[ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.59' (ECDSA) to the list of known hosts. 2021/05/26 15:26:13 parsed 1 programs 2021/05/26 15:26:13 executed programs: 0 syzkaller login: [ 1583.594922] IPVS: ftp: loaded support on port[0] = 21 [ 1583.713102] chnl_net:caif_netlink_parms(): no params data found [ 1583.831538] bridge0: port 1(bridge_slave_0) entered blocking state [ 1583.839384] bridge0: port 1(bridge_slave_0) entered disabled state [ 1583.847966] device bridge_slave_0 entered promiscuous mode [ 1583.856565] bridge0: port 2(bridge_slave_1) entered blocking state [ 1583.864210] bridge0: port 2(bridge_slave_1) entered disabled state [ 1583.871830] device bridge_slave_1 entered promiscuous mode [ 1583.890262] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 1583.899648] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 1583.919442] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 1583.927051] team0: Port device team_slave_0 added [ 1583.933556] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 1583.941825] team0: Port device team_slave_1 added [ 1583.959848] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 1583.966635] 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. [ 1583.993750] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 1584.005668] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 1584.012047] 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. [ 1584.039709] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 1584.051816] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 1584.060474] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 1584.082718] device hsr_slave_0 entered promiscuous mode [ 1584.089345] device hsr_slave_1 entered promiscuous mode [ 1584.096405] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 1584.103847] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 1584.176559] bridge0: port 2(bridge_slave_1) entered blocking state [ 1584.183307] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1584.190417] bridge0: port 1(bridge_slave_0) entered blocking state [ 1584.197242] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1584.235896] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 1584.243316] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1584.254201] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 1584.264562] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1584.275392] bridge0: port 1(bridge_slave_0) entered disabled state [ 1584.284323] bridge0: port 2(bridge_slave_1) entered disabled state [ 1584.291705] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1584.303374] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 1584.309807] 8021q: adding VLAN 0 to HW filter on device team0 [ 1584.320590] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1584.329989] bridge0: port 1(bridge_slave_0) entered blocking state [ 1584.336980] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1584.348402] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1584.356708] bridge0: port 2(bridge_slave_1) entered blocking state [ 1584.364374] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1584.383516] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1584.393767] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1584.404235] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1584.417559] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 1584.427682] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 1584.441614] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 1584.449429] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1584.458469] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1584.467283] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 1584.481003] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 1584.489027] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 1584.497439] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 