[ 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 '10.128.0.88' (ECDSA) to the list of known hosts. 2020/05/15 20:19:17 parsed 1 programs 2020/05/15 20:19:17 executed programs: 0 syzkaller login: [ 58.686934][ T7046] IPVS: ftp: loaded support on port[0] = 21 [ 58.785388][ T7046] chnl_net:caif_netlink_parms(): no params data found [ 58.837144][ T7046] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.845278][ T7046] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.854171][ T7046] device bridge_slave_0 entered promiscuous mode [ 58.863520][ T7046] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.871278][ T7046] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.879441][ T7046] device bridge_slave_1 entered promiscuous mode [ 58.900114][ T7046] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.911206][ T7046] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.933957][ T7046] team0: Port device team_slave_0 added [ 58.941365][ T7046] team0: Port device team_slave_1 added [ 58.959834][ T7046] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 58.967233][ 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. [ 58.998900][ T7046] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 59.011808][ T7046] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 59.018934][ 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. [ 59.045562][ T7046] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 59.130825][ T7046] device hsr_slave_0 entered promiscuous mode [ 59.177063][ T7046] device hsr_slave_1 entered promiscuous mode [ 59.303473][ T7046] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 59.370606][ T7046] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 59.438953][ T7046] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 59.479452][ T7046] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 59.532361][ T7046] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.540068][ T7046] bridge0: port 2(bridge_slave_1) entered forwarding state [ 59.547904][ T7046] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.554972][ T7046] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.600840][ T7046] 8021q: adding VLAN 0 to HW filter on device bond0 [ 59.613310][ T3249] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 59.624664][ T3249] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.633429][ T3249] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.641777][ T3249] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 59.654686][ T7046] 8021q: adding VLAN 0 to HW filter on device team0 [ 59.667238][ T3249] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 59.675544][ T3249] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.682662][ T3249] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.694376][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 59.704424][ T2939] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.711547][ T2939] bridge0: port 2(bridge_slave_1) entered forwarding state [ 59.740265][ T3249] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 59.749837][ T3249] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 59.759303][ T3249] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 59.767892][ T3249] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 59.776748][ T3249] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 59.797830][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 59.805195][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 59.819040][ T7046] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 59.839988][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 59.849047][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 