[ OK ] Started OpenBSD Secure Shell server. [ 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 '10.128.0.221' (ECDSA) to the list of known hosts. syzkaller login: [ 137.460529][ T33] audit: type=1400 audit(1595205137.924:8): avc: denied { execmem } for pid=8523 comm="syz-executor152" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 137.490255][ T8524] IPVS: ftp: loaded support on port[0] = 21 [ 137.654902][ T8524] chnl_net:caif_netlink_parms(): no params data found [ 137.807496][ T8524] bridge0: port 1(bridge_slave_0) entered blocking state [ 137.815653][ T8524] bridge0: port 1(bridge_slave_0) entered disabled state [ 137.825758][ T8524] device bridge_slave_0 entered promiscuous mode [ 137.839227][ T8524] bridge0: port 2(bridge_slave_1) entered blocking state [ 137.849219][ T8524] bridge0: port 2(bridge_slave_1) entered disabled state [ 137.859831][ T8524] device bridge_slave_1 entered promiscuous mode [ 137.897165][ T8524] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 137.910425][ T8524] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 137.957382][ T8524] team0: Port device team_slave_0 added [ 137.967268][ T8524] team0: Port device team_slave_1 added [ 138.005429][ T8524] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 138.013290][ T8524] 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. [ 138.042237][ T8524] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 138.056782][ T8524] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 138.064217][ T8524] 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. [ 138.094582][ T8524] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 138.179166][ T8524] device hsr_slave_0 entered promiscuous mode [ 138.233467][ T8524] device hsr_slave_1 entered promiscuous mode [ 138.455850][ T8524] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 138.488229][ T8524] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 138.536979][ T8524] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 138.597741][ T8524] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 138.671765][ T8524] bridge0: port 2(bridge_slave_1) entered blocking state [ 138.679664][ T8524] bridge0: port 2(bridge_slave_1) entered forwarding state [ 138.688150][ T8524] bridge0: port 1(bridge_slave_0) entered blocking state [ 138.695778][ T8524] bridge0: port 1(bridge_slave_0) entered forwarding state [ 138.711591][ T5] bridge0: port 1(bridge_slave_0) entered disabled state [ 138.721261][ T5] bridge0: port 2(bridge_slave_1) entered disabled state [ 138.799387][ T8524] 8021q: adding VLAN 0 to HW filter on device bond0 [ 138.820661][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 138.830217][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 138.848732][ T8524] 8021q: adding VLAN 0 to HW filter on device team0 [ 138.864961][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 138.874748][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 138.884704][ T32] bridge0: port 1(bridge_slave_0) entered blocking state [ 138.894238][ T32] bridge0: port 1(bridge_slave_0) entered forwarding state [ 138.935356][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 138.947370][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 138.957323][ T32] bridge0: port 2(bridge_slave_1) entered blocking state [ 138.965186][ T32] bridge0: port 2(bridge_slave_1) entered forwarding state [ 138.976341][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 138.987623][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 138.998447][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 139.009639][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 