[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.113' (ECDSA) to the list of known hosts. 2020/03/30 02:05:42 parsed 1 programs 2020/03/30 02:05:45 executed programs: 0 syzkaller login: [ 61.529511][ T7021] IPVS: ftp: loaded support on port[0] = 21 [ 61.624012][ T7021] chnl_net:caif_netlink_parms(): no params data found [ 61.676075][ T7021] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.684082][ T7021] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.692525][ T7021] device bridge_slave_0 entered promiscuous mode [ 61.701459][ T7021] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.708549][ T7021] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.716692][ T7021] device bridge_slave_1 entered promiscuous mode [ 61.737294][ T7021] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.747985][ T7021] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.771271][ T7021] team0: Port device team_slave_0 added [ 61.778649][ T7021] team0: Port device team_slave_1 added [ 61.795888][ T7021] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 61.802860][ T7021] 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. [ 61.828784][ T7021] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 61.841502][ T7021] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 61.848439][ T7021] 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. [ 61.874493][ T7021] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 61.953758][ T7021] device hsr_slave_0 entered promiscuous mode [ 61.991323][ T7021] device hsr_slave_1 entered promiscuous mode [ 62.135474][ T7021] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 62.193258][ T7021] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 62.233105][ T7021] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 62.273601][ T7021] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 62.345549][ T7021] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.352856][ T7021] bridge0: port 2(bridge_slave_1) entered forwarding state [ 62.360351][ T7021] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.367570][ T7021] bridge0: port 1(bridge_slave_0) entered forwarding state [ 62.415057][ T7021] 8021q: adding VLAN 0 to HW filter on device bond0 [ 62.427376][ T2759] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 62.438444][ T2759] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.446837][ T2759] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.455613][ T2759] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 62.469268][ T7021] 8021q: adding VLAN 0 to HW filter on device team0 [ 62.480326][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 62.489039][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.496157][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 62.507668][ T2759] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 62.516983][ T2759] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.524101][ T2759] bridge0: port 2(bridge_slave_1) entered forwarding state [ 62.544399][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 62.553322][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 62.571120][ T2759] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 62.579472][ T2759] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 62.593331][ T7021] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 62.604715][ T7021] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 62.614089][ T2759] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 62.633224][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 62.641449][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 62.655273][ T7021] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 62.675600][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 62.684901][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 62.705272][ T2759] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 62.713843][ T2759] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 62.728028][ T7021] device veth0_vlan entered promiscuous mode [ 62.735443][ T2759] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 62.743117][ T2759] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 62.757162][ T7021] device veth1_vlan entered promiscuous mode [ 62.779178][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 