[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.40' (ECDSA) to the list of known hosts. 2020/11/20 09:39:44 parsed 1 programs 2020/11/20 09:39:44 executed programs: 0 syzkaller login: [ 237.047643] IPVS: ftp: loaded support on port[0] = 21 [ 237.157326] chnl_net:caif_netlink_parms(): no params data found [ 237.252832] bridge0: port 1(bridge_slave_0) entered blocking state [ 237.259888] bridge0: port 1(bridge_slave_0) entered disabled state [ 237.267592] device bridge_slave_0 entered promiscuous mode [ 237.274949] bridge0: port 2(bridge_slave_1) entered blocking state [ 237.281786] bridge0: port 2(bridge_slave_1) entered disabled state [ 237.289218] device bridge_slave_1 entered promiscuous mode [ 237.306720] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 237.315462] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 237.334200] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 237.341854] team0: Port device team_slave_0 added [ 237.347682] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 237.355460] team0: Port device team_slave_1 added [ 237.372688] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 237.379169] 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. [ 237.404743] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 237.417449] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 237.423758] 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. [ 237.449934] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 237.460593] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 237.468469] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 237.488821] device hsr_slave_0 entered promiscuous mode [ 237.494584] device hsr_slave_1 entered promiscuous mode [ 237.501019] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 237.508459] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 237.579218] bridge0: port 2(bridge_slave_1) entered blocking state [ 237.585822] bridge0: port 2(bridge_slave_1) entered forwarding state [ 237.593262] bridge0: port 1(bridge_slave_0) entered blocking state [ 237.599724] bridge0: port 1(bridge_slave_0) entered forwarding state [ 237.630431] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 237.637910] 8021q: adding VLAN 0 to HW filter on device bond0 [ 237.645799] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 237.654906] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 237.663982] bridge0: port 1(bridge_slave_0) entered disabled state [ 237.672142] bridge0: port 2(bridge_slave_1) entered disabled state [ 237.679655] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 237.690870] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 237.697131] 8021q: adding VLAN 0 to HW filter on device team0 [ 237.707447] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 237.715515] bridge0: port 1(bridge_slave_0) entered blocking state [ 237.721978] bridge0: port 1(bridge_slave_0) entered forwarding state [ 237.737110] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 237.745055] bridge0: port 2(bridge_slave_1) entered blocking state [ 237.751519] bridge0: port 2(bridge_slave_1) entered forwarding state [ 237.761719] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 237.769973] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 237.780275] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 237.792514] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 237.803009] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 237.812777] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 237.819046] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 237.833374] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 