[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.47' (ECDSA) to the list of known hosts. 2020/05/23 05:46:23 parsed 1 programs 2020/05/23 05:46:23 executed programs: 0 syzkaller login: [ 76.198622][ T29] audit: type=1400 audit(1590212783.668:8): avc: denied { execmem } for pid=7082 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 76.241813][ T7083] IPVS: ftp: loaded support on port[0] = 21 [ 76.350081][ T7083] chnl_net:caif_netlink_parms(): no params data found [ 76.403260][ T7083] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.411042][ T7083] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.419533][ T7083] device bridge_slave_0 entered promiscuous mode [ 76.428773][ T7083] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.436527][ T7083] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.445922][ T7083] device bridge_slave_1 entered promiscuous mode [ 76.466819][ T7083] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 76.478359][ T7083] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 76.503541][ T7083] team0: Port device team_slave_0 added [ 76.511382][ T7083] team0: Port device team_slave_1 added [ 76.531259][ T7083] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 76.538501][ T7083] 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. [ 76.565335][ T7083] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 76.578085][ T7083] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 76.585356][ T7083] 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. [ 76.611460][ T7083] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 76.684796][ T7083] device hsr_slave_0 entered promiscuous mode [ 76.732539][ T7083] device hsr_slave_1 entered promiscuous mode [ 76.897165][ T7083] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 76.945388][ T7083] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 76.974811][ T7083] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 77.015396][ T7083] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 77.089914][ T7083] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.097186][ T7083] bridge0: port 2(bridge_slave_1) entered forwarding state [ 77.105491][ T7083] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.112782][ T7083] bridge0: port 1(bridge_slave_0) entered forwarding state [ 77.165700][ T7083] 8021q: adding VLAN 0 to HW filter on device bond0 [ 77.180216][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 77.191529][ T5] bridge0: port 1(bridge_slave_0) entered disabled state [ 77.200863][ T5] bridge0: port 2(bridge_slave_1) entered disabled state [ 77.209796][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 77.224462][ T7083] 8021q: adding VLAN 0 to HW filter on device team0 [ 77.236288][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 77.245460][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.252636][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 77.272506][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 77.281233][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.288367][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 77.301561][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 77.311586][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 77.324167][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 77.341076][ T7083] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 77.354148][ T7083] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 77.366141][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 77.375418][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 77.384795][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 77.393629][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 77.413808][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 77.421673][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 77.429371][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 77.448705][ T7083] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 77.470181][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 77.479681][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 77.503590][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 77.511894][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 77.521289][ T7083] device veth0_vlan entered promiscuous mode [ 77.528913][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 77.537210][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 77.551906][ T7083] device veth1_vlan entered promiscuous mode [ 77.575530][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 77.584077][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 77.592222][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 77.600694][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 77.612867][ T7083] device veth0_macvtap entered promiscuous