[ 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 '10.128.1.32' (ECDSA) to the list of known hosts. 2020/03/28 20:14:45 parsed 1 programs 2020/03/28 20:14:47 executed programs: 0 syzkaller login: [ 58.301674][ T7105] IPVS: ftp: loaded support on port[0] = 21 [ 58.392876][ T7105] chnl_net:caif_netlink_parms(): no params data found [ 58.443035][ T7105] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.451684][ T7105] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.461135][ T7105] device bridge_slave_0 entered promiscuous mode [ 58.470144][ T7105] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.477410][ T7105] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.485322][ T7105] device bridge_slave_1 entered promiscuous mode [ 58.505584][ T7105] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.517494][ T7105] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.539731][ T7105] team0: Port device team_slave_0 added [ 58.547493][ T7105] team0: Port device team_slave_1 added [ 58.565463][ T7105] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 58.572618][ T7105] 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. [ 58.598829][ T7105] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 58.611785][ T7105] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 58.619152][ T7105] 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. [ 58.645276][ T7105] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 58.708542][ T7105] device hsr_slave_0 entered promiscuous mode [ 58.746045][ T7105] device hsr_slave_1 entered promiscuous mode [ 58.892239][ T7105] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 58.948950][ T7105] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 59.008405][ T7105] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 59.068623][ T7105] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 59.121911][ T7105] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.129175][ T7105] bridge0: port 2(bridge_slave_1) entered forwarding state [ 59.137225][ T7105] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.144308][ T7105] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.190677][ T7105] 8021q: adding VLAN 0 to HW filter on device bond0 [ 59.205259][ T2707] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 59.216835][ T2707] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.224720][ T2707] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.233635][ T2707] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 59.247910][ T7105] 8021q: adding VLAN 0 to HW filter on device team0 [ 59.259098][ T2758] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 59.267994][ T2758] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.275084][ T2758] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.297193][ T2758] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 59.307600][ T2758] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.314655][ T2758] bridge0: port 2(bridge_slave_1) entered forwarding state [ 59.323597][ T2758] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 59.333599][ T2758] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 59.345298][ T2707] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 59.362651][ T7105] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 59.375810][ T7105] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 59.389285][ T2758] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 59.398348][ T2758] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 59.407677][ T2758] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 59.426367][ T2707] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 59.433923][ T2707] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 59.448668][ T7105] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 59.473377][ T2707] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 59.482537][ T2707] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 59.503419][ T7105] device veth0_vlan entered promiscuous mode [ 59.510947][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 59.521147][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 59.531393][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 59.541429][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 59.554422][ T7105] device veth1_vlan entered