237.841015] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 237.848310] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 237.859323] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 237.872330] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 237.882477] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 237.913717] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 237.921451] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 237.928393] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 237.939424] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 237.947508] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 237.954386] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 237.964128] device veth0_vlan entered promiscuous mode [ 237.973860] device veth1_vlan entered promiscuous mode [ 237.980095] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 237.988680] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 238.001173] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 238.010499] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 238.018883] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 238.026360] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 238.035315] device veth0_macvtap entered promiscuous mode [ 238.042130] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 238.051621] device veth1_macvtap entered promiscuous mode [ 238.060461] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 238.069811] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 238.079994] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 238.087276] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 238.095541] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 238.105828] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 238.112928] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 238.228859] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 238.236160] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 238.243983] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 238.261140] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 238.275436] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 238.283111] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 238.291069] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 238.299115] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 239.086616] Bluetooth: hci0: command 0x0409 tx timeout 2020/11/20 09:39:49 executed programs: 65 [ 241.166315] Bluetooth: hci0: command 0x041b tx timeout [ 243.245503] Bluetooth: hci0: command 0x040f tx timeout [ 245.325791] Bluetooth: hci0: command 0x0419 tx timeout [ 245.982741] ================================================================== [ 245.990296] BUG: KASAN: use-after-free in __lock_acquire+0x2cb4/0x3ff0 [ 245.996965] Read of size 8 at addr ffff8880b2b70168 by task loop0/9303 [ 246.003607] [ 246.005229] CPU: 1 PID: 9303 Comm: loop0 Not tainted 4.19.158-syzkaller #0 [ 246.012235] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 246.021571] Call Trace: [ 246.024197] dump_stack+0x1fc/0x2fe [ 246.027845] print_address_description.cold+0x54/0x219 [ 246.033106] kasan_report_error.cold+0x8a/0x1c7 [ 246.037772] ? __lock_acquire+0x2cb4/0x3ff0 [ 246.042080] __asan_report_load8_noabort+0x88/0x90 [ 246.047000] ? __lock_acquire+0x2cb4/0x3ff0 [ 246.051306] __lock_acquire+0x2cb4/0x3ff0 [ 246.055873] ? trace_hardirqs_off+0x64/0x200 [ 246.060265] ? __kasan_slab_free+0x186/0x1f0 [ 246.064654] ? kmem_cache_free+0x7f/0x260 [ 246.068817] ? mempool_free+0xe3/0x370 [ 246.072729] ? bio_free+0xee/0x140 [ 246.076253] ? mark_held_locks+0xf0/0xf0 [ 246.080323] ? blk_update_request+0x30f/0xaf0 [ 