[ 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 '10.128.0.71' (ECDSA) to the list of known hosts. 2020/04/03 05:31:08 parsed 1 programs 2020/04/03 05:31:10 executed programs: 0 syzkaller login: [ 42.173153] audit: type=1400 audit(1585891870.977:8): avc: denied { execmem } for pid=6443 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 42.203313] IPVS: ftp: loaded support on port[0] = 21 [ 42.292410] chnl_net:caif_netlink_parms(): no params data found [ 42.384703] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.391485] bridge0: port 1(bridge_slave_0) entered disabled state [ 42.398614] device bridge_slave_0 entered promiscuous mode [ 42.407932] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.414682] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.422162] device bridge_slave_1 entered promiscuous mode [ 42.440465] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 42.449300] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 42.469109] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 42.476570] team0: Port device team_slave_0 added [ 42.482661] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 42.489946] team0: Port device team_slave_1 added [ 42.506475] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 42.512812] 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. [ 42.538385] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 42.551161] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 42.557407] 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. [ 42.582638] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 42.593319] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 42.600814] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 42.653854] device hsr_slave_0 entered promiscuous mode [ 42.690928] device hsr_slave_1 entered promiscuous mode [ 42.731617] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 42.738809] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 42.808180] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.814766] bridge0: port 2(bridge_slave_1) entered forwarding state [ 42.821685] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.828058] bridge0: port 1(bridge_slave_0) entered forwarding state [ 42.866428] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 42.872892] 8021q: adding VLAN 0 to HW filter on device bond0 [ 42.882521] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 42.891662] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 42.900079] bridge0: port 1(bridge_slave_0) entered disabled state [ 42.918139] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.926761] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 42.937994] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 42.944187] 8021q: adding VLAN 0 to HW filter on device team0 [ 42.954535] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 42.962318] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.968681] bridge0: port 1(bridge_slave_0) entered forwarding state [ 42.981867] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 42.989516] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.995972] bridge0: port 2(bridge_slave_1) entered forwarding state [ 43.009348] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.018048] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 43.028608] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.039937] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 43.052015] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 43.060834] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 43.066900] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 43.080898] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 43.088809] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 43.096734] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 43.107691] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 43.121028] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 43.131341] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 43.168681] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 43.176338] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 43.183903] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 43.194048] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 43.201860] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 43.208710] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 43.217901] device veth0_vlan entered promiscuous mode [ 43.227273] device veth1_vlan entered promiscuous mode [ 43.233602] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 43.242805] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 43.256190] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 43.266255] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 43.273817] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 43.281618] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 43.292831] device veth0_macvtap entered promiscuous mode [ 43.301613] device veth1_macvtap entered promiscuous mode [ 43.310534] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 43.319606] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 43.329903] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready [ 43.337769] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 43.344767] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 43.352766] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 43.363478] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready [ 43.370606] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 43.377130] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 43.385820] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 43.556377] ================================================================== [ 43.563884] BUG: KASAN: use-after-free in __list_add_valid+0x93/0xa0 [ 43.570503] Read of size 8 at addr ffff888091fba260 by task syz-executor.0/6676 [ 43.578062] [ 43.579683] CPU: 1 PID: 6676 Comm: syz-executor.0 Not tainted 4.19.114-syzkaller #0 [ 43.587544] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.596996] Call Trace: [ 43.599582] dump_stack+0x188/0x20d [ 43.603205] ? __list_add_valid+0x93/0xa0 [ 43.607502] print_address_description.cold+0x7c/0x212 [ 43.612850] ? __list_add_valid+0x93/0xa0 [ 