promiscuous mode [ 59.576249][ T2758] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 59.584319][ T2758] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 59.592737][ T2758] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 59.601670][ T2758] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 59.613375][ T7105] device veth0_macvtap entered promiscuous mode [ 59.624397][ T7105] device veth1_macvtap entered promiscuous mode [ 59.643251][ T7105] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 59.650918][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 59.660311][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 59.668977][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 59.678167][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 59.693764][ T7105] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 59.701832][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 59.712313][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 62.123367][ T7563] ================================================================== [ 62.131749][ T7563] BUG: KASAN: use-after-free in __list_add_valid+0x93/0xa0 [ 62.139052][ T7563] Read of size 8 at addr ffff8880a648e1e0 by task syz-executor.0/7563 [ 62.147200][ T7563] [ 62.149539][ T7563] CPU: 1 PID: 7563 Comm: syz-executor.0 Not tainted 5.6.0-rc7-syzkaller #0 [ 62.158227][ T7563] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.168288][ T7563] Call Trace: [ 62.171592][ T7563] dump_stack+0x188/0x20d [ 62.176053][ T7563] ? __list_add_valid+0x93/0xa0 [ 62.180901][ T7563] ? __list_add_valid+0x93/0xa0 [ 62.185747][ T7563] print_address_description.constprop.0.cold+0xd3/0x315 [ 62.192762][ T7563] ? __list_add_valid+0x93/0xa0 [ 62.197611][ T7563] ? __list_add_valid+0x93/0xa0 [ 62.202459][ T7563] __kasan_report.cold+0x1a/0x32 [ 62.207405][ T7563] ? __list_add_valid+0x93/0xa0 [ 62.212275][ T7563] kasan_report+0xe/0x20 [ 62.216515][ T7563] __list_add_valid+0x93/0xa0 [ 62.221178][ T7563] rdma_listen+0x681/0x910 [ 62.225592][ T7563] ucma_listen+0x14d/0x1c0 [ 62.230115][ T7563] ? ucma_notify+0x190/0x190 [ 62.234693][ T7563] ? __might_fault+0x190/0x1d0 [ 62.239500][ T7563] ? _copy_from_user+0x123/0x190 [ 62.244541][ T7563] ? ucma_notify+0x190/0x190 [ 62.249140][ T7563] ucma_write+0x285/0x350 [ 62.253463][ T7563] ? ucma_open+0x270/0x270 [ 62.257888][ T7563] ? security_file_permission+0x8a/0x370 [ 62.263507][ T7563] ? ucma_open+0x270/0x270 [ 62.267907][ T7563] __vfs_write+0x76/0x100 [ 62.272239][ T7563] vfs_write+0x262/0x5c0 [ 62.276490][ T7563] ksys_write+0x1e8/0x250 [ 62.280818][ T7563] ? __ia32_sys_read+0xb0/0xb0 [ 62.285578][ T7563] ? __ia32_sys_clock_settime+0x260/0x260 [ 62.291296][ T7563] ? trace_hardirqs_off_caller+0x55/0x230 [ 62.297008][ T7563] do_syscall_64+0xf6/0x7d0 [ 62.301502][ T7563] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 62.307373][ T7563] RIP: 0033:0x45c849 [ 62.311263][ T7563] 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 [ 62.330970][ T7563] RSP: 002b:00007f2b67bdbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 62.339411][ T7563] RAX: ffffffffffffffda RBX: 00007f2b67bdc6d4 RCX: 000000000045c849 [ 62.347420][ T7563] RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000004 [ 62.355395][ T7563] RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 [ 62.363461][ T7563] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 62.371423][ T7563] R13: 0000000000000cc0 R14: 00000000004cee4e R15: 000000000076bf0c [ 62.381924][ T7563] [ 62.384242][ T7563] Allocated by task 7557: [ 62.388608][ T7563] save_stack+0x1b/0x80 [ 62.392749][ T7563] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 62.398370][ T7563] kmem_cache_alloc_trace+0x153/0x7d0 [ 62.403721][ T7563] __rdma_create_id+0x5b/0x850 [ 62.408497][ T7563] ucma_create_id+0x1cb/0x580 [ 62.413168][ T7563] ucma_write+0x285/0x350 [ 62.417475][ T7563] __vfs_write+0x76/0x100 [ 62.421781][ T7563] vfs_write+0x262/0x5c0 [ 62.426001][ T7563] ksys_write+0x1e8/0x250 [ 62.430316][ T7563] do_syscall_64+0xf6/0x7d0 [ 62.434805][ T7563] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 62.440670][ T7563] [ 62.442974][ T7563] Freed by task 7556: [ 62.446961][ T7563] save_stack+0x1b/0x80 [ 62.451093][ T7563] __kasan_slab_free+0xf7/0x140 [ 62.455937][ T7563] kfree+0x109/0x2b0 [ 62.459811][ T7563] ucma_close+0x10b/0x300 [ 62.464114][ T7563] __fput+0x2da/0x850 [ 62.468087][ T7563] task_work_run+0x13f/0x1b0 [ 62.472656][ T7563] exit_to_usermode_loop+0x2fa/0x360 [ 62.477919][ T7563] do_syscall_64+0x6b1/0x7d0 [ 62.482486][ T7563] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 62.488349][ T7563] [ 62.490673][ T7563] The buggy address belongs to the object at ffff8880a648e000 [ 62.490673][ T7563] which belongs to the cache kmalloc-2k of size 2048 [ 62.504713][ T7563] The buggy address is located 480 bytes inside of [ 62.504713][ T7563] 2048-byte region [ffff8880a648e000, ffff8880a648e800) [ 62.518083][ T7563] The buggy address belongs to the page: [ 62.523725][ T7563] page:ffffea0002992380 refcount:1 mapcount:0 mapping:ffff8880aa000e00 index:0x0 [ 62.532821][ T7563] flags: 0xfffe0000000200(slab) [ 62.537654][ T7563] raw: 00fffe0000000200 ffffea0002a010c8 ffffea00026b7f48 ffff8880aa000e00 [ 62.546216][ T7563] raw: 0000000000000000 ffff8880a648e000 0000000100000001 0000000000000000 [ 62.554784][ T7563] page dumped because: kasan: bad access detected [ 62.561169][ T7563] [ 62.563477][ T7563] Memory state around the buggy address: [ 62.569136][ T7563] ffff8880a648e080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.577191][ T7563] ffff8880a648e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.585231][ T7563] >ffff8880a648e180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.593275][ T7563] ^ [ 62.600515][ T7563] ffff8880a648e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.608560][ T7563] ffff8880a648e280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.616701][ T7563] ================================================================== [ 62.624741][ T7563] Disabling lock debugging due to kernel taint [ 62.632378][ T7563] Kernel panic - not syncing: panic_on_warn set ... [ 62.638992][ T7563] CPU: 1 PID: 7563 Comm: syz-executor.0 Tainted: G B 5.6.0-rc7-syzkaller #0 [ 62.648962][ T7563] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.659024][ T7563] Call Trace: [ 62.662301][ T7563] dump_stack+0x188/0x20d [ 62.666619][ T7563] panic+0x2e3/0x75c [ 62.670498][ T7563] ? add_taint.cold+0x16/0x16 [ 62.675163][ T7563] ? preempt_schedule_common+0x5e/0xc0 [ 62.680609][ T7563] ? __list_add_valid+0x93/0xa0 [ 62.685438][ T7563] ? ___preempt_schedule+0x16/0x18 [ 62.690543][ T7563] ? trace_hardirqs_on+0x55/0x220 [ 62.695546][ T7563] ? __list_add_valid+0x93/0xa0 [ 62.700386][ T7563] end_report+0x43/0x49 [ 62.704521][ T7563] ? __list_add_valid+0x93/0xa0 [ 62.709361][ T7563] __kasan_report.cold+0xd/0x32 [ 62.714200][ T7563] ? __list_add_valid+0x93/0xa0 [ 62.719096][ T7563] kasan_report+0xe/0x20 [ 62.723333][ T7563] __list_add_valid+0x93/0xa0 [ 62.728179][ T7563] rdma_listen+0x681/0x910 [ 62.732584][ T7563] ucma_listen+0x14d/0x1c0 [ 62.736984][ T7563] ? ucma_notify+0x190/0x190 [ 62.741554][ T7563] ? __might_fault+0x190/0x1d0 [ 62.746310][ T7563] ? _copy_from_user+0x123/0x190 [ 62.751251][ T7563] ? ucma_notify+0x190/0x190 [ 62.755832][ T7563] ucma_write+0x285/0x350 [ 62.760174][ T7563] ? ucma_open+0x270/0x270 [ 62.764588][ T7563] ? security_file_permission+0x8a/0x370 [ 62.770215][ T7563] ? ucma_open+0x270/0x270 [ 62.774610][ T7563] __vfs_write+0x76/0x100 [ 62.778927][ T7563] vfs_write+0x262/0x5c0 [ 62.783175][ T7563] ksys_write+0x1e8/0x250 [ 62.787584][ T7563] ? __ia32_sys_read+0xb0/0xb0 [ 62.792447][ T7563] ? __ia32_sys_clock_settime+0x260/0x260 [ 62.798150][ T7563] ? trace_hardirqs_off_caller+0x55/0x230 [ 62.803855][ T7563] do_syscall_64+0xf6/0x7d0 [ 62.808395][ T7563] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 62.814270][ T7563] RIP: 0033:0x45c849 [ 62.818147][ T7563] 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 [ 62.837733][ T7563] RSP: 002b:00007f2b67bdbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 62.846129][ T7563] RAX: ffffffffffffffda RBX: 00007f2b67bdc6d4 RCX: 000000000045c849 [ 62.854082][ T7563] RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000004 [ 62.862034][ T7563] RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 [ 62.870022][ T7563] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 62.877978][ T7563] R13: 0000000000000cc0 R14: 00000000004cee4e R15: 000000000076bf0c [ 62.887390][ T7563] Kernel Offset: disabled [ 62.891721][ T7563] Rebooting in 86400 seconds..