mode [ 77.623523][ T7083] device veth1_macvtap entered promiscuous mode [ 77.641734][ T7083] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 77.649481][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 77.658627][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 77.667311][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 77.677263][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 77.690052][ T7083] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 77.699171][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 77.709174][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 77.905811][ T7292] IPVS: ftp: loaded support on port[0] = 21 [ 77.973663][ T7292] ================================================================== [ 77.981905][ T7292] BUG: KASAN: slab-out-of-bounds in fl6_update_dst+0x2bb/0x2c0 [ 77.989559][ T7292] Read of size 16 at addr ffff8880a30a4c68 by task syz-executor.0/7292 [ 77.997776][ T7292] [ 78.000101][ T7292] CPU: 0 PID: 7292 Comm: syz-executor.0 Not tainted 5.7.0-rc6-syzkaller #0 [ 78.008749][ T7292] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.018815][ T7292] Call Trace: [ 78.022299][ T7292] dump_stack+0x188/0x20d [ 78.026627][ T7292] print_address_description.constprop.0.cold+0xd3/0x413 [ 78.033643][ T7292] ? vprintk_func+0x81/0x17e [ 78.038220][ T7292] ? fl6_update_dst+0x2bb/0x2c0 [ 78.043053][ T7292] __kasan_report.cold+0x20/0x38 [ 78.047988][ T7292] ? fl6_update_dst+0x2bb/0x2c0 [ 78.052833][ T7292] ? fl6_update_dst+0x2bb/0x2c0 [ 78.057697][ T7292] kasan_report+0x33/0x50 [ 78.062024][ T7292] fl6_update_dst+0x2bb/0x2c0 [ 78.066708][ T7292] udpv6_sendmsg+0x1866/0x2b50 [ 78.071801][ T7292] ? ip_reply_glue_bits+0xb0/0xb0 [ 78.076820][ T7292] ? udp_v6_get_port+0x690/0x690 [ 78.081759][ T7292] ? lockdep_hardirqs_on+0x463/0x620 [ 78.087027][ T7292] ? _raw_spin_unlock_irq+0x55/0x80 [ 78.092213][ T7292] ? finish_task_switch+0x147/0x750 [ 78.097401][ T7292] ? finish_task_switch+0x119/0x750 [ 78.102584][ T7292] ? __schedule+0x93f/0x1ff0 [ 78.107155][ T7292] ? find_held_lock+0x2d/0x110 [ 78.111900][ T7292] ? inet_autobind+0x130/0x190 [ 78.116662][ T7292] ? preempt_schedule_common+0x5e/0xc0 [ 78.122105][ T7292] ? preempt_schedule_thunk+0x16/0x18 [ 78.127490][ T7292] ? inet_autobind+0x130/0x190 [ 78.132250][ T7292] ? __local_bh_enable_ip+0x21a/0x270 [ 78.138498][ T7292] ? inet6_sendmsg+0x99/0xe0 [ 78.143109][ T7292] inet6_sendmsg+0x99/0xe0 [ 78.147527][ T7292] ? inet6_ioctl+0x1b0/0x1b0 [ 78.152114][ T7292] sock_sendmsg+0xcf/0x120 [ 78.156610][ T7292] __sys_sendto+0x220/0x330 [ 78.161109][ T7292] ? __ia32_sys_getpeername+0xb0/0xb0 [ 78.166485][ T7292] ? _copy_to_user+0x126/0x160 [ 78.171238][ T7292] ? ns_to_kernel_old_timeval+0x100/0x100 [ 78.176957][ T7292] ? __x64_sys_futex+0x380/0x4f0 [ 78.181909][ T7292] ? __x64_sys_clock_gettime+0x165/0x240 [ 78.187533][ T7292] ? __ia32_sys_clock_settime+0x260/0x260 [ 78.193275][ T7292] __x64_sys_sendto+0xdd/0x1b0 [ 78.198033][ T7292] ? lockdep_hardirqs_on+0x463/0x620 [ 78.203310][ T7292] do_syscall_64+0xf6/0x7d0 [ 78.207810][ T7292] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 78.213706][ T7292] RIP: 0033:0x45ca29 [ 78.217577][ T7292] 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 [ 78.237211][ T7292] RSP: 002b:00007f868c3f0c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 78.245695][ T7292] RAX: ffffffffffffffda RBX: 0000000000501200 RCX: 000000000045ca29 [ 78.253725][ T7292] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 78.261820][ T7292] RBP: 000000000078bf00 R08: 00000000200001c0 R09: 000000000000001c [ 78.269786][ T7292] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 78.277848][ T7292] R13: 0000000000000a0f R14: 00000000004cce62 R15: 00007f868c3f16d4 [ 78.285818][ T7292] [ 78.288143][ T7292] Allocated by task 7303: [ 78.292471][ T7292] save_stack+0x1b/0x40 [ 78.296722][ T7292] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 78.302342][ T7292] __kmalloc+0x161/0x7a0 [ 78.306567][ T7292] sock_kmalloc+0xb5/0x100 [ 78.310965][ T7292] ipv6_renew_options+0x274/0x940 [ 78.315988][ T7292] do_ipv6_setsockopt.isra.0+0x2eaf/0x42f0 [ 78.321801][ T7292] ipv6_setsockopt+0xfb/0x180 [ 78.326482][ T7292] udpv6_setsockopt+0x5d/0xa0 [ 78.331137][ T7292] __sys_setsockopt+0x248/0x480 [ 78.335970][ T7292] __x64_sys_setsockopt+0xba/0x150 [ 78.341064][ T7292] do_syscall_64+0xf6/0x7d0 [ 78.345627][ T7292] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 78.351882][ T7292] [ 78.354329][ T7292] Freed by task 5119: [ 78.358314][ T7292] save_stack+0x1b/0x40 [ 78.362578][ T7292] __kasan_slab_free+0xf7/0x140 [ 78.367418][ T7292] kfree+0x109/0x2b0 [ 78.371297][ T7292] kernfs_fop_release+0xe7/0x190 [ 78.376231][ T7292] __fput+0x33e/0x880 [ 78.380715][ T7292] task_work_run+0xf4/0x1b0 [ 78.385200][ T7292] exit_to_usermode_loop+0x2fa/0x360 [ 78.390470][ T7292] do_syscall_64+0x6b1/0x7d0 [ 78.395046][ T7292] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 78.400920][ T7292] [ 78.403278][ T7292] The buggy address belongs to the object at ffff8880a30a4c00 [ 78.403278][ T7292] which belongs to the cache kmalloc-128 of size 128 [ 78.417311][ T7292] The buggy address is located 104 bytes inside of [ 78.417311][ T7292] 128-byte region [ffff8880a30a4c00, ffff8880a30a4c80) [ 78.430578][ T7292] The buggy address belongs to the page: [ 78.436296][ T7292] page:ffffea00028c2900 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880a30a4e00 [ 78.446726][ T7292] flags: 0xfffe0000000200(slab) [ 78.451584][ T7292] raw: 00fffe0000000200 ffffea000296a048 ffff8880aa001540 ffff8880aa000700 [ 78.460295][ T7292] raw: ffff8880a30a4e00 ffff8880a30a4000 000000010000000f 0000000000000000 [ 78.468881][ T7292] page dumped because: kasan: bad access detected [ 78.475280][ T7292] [ 78.477600][ T7292] Memory state around the buggy address: [ 78.483262][ T7292] ffff8880a30a4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 78.491336][ T7292] ffff8880a30a4b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 78.499450][ T7292] >ffff8880a30a4c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 78.507904][ T7292] ^ [ 78.515344][ T7292] ffff8880a30a4c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 78.523401][ T7292] ffff8880a30a4d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 78.531474][ T7292] ================================================================== [ 78.539624][ T7292] Disabling lock debugging due to kernel taint [ 78.558243][ T7292] Kernel panic - not syncing: panic_on_warn set ... [ 78.564890][ T7292] CPU: 0 PID: 7292 Comm: syz-executor.0 Tainted: G B 5.7.0-rc6-syzkaller #0 [ 78.574861][ T7292] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.585118][ T7292] Call Trace: [ 78.588426][ T7292] dump_stack+0x188/0x20d [ 78.592762][ T7292] panic+0x2e3/0x75c [ 78.596738][ T7292] ? add_taint.cold+0x16/0x16 [ 78.601580][ T7292] ? preempt_schedule_common+0x5e/0xc0 [ 78.607030][ T7292] ? fl6_update_dst+0x2bb/0x2c0 [ 78.612002][ T7292] ? preempt_schedule_thunk+0x16/0x18 [ 78.617366][ T7292] ? trace_hardirqs_on+0x55/0x220 [ 78.622378][ T7292] ? fl6_update_dst+0x2bb/0x2c0 [ 78.627335][ T7292] end_report+0x4d/0x53 [ 78.631480][ T7292] __kasan_report.cold+0xd/0x38 [ 78.636354][ T7292] ? fl6_update_dst+0x2bb/0x2c0 [ 78.641330][ T7292] ? fl6_update_dst+0x2bb/0x2c0 [ 78.646781][ T7292] kasan_report+0x33/0x50 [ 78.651474][ T7292] fl6_update_dst+0x2bb/0x2c0 [ 78.656256][ T7292] udpv6_sendmsg+0x1866/0x2b50 [ 78.661005][ T7292] ? ip_reply_glue_bits+0xb0/0xb0 [ 78.666022][ T7292] ? udp_v6_get_port+0x690/0x690 [ 78.670958][ T7292] ? lockdep_hardirqs_on+0x463/0x620 [ 78.676249][ T7292] ? _raw_spin_unlock_irq+0x55/0x80 [ 78.681447][ T7292] ? finish_task_switch+0x147/0x750 [ 78.686643][ T7292] ? finish_task_switch+0x119/0x750 [ 78.691846][ T7292] ? __schedule+0x93f/0x1ff0 [ 78.696438][ T7292] ? find_held_lock+0x2d/0x110 [ 78.701181][ T7292] ? inet_autobind+0x130/0x190 [ 78.705927][ T7292] ? preempt_schedule_common+0x5e/0xc0 [ 78.711365][ T7292] ? preempt_schedule_thunk+0x16/0x18 [ 78.716726][ T7292] ? inet_autobind+0x130/0x190 [ 78.721471][ T7292] ? __local_bh_enable_ip+0x21a/0x270 [ 78.726961][ T7292] ? inet6_sendmsg+0x99/0xe0 [ 78.733874][ T7292] inet6_sendmsg+0x99/0xe0 [ 78.738270][ T7292] ? inet6_ioctl+0x1b0/0x1b0 [ 78.742856][ T7292] sock_sendmsg+0xcf/0x120 [ 78.747251][ T7292] __sys_sendto+0x220/0x330 [ 78.751742][ T7292] ? __ia32_sys_getpeername+0xb0/0xb0 [ 78.757128][ T7292] ? _copy_to_user+0x126/0x160 [ 78.761984][ T7292] ? ns_to_kernel_old_timeval+0x100/0x100 [ 78.767699][ T7292] ? __x64_sys_futex+0x380/0x4f0 [ 78.772654][ T7292] ? __x64_sys_clock_gettime+0x165/0x240 [ 78.778296][ T7292] ? __ia32_sys_clock_settime+0x260/0x260 [ 78.784805][ T7292] __x64_sys_sendto+0xdd/0x1b0 [ 78.789558][ T7292] ? lockdep_hardirqs_on+0x463/0x620 [ 78.794835][ T7292] do_syscall_64+0xf6/0x7d0 [ 78.799359][ T7292] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 78.805389][ T7292] RIP: 0033:0x45ca29 [ 78.809277][ T7292] 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 [ 78.829122][ T7292] RSP: 002b:00007f868c3f0c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 78.837591][ T7292] RAX: ffffffffffffffda RBX: 0000000000501200 RCX: 000000000045ca29 [ 78.845616][ T7292] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 78.853631][ T7292] RBP: 000000000078bf00 R08: 00000000200001c0 R09: 000000000000001c [ 78.861587][ T7292] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 78.869565][ T7292] R13: 0000000000000a0f R14: 00000000004cce62 R15: 00007f868c3f16d4 [ 78.878950][ T7292] Kernel Offset: disabled [ 78.883324][ T7292] Rebooting in 86400 seconds..