62.787628][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 62.796238][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 62.805075][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 62.816720][ T7021] device veth0_macvtap entered promiscuous mode [ 62.826213][ T7021] device veth1_macvtap entered promiscuous mode [ 62.844017][ T7021] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 62.851415][ T2759] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 62.859524][ T2759] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 62.867977][ T2759] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 62.876742][ T2759] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 62.892484][ T7021] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 62.900636][ T2759] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 62.909032][ T2759] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 64.078750][ T7349] ================================================================== [ 64.086923][ T7349] BUG: KASAN: use-after-free in __list_add_valid+0x93/0xa0 [ 64.094105][ T7349] Read of size 8 at addr ffff8880a44091e0 by task syz-executor.0/7349 [ 64.102236][ T7349] [ 64.104544][ T7349] CPU: 1 PID: 7349 Comm: syz-executor.0 Not tainted 5.6.0-rc7-syzkaller #0 [ 64.113107][ T7349] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.123135][ T7349] Call Trace: [ 64.126435][ T7349] dump_stack+0x188/0x20d [ 64.130747][ T7349] ? __list_add_valid+0x93/0xa0 [ 64.135579][ T7349] ? __list_add_valid+0x93/0xa0 [ 64.140419][ T7349] print_address_description.constprop.0.cold+0xd3/0x315 [ 64.147423][ T7349] ? __list_add_valid+0x93/0xa0 [ 64.152251][ T7349] ? __list_add_valid+0x93/0xa0 [ 64.157078][ T7349] __kasan_report.cold+0x1a/0x32 [ 64.162058][ T7349] ? __list_add_valid+0x93/0xa0 [ 64.166924][ T7349] kasan_report+0xe/0x20 [ 64.171223][ T7349] __list_add_valid+0x93/0xa0 [ 64.175903][ T7349] rdma_listen+0x681/0x910 [ 64.180312][ T7349] ucma_listen+0x14d/0x1c0 [ 64.184715][ T7349] ? ucma_notify+0x190/0x190 [ 64.189290][ T7349] ? __might_fault+0x190/0x1d0 [ 64.194035][ T7349] ? _copy_from_user+0x123/0x190 [ 64.198970][ T7349] ? ucma_notify+0x190/0x190 [ 64.203635][ T7349] ucma_write+0x285/0x350 [ 64.207946][ T7349] ? ucma_open+0x270/0x270 [ 64.212361][ T7349] ? security_file_permission+0x8a/0x370 [ 64.218024][ T7349] ? ucma_open+0x270/0x270 [ 64.222437][ T7349] __vfs_write+0x76/0x100 [ 64.226763][ T7349] vfs_write+0x262/0x5c0 [ 64.230993][ T7349] ksys_write+0x1e8/0x250 [ 64.235305][ T7349] ? __ia32_sys_read+0xb0/0xb0 [ 64.240091][ T7349] ? __ia32_sys_clock_settime+0x260/0x260 [ 64.245809][ T7349] ? trace_hardirqs_off_caller+0x55/0x230 [ 64.251582][ T7349] do_syscall_64+0xf6/0x7d0 [ 64.256067][ T7349] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.261938][ T7349] RIP: 0033:0x45c849 [ 64.265809][ T7349] Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 64.285401][ T7349] RSP: 002b:00007fe1337a5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 64.293841][ T7349] RAX: ffffffffffffffda RBX: 00007fe1337a66d4 RCX: 000000000045c849 [ 64.301788][ T7349] RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000003 [ 64.309735][ T7349] RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 [ 64.317684][ T7349] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 64.325653][ T7349] R13: 0000000000000cc0 R14: 00000000004cee4e R15: 000000000076bf0c [ 64.333616][ T7349] [ 64.335921][ T7349] Allocated by task 7344: [ 64.340249][ T7349] save_stack+0x1b/0x80 [ 64.344398][ T7349] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 64.350021][ T7349] kmem_cache_alloc_trace+0x153/0x7d0 [ 64.355440][ T7349] __rdma_create_id+0x5b/0x850 [ 64.360189][ T7349] ucma_create_id+0x1cb/0x580 [ 64.364855][ T7349] ucma_write+0x285/0x350 [ 64.369176][ T7349] __vfs_write+0x76/0x100 [ 64.373485][ T7349] vfs_write+0x262/0x5c0 [ 64.377705][ T7349] ksys_write+0x1e8/0x250 [ 64.382016][ T7349] do_syscall_64+0xf6/0x7d0 [ 64.386520][ T7349] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.392390][ T7349] [ 64.394696][ T7349] Freed by task 7344: [ 64.398654][ T7349] save_stack+0x1b/0x80 [ 64.402821][ T7349] __kasan_slab_free+0xf7/0x140 [ 64.407659][ T7349] kfree+0x109/0x2b0 [ 64.411549][ T7349] ucma_close+0x10b/0x300 [ 