[ OK ] Reached target Timers. [ OK ] Started Regular background program processing daemon. Starting Permit User Sessions... [ OK ] Started Permit User Sessions. [ OK ] Started System Logging Service. [ OK ] Found device /dev/ttyS0. [ ***] (1 of 2) A start job is running for…ot available (1min 28s / no limit) [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started OpenBSD Secure Shell server. [ 147.787099][ T8279] sshd (8279) used greatest stack depth: 4048 bytes left [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ 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 '10.128.0.208' (ECDSA) to the list of known hosts. syzkaller login: [ 164.702635][ T28] audit: type=1400 audit(1597646325.574:8): avc: denied { execmem } for pid=8479 comm="syz-executor155" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 164.738455][ T8480] IPVS: ftp: loaded support on port[0] = 21 [ 164.891524][ T8480] chnl_net:caif_netlink_parms(): no params data found [ 164.983205][ T8480] bridge0: port 1(bridge_slave_0) entered blocking state [ 164.990584][ T8480] bridge0: port 1(bridge_slave_0) entered disabled state [ 165.000182][ T8480] device bridge_slave_0 entered promiscuous mode [ 165.010850][ T8480] bridge0: port 2(bridge_slave_1) entered blocking state [ 165.018238][ T8480] bridge0: port 2(bridge_slave_1) entered disabled state [ 165.026691][ T8480] device bridge_slave_1 entered promiscuous mode [ 165.065498][ T8480] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 165.080022][ T8480] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 165.113997][ T8480] team0: Port device team_slave_0 added [ 165.123847][ T8480] team0: Port device team_slave_1 added [ 165.154848][ T8480] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 165.161963][ T8480] 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. [ 165.188130][ T8480] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 165.201713][ T8480] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 165.209216][ T8480] 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. [ 165.235378][ T8480] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 165.279106][ T8480] device hsr_slave_0 entered promiscuous mode [ 165.291087][ T8480] device hsr_slave_1 entered promiscuous mode [ 165.483165][ T8480] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 165.495503][ T8480] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 165.513722][ T8480] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 165.533740][ T8480] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 165.636278][ T8480] bridge0: port 2(bridge_slave_1) entered blocking state [ 165.643501][ T8480] bridge0: port 2(bridge_slave_1) entered forwarding state [ 165.651439][ T8480] bridge0: port 1(bridge_slave_0) entered blocking state [ 165.658820][ T8480] bridge0: port 1(bridge_slave_0) entered forwarding state [ 165.747059][ T8480] 8021q: adding VLAN 0 to HW filter on device bond0 [ 165.771259][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 165.781984][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 165.793066][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 165.803744][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 165.823917][ T8480] 8021q: adding VLAN 0 to HW filter on device team0 [ 165.844496][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 165.853480][ T1351] bridge0: port 1(bridge_slave_0) entered blocking state [ 165.860802][ T1351] bridge0: port 1(bridge_slave_0) entered forwarding state [ 165.877804][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 165.887071][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 165.896599][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 165.904010][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 165.928318][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 165.939039][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 165.957112][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 165.966888][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 166.002269][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 166.011265][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 166.021831][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 166.032755][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 166.042488][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 166.069892][ T8480] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 166.083686][ T8480] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 166.096476][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 166.106248][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 166.160991][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 166.171498][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 166.209751][ T8480] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 166.267260][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 166.277811][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 166.331357][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 166.340759][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 166.359671][ T8480] device veth0_vlan entered promiscuous mode [ 166.369589][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 166.379168][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 166.403267][ T8480] device veth1_vlan entered promiscuous mode [ 166.451070][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 166.459928][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 166.469814][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 166.479339][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 166.496858][ T8480] device veth0_macvtap entered promiscuous mode [ 166.513958][ T8480] device veth1_macvtap entered promiscuous mode [ 166.554447][ T8480] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 166.562115][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 166.571548][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 166.580815][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 166.590956][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 166.610770][ T8480] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 166.618927][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 166.629356][ T1351] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 166.824248][ T8690] ===================================================== [ 166.831314][ T8690] BUG: KMSAN: kernel-infoleak in kmsan_copy_to_user+0x81/0x90 [ 166.838760][ T8690] CPU: 0 PID: 8690 Comm: syz-executor155 Not tainted 5.8.0-rc5-syzkaller #0 [ 166.847409][ T8690] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 166.857462][ T8690] Call Trace: [ 166.860741][ T8690] dump_stack+0x21c/0x280 [ 166.865057][ T8690] kmsan_report+0xf7/0x1e0 [ 166.869495][ T8690] kmsan_internal_check_memory+0x238/0x3d0 [ 166.875287][ T8690] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 166.881094][ T8690] ? kmsan_get_metadata+0x116/0x180 [ 166.886297][ T8690] kmsan_copy_to_user+0x81/0x90 [ 166.891145][ T8690] _copy_to_iter+0x626/0x2de0 [ 166.895815][ T8690] ? sock_load_diag_module+0x3c0/0x3c0 [ 166.901270][ T8690] bcm_recvmsg+0x2ca/0x8e0 [ 166.905703][ T8690] ? bcm_sendmsg+0xa190/0xa190 [ 166.910458][ T8690] __sys_recvfrom+0x69a/0xa10 [ 166.915141][ T8690] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 166.921195][ T8690] __se_compat_sys_recvfrom+0x122/0x150 [ 166.926727][ T8690] __ia32_compat_sys_recvfrom+0x6e/0x90 [ 166.932260][ T8690] __do_fast_syscall_32+0x2af/0x480 [ 166.937470][ T8690] do_fast_syscall_32+0x6b/0xd0 [ 166.942304][ T8690] do_SYSENTER_32+0x73/0x90 [ 166.946894][ T8690] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 166.953216][ T8690] RIP: 0023:0xf7f7d549 [ 166.957262][ T8690] Code: Bad RIP value. [ 166.961315][ T8690] RSP: 002b:00000000f7f781dc EFLAGS: 00000292 ORIG_RAX: 0000000000000173 [ 166.969704][ T8690] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000040 [ 166.977656][ T8690] RDX: 0000000000000032 RSI: 0000000000000000 RDI: 0000000000000000 [ 166.985607][ T8690] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 166.993647][ T8690] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 167.001623][ T8690] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 167.009642][ T8690] [ 167.011954][ T8690] Uninit was stored to memory at: [ 167.016971][ T8690] kmsan_internal_chain_origin+0xad/0x130 [ 167.022745][ T8690] kmsan_memcpy_memmove_metadata+0x272/0x2e0 [ 167.030889][ T8690] kmsan_memcpy_metadata+0xb/0x10 [ 167.036421][ T8690] __msan_memcpy+0x43/0x50 [ 167.040952][ T8690] bcm_send_to_user+0x260/0x890 [ 167.045826][ T8690] bcm_tx_timeout_handler+0x6f4/0x740 [ 167.051194][ T8690] __run_hrtimer+0x7cd/0xf00 [ 167.055770][ T8690] hrtimer_run_softirq+0x3bf/0x690 [ 167.060874][ T8690] __do_softirq+0x2ea/0x7f5 [ 167.065365][ T8690] [ 167.067677][ T8690] Local variable ----msg_head@bcm_tx_timeout_handler created at: [ 167.076071][ T8690] bcm_tx_timeout_handler+0x4f/0x740 [ 167.081335][ T8690] bcm_tx_timeout_handler+0x4f/0x740 [ 167.086598][ T8690] [ 167.088907][ T8690] Bytes 12-15 of 50 are uninitialized [ 167.094271][ T8690] Memory access of size 50 starts at ffff888108f51800 [ 167.101325][ T8690] Data copied to user address 0000000020000040 [ 167.107448][ T8690] ===================================================== [ 167.114354][ T8690] Disabling lock debugging due to kernel taint [ 167.120503][ T8690] Kernel panic - not syncing: panic_on_warn set ... [ 167.127071][ T8690] CPU: 0 PID: 8690 Comm: syz-executor155 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 167.137108][ T8690] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 167.147683][ T8690] Call Trace: [ 167.150980][ T8690] dump_stack+0x21c/0x280 [ 167.155297][ T8690] panic+0x4d7/0xef7 [ 167.159532][ T8690] ? add_taint+0x17c/0x210 [ 167.163941][ T8690] kmsan_report+0x1df/0x1e0 [ 167.168444][ T8690] kmsan_internal_check_memory+0x238/0x3d0 [ 167.174233][ T8690] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 167.180018][ T8690] ? kmsan_get_metadata+0x116/0x180 [ 167.185215][ T8690] kmsan_copy_to_user+0x81/0x90 [ 167.190050][ T8690] _copy_to_iter+0x626/0x2de0 [ 167.194708][ T8690] ? sock_load_diag_module+0x3c0/0x3c0 [ 167.200181][ T8690] bcm_recvmsg+0x2ca/0x8e0 [ 167.204583][ T8690] ? bcm_sendmsg+0xa190/0xa190 [ 167.209330][ T8690] __sys_recvfrom+0x69a/0xa10 [ 167.214015][ T8690] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 167.220072][ T8690] __se_compat_sys_recvfrom+0x122/0x150 [ 167.225678][ T8690] __ia32_compat_sys_recvfrom+0x6e/0x90 [ 167.231227][ T8690] __do_fast_syscall_32+0x2af/0x480 [ 167.236414][ T8690] do_fast_syscall_32+0x6b/0xd0 [ 167.241248][ T8690] do_SYSENTER_32+0x73/0x90 [ 167.245733][ T8690] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 167.252039][ T8690] RIP: 0023:0xf7f7d549 [ 167.256081][ T8690] Code: Bad RIP value. [ 167.260124][ T8690] RSP: 002b:00000000f7f781dc EFLAGS: 00000292 ORIG_RAX: 0000000000000173 [ 167.268678][ T8690] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000040 [ 167.276742][ T8690] RDX: 0000000000000032 RSI: 0000000000000000 RDI: 0000000000000000 [ 167.284705][ T8690] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 167.292661][ T8690] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 167.300616][ T8690] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 167.310676][ T8690] Kernel Offset: disabled [ 167.315344][ T8690] Rebooting in 86400 seconds..