246.084866] ? blk_mq_end_request+0x4a/0x340 [ 246.089338] ? lo_complete_rq+0x201/0x2d0 [ 246.093483] ? blk_mq_complete_request+0x472/0x660 [ 246.098403] ? loop_queue_work+0x274/0x20c0 [ 246.102748] ? kthread_worker_fn+0x292/0x730 [ 246.107139] ? kthread+0x33f/0x460 [ 246.110700] ? ret_from_fork+0x24/0x30 [ 246.114602] ? debug_check_no_obj_freed+0x201/0x482 [ 246.119604] ? lock_downgrade+0x720/0x720 [ 246.123732] ? lock_acquire+0x170/0x3c0 [ 246.127708] lock_acquire+0x170/0x3c0 [ 246.131498] ? __wake_up_common_lock+0xb0/0x170 [ 246.136221] _raw_spin_lock_irqsave+0x8c/0xc0 [ 246.140706] ? __wake_up_common_lock+0xb0/0x170 [ 246.145357] __wake_up_common_lock+0xb0/0x170 [ 246.149849] ? __wake_up_common+0x650/0x650 [ 246.154157] ? _raw_spin_unlock_irqrestore+0xa3/0xe0 [ 246.159279] lbmIODone+0x44b/0xf40 [ 246.162804] ? lock_downgrade+0x720/0x720 [ 246.166932] ? lock_acquire+0x170/0x3c0 [ 246.170970] ? scale_cookie_change.isra.0+0x380/0x380 [ 246.176141] ? lbmFree+0x100/0x100 [ 246.179664] bio_endio+0x471/0x810 [ 246.183212] blk_update_request+0x30f/0xaf0 [ 246.187523] blk_mq_end_request+0x4a/0x340 [ 246.191741] lo_complete_rq+0x201/0x2d0 [ 246.195698] blk_mq_complete_request+0x472/0x660 [ 246.200436] loop_queue_work+0x274/0x20c0 [ 246.204620] ? finish_task_switch+0x1db/0x780 [ 246.209098] ? lo_fallocate.isra.0+0x170/0x170 [ 246.213661] ? kthread_worker_fn+0x217/0x730 [ 246.218067] ? kthread_worker_fn+0x3e4/0x730 [ 246.222457] ? _raw_spin_unlock_irq+0x24/0x80 [ 246.226934] kthread_worker_fn+0x292/0x730 [ 246.231153] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 246.235716] ? __kthread_init_worker+0xf0/0xf0 [ 246.240280] ? __kthread_parkme+0x133/0x1e0 [ 246.244584] ? loop_info64_to_compat+0x5e0/0x5e0 [ 246.249322] kthread+0x33f/0x460 [ 246.252669] ? kthread_park+0x180/0x180 [ 246.256637] ret_from_fork+0x24/0x30 [ 246.260332] [ 246.261944] Allocated by task 9301: [ 246.265555] kmem_cache_alloc_trace+0x12f/0x380 [ 246.270211] lmLogInit+0x301/0x13d0 [ 246.273817] lmLogOpen+0x718/0x11e0 [ 246.277475] jfs_mount_rw+0x286/0x4b0 [ 246.281259] jfs_fill_super+0x814/0xb50 [ 246.285272] mount_bdev+0x2fc/0x3b0 [ 246.288882] mount_fs+0xa3/0x30c [ 246.292273] vfs_kern_mount.part.0+0x68/0x470 [ 246.296748] do_mount+0x113c/0x2f10 [ 246.300357] ksys_mount+0xcf/0x130 [ 246.303878] __x64_sys_mount+0xba/0x150 [ 246.307849] do_syscall_64+0xf9/0x620 [ 246.311646] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 246.316809] [ 246.318415] Freed by task 9301: [ 246.321674] kfree+0xcc/0x210 [ 246.324775] lmLogInit+0xf85/0x13d0 [ 246.328386] lmLogOpen+0x718/0x11e0 [ 246.331994] jfs_mount_rw+0x286/0x4b0 [ 246.335776] jfs_fill_super+0x814/0xb50 [ 246.339762] mount_bdev+0x2fc/0x3b0 [ 246.343381] mount_fs+0xa3/0x30c [ 246.346742] vfs_kern_mount.part.0+0x68/0x470 [ 246.351236] do_mount+0x113c/0x2f10 [ 246.354859] ksys_mount+0xcf/0x130 [ 246.358389] __x64_sys_mount+0xba/0x150 [ 246.362352] do_syscall_64+0xf9/0x620 [ 246.366152] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 246.371350] [ 246.372965] The buggy address belongs to the object at ffff8880b2b70100 [ 246.372965] which belongs to the cache kmalloc-192 of size 192 [ 246.385618] The buggy address is located 104 bytes inside of [ 246.385618] 192-byte region [ffff8880b2b70100, ffff8880b2b701c0) [ 246.397567] The buggy address belongs to the page: [ 246.402511] page:ffffea0002cadc00 count:1 mapcount:0 mapping:ffff88813bff0040 index:0x0 [ 246.410668] flags: 0xfff00000000100(slab) [ 246.414822] raw: 00fff00000000100 ffffea0002cad888 ffffea0002c14008 ffff88813bff0040 [ 246.422705] raw: 0000000000000000 ffff8880b2b70000 0000000100000010 0000000000000000 [ 246.430576] page dumped