43.617005] kasan_report.cold+0x88/0x2b9 [ 43.621154] __list_add_valid+0x93/0xa0 [ 43.625125] rdma_listen+0x609/0x880 [ 43.628835] ucma_listen+0x14d/0x1c0 [ 43.632665] ? ucma_notify+0x190/0x190 [ 43.636685] ? __might_fault+0x192/0x1d0 [ 43.640790] ? _copy_from_user+0xd2/0x140 [ 43.644973] ? ucma_notify+0x190/0x190 [ 43.648896] ucma_write+0x285/0x350 [ 43.652549] ? ucma_open+0x280/0x280 [ 43.656258] ? __fget+0x319/0x510 [ 43.659707] __vfs_write+0xf7/0x760 [ 43.663324] ? ucma_open+0x280/0x280 [ 43.667034] ? kernel_read+0x110/0x110 [ 43.671219] ? __inode_security_revalidate+0xd3/0x120 [ 43.676448] ? avc_policy_seqno+0x9/0x70 [ 43.680619] ? selinux_file_permission+0x87/0x520 [ 43.685492] ? security_file_permission+0x84/0x220 [ 43.690423] vfs_write+0x206/0x550 [ 43.693957] ksys_write+0x12b/0x2a0 [ 43.697575] ? __ia32_sys_read+0xb0/0xb0 [ 43.701633] ? __ia32_sys_clock_settime+0x260/0x260 [ 43.706649] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 43.711402] ? trace_hardirqs_off_caller+0x55/0x210 [ 43.716418] ? do_syscall_64+0x21/0x620 [ 43.720388] do_syscall_64+0xf9/0x620 [ 43.724187] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 43.729371] RIP: 0033:0x45c849 [ 43.732638] 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 [ 43.751907] RSP: 002b:00007f468370ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 43.759611] RAX: ffffffffffffffda RBX: 00007f468370f6d4 RCX: 000000000045c849 [ 43.766876] RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000004 [ 43.774260] RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 [ 43.781722] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 43.788992] R13: 0000000000000cc0 R14: 00000000004cee4e R15: 000000000076bf0c [ 43.796265] [ 43.797884] Allocated by task 6669: [ 43.801507] kasan_kmalloc+0xbf/0xe0 [ 43.805342] kmem_cache_alloc_trace+0x14d/0x7a0 [ 43.810135] __rdma_create_id+0x5b/0x630 [ 43.814194] ucma_create_id+0x1cb/0x5a0 [ 43.818169] ucma_write+0x285/0x350 [ 43.821791] __vfs_write+0xf7/0x760 [ 43.825480] vfs_write+0x206/0x550 [ 43.829014] ksys_write+0x12b/0x2a0 [ 43.832698] do_syscall_64+0xf9/0x620 [ 43.836490] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 43.841733] [ 43.843351] Freed by task 6668: [ 43.846626] __kasan_slab_free+0xf7/0x140 [ 43.850765] kfree+0xce/0x220 [ 43.853862] ucma_close+0x10b/0x320 [ 43.857477] __fput+0x2cd/0x890 [ 43.860854] task_work_run+0x13f/0x1b0 [ 43.864738] exit_to_usermode_loop+0x25a/0x2b0 [ 43.869310] do_syscall_64+0x538/0x620 [ 43.873191] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 43.878364] [ 43.879990] The buggy address belongs to the object at ffff888091fba080 [ 43.879990] which belongs to the cache kmalloc-2048 of size 2048 [ 43.892988] The buggy address is located 480 bytes inside of [ 43.892988] 2048-byte region [ffff888091fba080, ffff888091fba880) [ 43.904957] The buggy address belongs to the page: [ 43.909889] page:ffffea000247ee80 count:1 mapcount:0 mapping:ffff88812c3dcc40 index:0x0 compound_mapcount: 0 [ 43.919902] flags: 0xfffe0000008100(slab|head) [ 43.924582] raw: 00fffe0000008100 ffffea0002112108 ffffea000284e308 ffff88812c3dcc40 [ 43.932455] raw: 0000000000000000 ffff888091fba080 0000000100000003 0000000000000000 [ 43.940439] page dumped because: kasan: bad access detected [ 43.946660] [ 43.948279] Memory state around the buggy address: [ 43.953204] ffff888091fba100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.960681] ffff888091fba180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.968032] >ffff888091fba200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.975381] ^ [ 43.981955] ffff888091fba280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.989350] ffff888091fba300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.996699] ================================================================== [ 44.004046] Disabling lock debugging due to kernel taint [ 44.017103] Kernel panic - not syncing: panic_on_warn set ... [ 44.017103] [ 44.024505] CPU: 1 PID: 6676 Comm: syz-executor.0 Tainted: G B 4.19.114-syzkaller #0 [ 44.033815] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.043177] Call Trace: [ 44.045776] dump_stack+0x188/0x20d [ 44.049416] panic+0x26a/0x50e [ 44.052724] ? __warn_printk+0xf3/0xf3 [ 44.056604] ? preempt_schedule_common+0x4a/0xc0 [ 44.061411] ? __list_add_valid+0x93/0xa0 [ 44.065826] ? ___preempt_schedule+0x16/0x18 [ 44.070355] ? trace_hardirqs_on+0x55/0x210 [ 44.074679] ? __list_add_valid+0x93/0xa0 [ 44.078831] kasan_end_report+0x43/0x49 [ 44.082801] kasan_report.cold+0xa4/0x2b9 [ 44.086944] __list_add_valid+0x93/0xa0 [ 44.090915] rdma_listen+0x609/0x880 [ 44.094629] ucma_listen+0x14d/0x1c0 [ 44.098348] ? ucma_notify+0x190/0x190 [ 44.102228] ? __might_fault+0x192/0x1d0 [ 44.106281] ? _copy_from_user+0xd2/0x140 [ 44.110422] ? ucma_notify+0x190/0x190 [ 44.114301] ucma_write+0x285/0x350 [ 44.117925] ? ucma_open+0x280/0x280 [ 44.121639] ? __fget+0x319/0x510 [ 44.125086] __vfs_write+0xf7/0x760 [ 44.128713] ? ucma_open+0x280/0x280 [ 44.132421] ? kernel_read+0x110/0x110 [ 44.136301] ? __inode_security_revalidate+0xd3/0x120 [ 44.141480] ? avc_policy_seqno+0x9/0x70 [ 44.145538] ? selinux_file_permission+0x87/0x520 [ 44.150461] ? security_file_permission+0x84/0x220 [ 44.155385] vfs_write+0x206/0x550 [ 44.158941] ksys_write+0x12b/0x2a0 [ 44.162570] ? __ia32_sys_read+0xb0/0xb0 [ 44.166619] ? __ia32_sys_clock_settime+0x260/0x260 [ 44.171628] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 44.176387] ? trace_hardirqs_off_caller+0x55/0x210 [ 44.181418] ? do_syscall_64+0x21/0x620 [ 44.185389] do_syscall_64+0xf9/0x620 [ 44.189184] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.194364] RIP: 0033:0x45c849 [ 44.197549] 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 [ 44.216442] RSP: 002b:00007f468370ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 44.224438] RAX: ffffffffffffffda RBX: 00007f468370f6d4 RCX: 000000000045c849 [ 44.231709] RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000004 [ 44.238974] RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 [ 44.246236] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 44.253615] R13: 0000000000000cc0 R14: 00000000004cee4e R15: 000000000076bf0c [ 44.262547] Kernel Offset: disabled [ 44.266290] Rebooting in 86400 seconds..