[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 75.714140][ T30] audit: type=1800 audit(1565994639.764:25): pid=11363 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 75.752274][ T30] audit: type=1800 audit(1565994639.784:26): pid=11363 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 75.772445][ T30] audit: type=1800 audit(1565994639.794:27): pid=11363 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 81.165977][T11505] scp (11505) used greatest stack depth: 52504 bytes left Warning: Permanently added '10.128.10.22' (ECDSA) to the list of known hosts. [ 92.713984][T11515] IPVS: ftp: loaded support on port[0] = 21 [ 92.790197][T11515] chnl_net:caif_netlink_parms(): no params data found [ 92.823324][T11515] bridge0: port 1(bridge_slave_0) entered blocking state [ 92.830550][T11515] bridge0: port 1(bridge_slave_0) entered disabled state [ 92.838757][T11515] device bridge_slave_0 entered promiscuous mode [ 92.846957][T11515] bridge0: port 2(bridge_slave_1) entered blocking state [ 92.854292][T11515] bridge0: port 2(bridge_slave_1) entered disabled state [ 92.862500][T11515] device bridge_slave_1 entered promiscuous mode [ 92.883299][T11515] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 92.894691][T11515] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 92.916300][T11515] team0: Port device team_slave_0 added [ 92.923816][T11515] team0: Port device team_slave_1 added [ 92.984408][T11515] device hsr_slave_0 entered promiscuous mode [ 93.032384][T11515] device hsr_slave_1 entered promiscuous mode [ 93.112773][T11515] bridge0: port 2(bridge_slave_1) entered blocking state [ 93.119877][T11515] bridge0: port 2(bridge_slave_1) entered forwarding state [ 93.127735][T11515] bridge0: port 1(bridge_slave_0) entered blocking state [ 93.134898][T11515] bridge0: port 1(bridge_slave_0) entered forwarding state [ 93.180574][T11515] 8021q: adding VLAN 0 to HW filter on device bond0 [ 93.195055][ T31] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 93.204459][ T31] bridge0: port 1(bridge_slave_0) entered disabled state [ 93.213245][ T31] bridge0: port 2(bridge_slave_1) entered disabled state [ 93.222205][ T31] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 93.236236][T11515] 8021q: adding VLAN 0 to HW filter on device team0 [ 93.248523][ T3919] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 93.257646][ T3919] bridge0: port 1(bridge_slave_0) entered blocking state [ 93.264769][ T3919] bridge0: port 1(bridge_slave_0) entered forwarding state [ 93.278289][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 93.287190][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 93.294436][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 93.317445][ T3919] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 93.327461][ T3919] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 93.340035][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 93.353423][ T3919] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 93.367221][T11515] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 93.379233][T11515] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 93.388238][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 93.413098][T11515] 8021q: adding VLAN 0 to HW filter on device batadv0 executing program [ 93.457456][T11524] netlink: 'syz-executor975': attribute type 10 has an invalid length. [ 93.466724][T11524] batman_adv: batadv0: Adding interface: veth0_to_hsr [ 93.473932][T11524] batman_adv: batadv0: The MTU of interface veth0_to_hsr 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. [ 93.499916][T11524] batman_adv: batadv0: Interface activated: veth0_to_hsr executing program executing program executing program [ 93.516328][T11525] netlink: 'syz-executor975': attribute type 10 has an invalid length. [ 93.531148][T11526] netlink: 'syz-executor975': attribute type 10 has an invalid length. [ 93.545931][T11527] netlink: 'syz-executor975': attribute type 10 has an invalid length. executing program executing program executing program executing program [ 93.559884][T11528] netlink: 'syz-executor975': attribute type 10 has an invalid length. [ 93.573940][T11529] netlink: 'syz-executor975': attribute type 10 has an invalid length. [ 93.587861][T11530] netlink: 'syz-executor975': attribute type 10 has an invalid length. [ 93.601449][T11531] netlink: 'syz-executor975': attribute type 10 has an invalid length. executing program executing program executing program executing program executing program executing program executing program executing program [ 93.615654][T11532] netlink: 'syz-executor975': attribute type 10 has an invalid length. [ 93.629088][T11533] netlink: 'syz-executor975': attribute type 10 has an invalid length. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 94.586676][ T290] ================================================================== [ 94.594783][ T290] BUG: KMSAN: uninit-value in batadv_iv_send_outstanding_bat_ogm_packet+0x6cd/0xcc0 [ 94.604138][ T290] CPU: 1 PID: 290 Comm: kworker/u4:7 Not tainted 5.3.0-rc3+ #17 [ 94.611745][ T290] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 94.621791][ T290] Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet [ 94.629574][ T290] Call Trace: [ 94.632856][ T290] dump_stack+0x191/0x1f0 [ 94.637174][ T290] kmsan_report+0x162/0x2d0 [ 94.641671][ T290] __msan_warning+0x75/0xe0 [ 94.646169][ T290] batadv_iv_send_outstanding_bat_ogm_packet+0x6cd/0xcc0 [ 94.653191][ T290] ? batadv_iv_ogm_queue_add+0x1780/0x1780 [ 94.658987][ T290] process_one_work+0x1572/0x1ef0 [ 94.664012][ T290] worker_thread+0x111b/0x2460 [ 94.668778][ T290] kthread+0x4b5/0x4f0 [ 94.672830][ T290] ? process_one_work+0x1ef0/0x1ef0 [ 94.678013][ T290] ? kthread_blkcg+0xf0/0xf0 [ 94.682606][ T290] ret_from_fork+0x35/0x40 [ 94.687008][ T290] [ 94.689317][ T290] Uninit was created at: [ 94.693544][ T290] kmsan_save_stack_with_flags+0x37/0x70 [ 94.699158][ T290] kmsan_internal_alloc_meta_for_pages+0x123/0x510 [ 94.705637][ T290] kmsan_alloc_page+0x7a/0xf0 [ 94.710294][ T290] __alloc_pages_nodemask+0x142d/0x5fa0 [ 94.715822][ T290] page_frag_alloc+0x35b/0x890 [ 94.720572][ T290] __napi_alloc_skb+0x195/0x980 [ 94.725404][ T290] page_to_skb+0x134/0x1150 [ 94.729891][ T290] receive_buf+0xe7b/0x8810 [ 94.734396][ T290] virtnet_poll+0x666/0x19d0 [ 94.739057][ T290] net_rx_action+0x74b/0x1950 [ 94.743720][ T290] __do_softirq+0x4a1/0x83a [ 94.748203][ T290] irq_exit+0x230/0x280 [ 94.752342][ T290] do_IRQ+0x20d/0x3a0 [ 94.756429][ T290] ret_from_intr+0x0/0x33 [ 94.760767][ T290] kmsan_get_shadow_origin_ptr+0x6/0x3a0 [ 94.766394][ T290] __msan_metadata_ptr_for_load_8+0x10/0x20 [ 94.772278][ T290] mark_page_accessed+0x30c/0xa00 [ 94.777297][ T290] __find_get_block+0x1681/0x19e0 [ 94.782309][ T290] __getblk_gfp+0xc5/0x1080 [ 94.786797][ T290] __ext4_get_inode_loc+0x647/0x1c80 [ 94.792067][ T290] ext4_reserve_inode_write+0x15d/0x430 [ 94.797592][ T290] ext4_mark_inode_dirty+0x2dd/0xca0 [ 94.802856][ T290] ext4_dirty_inode+0x187/0x1d0 [ 94.807701][ T290] __mark_inode_dirty+0x486/0x1380 [ 94.812797][ T290] generic_write_end+0x3f7/0x460 [ 94.817715][ T290] ext4_da_write_end+0x1050/0x1240 [ 94.822810][ T290] generic_perform_write+0x618/0x990 [ 94.828078][ T290] __generic_file_write_iter+0x421/0xa30 [ 94.833694][ T290] ext4_file_write_iter+0xc97/0x2010 [ 94.838958][ T290] __vfs_write+0xa2c/0xcb0 [ 94.843358][ T290] vfs_write+0x481/0x920 [ 94.847584][ T290] ksys_write+0x265/0x430 [ 94.851894][ T290] __se_sys_write+0x92/0xb0 [ 94.856379][ T290] __x64_sys_write+0x4a/0x70 [ 94.860955][ T290] do_syscall_64+0xbc/0xf0 [ 94.865356][ T290] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 94.871225][ T290] ================================================================== [ 94.879260][ T290] Disabling lock debugging due to kernel taint [ 94.885396][ T290] Kernel panic - not syncing: panic_on_warn set ... [ 94.891972][ T290] CPU: 1 PID: 290 Comm: kworker/u4:7 Tainted: G B 5.3.0-rc3+ #17 [ 94.900969][ T290] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 94.911019][ T290] Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet [ 94.918801][ T290] Call Trace: [ 94.922085][ T290] dump_stack+0x191/0x1f0 [ 94.926420][ T290] panic+0x3c9/0xc1e [ 94.930329][ T290] kmsan_report+0x2ca/0x2d0 [ 94.934823][ T290] __msan_warning+0x75/0xe0 [ 94.939318][ T290] batadv_iv_send_outstanding_bat_ogm_packet+0x6cd/0xcc0 [ 94.946338][ T290] ? batadv_iv_ogm_queue_add+0x1780/0x1780 [ 94.952140][ T290] process_one_work+0x1572/0x1ef0 [ 94.957178][ T290] worker_thread+0x111b/0x2460 [ 94.961946][ T290] kthread+0x4b5/0x4f0 [ 94.966000][ T290] ? process_one_work+0x1ef0/0x1ef0 [ 94.971184][ T290] ? kthread_blkcg+0xf0/0xf0 [ 94.975765][ T290] ret_from_fork+0x35/0x40 [ 94.981523][ T290] Kernel Offset: disabled [ 94.985842][ T290] Rebooting in 86400 seconds..