64.415894][ T7349] __fput+0x2da/0x850 [ 64.419857][ T7349] task_work_run+0x13f/0x1b0 [ 64.424430][ T7349] exit_to_usermode_loop+0x2fa/0x360 [ 64.429760][ T7349] do_syscall_64+0x6b1/0x7d0 [ 64.434370][ T7349] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.440289][ T7349] [ 64.442598][ T7349] The buggy address belongs to the object at ffff8880a4409000 [ 64.442598][ T7349] which belongs to the cache kmalloc-2k of size 2048 [ 64.456626][ T7349] The buggy address is located 480 bytes inside of [ 64.456626][ T7349] 2048-byte region [ffff8880a4409000, ffff8880a4409800) [ 64.469962][ T7349] The buggy address belongs to the page: [ 64.475602][ T7349] page:ffffea0002910240 refcount:1 mapcount:0 mapping:ffff8880aa000e00 index:0x0 [ 64.484697][ T7349] flags: 0xfffe0000000200(slab) [ 64.489552][ T7349] raw: 00fffe0000000200 ffffea0002912488 ffffea00028ea708 ffff8880aa000e00 [ 64.498115][ T7349] raw: 0000000000000000 ffff8880a4409000 0000000100000001 0000000000000000 [ 64.506667][ T7349] page dumped because: kasan: bad access detected [ 64.513049][ T7349] [ 64.515368][ T7349] Memory state around the buggy address: [ 64.520971][ T7349] ffff8880a4409080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.529004][ T7349] ffff8880a4409100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.537055][ T7349] >ffff8880a4409180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.545086][ T7349] ^ [ 64.552326][ T7349] ffff8880a4409200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.560390][ T7349] ffff8880a4409280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.568436][ T7349] ================================================================== [ 64.576470][ T7349] Disabling lock debugging due to kernel taint [ 64.605579][ T7349] Kernel panic - not syncing: panic_on_warn set ... [ 64.612164][ T7349] CPU: 1 PID: 7349 Comm: syz-executor.0 Tainted: G B 5.6.0-rc7-syzkaller #0 [ 64.622105][ T7349] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.632233][ T7349] Call Trace: [ 64.635517][ T7349] dump_stack+0x188/0x20d [ 64.639863][ T7349] panic+0x2e3/0x75c [ 64.643862][ T7349] ? add_taint.cold+0x16/0x16 [ 64.648535][ T7349] ? preempt_schedule_common+0x5e/0xc0 [ 64.653980][ T7349] ? __list_add_valid+0x93/0xa0 [ 64.658810][ T7349] ? ___preempt_schedule+0x16/0x18 [ 64.663911][ T7349] ? trace_hardirqs_on+0x55/0x220 [ 64.668911][ T7349] ? __list_add_valid+0x93/0xa0 [ 64.673747][ T7349] end_report+0x43/0x49 [ 64.677878][ T7349] ? __list_add_valid+0x93/0xa0 [ 64.682701][ T7349] __kasan_report.cold+0xd/0x32 [ 64.687601][ T7349] ? __list_add_valid+0x93/0xa0 [ 64.692430][ T7349] kasan_report+0xe/0x20 [ 64.696649][ T7349] __list_add_valid+0x93/0xa0 [ 64.701338][ T7349] rdma_listen+0x681/0x910 [ 64.705765][ T7349] ucma_listen+0x14d/0x1c0 [ 64.710162][ T7349] ? ucma_notify+0x190/0x190 [ 64.714737][ T7349] ? __might_fault+0x190/0x1d0 [ 64.719474][ T7349] ? _copy_from_user+0x123/0x190 [ 64.724405][ T7349] ? ucma_notify+0x190/0x190 [ 64.728969][ T7349] ucma_write+0x285/0x350 [ 64.733284][ T7349] ? ucma_open+0x270/0x270 [ 64.737709][ T7349] ? security_file_permission+0x8a/0x370 [ 64.743365][ T7349] ? ucma_open+0x270/0x270 [ 64.747760][ T7349] __vfs_write+0x76/0x100 [ 64.752069][ T7349] vfs_write+0x262/0x5c0 [ 64.756290][ T7349] ksys_write+0x1e8/0x250 [ 64.760631][ T7349] ? __ia32_sys_read+0xb0/0xb0 [ 64.765382][ T7349] ? __ia32_sys_clock_settime+0x260/0x260 [ 64.771076][ T7349] ? trace_hardirqs_off_caller+0x55/0x230 [ 64.776770][ T7349] do_syscall_64+0xf6/0x7d0 [ 64.781250][ T7349] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.787125][ T7349] RIP: 0033:0x45c849 [ 64.790994][ T7349] Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 64.810597][ T7349] RSP: 002b:00007fe1337a5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 64.818988][ T7349] RAX: ffffffffffffffda RBX: 00007fe1337a66d4 RCX: 000000000045c849 [ 64.826977][ T7349] RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000003 [ 64.834940][ T7349] RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 [ 64.842884][ T7349] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 64.850848][ T7349] R13: 0000000000000cc0 R14: 00000000004cee4e R15: 000000000076bf0c [ 64.859852][ T7349] Kernel Offset: disabled [ 64.864167][ T7349] Rebooting in 86400 seconds..