[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.217' (ECDSA) to the list of known hosts. 2020/08/07 00:23:22 parsed 1 programs 2020/08/07 00:23:22 executed programs: 0 syzkaller login: [ 1049.304219][ T6864] IPVS: ftp: loaded support on port[0] = 21 [ 1049.399339][ T6864] chnl_net:caif_netlink_parms(): no params data found [ 1049.446699][ T6864] bridge0: port 1(bridge_slave_0) entered blocking state [ 1049.454690][ T6864] bridge0: port 1(bridge_slave_0) entered disabled state [ 1049.462725][ T6864] device bridge_slave_0 entered promiscuous mode [ 1049.471377][ T6864] bridge0: port 2(bridge_slave_1) entered blocking state [ 1049.478561][ T6864] bridge0: port 2(bridge_slave_1) entered disabled state [ 1049.486315][ T6864] device bridge_slave_1 entered promiscuous mode [ 1049.504906][ T6864] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 1049.515679][ T6864] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 1049.536519][ T6864] team0: Port device team_slave_0 added [ 1049.543920][ T6864] team0: Port device team_slave_1 added [ 1049.560212][ T6864] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 1049.567386][ T6864] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 1049.593340][ T6864] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 1049.605869][ T6864] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 1049.612954][ T6864] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 1049.638872][ T6864] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 1049.694178][ T6864] device hsr_slave_0 entered promiscuous mode [ 1049.721871][ T6864] device hsr_slave_1 entered promiscuous mode [ 1049.864621][ T6864] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 1049.924337][ T6864] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 1049.963888][ T6864] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 1050.004507][ T6864] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 1050.075896][ T6864] bridge0: port 2(bridge_slave_1) entered blocking state [ 1050.083018][ T6864] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1050.090492][ T6864] bridge0: port 1(bridge_slave_0) entered blocking state [ 1050.097598][ T6864] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1050.137081][ T6864] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1050.151103][ T6834] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1050.162064][ T6834] bridge0: port 1(bridge_slave_0) entered disabled state [ 1050.170324][ T6834] bridge0: port 2(bridge_slave_1) entered disabled state [ 1050.178514][ T6834] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1050.191141][ T6864] 8021q: adding VLAN 0 to HW filter on device team0 [ 1050.203027][ T2545] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1050.211321][ T2545] bridge0: port 1(bridge_slave_0) entered blocking state [ 1050.218414][ T2545] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1050.233055][ T6834] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1050.241375][ T6834] bridge0: port 2(bridge_slave_1) entered blocking state [ 1050.248458][ T6834] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1050.273130][ T2545] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1050.282985][ T2545] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1050.291235][ T2545] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1050.300051][ T2545] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1050.309291][ T2545] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1050.318606][ T6864] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 1050.336306][ T6834] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 1050.344816][ T6834] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 1050.357155][ T6864] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1050.376313][ T6834] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 1050.395372][ T2545] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 1050.403744][ T2545] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 1050.414025][ T2545] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 1050.422386][ T2545] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 1050.438087][ T6864] device veth0_vlan entered promiscuous mode [ 1050.448624][ T6864] device veth1_vlan entered promiscuous mode [ 1050.468336][ T6834] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 1050.476884][ T6834] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 1050.485275][ T6834] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 1050.494172][ T6834] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 1050.504607][ T6864] device veth0_macvtap entered promiscuous mode [ 1050.516295][ T6864] device veth1_macvtap entered promiscuous mode [ 1050.530693][ T6864] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 1050.538386][ T6834] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 1050.547495][ T6834] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 1050.555744][ T6834] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 1050.564415][ T6834] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 1050.577153][ T6864] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 1050.585520][ T2545] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 1050.594451][ T2545] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 1050.605653][ T6864] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 1050.614799][ T6864] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 1050.623753][ T6864] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 1050.632887][ T6864] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 1053.955542][ T6834] Bluetooth: hci0: command 0x0409 tx timeout 2020/08/07 00:23:27 executed programs: 77 [ 1056.040961][ T12] Bluetooth: hci0: command 0x041b tx timeout [ 1058.110570][ T6834] Bluetooth: hci0: command 0x040f tx timeout 2020/08/07 00:23:32 executed programs: 249 [ 1060.190324][ T12] Bluetooth: hci0: command 0x0419 tx timeout 2020/08/07 00:23:37 executed programs: 419 2020/08/07 00:23:42 executed programs: 585 2020/08/07 00:23:47 executed programs: 762 2020/08/07 00:23:52 executed programs: 937 2020/08/07 00:23:57 executed programs: 1112 2020/08/07 00:24:02 executed programs: 1284 2020/08/07 00:24:07 executed programs: 1444 2020/08/07 00:24:12 executed programs: 1618 2020/08/07 00:24:17 executed programs: 1791 2020/08/07 00:24:22 executed programs: 1954 2020/08/07 00:24:27 executed programs: 2127 2020/08/07 00:24:33 executed programs: 2288 2020/08/07 00:24:38 executed programs: 2467 2020/08/07 00:24:43 executed programs: 2631 2020/08/07 00:24:48 executed programs: 2797 2020/08/07 00:24:53 executed programs: 2965 2020/08/07 00:24:58 executed programs: 3127 2020/08/07 00:25:03 executed programs: 3299 2020/08/07 00:25:08 executed programs: 3456 2020/08/07 00:25:13 executed programs: 3627 2020/08/07 00:25:18 executed programs: 3790 2020/08/07 00:25:23 executed programs: 3943 2020/08/07 00:25:28 executed programs: 4091 [ 1176.370709][ T6864] ================================================================== [ 1176.379035][ T6864] BUG: KASAN: use-after-free in hci_chan_del+0x14f/0x190 [ 1176.386031][ T6864] Read of size 8 at addr ffff8880a5e9c718 by task syz-executor.0/6864 [ 1176.394146][ T6864] [ 1176.396456][ T6864] CPU: 1 PID: 6864 Comm: syz-executor.0 Not tainted 5.8.0-rc7-next-20200731-syzkaller #0 [ 1176.406311][ T6864] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1176.416366][ T6864] Call Trace: [ 1176.419686][ T6864] dump_stack+0x18f/0x20d [ 1176.424000][ T6864] ? hci_chan_del+0x14f/0x190 [ 1176.428652][ T6864] ? hci_chan_del+0x14f/0x190 [ 1176.433356][ T6864] print_address_description.constprop.0.cold+0xae/0x497 [ 1176.440400][ T6864] ? mutex_lock_io_nested+0xf60/0xf60 [ 1176.445766][ T6864] ? lockdep_hardirqs_off+0x7e/0xb0 [ 1176.450954][ T6864] ? vprintk_func+0x97/0x1a6 [ 1176.455521][ T6864] ? hci_chan_del+0x14f/0x190 [ 1176.460174][ T6864] ? hci_chan_del+0x14f/0x190 [ 1176.464826][ T6864] kasan_report.cold+0x1f/0x37 [ 1176.469565][ T6864] ? hci_chan_del+0x14f/0x190 [ 1176.474216][ T6864] hci_chan_del+0x14f/0x190 [ 1176.478729][ T6864] l2cap_conn_del+0x61b/0x9e0 [ 1176.483383][ T6864] ? l2cap_conn_del+0x9e0/0x9e0 [ 1176.488236][ T6864] l2cap_disconn_cfm+0x85/0xa0 [ 1176.492974][ T6864] hci_conn_hash_flush+0x114/0x220 [ 1176.498064][ T6864] hci_dev_do_close+0x5c6/0x1080 [ 1176.502979][ T6864] ? hci_dev_open+0x350/0x350 [ 1176.507699][ T6864] ? do_raw_read_unlock+0x70/0x70 [ 1176.512749][ T6864] ? try_to_grab_pending.part.0+0x7d0/0x7d0 [ 1176.518622][ T6864] hci_unregister_dev+0x1bd/0xe30 [ 1176.523658][ T6864] ? fcntl_setlk+0xf60/0xf60 [ 1176.528226][ T6864] ? lock_is_held_type+0xbb/0xf0 [ 1176.533195][ T6864] vhci_release+0x70/0xe0 [ 1176.537540][ T6864] __fput+0x285/0x920 [ 1176.541498][ T6864] ? vhci_close_dev+0x50/0x50 [ 1176.546148][ T6864] task_work_run+0xdd/0x190 [ 1176.550652][ T6864] do_exit+0xb7d/0x29f0 [ 1176.554785][ T6864] ? mm_update_next_owner+0x7a0/0x7a0 [ 1176.560146][ T6864] ? vfs_write+0x62b/0x730 [ 1176.564539][ T6864] ? vfs_write+0x1b0/0x730 [ 1176.568934][ T6864] ? lock_is_held_type+0xbb/0xf0 [ 1176.573846][ T6864] do_group_exit+0x125/0x310 [ 1176.578412][ T6864] __x64_sys_exit_group+0x3a/0x50 [ 1176.583409][ T6864] do_syscall_64+0x2d/0x70 [ 1176.587800][ T6864] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1176.593664][ T6864] RIP: 0033:0x45ccd9 [ 1176.597569][ T6864] Code: Bad RIP value. [ 1176.601607][ T6864] RSP: 002b:00007fff6e430db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 1176.609993][ T6864] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000045ccd9 [ 1176.617941][ T6864] RDX: 0000000000416731 RSI: 0000000000ca85f0 RDI: 0000000000000043 [ 1176.625885][ T6864] RBP: 00000000004c2963 R08: 000000000000000b R09: 0000000000000000 [ 1176.633852][ T6864] R10: 00000000016f2940 R11: 0000000000000246 R12: 0000000000000003 [ 1176.641800][ T6864] R13: 00007fff6e430f00 R14: 000000000011f395 R15: 00007fff6e430f10 [ 1176.649750][ T6864] [ 1176.652088][ T6864] Allocated by task 21261: [ 1176.656481][ T6864] kasan_save_stack+0x1b/0x40 [ 1176.661132][ T6864] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 1176.666737][ T6864] kmem_cache_alloc_trace+0x16e/0x2c0 [ 1176.672106][ T6864] kernfs_fop_open+0x957/0xd40 [ 1176.676844][ T6864] do_dentry_open+0x4b9/0x11b0 [ 1176.681599][ T6864] path_openat+0x1b9a/0x2730 [ 1176.686162][ T6864] do_filp_open+0x17e/0x3c0 [ 1176.690643][ T6864] do_sys_openat2+0x16d/0x420 [ 1176.695306][ T6864] __x64_sys_open+0x119/0x1c0 [ 1176.699961][ T6864] do_syscall_64+0x2d/0x70 [ 1176.704353][ T6864] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1176.710212][ T6864] [ 1176.712525][ T6864] Freed by task 21261: [ 1176.716568][ T6864] kasan_save_stack+0x1b/0x40 [ 1176.721217][ T6864] kasan_set_track+0x1c/0x30 [ 1176.725781][ T6864] kasan_set_free_info+0x1b/0x30 [ 1176.730692][ T6864] __kasan_slab_free+0xd8/0x120 [ 1176.735512][ T6864] kfree+0x103/0x2c0 [ 1176.739381][ T6864] kernfs_fop_release+0xe3/0x190 [ 1176.744306][ T6864] __fput+0x285/0x920 [ 1176.748266][ T6864] task_work_run+0xdd/0x190 [ 1176.752871][ T6864] exit_to_user_mode_prepare+0x195/0x1c0 [ 1176.758484][ T6864] syscall_exit_to_user_mode+0x59/0x2b0 [ 1176.764010][ T6864] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1176.769868][ T6864] [ 1176.772175][ T6864] The buggy address belongs to the object at ffff8880a5e9c700 [ 1176.772175][ T6864] which belongs to the cache kmalloc-128 of size 128 [ 1176.786292][ T6864] The buggy address is located 24 bytes inside of [ 1176.786292][ T6864] 128-byte region [ffff8880a5e9c700, ffff8880a5e9c780) [ 1176.799457][ T6864] The buggy address belongs to the page: [ 1176.805075][ T6864] page:00000000d76f75fa refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880a5e9c300 pfn:0xa5e9c [ 1176.816541][ T6864] flags: 0xfffe0000000200(slab) [ 