139.020287][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 139.032506][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 139.050340][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 139.063167][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 139.073441][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 139.102215][ T8524] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 139.116478][ T8524] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 139.134317][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 139.143989][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 139.182020][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 139.190139][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 139.214641][ T8524] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 139.247262][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 139.260520][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 139.298300][ T8524] device veth0_vlan entered promiscuous mode [ 139.307240][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 139.318636][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 139.334649][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 139.344519][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 139.366553][ T8524] device veth1_vlan entered promiscuous mode [ 139.405696][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 139.414607][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 139.424985][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 139.435101][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 139.451731][ T8524] device veth0_macvtap entered promiscuous mode [ 139.471869][ T8524] device veth1_macvtap entered promiscuous mode [ 139.509074][ T8524] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 139.518658][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 139.529676][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 139.539292][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 139.549455][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 139.568565][ T8524] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 139.595558][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 139.605054][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 139.816242][ T8524] ===================================================== [ 139.823556][ T8524] BUG: KMSAN: uninit-value in __skb_flow_dissect+0x30f0/0x8440 [ 139.831092][ T8524] CPU: 0 PID: 8524 Comm: syz-executor152 Not tainted 5.8.0-rc5-syzkaller #0 [ 139.839907][ T8524] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 139.850338][ T8524] Call Trace: [ 139.853759][ T8524] dump_stack+0x1df/0x240 [ 139.858341][ T8524] kmsan_report+0xf7/0x1e0 [ 139.865043][ T8524] __msan_warning+0x58/0xa0 [ 139.869565][ T8524] __skb_flow_dissect+0x30f0/0x8440 [ 139.874930][ T8524] ? kmsan_set_origin_checked+0x95/0xf0 [ 139.882163][ T8524] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 139.889031][ T8524] __skb_get_hash+0x131/0x480 [ 139.893733][ T8524] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 139.900087][ T8524] udp_flow_src_port+0xa5/0x690 [ 139.904975][ T8524] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 139.911216][ T8524] ? ipv4_mtu+0x471/0x520 [ 139.915915][ T8524] ? kmsan_get_metadata+0x11d/0x180 [ 139.921538][ T8524] geneve_xmit+0xdf1/0x2bf0 [ 139.927902][ T8524] ? kmsan_get_metadata+0x11d/0x180 [ 139.933361][ T8524] ? validate_xmit_xfrm+0xad/0x17a0 [ 139.938999][ T8524] ? geneve_stop+0x400/0x400 [ 139.943990][ T8524] dev_hard_start_xmit+0x50e/0xa70 [ 139.950390][ T8524] __dev_queue_xmit+0x2f8d/0x3b20 [ 139.956191][ T8524] ? kmsan_get_metadata+0x11d/0x180 [ 139.961923][ T8524] ? kmsan_memcpy_metadata+0xb/0x10 [ 139.967968][ T8524] dev_queue_xmit+0x4b/0x60 [ 139.972942][ T8524] pppoe_sendmsg+0xb43/0xb90 [ 139.977723][ T8524] ? llc_sysctl_exit+0x110/0x110 [ 139.982780][ T8524] ? pppoe_getname+0x170/0x170 [ 139.988454][ T8524] kernel_sendmsg+0x433/0x440 [ 139.993157][ T8524] sock_no_sendpage+0x235/0x300 [ 139.998208][ T8524] sock_sendpage+0x25b/0x2c0 [ 140.002811][ T8524] pipe_to_sendpage+0x38c/0x4c0 [ 140.007653][ T8524] ? sock_fasync+0x250/0x250 [ 140.012252][ T8524] __splice_from_pipe+0x565/0xf00 [ 140.017475][ T8524] ? generic_splice_sendpage+0x2d0/0x2d0 [ 140.023334][ T8524] generic_splice_sendpage+0x1d5/0x2d0 [ 140.029089][ T8524] ? iter_file_splice_write+0x1800/0x1800 [ 140.035030][ T8524] direct_splice_actor+0x1fd/0x580 [ 140.040170][ T8524] ? kmsan_get_metadata+0x4f/0x180 [ 140.045638][ T8524] splice_direct_to_actor+0x6b2/0xf50 [ 140.051521][ T8524] ? do_splice_direct+0x580/0x580 [ 140.056802][ T8524] do_splice_direct+0x342/0x580 [ 140.061671][ T8524] do_sendfile+0x101b/0x1d40 [ 140.066835][ T8524] __se_compat_sys_sendfile+0x301/0x3c0 [ 140.072666][ T8524] ? kmsan_get_metadata+0x11d/0x180 [ 140.078208][ T8524] ? __ia32_sys_sendfile64+0x70/0x70 [ 140.083480][ T8524] __ia32_compat_sys_sendfile+0x56/0x70 [ 140.089007][ T8524] __do_fast_syscall_32+0x2aa/0x400 [ 140.094220][ T8524] do_fast_syscall_32+0x6b/0xd0 [ 140.099089][ T8524] do_SYSENTER_32+0x73/0x90 [ 140.103601][ T8524] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 140.110076][ T8524] RIP: 0023:0xf7f13549 [ 140.114231][ T8524] Code: Bad RIP value. [ 140.118278][ T8524] RSP: 002b:00000000ffd520cc EFLAGS: 00000217 ORIG_RAX: 00000000000000bb [ 140.126865][ T8524] RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000000005 [ 140.135043][ T8524] RDX: 0000000000000000 RSI: 000000007fffffff RDI: 0000000000000006 [ 140.143110][ T8524] RBP: 0000000020000000 R08: 0000000000000000 R09: 0000000000000000 [ 140.151390][ T8524] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 140.160054][ T8524] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 140.169025][ T8524] [ 140.171346][ T8524] Uninit was stored to memory at: [ 140.176935][ T8524] kmsan_internal_chain_origin+0xad/0x130 [ 140.183224][ T8524] kmsan_memcpy_memmove_metadata+0x272/0x2e0 [ 140.189489][ T8524] kmsan_memcpy_metadata+0xb/0x10 [ 140.194499][ T8524] __msan_memcpy+0x43/0x50 [ 140.198891][ T8524] pppoe_sendmsg+0xaed/0xb90 [ 140.204229][ T8524] kernel_sendmsg+0x433/0x440 [ 140.209132][ T8524] sock_no_sendpage+0x235/0x300 [ 140.214095][ T8524] sock_sendpage+0x25b/0x2c0 [ 140.218699][ T8524] pipe_to_sendpage+0x38c/0x4c0 [ 140.223660][ T8524] __splice_from_pipe+0x565/0xf00 [ 140.228816][ T8524] generic_splice_sendpage+0x1d5/0x2d0 [ 140.234362][ T8524] direct_splice_actor+0x1fd/0x580 [ 140.240596][ T8524] splice_direct_to_actor+0x6b2/0xf50 [ 140.246253][ T8524] do_splice_direct+0x342/0x580 [ 140.251379][ T8524] do_sendfile+0x101b/0x1d40 [ 140.255965][ T8524] __se_compat_sys_sendfile+0x301/0x3c0 [ 140.261490][ T8524] __ia32_compat_sys_sendfile+0x56/0x70 [ 140.267121][ T8524] __do_fast_syscall_32+0x2aa/0x400 [ 140.272340][ T8524] do_fast_syscall_32+0x6b/0xd0 [ 140.277181][ T8524] do_SYSENTER_32+0x73/0x90 [ 140.281956][ T8524] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 140.288269][ T8524] [ 140.290583][ T8524] Local variable ----hdr@pppoe_sendmsg created at: [ 140.297066][ T8524] pppoe_sendmsg+0xa6/0xb90 [ 140.301548][ T8524] pppoe_sendmsg+0xa6/0xb90 [ 140.306035][ T8524] ===================================================== [ 140.312956][ T8524] Disabling lock