[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 84.210656][ T30] audit: type=1800 audit(1572512818.250:25): pid=11751 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 84.234297][ T30] audit: type=1800 audit(1572512818.280:26): pid=11751 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 84.270236][ T30] audit: type=1800 audit(1572512818.300:27): pid=11751 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 '10.128.10.36' (ECDSA) to the list of known hosts. 2019/10/31 09:07:12 parsed 1 programs 2019/10/31 09:07:20 executed programs: 0 syzkaller login: [ 106.676108][T11917] IPVS: ftp: loaded support on port[0] = 21 [ 106.757894][T11917] chnl_net:caif_netlink_parms(): no params data found [ 106.794674][T11917] bridge0: port 1(bridge_slave_0) entered blocking state [ 106.802032][T11917] bridge0: port 1(bridge_slave_0) entered disabled state [ 106.810094][T11917] device bridge_slave_0 entered promiscuous mode [ 106.818860][T11917] bridge0: port 2(bridge_slave_1) entered blocking state [ 106.826216][T11917] bridge0: port 2(bridge_slave_1) entered disabled state [ 106.834686][T11917] device bridge_slave_1 entered promiscuous mode [ 106.856125][T11917] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 106.867670][T11917] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 106.890658][T11917] team0: Port device team_slave_0 added [ 106.898479][T11917] team0: Port device team_slave_1 added [ 106.954762][T11917] device hsr_slave_0 entered promiscuous mode [ 107.002585][T11917] device hsr_slave_1 entered promiscuous mode [ 107.119759][T11917] bridge0: port 2(bridge_slave_1) entered blocking state [ 107.127059][T11917] bridge0: port 2(bridge_slave_1) entered forwarding state [ 107.134915][T11917] bridge0: port 1(bridge_slave_0) entered blocking state [ 107.142269][T11917] bridge0: port 1(bridge_slave_0) entered forwarding state [ 107.323368][T11917] 8021q: adding VLAN 0 to HW filter on device bond0 [ 107.345501][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 107.362452][ T5] bridge0: port 1(bridge_slave_0) entered disabled state [ 107.383273][ T5] bridge0: port 2(bridge_slave_1) entered disabled state [ 107.404676][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 107.448930][T11917] 8021q: adding VLAN 0 to HW filter on device team0 [ 107.491832][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 107.500948][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 107.508301][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 107.596261][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 107.605783][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 107.613113][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 107.623759][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 107.634017][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 107.643669][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 107.652998][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 107.676398][T11917] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 107.765692][T11917] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 107.786972][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 108.442497][ T1166] Bluetooth: Error in BCSP hdr checksum [ 108.702260][ T187] Bluetooth: Error in BCSP hdr checksum [ 110.251957][ T5] Bluetooth: hci0: command 0x1003 tx timeout [ 110.258202][T11960] Bluetooth: hci0: sending frame failed (-49) [ 112.331959][ T36] Bluetooth: hci0: command 0x1001 tx timeout [ 112.338185][T11960] Bluetooth: hci0: sending frame failed (-49) [ 114.411910][ T5] Bluetooth: hci0: command 0x1009 tx timeout [ 118.813950][T11956] ===================================================== [ 118.820945][T11956] BUG: KMSAN: use-after-free in kfree_skb+0x23c/0x4c0 [ 118.827802][T11956] CPU: 0 PID: 11956 Comm: syz-executor.0 Not tainted 5.4.0-rc5+ #0 [ 118.835668][T11956] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 118.845703][T11956] Call Trace: [ 118.848983][T11956] dump_stack+0x191/0x1f0 [ 118.853306][T11956] kmsan_report+0x128/0x220 [ 118.857807][T11956] __msan_warning+0x73/0xe0 [ 118.862438][T11956] kfree_skb+0x23c/0x4c0 [ 118.866677][T11956] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 118.872572][T11956] bcsp_close+0x127/0x1e0 [ 