1584.508985] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1584.524153] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 1584.535908] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 1584.569507] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 1584.577918] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 1584.587167] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 1584.598378] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 1584.606986] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 1584.616108] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 1584.626011] device veth0_vlan entered promiscuous mode [ 1584.636675] device veth1_vlan entered promiscuous mode [ 1584.643571] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 1584.655657] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 1584.670460] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 1584.681752] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 1584.690762] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 1584.699832] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 1584.710559] device veth0_macvtap entered promiscuous mode [ 1584.720101] device veth1_macvtap entered promiscuous mode [ 1584.729862] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 1584.743023] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 1584.755883] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready [ 1584.764438] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 1584.772067] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 1584.780746] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 1584.792902] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready [ 1584.799973] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 1584.808219] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 1584.816971] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 1584.948486] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 1584.958483] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1584.967935] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1584.989427] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 1584.999479] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 1585.007024] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1585.016597] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1585.024939] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 1585.623841] Bluetooth: hci0: command 0x0409 tx timeout 2021/05/26 15:26:18 executed programs: 157 [ 1587.702560] Bluetooth: hci0: command 0x041b tx timeout [ 1589.782391] Bluetooth: hci0: command 0x040f tx timeout [ 1591.872196] Bluetooth: hci0: command 0x0419 tx timeout 2021/05/26 15:26:23 executed programs: 668 [ 1596.597862] ================================================================== [ 1596.605484] BUG: KASAN: use-after-free in __lock_acquire+0x2cb4/0x3ff0 [ 1596.612368] Read of size 8 at addr ffff8880a943e460 by task syz-executor.0/8159 [ 1596.619938] [ 1596.621552] CPU: 1 PID: 8159 Comm: syz-executor.0 Not tainted 4.19.192-syzkaller #0 [ 1596.629326] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1596.638925] Call Trace: [ 1596.641536] dump_stack+0x1fc/0x2ef [ 1596.645196] print_address_description.cold+0x54/0x219 [ 1596.650680] kasan_report_error.cold+0x8a/0x1b9 [ 1596.655439] ? __lock_acquire+0x2cb4/0x3ff0 [ 1596.660044] __asan_report_load8_noabort+0x88/0x90 [ 1596.665303] ? __lock_acquire+0x2cb4/0x3ff0 [ 1596.669620] __lock_acquire+0x2cb4/0x3ff0 [ 1596.673964] ? trace_hardirqs_off+0x64/0x200 [ 1596.678370] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 1596.683643] ? debug_object_assert_init+0x242/0x2e0 [ 1596.689042] ? mark_held_locks+0xf0/0xf0 [ 1596.693122] ? debug_object_free+0x380/0x380 [ 1596.697517] ? kfree+0xcc/0x210 [ 1596.700803] ? kfree_const+0x51/0x60 [ 1596.704695] ? kobject_put+0x2b5/0x5d0 [ 1596.708698] ? put_device+0x1c/0x30 [ 1596.712357] ? lock_acquire+0x170/0x3c0 [ 1596.716586] ? l2cap_conn_del+0x39b/0x6e0 [ 1596.720826] ? del_timer+0xc3/0x100 [ 1596.724756] lock_acquire+0x170/0x3c0 [ 1596.728919] ? lock_sock_nested+0x3b/0x110 [ 1596.733350] _raw_spin_lock_bh+0x2f/0x40 [ 1596.737445] ? lock_sock_nested+0x3b/0x110 [ 1596.741791] lock_sock_nested+0x3b/0x110 [ 1596.745858] l2cap_sock_teardown_cb+0xa0/0x6d0 [ 1596.751001] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 1596.755624] l2cap_chan_del+0xbc/0xa50 [ 1596.760416] l2cap_conn_del+0x3a6/0x6e0 [ 1596.765136] ? l2cap_conn_del+0x6e0/0x6e0 [ 1596.769367] l2cap_disconn_cfm+0x98/0xd0 [ 1596.773793] hci_conn_hash_flush+0x127/0x260 [ 1596.778320] hci_dev_do_close+0x659/0xf10 [ 1596.782531] ? hci_dev_open+0x250/0x250 [ 1596.786512] ? hci_unregister_dev+0x71/0x910 [ 1596.791133] hci_unregister_dev+0x18b/0x910 [ 1596.795581] ? vhci_close_dev+0x50/0x50 [ 1596.799968] vhci_release+0x70/0xe0 [ 1596.803839] __fput+0x2ce/0x890 [ 1596.807305] task_work_run+0x148/0x1c0 [ 1596.811199] do_exit+0xbf3/0x2be0 [ 1596.814652] ? lock_downgrade+0x720/0x720 [ 1596.818901] ? mm_update_next_owner+0x650/0x650 [ 1596.823558] ? up_read+0x17/0x110 [ 1596.827266] ? __do_page_fault+0x180/0xd60 [ 1596.831694] do_group_exit+0x125/0x310 [ 1596.835613] __x64_sys_exit_group+0x3a/0x50 [ 1596.840727] do_syscall_64+0xf9/0x620 [ 1596.845038] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1596.850857] RIP: 0033:0x4665d9 [ 1596.854059] Code: 6e 6f 6e 65 75 b4 31 c0 e9 5e ff ff ff 0f 1f 40 00 48 83 f8 05 75 1f 48 8b 4c 24 30 81 39 63 72 61 73 75 96 80 79 04 68 75 90 0b 00 00 00 66 90 e9 35 ff ff ff 48 83 f8 06 75 3d 48 8b 4c 24 [ 1596.873127] RSP: 002b:00007ffc30be9a38 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 1596.880834] RAX: ffffffffffffffda RBX: 0000000000000cc8 RCX: 00000000004665d9 [ 1596.888093] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043 [ 1596.895416] RBP: 0000000000000000 R08: 0000000000000014 R09: 0000000000000cc8 [ 1596.902809] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004bfe04 [ 1596.910089] R13: 0000000000000000 R14: 0000000000000004 R15: 00007ffc30be9c30 [ 1596.917350] [ 1596.918959] Allocated by task 10752: [ 1596.922761] __kmalloc+0x15a/0x3c0 [ 1596.926290] sk_prot_alloc+0x1e2/0x2d0 [ 1596.930214] sk_alloc+0x36/0xec0 [ 1596.933582] l2cap_sock_alloc.constprop.0+0x31/0x210 [ 1596.938677] l2cap_sock_create+0x123/0x1f0 [ 1596.942922] bt_sock_create+0x154/0x2a0 [ 1596.946892] __sock_create+0x3d8/0x740 [ 1596.950777] __sys_socket+0xef/0x200 [ 1596.955456] __x64_sys_socket+0x6f/0xb0 [ 1596.959515] do_syscall_64+0xf9/0x620 [ 1596.963394] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1596.968662] [ 1596.970280] Freed by task 10751: [ 1596.973645] kfree+0xcc/0x210 [ 1596.976748] __sk_destruct+0x684/0x8a0 [ 1596.980706] __sk_free+0x165/0x3b0 [ 1596.984232] sk_free+0x3b/0x50 [ 1596.987515] l2cap_sock_kill.part.0+0x124/0x150 [ 1596.992171] l2cap_sock_release+0x1e6/0x290 [ 1596.996493] __sock_release+0xcd/0x2a0 [ 1597.000411] sock_close+0x15/0x20 [ 1597.004033] __fput+0x2ce/0x890 [ 1597.007326] task_work_run+0x148/0x1c0 [ 1597.011602] exit_to_usermode_loop+0x251/0x2a0 [ 1597.016348] do_syscall_64+0x538/0x620 [ 1597.020253] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1597.025441] [ 1597.027050] The buggy address belongs to the object at ffff8880a943e3c0 [ 1597.027050] which belongs to the cache kmalloc-2048 of size 2048 [ 1597.039987] The buggy address is located 160 bytes inside of [ 1597.039987] 2048-byte region [ffff8880a943e3c0, ffff8880a943ebc0) [ 1597.052124] The buggy address belongs to the page: [ 1597.057085] page:ffffea0002a50f80 count:1 mapcount:0 mapping:ffff88813bff0c40 index:0x0 compound_mapcount: 0 [ 1597.067393] flags: 0xfff00000008100(slab|head) [ 1597.071984] raw: 00fff00000008100 ffffea0002aaf808 ffffea00024a9588 ffff88813bff0c40 [ 1597.079860] raw: 0000000000000000 ffff8880a943e3c0 0000000100000003 0000000000000000 [ 1597.087831] page dumped because: kasan: bad access detected [ 1597.093610] [ 1597.095377] Memory state around the buggy address: [ 