/0x1b0 [ 95.735191][ T9471] __tcf_action_put+0xfa/0x130 [ 95.739933][ T9471] __tcf_idr_release+0x59/0xf0 [ 95.744673][ T9471] tcf_ife_init+0x97c/0x1870 [ 95.749260][ T9471] ? tcf_ife_dump+0xc00/0xc00 [ 95.753917][ T9471] ? tc_lookup_action_n+0xd2/0x100 [ 95.759007][ T9471] ? lock_downgrade+0x920/0x920 [ 95.763881][ T9471] ? __kasan_check_write+0x14/0x20 [ 95.768970][ T9471] ? do_raw_read_unlock+0x3f/0x70 [ 95.773986][ T9471] tcf_action_init_1+0x6b6/0xa40 [ 95.778900][ T9471] ? tcf_action_dump_old+0x80/0x80 [ 95.783984][ T9471] ? __nla_validate_parse+0x2d0/0x1ee0 [ 95.789416][ T9471] ? __kasan_check_read+0x11/0x20 [ 95.794415][ T9471] ? mark_lock+0xc2/0x1220 [ 95.798804][ T9471] ? is_bpf_text_address+0xac/0x160 [ 95.803996][ T9471] tcf_action_init+0x21a/0x330 [ 95.808739][ T9471] ? tcf_action_init_1+0xa40/0xa40 [ 95.813840][ T9471] ? __lock_acquire+0x16f2/0x4a00 [ 95.818843][ T9471] ? mark_lock+0xc2/0x1220 [ 95.823256][ T9471] ? __kasan_check_read+0x11/0x20 [ 95.828272][ T9471] tcf_action_add+0xf5/0x3b0 [ 95.832844][ T9471] ? tca_action_gd+0x1760/0x1760 [ 95.837775][ T9471] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 95.844008][ T9471] ? __nla_parse+0x43/0x60 [ 95.848441][ T9471] tc_ctl_action+0x390/0x488 [ 95.853048][ T9471] ? tcf_action_add+0x3b0/0x3b0 [ 95.857882][ T9471] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 95.864102][ T9471] ? tcf_action_add+0x3b0/0x3b0 [ 95.868929][ T9471] rtnetlink_rcv_msg+0x45e/0xaf0 [ 95.873846][ T9471] ? rtnl_bridge_getlink+0x910/0x910 [ 95.879105][ T9471] ? lock_downgrade+0x920/0x920 [ 95.883932][ T9471] ? netlink_deliver_tap+0x228/0xbe0 [ 95.889190][ T9471] ? find_held_lock+0x35/0x130 [ 95.893931][ T9471] netlink_rcv_skb+0x177/0x450 [ 95.898672][ T9471] ? rtnl_bridge_getlink+0x910/0x910 [ 95.903935][ T9471] ? netlink_ack+0xb50/0xb50 [ 95.908500][ T9471] ? __kasan_check_read+0x11/0x20 [ 95.913518][ T9471] ? netlink_deliver_tap+0x24a/0xbe0 [ 95.918776][ T9471] rtnetlink_rcv+0x1d/0x30 [ 95.923168][ T9471] netlink_unicast+0x58c/0x7d0 [ 95.927976][ T9471] ? netlink_attachskb+0x870/0x870 [ 95.933086][ T9471] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 95.938833][ T9471] ? __check_object_size+0x3d/0x437 [ 95.944015][ T9471] netlink_sendmsg+0x91c/0xea0 [ 95.948761][ T9471] ? netlink_unicast+0x7d0/0x7d0 [ 95.953691][ T9471] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 95.959209][ T9471] ? apparmor_socket_sendmsg+0x2a/0x30 [ 95.964646][ T9471] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 95.970866][ T9471] ? security_socket_sendmsg+0x8d/0xc0 [ 95.976303][ T9471] ? netlink_unicast+0x7d0/0x7d0 [ 95.981216][ T9471] sock_sendmsg+0xd7/0x130 [ 95.985617][ T9471] ____sys_sendmsg+0x753/0x880 [ 95.990358][ T9471] ? kernel_sendmsg+0x50/0x50 [ 95.995023][ T9471] ? mark_held_locks+0xa4/0xf0 [ 95.999780][ T9471] ? do_huge_pmd_anonymous_page+0x1463/0x1a50 [ 96.005842][ T9471] ? __handle_mm_fault+0x3145/0x3cc0 [ 96.011104][ T9471] ? do_huge_pmd_anonymous_page+0x1463/0x1a50 [ 96.017149][ T9471] ___sys_sendmsg+0x100/0x170 [ 96.021816][ T9471] ? do_huge_pmd_anonymous_page+0xceb/0x1a50 [ 96.027774][ T9471] ? sendmsg_copy_msghdr+0x70/0x70 [ 96.032864][ T9471] ? __do_page_fault+0x56a/0xd80 [ 96.037797][ T9471] ? find_held_lock+0x35/0x130 [ 96.042536][ T9471] ? __do_page_fault+0x56a/0xd80 [ 96.047454][ T9471] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.053668][ T9471] ? __fget_light+0x1a9/0x230 [ 96.058337][ T9471] ? __fdget+0x1b/0x20 [ 96.062395][ T9471] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 96.068613][ T9471] __sys_sendmsg+0x105/0x1d0 [ 96.073184][ T9471] ? __sys_sendmsg_sock+0xc0/0xc0 [ 96.078200][ T9471] ? down_read_non_owner+0x490/0x490 [ 96.083479][ T9471] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 96.088927][ T9471] ? do_syscall_64+0x26/0x790 [ 96.093594][ T9471] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 96.099635][ T9471] ? do_syscall_64+0x26/0x790 [ 96.104289][ T9471] __x64_sys_sendmsg+0x78/0xb0 [ 96.109042][ T9471] do_syscall_64+0xfa/0x790 [ 96.113521][ T9471] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 96.119388][ T9471] RIP: 0033:0x440269 [ 96.123261][ T9471] 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 [ 96.142849][ T9471] RSP: 002b:00007ffcfbb19958 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 96.151299][ T9471] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440269 [ 96.159297][ T9471] RDX: 0000000000000000 RSI: 0000000020007300 RDI: 0000000000000003 [ 96.167251][ T9471] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 96.175201][ T9471] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401af0 [ 96.183191][ T9471] R13: 0000000000401b80 R14: 0000000000000000 R15: 0000000000000000 [ 96.191143][ T9471] Modules linked in: [ 96.195073][ T9471] ---[ end trace bfbcb87e693573ca ]--- [ 96.200531][ T9471] RIP: 0010:tcf_ife_cleanup+0x6e/0x400 [ 96.206009][ T9471] Code: 48 c1 ea 03 80 3c 02 00 0f 85 94 03 00 00 49 8b bd f8 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 67 e8 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5c 03 00 00 48 bb 00 00 00 00 00 fc ff df 48 8b [ 96.225780][ T9471] RSP: 0018:ffffc90001d96d00 EFLAGS: 00010246 [ 96.231859][ T9471] RAX: dffffc0000000000 RBX: ffffffff864619c0 RCX: ffffffff815bfa09 [ 96.239869][ T9471] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000 [ 96.247864][ T9471] RBP: ffffc90001d96d50 R08: 0000000000000004 R09: fffff520003b2d8e [ 96.255846][ T9471] R10: fffff520003b2d8d R11: 0000000000000003 R12: ffffffffffffffe8 [ 96.263828][ T9471] R13: ffff8880a02b3000 R14: ffff888215750e00 R15: 0000000000000000 [ 96.271808][ T9471] FS: 0000000001959880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 96.280753][ T9471] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 96.287343][ T9471] CR2: 0000000020007300 CR3: 0000000091b4e000 CR4: 00000000001406f0 [ 96.295324][ T9471] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 96.303300][ T9471] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 96.311259][ T9471] Kernel panic - not syncing: Fatal exception in interrupt [ 96.319759][ T9471] Kernel Offset: disabled [ 96.324093][ T9471] Rebooting in 86400 seconds..