59.868148][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 59.878212][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 59.887416][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 59.895924][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 59.906974][ T7046] device veth0_vlan entered promiscuous mode [ 59.923304][ T7046] device veth1_vlan entered promiscuous mode [ 59.944713][ T3249] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 59.953755][ T3249] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 59.962500][ T3249] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 59.971208][ T3249] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 59.982182][ T7046] device veth0_macvtap entered promiscuous mode [ 59.992925][ T7046] device veth1_macvtap entered promiscuous mode [ 60.010818][ T7046] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 60.019220][ T3249] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 60.028226][ T3249] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 60.036087][ T3249] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 60.045303][ T3249] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 60.058620][ T7046] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 60.066074][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 60.075754][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 60.287545][ T7255] IPVS: ftp: loaded support on port[0] = 21 [ 60.437420][ T7280] IPVS: ftp: loaded support on port[0] = 21 [ 60.459672][ T2959] tipc: TX() has been purged, node left! [ 60.624930][ T7305] IPVS: ftp: loaded support on port[0] = 21 [ 60.761311][ T7330] IPVS: ftp: loaded support on port[0] = 21 [ 60.938902][ T7355] IPVS: ftp: loaded support on port[0] = 21 [ 61.114860][ T7380] IPVS: ftp: loaded support on port[0] = 21 [ 61.297563][ T7405] IPVS: ftp: loaded support on port[0] = 21 [ 61.370949][ T7405] ================================================================== [ 61.378930][ T7428] IPVS: ftp: loaded support on port[0] = 21 [ 61.379208][ T7405] BUG: KASAN: slab-out-of-bounds in fl6_update_dst+0x2bb/0x2c0 [ 61.392620][ T7405] Read of size 16 at addr ffff8880a4df4768 by task syz-executor.0/7405 [ 61.400843][ T7405] [ 61.403174][ T7405] CPU: 0 PID: 7405 Comm: syz-executor.0 Not tainted 5.7.0-rc5-syzkaller #0 [ 61.411745][ T7405] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.424759][ T7405] Call Trace: [ 61.428039][ T7405] dump_stack+0x188/0x20d [ 61.432390][ T7405] print_address_description.constprop.0.cold+0xd3/0x413 [ 61.439404][ T7405] ? vprintk_func+0x81/0x17e [ 61.443968][ T7405] ? fl6_update_dst+0x2bb/0x2c0 [ 61.448820][ T7405] __kasan_report.cold+0x20/0x38 [ 61.453774][ T7405] ? fl6_update_dst+0x2bb/0x2c0 [ 61.458620][ T7405] ? fl6_update_dst+0x2bb/0x2c0 [ 61.463445][ T7405] kasan_report+0x33/0x50 [ 61.467782][ T7405] fl6_update_dst+0x2bb/0x2c0 [ 61.472646][ T7405] udpv6_sendmsg+0x1866/0x2b50 [ 61.477408][ T7405] ? ip_reply_glue_bits+0xb0/0xb0 [ 61.482416][ T7405] ? udp_v6_get_port+0x690/0x690 [ 61.487347][ T7405] ? mark_held_locks+0xe0/0xe0 [ 61.492086][ T7405] ? mark_held_locks+0xe0/0xe0 [ 61.496828][ T7405] ? mark_held_locks+0x9f/0xe0 [ 61.501568][ T7405] ? release_sock+0x1b/0x1b0 [ 61.506134][ T7405] ? release_sock+0x1b/0x1b0 [ 61.510701][ T7405] ? find_held_lock+0x2d/0x110 [ 61.515439][ T7405] ? inet_autobind+0x130/0x190 [ 61.520195][ T7405] ? lock_downgrade+0x840/0x840 [ 61.525070][ T7405] ? __local_bh_enable_ip+0x159/0x270 [ 61.530422][ T7405] ? lockdep_hardirqs_on+0x463/0x620 [ 61.535694][ T7405] ? inet_autobind+0x130/0x190 [ 61.540433][ T7405] ? __local_bh_enable_ip+0x159/0x270 [ 61.545792][ T7405] ? inet6_sendmsg+0x99/0xe0 [ 61.550363][ T7405] inet6_sendmsg+0x99/0xe0 [ 61.554768][ T7405] ? inet6_ioctl+0x1b0/0x1b0 [ 61.559333][ T7405] sock_sendmsg+0xcf/0x120 [ 61.563727][ T7405] __sys_sendto+0x220/0x330 [ 61.568213][ T7405] ? __ia32_sys_getpeername+0xb0/0xb0 [ 61.573566][ T7405] ? _copy_to_user+0x126/0x160 [ 61.578314][ T7405] ? ns_to_kernel_old_timeval+0x100/0x100 [ 61.584007][ T7405] ? __x64_sys_futex+0x380/0x4f0 [ 61.588931][ T7405] ? __x64_sys_clock_gettime+0x165/0x240 [ 61.594537][ T7405] ? __ia32_sys_clock_settime+0x260/0x260 [ 61.600235][ T7405] __x64_sys_sendto+0xdd/0x1b0 [ 61.604983][ T7405] ? lockdep_hardirqs_on+0x463/0x620 [ 61.610242][ T7405] do_syscall_64+0xf6/0x7d0 [ 61.614721][ T7405] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 61.620586][ T7405] RIP: 0033:0x45c829 [ 61.624457][ T7405] Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 61.644036][ T7405] RSP: 002b:00007f2dd4f53c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 61.652433][ T7405] RAX: ffffffffffffffda RBX: 0000000000500fa0 RCX: 000000000045c829 [ 61.660380][ T7405] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 61.668333][ T7405] RBP: 000000000078bf00 R08: 00000000200001c0 R09: 000000000000001c [ 61.676330][ T7405] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 61.684340][ T7405] R13: 0000000000000a0f R14: 00000000004ccc62 R15: 00007f2dd4f546d4 [ 61.692299][ T7405] [ 61.694631][ T7405] Allocated by task 7428: [ 61.698951][ T7405] save_stack+0x1b/0x40 [ 61.703168][ T7405] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 61.708774][ T7405] __kmalloc+0x161/0x7a0 [ 61.712992][ T7405] sock_kmalloc+0xb5/0x100 [ 61.717393][ T7405] ipv6_renew_options+0x274/0x940 [ 61.722389][ T7405] do_ipv6_setsockopt.isra.0+0x2eaf/0x42f0 [ 61.728167][ T7405] ipv6_setsockopt+0xfb/0x180 [ 61.732815][ T7405] udpv6_setsockopt+0x5d/0xa0 [ 61.737467][ T7405] __sys_setsockopt+0x248/0x480 [ 61.742303][ T7405] __x64_sys_setsockopt+0xba/0x150 [ 61.747392][ T7405] do_syscall_64+0xf6/0x7d0 [ 61.751870][ T7405] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 61.757764][ T7405] [ 61.760073][ T7405] Freed by task 1: [ 61.763781][ T7405] save_stack+0x1b/0x40 [ 61.767915][ T7405] __kasan_slab_free+0xf7/0x140 [ 61.772743][ T7405] kfree+0x109/0x2b0 [ 61.776621][ T7405] tomoyo_path_perm+0x236/0x400 [ 61.781447][ T7405] security_inode_getattr+0xeb/0x150 [ 61.786705][ T7405] vfs_getattr+0x22/0x60 [ 61.790920][ T7405] vfs_statx_fd+0x6a/0xb0 [ 61.795340][ T7405] __do_sys_newfstat+0x8b/0x100 [ 61.800168][ T7405] do_syscall_64+0xf6/0x7d0 [ 61.804645][ T7405] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 61.810507][ T7405] [ 61.812849][ T7405] The buggy address belongs to the object at ffff8880a4df4700 [ 61.812849][ T7405] which belongs to the cache kmalloc-128 of size 128 [ 61.826892][ T7405] The buggy address is located 104 bytes inside of [ 61.826892][ T7405] 128-byte region [ffff8880a4df4700, ffff8880a4df4780) [ 61.840133][ T7405] The buggy address belongs to the page: [ 61.845746][ T7405] page:ffffea0002937d00 refcount:1 mapcount:0 mapping:0000000004522369 index:0x0 [ 61.855195][ T7405] flags: 0xfffe0000000200(slab) [ 61.860027][ T7405] raw: 00fffe0000000200 ffffea00028da788 ffffea00024e6fc8 ffff8880aa000700 [ 61.869810][ T7405] raw: 0000000000000000 ffff8880a4df4000 0000000100000010 0000000000000000 [ 61.878372][ T7405] page dumped because: kasan: bad access detected [ 61.884756][ T7405] [ 61.887065][ T7405] Memory state around the buggy address: [ 61.892669][ T7405] ffff8880a4df4600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.900720][ T7405] ffff8880a4df4680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.908767][ T7405] >ffff8880a4df4700: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 61.916802][ T7405] ^ [ 61.924230][ T7405] ffff8880a4df4780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.932292][ T7405] ffff8880a4df4800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.940343][ T7405] ================================================================== [ 61.948392][ T7405] Disabling lock debugging due to kernel taint [ 61.960959][ T7405] Kernel panic - not syncing: panic_on_warn set ... [ 61.967555][ T7405] CPU: 0 PID: 7405 Comm: syz-executor.0 Tainted: G B 5.7.0-rc5-syzkaller #0 [ 61.977551][ T7405] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.987610][ T7405] Call Trace: [ 61.990889][ T7405] dump_stack+0x188/0x20d [ 61.995193][ T7405] panic+0x2e3/0x75c [ 61.999068][ T7405] ? add_taint.cold+0x16/0x16 [ 62.003720][ T7405] ? preempt_schedule_common+0x5e/0xc0 [ 62.009284][ T7405] ? fl6_update_dst+0x2bb/0x2c0 [ 62.014111][ T7405] ? preempt_schedule_thunk+0x16/0x18 [ 62.019458][ T7405] ? trace_hardirqs_on+0x55/0x220 [ 62.024456][ T7405] ? fl6_update_dst+0x2bb/0x2c0 [ 62.029294][ T7405] end_report+0x4d/0x53 [ 62.033423][ T7405] __kasan_report.cold+0xd/0x38 [ 62.038269][ T7405] ? fl6_update_dst+0x2bb/0x2c0 [ 62.043098][ T7405] ? fl6_update_dst+0x2bb/0x2c0 [ 62.047918][ T7405] kasan_report+0x33/0x50 [ 62.052219][ T7405] fl6_update_dst+0x2bb/0x2c0 [ 62.056877][ T7405] udpv6_sendmsg+0x1866/0x2b50 [ 62.061671][ T7405] ? ip_reply_glue_bits+0xb0/0xb0 [ 62.066742][ T7405] ? udp_v6_get_port+0x690/0x690 [ 62.071697][ T7405] ? mark_held_locks+0xe0/0xe0 [ 62.076437][ T7405] ? mark_held_locks+0xe0/0xe0 [ 62.081210][ T7405] ? mark_held_locks+0x9f/0xe0 [ 62.085951][ T7405] ? release_sock+0x1b/0x1b0 [ 62.090511][ T7405] ? release_sock+0x1b/0x1b0 [ 62.095074][ T7405] ? find_held_lock+0x2d/0x110 [ 62.099825][ T7405] ? inet_autobind+0x130/0x190 [ 62.104560][ T7405] ? lock_downgrade+0x840/0x840 [ 62.109386][ T7405] ? __local_bh_enable_ip+0x159/0x270 [ 62.114727][ T7405] ? lockdep_hardirqs_on+0x463/0x620 [ 62.119981][ T7405] ? inet_autobind+0x130/0x190 [ 62.124739][ T7405] ? __local_bh_enable_ip+0x159/0x270 [ 62.130094][ T7405] ? inet6_sendmsg+0x99/0xe0 [ 62.134652][ T7405] inet6_sendmsg+0x99/0xe0 [ 62.139045][ T7405] ? inet6_ioctl+0x1b0/0x1b0 [ 62.143611][ T7405] sock_sendmsg+0xcf/0x120 [ 62.147999][ T7405] __sys_sendto+0x220/0x330 [ 62.152475][ T7405] ? __ia32_sys_getpeername+0xb0/0xb0 [ 62.157821][ T7405] ? _copy_to_user+0x126/0x160 [ 62.162556][ T7405] ? ns_to_kernel_old_timeval+0x100/0x100 [ 62.168247][ T7405] ? __x64_sys_futex+0x380/0x4f0 [ 62.173165][ T7405] ? __x64_sys_clock_gettime+0x165/0x240 [ 62.178770][ T7405] ? __ia32_sys_clock_settime+0x260/0x260 [ 62.184459][ T7405] __x64_sys_sendto+0xdd/0x1b0 [ 62.189196][ T7405] ? lockdep_hardirqs_on+0x463/0x620 [ 62.194465][ T7405] do_syscall_64+0xf6/0x7d0 [ 62.198941][ T7405] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 62.204800][ T7405] RIP: 0033:0x45c829 [ 62.208680][ T7405] Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 62.228270][ T7405] RSP: 002b:00007f2dd4f53c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 62.236650][ T7405] RAX: ffffffffffffffda RBX: 0000000000500fa0 RCX: 000000000045c829 [ 62.244592][ T7405] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 62.252890][ T7405] RBP: 000000000078bf00 R08: 00000000200001c0 R09: 000000000000001c [ 62.260842][ T7405] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 62.268800][ T7405] R13: 0000000000000a0f R14: 00000000004ccc62 R15: 00007f2dd4f546d4 [ 62.278058][ T7405] Kernel Offset: disabled [ 62.282380][ T7405] Rebooting in 86400 seconds..