118.876897][T11956] ? bcsp_open+0x5d0/0x5d0 [ 118.881294][T11956] hci_uart_tty_close+0x385/0x410 [ 118.886322][T11956] ? hci_uart_tty_open+0x5a0/0x5a0 [ 118.891568][T11956] tty_ldisc_release+0x5dd/0xd50 [ 118.896524][T11956] tty_release_struct+0x4f/0x1d0 [ 118.901462][T11956] ? tty_unlock+0x82/0x100 [ 118.905969][T11956] tty_release+0x1be2/0x1e80 [ 118.910575][T11956] ? tty_release_struct+0x1d0/0x1d0 [ 118.915760][T11956] __fput+0x4c9/0xba0 [ 118.919772][T11956] ____fput+0x37/0x40 [ 118.923745][T11956] ? fput_many+0x2a0/0x2a0 [ 118.928145][T11956] task_work_run+0x22e/0x2a0 [ 118.932743][T11956] prepare_exit_to_usermode+0x39d/0x4d0 [ 118.938298][T11956] syscall_return_slowpath+0x90/0x610 [ 118.943840][T11956] do_syscall_64+0xdc/0x160 [ 118.948335][T11956] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 118.954222][T11956] RIP: 0033:0x413ae1 [ 118.958097][T11956] Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 [ 118.977703][T11956] RSP: 002b:00007ffeed2b2d80 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 118.986162][T11956] RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000413ae1 [ 118.994129][T11956] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 [ 119.002085][T11956] RBP: 0000000000000001 R08: ffffffffffffffff R09: ffffffffffffffff [ 119.010035][T11956] R10: 00007ffeed2b2e60 R11: 0000000000000293 R12: 000000000075c9a0 [ 119.017987][T11956] R13: 000000000075c9a0 R14: 00000000007603f0 R15: 000000000075bfd4 [ 119.025950][T11956] [ 119.028257][T11956] Uninit was created at: [ 119.032485][T11956] kmsan_internal_poison_shadow+0x60/0x120 [ 119.038285][T11956] kmsan_slab_free+0x8d/0xf0 [ 119.044079][T11956] kmem_cache_free+0x2d1/0x2b70 [ 119.048907][T11956] kfree_skb+0x473/0x4c0 [ 119.053131][T11956] hci_cmd_work+0xfd/0x4f0 [ 119.057526][T11956] process_one_work+0x1572/0x1ef0 [ 119.062530][T11956] worker_thread+0x111b/0x2460 [ 119.067271][T11956] kthread+0x4b5/0x4f0 [ 119.071316][T11956] ret_from_fork+0x35/0x40 [ 119.075719][T11956] ===================================================== [ 119.082817][T11956] Disabling lock debugging due to kernel taint [ 119.088954][T11956] Kernel panic - not syncing: panic_on_warn set ... [ 119.095528][T11956] CPU: 0 PID: 11956 Comm: syz-executor.0 Tainted: G B 5.4.0-rc5+ #0 [ 119.104783][T11956] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 119.114817][T11956] Call Trace: [ 119.118094][T11956] dump_stack+0x191/0x1f0 [ 119.122424][T11956] panic+0x3c9/0xc1e [ 119.126331][T11956] kmsan_report+0x215/0x220 [ 119.130830][T11956] __msan_warning+0x73/0xe0 [ 119.135405][T11956] kfree_skb+0x23c/0x4c0 [ 119.139628][T11956] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 119.145505][T11956] bcsp_close+0x127/0x1e0 [ 119.149815][T11956] ? bcsp_open+0x5d0/0x5d0 [ 119.154215][T11956] hci_uart_tty_close+0x385/0x410 [ 119.159220][T11956] ? hci_uart_tty_open+0x5a0/0x5a0 [ 119.164335][T11956] tty_ldisc_release+0x5dd/0xd50 [ 119.169272][T11956] tty_release_struct+0x4f/0x1d0 [ 119.174189][T11956] ? tty_unlock+0x82/0x100 [ 119.178585][T11956] tty_release+0x1be2/0x1e80 [ 119.183166][T11956] ? tty_release_struct+0x1d0/0x1d0 [ 119.188362][T11956] __fput+0x4c9/0xba0 [ 119.192438][T11956] ____fput+0x37/0x40 [ 119.196415][T11956] ? fput_many+0x2a0/0x2a0 [ 119.200824][T11956] task_work_run+0x22e/0x2a0 [ 119.205401][T11956] prepare_exit_to_usermode+0x39d/0x4d0 [ 119.210929][T11956] syscall_return_slowpath+0x90/0x610 [ 119.216309][T11956] do_syscall_64+0xdc/0x160 [ 119.220795][T11956] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 119.226667][T11956] RIP: 0033:0x413ae1 [ 119.230559][T11956] Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 [ 119.250303][T11956] RSP: 002b:00007ffeed2b2d80 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 119.258700][T11956] RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000413ae1 [ 119.266668][T11956] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 [ 119.274640][T11956] RBP: 0000000000000001 R08: ffffffffffffffff R09: ffffffffffffffff [ 119.282724][T11956] R10: 00007ffeed2b2e60 R11: 0000000000000293 R12: 000000000075c9a0 [ 119.290680][T11956] R13: 000000000075c9a0 R14: 00000000007603f0 R15: 000000000075bfd4 [ 119.299893][T11956] Kernel Offset: disabled [ 119.304220][T11956] Rebooting in 86400 seconds..