because: kasan: bad access detected [ 246.436570] [ 246.438408] Memory state around the buggy address: [ 246.443335] ffff8880b2b70000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 246.450706] ffff8880b2b70080: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 246.458163] >ffff8880b2b70100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 246.465518] ^ [ 246.472254] ffff8880b2b70180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 246.479605] ffff8880b2b70200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 246.487089] ================================================================== [ 246.494429] Disabling lock debugging due to kernel taint [ 246.499858] Kernel panic - not syncing: panic_on_warn set ... [ 246.499858] [ 246.507342] CPU: 1 PID: 9303 Comm: loop0 Tainted: G B 4.19.158-syzkaller #0 [ 246.515742] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 246.525089] Call Trace: [ 246.527669] dump_stack+0x1fc/0x2fe [ 246.531337] panic+0x26a/0x50e [ 246.534515] ? __warn_printk+0xf3/0xf3 [ 246.538385] ? lock_downgrade+0x720/0x720 [ 246.542603] ? print_shadow_for_address+0xb8/0x114 [ 246.547653] ? trace_hardirqs_off+0x64/0x200 [ 246.552050] kasan_end_report+0x43/0x49 [ 246.556035] kasan_report_error.cold+0xa7/0x1c7 [ 246.560697] ? __lock_acquire+0x2cb4/0x3ff0 [ 246.565022] __asan_report_load8_noabort+0x88/0x90 [ 246.570069] ? __lock_acquire+0x2cb4/0x3ff0 [ 246.574379] __lock_acquire+0x2cb4/0x3ff0 [ 246.578515] ? trace_hardirqs_off+0x64/0x200 [ 246.582913] ? __kasan_slab_free+0x186/0x1f0 [ 246.587305] ? kmem_cache_free+0x7f/0x260 [ 246.591433] ? mempool_free+0xe3/0x370 [ 246.595305] ? bio_free+0xee/0x140 [ 246.598843] ? mark_held_locks+0xf0/0xf0 [ 246.602884] ? blk_update_request+0x30f/0xaf0 [ 246.607376] ? blk_mq_end_request+0x4a/0x340 [ 246.611791] ? lo_complete_rq+0x201/0x2d0 [ 246.615924] ? blk_mq_complete_request+0x472/0x660 [ 246.620840] ? loop_queue_work+0x274/0x20c0 [ 246.625145] ? kthread_worker_fn+0x292/0x730 [ 246.629536] ? kthread+0x33f/0x460 [ 246.633073] ? ret_from_fork+0x24/0x30 [ 246.636948] ? debug_check_no_obj_freed+0x201/0x482 [ 246.641948] ? lock_downgrade+0x720/0x720 [ 246.646076] ? lock_acquire+0x170/0x3c0 [ 246.650030] lock_acquire+0x170/0x3c0 [ 246.653816] ? __wake_up_common_lock+0xb0/0x170 [ 246.658477] _raw_spin_lock_irqsave+0x8c/0xc0 [ 246.662954] ? __wake_up_common_lock+0xb0/0x170 [ 246.667606] __wake_up_common_lock+0xb0/0x170 [ 246.672082] ? __wake_up_common+0x650/0x650 [ 246.676403] ? _raw_spin_unlock_irqrestore+0xa3/0xe0 [ 246.681486] lbmIODone+0x44b/0xf40 [ 246.685008] ? lock_downgrade+0x720/0x720 [ 246.689831] ? lock_acquire+0x170/0x3c0 [ 246.693805] ? scale_cookie_change.isra.0+0x380/0x380 [ 246.698976] ? lbmFree+0x100/0x100 [ 246.702499] bio_endio+0x471/0x810 [ 246.706023] blk_update_request+0x30f/0xaf0 [ 246.710332] blk_mq_end_request+0x4a/0x340 [ 246.714567] lo_complete_rq+0x201/0x2d0 [ 246.718525] blk_mq_complete_request+0x472/0x660 [ 246.723262] loop_queue_work+0x274/0x20c0 [ 246.727401] ? finish_task_switch+0x1db/0x780 [ 246.731878] ? lo_fallocate.isra.0+0x170/0x170 [ 246.736441] ? kthread_worker_fn+0x217/0x730 [ 246.740834] ? kthread_worker_fn+0x3e4/0x730 [ 246.745226] ? _raw_spin_unlock_irq+0x24/0x80 [ 246.749717] kthread_worker_fn+0x292/0x730 [ 246.753951] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 246.758527] ? __kthread_init_worker+0xf0/0xf0 [ 246.763089] ? __kthread_parkme+0x133/0x1e0 [ 246.767393] ? loop_info64_to_compat+0x5e0/0x5e0 [ 246.772145] kthread+0x33f/0x460 [ 246.775491] ? kthread_park+0x180/0x180 [ 246.779444] ret_from_fork+0x24/0x30 [ 246.783655] Kernel Offset: disabled [ 246.787273] Rebooting in 86400 seconds..