[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.61' (ECDSA) to the list of known hosts. 2020/04/02 00:00:50 parsed 1 programs 2020/04/02 00:00:53 executed programs: 0 syzkaller login: [ 59.688962][ T7046] IPVS: ftp: loaded support on port[0] = 21 [ 59.798057][ T7046] chnl_net:caif_netlink_parms(): no params data found [ 59.864445][ T7046] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.872798][ T7046] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.881543][ T7046] device bridge_slave_0 entered promiscuous mode [ 59.891038][ T7046] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.899490][ T7046] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.908159][ T7046] device bridge_slave_1 entered promiscuous mode [ 59.932548][ T7046] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.943657][ T7046] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.965878][ T7046] team0: Port device team_slave_0 added [ 59.974331][ T7046] team0: Port device team_slave_1 added [ 59.991850][ T7046] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 59.998868][ T7046] 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. [ 60.024975][ T7046] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 60.038225][ T7046] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 60.045306][ T7046] 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. [ 60.071285][ T7046] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 60.124633][ T7046] device hsr_slave_0 entered promiscuous mode [ 60.191766][ T7046] device hsr_slave_1 entered promiscuous mode [ 60.314632][ T7046] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 60.373949][ T7046] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 60.444421][ T7046] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 60.493417][ T7046] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 60.545884][ T7046] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.553131][ T7046] bridge0: port 2(bridge_slave_1) entered forwarding state [ 60.560805][ T7046] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.568001][ T7046] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.611632][ T7046] 8021q: adding VLAN 0 to HW filter on device bond0 [ 60.625885][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 60.636338][ T23] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.644900][ T23] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.654356][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 60.666918][ T7046] 8021q: adding VLAN 0 to HW filter on device team0 [ 60.679323][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 60.688786][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.695940][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.723957][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 60.732922][ T23] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.740081][ T23] bridge0: port 2(bridge_slave_1) entered forwarding state [ 60.749041][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 60.758255][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 60.767007][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 60.780130][ T7046] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 60.792350][ T7046] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 60.800586][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 60.810237][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 60.832405][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 60.839970][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 60.854601][ T7046] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 60.878325][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 60.887917][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 60.907862][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 60.917011][ T2716] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 60.927542][ T7046] device veth0_vlan entered promiscuous mode [ 60.934693][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 60.943391][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 60.957701][ T7046] device veth1_vlan entered promiscuous mode [ 60.977202][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 60.986236][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 60.994434][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 61.003253][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 61.014344][ T7046] device veth0_macvtap entered promiscuous mode [ 61.025295][ T7046] device veth1_macvtap entered promiscuous mode [ 61.043566][ T7046] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 61.052598][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 61.060597][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 61.069705][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 61.078831][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 61.092004][ T7046] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 61.099396][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 61.109118][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 61.618138][ T7312] ================================================================== [ 61.626423][ T7312] BUG: KASAN: use-after-free in __list_add_valid+0x93/0xa0 [ 61.633944][ T7312] Read of size 8 at addr ffff8880a4dd51e0 by task syz-executor.0/7312 [ 61.642098][ T7312] [ 61.644436][ T7312] CPU: 1 PID: 7312 Comm: syz-executor.0 Not tainted 5.6.0-syzkaller #0 [ 61.652677][ T7312] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.662738][ T7312] Call Trace: [ 61.666039][ T7312] dump_stack+0x188/0x20d [ 61.670472][ T7312] ? __list_add_valid+0x93/0xa0 [ 61.675332][ T7312] ? __list_add_valid+0x93/0xa0 [ 61.680192][ T7312] print_address_description.constprop.0.cold+0xd3/0x315 [ 61.687232][ T7312] ? __list_add_valid+0x93/0xa0 [ 61.692094][ T7312] ? __list_add_valid+0x93/0xa0 [ 61.696952][ T7312] __kasan_report.cold+0x1a/0x32 [ 61.702021][ T7312] ? __list_add_valid+0x93/0xa0 [ 61.706969][ T7312] kasan_report+0xe/0x20 [ 61.711198][ T7312] __list_add_valid+0x93/0xa0 [ 61.715902][ T7312] rdma_listen+0x681/0x910 [ 61.720301][ T7312] ucma_listen+0x14d/0x1c0 [ 61.724705][ T7312] ? ucma_notify+0x190/0x190 [ 61.729273][ T7312] ? __might_fault+0x190/0x1d0 [ 61.734017][ T7312] ? _copy_from_user+0x13c/0x1a0 [ 61.738932][ T7312] ? ucma_notify+0x190/0x190 [ 61.743510][ T7312] ucma_write+0x285/0x350 [ 61.747816][ T7312] ? ucma_open+0x270/0x270 [ 61.752330][ T7312] ? security_file_permission+0x8a/0x380 [ 61.757959][ T7312] ? ucma_open+0x270/0x270 [ 61.762361][ T7312] __vfs_write+0x76/0x100 [ 61.766672][ T7312] vfs_write+0x268/0x5d0 [ 61.770906][ T7312] ksys_write+0x1ee/0x250 [ 61.775228][ T7312] ? __ia32_sys_read+0xb0/0xb0 [ 61.779978][ T7312] ? __x64_sys_clock_gettime32+0x240/0x240 [ 61.785781][ T7312] ? trace_hardirqs_off_caller+0x55/0x230 [ 61.791505][ T7312] do_fast_syscall_32+0x270/0xe90 [ 61.796532][ T7312] entry_SYSENTER_compat+0x70/0x7f [ 61.801639][ T7312] [ 61.803967][ T7312] Allocated by task 7304: [ 61.808306][ T7312] save_stack+0x1b/0x80 [ 61.812458][ T7312] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 61.818070][ T7312] kmem_cache_alloc_trace+0x153/0x7d0 [ 61.823431][ T7312] __rdma_create_id+0x5b/0x850 [ 61.828190][ T7312] ucma_create_id+0x1d1/0x590 [ 61.832844][ T7312] ucma_write+0x285/0x350 [ 61.837149][ T7312] __vfs_write+0x76/0x100 [ 61.841455][ T7312] vfs_write+0x268/0x5d0 [ 61.845697][ T7312] ksys_write+0x1ee/0x250 [ 61.850008][ T7312] do_fast_syscall_32+0x270/0xe90 [ 61.855120][ T7312] entry_SYSENTER_compat+0x70/0x7f [ 61.860238][ T7312] [ 61.862553][ T7312] Freed by task 7306: [ 61.866548][ T7312] save_stack+0x1b/0x80 [ 61.870818][ T7312] __kasan_slab_free+0xf7/0x140 [ 61.875662][ T7312] kfree+0x109/0x2b0 [ 61.879744][ T7312] ucma_close+0x111/0x300 [ 61.884074][ T7312] __fput+0x2e9/0x860 [ 61.888041][ T7312] task_work_run+0xf4/0x1b0 [ 61.892524][ T7312] get_signal+0x2058/0x24e0 [ 61.897012][ T7312] do_signal+0x81/0x2240 [ 61.901234][ T7312] exit_to_usermode_loop+0x26c/0x360 [ 61.906495][ T7312] do_fast_syscall_32+0xbef/0xe90 [ 61.911508][ T7312] entry_SYSENTER_compat+0x70/0x7f [ 61.916600][ T7312] [ 61.918913][ T7312] The buggy address belongs to the object at ffff8880a4dd5000 [ 61.918913][ T7312] which belongs to the cache kmalloc-2k of size 2048 [ 61.933007][ T7312] The buggy address is located 480 bytes inside of [ 61.933007][ T7312] 2048-byte region [ffff8880a4dd5000, ffff8880a4dd5800) [ 61.946359][ T7312] The buggy address belongs to the page: [ 61.951973][ T7312] page:ffffea0002937540 refcount:1 mapcount:0 mapping:ffff8880aa000e00 index:0x0 [ 61.961065][ T7312] flags: 0xfffe0000000200(slab) [ 61.965913][ T7312] raw: 00fffe0000000200 ffffea0002a19cc8 ffffea0002643448 ffff8880aa000e00 [ 61.974494][ T7312] raw: 0000000000000000 ffff8880a4dd5000 0000000100000001 0000000000000000 [ 61.983244][ T7312] page dumped because: kasan: bad access detected [ 61.989644][ T7312] [ 61.991951][ T7312] Memory state around the buggy address: [ 61.997609][ T7312] ffff8880a4dd5080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.005761][ T7312] ffff8880a4dd5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.013878][ T7312] >ffff8880a4dd5180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.022048][ T7312] ^ [ 62.029227][ T7312] ffff8880a4dd5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.037273][ T7312] ffff8880a4dd5280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.045327][ T7312] ================================================================== [ 62.053363][ T7312] Disabling lock debugging due to kernel taint [ 62.069173][ T7312] Kernel panic - not syncing: panic_on_warn set ... [ 62.075808][ T7312] CPU: 1 PID: 7312 Comm: syz-executor.0 Tainted: G B 5.6.0-syzkaller #0 [ 62.085732][ T7312] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.095781][ T7312] Call Trace: [ 62.099153][ T7312] dump_stack+0x188/0x20d [ 62.103472][ T7312] panic+0x2e3/0x75c [ 62.107380][ T7312] ? add_taint.cold+0x16/0x16 [ 62.112043][ T7312] ? preempt_schedule_common+0x5e/0xc0 [ 62.117488][ T7312] ? __list_add_valid+0x93/0xa0 [ 62.122328][ T7312] ? preempt_schedule_thunk+0x16/0x18 [ 62.127683][ T7312] ? trace_hardirqs_on+0x55/0x220 [ 62.132701][ T7312] ? __list_add_valid+0x93/0xa0 [ 62.137544][ T7312] end_report+0x43/0x49 [ 62.141687][ T7312] ? __list_add_valid+0x93/0xa0 [ 62.146537][ T7312] __kasan_report.cold+0xd/0x32 [ 62.151384][ T7312] ? __list_add_valid+0x93/0xa0 [ 62.156211][ T7312] kasan_report+0xe/0x20 [ 62.160442][ T7312] __list_add_valid+0x93/0xa0 [ 62.165100][ T7312] rdma_listen+0x681/0x910 [ 62.169497][ T7312] ucma_listen+0x14d/0x1c0 [ 62.173902][ T7312] ? ucma_notify+0x190/0x190 [ 62.178489][ T7312] ? __might_fault+0x190/0x1d0 [ 62.183346][ T7312] ? _copy_from_user+0x13c/0x1a0 [ 62.188274][ T7312] ? ucma_notify+0x190/0x190 [ 62.192856][ T7312] ucma_write+0x285/0x350 [ 62.197171][ T7312] ? ucma_open+0x270/0x270 [ 62.201586][ T7312] ? security_file_permission+0x8a/0x380 [ 62.207195][ T7312] ? ucma_open+0x270/0x270 [ 62.212369][ T7312] __vfs_write+0x76/0x100 [ 62.216696][ T7312] vfs_write+0x268/0x5d0 [ 62.221038][ T7312] ksys_write+0x1ee/0x250 [ 62.225348][ T7312] ? __ia32_sys_read+0xb0/0xb0 [ 62.230096][ T7312] ? __x64_sys_clock_gettime32+0x240/0x240 [ 62.235887][ T7312] ? trace_hardirqs_off_caller+0x55/0x230 [ 62.241594][ T7312] do_fast_syscall_32+0x270/0xe90 [ 62.246607][ T7312] entry_SYSENTER_compat+0x70/0x7f [ 62.253335][ T7312] Kernel Offset: disabled [ 62.257805][ T7312] Rebooting in 86400 seconds..