debugging due to kernel taint [ 140.319113][ T8524] Kernel panic - not syncing: panic_on_warn set ... [ 140.325694][ T8524] CPU: 0 PID: 8524 Comm: syz-executor152 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 140.335739][ T8524] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 140.345820][ T8524] Call Trace: [ 140.349114][ T8524] dump_stack+0x1df/0x240 [ 140.353430][ T8524] panic+0x3d5/0xc3e [ 140.357316][ T8524] kmsan_report+0x1df/0x1e0 [ 140.361803][ T8524] __msan_warning+0x58/0xa0 [ 140.366309][ T8524] __skb_flow_dissect+0x30f0/0x8440 [ 140.372162][ T8524] ? kmsan_set_origin_checked+0x95/0xf0 [ 140.377717][ T8524] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 140.383774][ T8524] __skb_get_hash+0x131/0x480 [ 140.388719][ T8524] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 140.395321][ T8524] udp_flow_src_port+0xa5/0x690 [ 140.402196][ T8524] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 140.409754][ T8524] ? ipv4_mtu+0x471/0x520 [ 140.415154][ T8524] ? kmsan_get_metadata+0x11d/0x180 [ 140.420948][ T8524] geneve_xmit+0xdf1/0x2bf0 [ 140.425480][ T8524] ? kmsan_get_metadata+0x11d/0x180 [ 140.430786][ T8524] ? validate_xmit_xfrm+0xad/0x17a0 [ 140.436490][ T8524] ? geneve_stop+0x400/0x400 [ 140.441553][ T8524] dev_hard_start_xmit+0x50e/0xa70 [ 140.447992][ T8524] __dev_queue_xmit+0x2f8d/0x3b20 [ 140.454176][ T8524] ? kmsan_get_metadata+0x11d/0x180 [ 140.460953][ T8524] ? kmsan_memcpy_metadata+0xb/0x10 [ 140.467179][ T8524] dev_queue_xmit+0x4b/0x60 [ 140.472490][ T8524] pppoe_sendmsg+0xb43/0xb90 [ 140.478182][ T8524] ? llc_sysctl_exit+0x110/0x110 [ 140.484021][ T8524] ? pppoe_getname+0x170/0x170 [ 140.489459][ T8524] kernel_sendmsg+0x433/0x440 [ 140.496113][ T8524] sock_no_sendpage+0x235/0x300 [ 140.501484][ T8524] sock_sendpage+0x25b/0x2c0 [ 140.507061][ T8524] pipe_to_sendpage+0x38c/0x4c0 [ 140.512183][ T8524] ? sock_fasync+0x250/0x250 [ 140.516872][ T8524] __splice_from_pipe+0x565/0xf00 [ 140.522983][ T8524] ? generic_splice_sendpage+0x2d0/0x2d0 [ 140.529243][ T8524] generic_splice_sendpage+0x1d5/0x2d0 [ 140.536389][ T8524] ? iter_file_splice_write+0x1800/0x1800 [ 140.542314][ T8524] direct_splice_actor+0x1fd/0x580 [ 140.548200][ T8524] ? kmsan_get_metadata+0x4f/0x180 [ 140.553480][ T8524] splice_direct_to_actor+0x6b2/0xf50 [ 140.559394][ T8524] ? do_splice_direct+0x580/0x580 [ 140.566726][ T8524] do_splice_direct+0x342/0x580 [ 140.572961][ T8524] do_sendfile+0x101b/0x1d40 [ 140.578016][ T8524] __se_compat_sys_sendfile+0x301/0x3c0 [ 140.584774][ T8524] ? kmsan_get_metadata+0x11d/0x180 [ 140.589981][ T8524] ? __ia32_sys_sendfile64+0x70/0x70 [ 140.595275][ T8524] __ia32_compat_sys_sendfile+0x56/0x70 [ 140.600965][ T8524] __do_fast_syscall_32+0x2aa/0x400 [ 140.606335][ T8524] do_fast_syscall_32+0x6b/0xd0 [ 140.611197][ T8524] do_SYSENTER_32+0x73/0x90 [ 140.615710][ T8524] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 140.622034][ T8524] RIP: 0023:0xf7f13549 [ 140.626186][ T8524] Code: Bad RIP value. [ 140.630374][ T8524] RSP: 002b:00000000ffd520cc EFLAGS: 00000217 ORIG_RAX: 00000000000000bb [ 140.638797][ T8524] RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000000005 [ 140.646856][ T8524] RDX: 0000000000000000 RSI: 000000007fffffff RDI: 0000000000000006 [ 140.654824][ T8524] RBP: 0000000020000000 R08: 0000000000000000 R09: 0000000000000000 [ 140.663010][ T8524] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 140.670991][ T8524] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 140.681046][ T8524] Kernel Offset: 0xec00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 140.693031][ T8524] Rebooting in 86400 seconds..