1597.100674] ffff8880a943e300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 1597.108127] ffff8880a943e380: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 1597.115664] >ffff8880a943e400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1597.123007] ^ [ 1597.129503] ffff8880a943e480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1597.136855] ffff8880a943e500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1597.144288] ================================================================== [ 1597.151661] Disabling lock debugging due to kernel taint [ 1597.157124] Kernel panic - not syncing: panic_on_warn set ... [ 1597.157124] [ 1597.165378] CPU: 1 PID: 8159 Comm: syz-executor.0 Tainted: G B 4.19.192-syzkaller #0 [ 1597.174672] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1597.184058] Call Trace: [ 1597.186648] dump_stack+0x1fc/0x2ef [ 1597.190277] panic+0x26a/0x50e [ 1597.193708] ? __warn_printk+0xf3/0xf3 [ 1597.197902] ? lock_downgrade+0x720/0x720 [ 1597.202254] ? print_shadow_for_address+0xb8/0x114 [ 1597.207262] ? trace_hardirqs_off+0x64/0x200 [ 1597.212122] kasan_end_report+0x43/0x49 [ 1597.216598] kasan_report_error.cold+0xa7/0x1b9 [ 1597.221277] ? __lock_acquire+0x2cb4/0x3ff0 [ 1597.225767] __asan_report_load8_noabort+0x88/0x90 [ 1597.230798] ? __lock_acquire+0x2cb4/0x3ff0 [ 1597.235120] __lock_acquire+0x2cb4/0x3ff0 [ 1597.239643] ? trace_hardirqs_off+0x64/0x200 [ 1597.244070] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 1597.249174] ? debug_object_assert_init+0x242/0x2e0 [ 1597.254210] ? mark_held_locks+0xf0/0xf0 [ 1597.258285] ? debug_object_free+0x380/0x380 [ 1597.262710] ? kfree+0xcc/0x210 [ 1597.266005] ? kfree_const+0x51/0x60 [ 1597.269727] ? kobject_put+0x2b5/0x5d0 [ 1597.273722] ? put_device+0x1c/0x30 [ 1597.277398] ? lock_acquire+0x170/0x3c0 [ 1597.281385] ? l2cap_conn_del+0x39b/0x6e0 [ 1597.285596] ? del_timer+0xc3/0x100 [ 1597.289214] lock_acquire+0x170/0x3c0 [ 1597.293091] ? lock_sock_nested+0x3b/0x110 [ 1597.297328] _raw_spin_lock_bh+0x2f/0x40 [ 1597.301408] ? lock_sock_nested+0x3b/0x110 [ 1597.305643] lock_sock_nested+0x3b/0x110 [ 1597.309825] l2cap_sock_teardown_cb+0xa0/0x6d0 [ 1597.314561] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 1597.319164] l2cap_chan_del+0xbc/0xa50 [ 1597.323192] l2cap_conn_del+0x3a6/0x6e0 [ 1597.327354] ? l2cap_conn_del+0x6e0/0x6e0 [ 1597.331687] l2cap_disconn_cfm+0x98/0xd0 [ 1597.336425] hci_conn_hash_flush+0x127/0x260 [ 1597.341402] hci_dev_do_close+0x659/0xf10 [ 1597.345749] ? hci_dev_open+0x250/0x250 [ 1597.350203] ? hci_unregister_dev+0x71/0x910 [ 1597.354624] hci_unregister_dev+0x18b/0x910 [ 1597.359342] ? vhci_close_dev+0x50/0x50 [ 1597.363339] vhci_release+0x70/0xe0 [ 1597.366973] __fput+0x2ce/0x890 [ 1597.370444] task_work_run+0x148/0x1c0 [ 1597.374471] do_exit+0xbf3/0x2be0 [ 1597.377920] ? lock_downgrade+0x720/0x720 [ 1597.382193] ? mm_update_next_owner+0x650/0x650 [ 1597.387099] ? up_read+0x17/0x110 [ 1597.390549] ? __do_page_fault+0x180/0xd60 [ 1597.394907] do_group_exit+0x125/0x310 [ 1597.398780] __x64_sys_exit_group+0x3a/0x50 [ 1597.403202] do_syscall_64+0xf9/0x620 [ 1597.407084] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1597.412671] RIP: 0033:0x4665d9 [ 1597.415867] Code: 6e 6f 6e 65 75 b4 31 c0 e9 5e ff ff ff 0f 1f 40 00 48 83 f8 05 75 1f 48 8b 4c 24 30 81 39 63 72 61 73 75 96 80 79 04 68 75 90 0b 00 00 00 66 90 e9 35 ff ff ff 48 83 f8 06 75 3d 48 8b 4c 24 [ 1597.435219] RSP: 002b:00007ffc30be9a38 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 1597.443013] RAX: ffffffffffffffda RBX: 0000000000000cc8 RCX: 00000000004665d9 [ 1597.451647] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043 [ 1597.459024] RBP: 0000000000000000 R08: 0000000000000014 R09: 0000000000000cc8 [ 1597.466555] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004bfe04 [ 1597.473817] R13: 0000000000000000 R14: 0000000000000004 R15: 00007ffc30be9c30 [ 1597.482353] Kernel Offset: disabled [ 1597.486002] Rebooting in 86400 seconds..