1176.821408][ T6864] raw: 00fffe0000000200 ffffea0002a441c8 ffffea0002a11b88 ffff8880aa000400 [ 1176.829971][ T6864] raw: ffff8880a5e9c300 ffff8880a5e9c000 000000010000000b 0000000000000000 [ 1176.838527][ T6864] page dumped because: kasan: bad access detected [ 1176.844912][ T6864] [ 1176.847214][ T6864] Memory state around the buggy address: [ 1176.852828][ T6864] ffff8880a5e9c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1176.860866][ T6864] ffff8880a5e9c680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 1176.868942][ T6864] >ffff8880a5e9c700: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1176.876976][ T6864] ^ [ 1176.881801][ T6864] ffff8880a5e9c780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 1176.889836][ T6864] ffff8880a5e9c800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1176.897867][ T6864] ================================================================== [ 1176.905910][ T6864] Disabling lock debugging due to kernel taint [ 1176.916828][ T6864] Kernel panic - not syncing: panic_on_warn set ... [ 1176.923453][ T6864] CPU: 1 PID: 6864 Comm: syz-executor.0 Tainted: G B 5.8.0-rc7-next-20200731-syzkaller #0 [ 1176.934631][ T6864] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1176.944692][ T6864] Call Trace: [ 1176.947971][ T6864] dump_stack+0x18f/0x20d [ 1176.952276][ T6864] ? hci_chan_del+0x140/0x190 [ 1176.956978][ T6864] panic+0x2e3/0x75c [ 1176.960851][ T6864] ? __warn_printk+0xf3/0xf3 [ 1176.965417][ T6864] ? preempt_schedule_common+0x59/0xc0 [ 1176.970849][ T6864] ? hci_chan_del+0x14f/0x190 [ 1176.975559][ T6864] ? preempt_schedule_thunk+0x16/0x18 [ 1176.980943][ T6864] ? trace_hardirqs_on+0x55/0x220 [ 1176.985942][ T6864] ? hci_chan_del+0x14f/0x190 [ 1176.990591][ T6864] ? hci_chan_del+0x14f/0x190 [ 1176.995242][ T6864] end_report+0x4d/0x53 [ 1176.999371][ T6864] kasan_report.cold+0xd/0x37 [ 1177.004028][ T6864] ? hci_chan_del+0x14f/0x190 [ 1177.008690][ T6864] hci_chan_del+0x14f/0x190 [ 1177.013172][ T6864] l2cap_conn_del+0x61b/0x9e0 [ 1177.017820][ T6864] ? l2cap_conn_del+0x9e0/0x9e0 [ 1177.022652][ T6864] l2cap_disconn_cfm+0x85/0xa0 [ 1177.027388][ T6864] hci_conn_hash_flush+0x114/0x220 [ 1177.032473][ T6864] hci_dev_do_close+0x5c6/0x1080 [ 1177.037383][ T6864] ? hci_dev_open+0x350/0x350 [ 1177.042031][ T6864] ? do_raw_read_unlock+0x70/0x70 [ 1177.047034][ T6864] ? try_to_grab_pending.part.0+0x7d0/0x7d0 [ 1177.052901][ T6864] hci_unregister_dev+0x1bd/0xe30 [ 1177.057899][ T6864] ? fcntl_setlk+0xf60/0xf60 [ 1177.062460][ T6864] ? lock_is_held_type+0xbb/0xf0 [ 1177.067369][ T6864] vhci_release+0x70/0xe0 [ 1177.071671][ T6864] __fput+0x285/0x920 [ 1177.075627][ T6864] ? vhci_close_dev+0x50/0x50 [ 1177.080280][ T6864] task_work_run+0xdd/0x190 [ 1177.084755][ T6864] do_exit+0xb7d/0x29f0 [ 1177.088884][ T6864] ? mm_update_next_owner+0x7a0/0x7a0 [ 1177.094251][ T6864] ? vfs_write+0x62b/0x730 [ 1177.098642][ T6864] ? vfs_write+0x1b0/0x730 [ 1177.103141][ T6864] ? lock_is_held_type+0xbb/0xf0 [ 1177.108052][ T6864] do_group_exit+0x125/0x310 [ 1177.112617][ T6864] __x64_sys_exit_group+0x3a/0x50 [ 1177.117616][ T6864] do_syscall_64+0x2d/0x70 [ 1177.122007][ T6864] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1177.127869][ T6864] RIP: 0033:0x45ccd9 [ 1177.131731][ T6864] Code: Bad RIP value. [ 1177.135766][ T6864] RSP: 002b:00007fff6e430db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 1177.144159][ T6864] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000045ccd9 [ 1177.152102][ T6864] RDX: 0000000000416731 RSI: 0000000000ca85f0 RDI: 0000000000000043 [ 1177.160044][ T6864] RBP: 00000000004c2963 R08: 000000000000000b R09: 0000000000000000 [ 1177.167986][ T6864] R10: 00000000016f2940 R11: 0000000000000246 R12: 0000000000000003 [ 1177.175948][ T6864] R13: 00007fff6e430f00 R14: 000000000011f395 R15: 00007fff6e430f10 [ 1177.185232][ T6864] Kernel Offset: disabled [ 1177.189549][ T6864] Rebooting in 86400 seconds..