Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 11.289427] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 12.407432] random: crng init done Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.104' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 22.798862] IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready [ 22.800721] qtaguid: iface_stat: create6(lo): no inet dev [ 22.802602] IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready [ 22.803987] qtaguid: iface_stat: create6(lo): no inet dev [ 22.805825] IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready [ 22.807951] qtaguid: iface_stat: create6(lo): no inet dev [ 22.809716] IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready [ 22.811499] qtaguid: iface_stat: create6(lo): no inet dev [ 22.816580] syz-executor235 (2047) used greatest stack depth: 23832 bytes left [ 22.818194] IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready [ 22.818228] qtaguid: iface_stat: create6(lo): no inet dev [ 22.823651] IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready [ 22.823689] qtaguid: iface_stat: create6(lo): no inet dev [ 22.829239] IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready executing program executing program executing program executing program executing program [ 22.829271] qtaguid: iface_stat: create6(lo): no inet dev [ 22.854587] IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready [ 22.880054] qtaguid: iface_stat: create6(lo): no inet dev [ 22.885858] ------------[ cut here ]------------ [ 22.890762] WARNING: CPU: 1 PID: 2061 at net/ipv6/ip6_fib.c:1477 fib6_del+0x946/0xb10 [ 22.898763] Kernel panic - not syncing: panic_on_warn set ... [ 22.898763] [ 22.906133] CPU: 1 PID: 2061 Comm: syz-executor235 Not tainted 4.9.141+ #23 [ 22.913230] ffff8801ce82e918 ffffffff81b42e79 ffffffff82a38ce0 00000000ffffffff [ 22.921320] ffffffff82cc1e00 0000000000000001 0000000000000009 ffff8801ce82e9d8 [ 22.929421] ffffffff813f7125 0000000041b58ab3 ffffffff82e2b62b ffffffff813f6f66 [ 22.937531] Call Trace: [ 22.940122] [] dump_stack+0xc1/0x128 [ 22.945489] [] panic+0x1bf/0x39f [ 22.950531] [] ? add_taint.cold.5+0x16/0x16 [ 22.956507] [] ? trace_hardirqs_on+0xd/0x10 [ 22.962487] [] ? _find_next_bit.part.0+0xe0/0x120 [ 22.968984] [] ? __warn.cold.8+0x14/0x2f [ 22.974769] [] ? fib6_del+0x946/0xb10 [ 22.980330] [] __warn.cold.8+0x2f/0x2f [ 22.985877] [] warn_slowpath_null+0x2c/0x40 [ 22.991882] [] fib6_del+0x946/0xb10 [ 22.997205] [] fib6_clean_node+0x220/0x4c0 [ 23.003109] [] ? fib6_del+0xb10/0xb10 [ 23.008571] [] ? __local_bh_enable_ip+0x6a/0xe0 [ 23.014905] [] ? trace_hardirqs_on_caller+0x266/0x590 [ 23.021770] [] ? fib6_walker_link+0xf6/0x140 [ 23.027851] [] fib6_walk_continue+0x3e5/0x640 [ 23.034010] [] ? fib6_remove_prefsrc+0x240/0x240 [ 23.040427] [] fib6_walk+0x91/0xf0 [ 23.045630] [] fib6_clean_tree+0xd3/0x110 [ 23.051441] [] ? fib6_walk+0xf0/0xf0 [ 23.056834] [] ? fib6_del+0xb10/0xb10 [ 23.062290] [] ? fib6_remove_prefsrc+0x240/0x240 [ 23.068721] [] __fib6_clean_all+0xf9/0x220 [ 23.074618] [] ? fib6_clean_tree+0x110/0x110 [ 23.080689] [] ? fib6_remove_prefsrc+0x240/0x240 [ 23.087292] [] ? fib6_remove_prefsrc+0x240/0x240 [ 23.093718] [] fib6_clean_all+0x27/0x30 [ 23.099474] [] rt6_ifdown+0xa1/0x7f0 [ 23.104843] [] ? consume_skb+0xd3/0x340 [ 23.110473] [] ? netlink_broadcast_filtered+0x307/0x9f0 [ 23.117491] [] ? rt6_clean_tohost+0x30/0x30 [ 23.123472] [] addrconf_ifdown+0xd0/0x1420 [ 23.129364] [] ? nlmsg_notify+0xe7/0x140 [ 23.135080] [] ? add_addr+0x180/0x180 [ 23.140625] [] ? rtnl_notify+0xbb/0xe0 [ 23.146166] [] addrconf_notify+0x8ee/0x2140 [ 23.152137] [] ? rtnl_is_locked+0x9/0x20 [ 23.157854] [] ? inet6_ifinfo_notify+0x140/0x140 [ 23.164266] [] ? nfqnl_rcv_dev_event+0x27/0x290 [ 23.170592] [] ? ndisc_netdev_event+0x27d/0x350 [ 23.176915] [] notifier_call_chain+0xb4/0x1d0 [ 23.183064] [] raw_notifier_call_chain+0x2d/0x40 [ 23.189479] [] call_netdevice_notifiers_info+0x55/0x70 [ 23.196406] [] netdev_state_change+0xdd/0x100 [ 23.202687] [] ? dev_get_valid_name+0x160/0x160 [ 23.209009] [] ? dev_change_flags+0xf8/0x140 [ 23.215067] [] do_setlink+0x2596/0x2ef0 [ 23.220697] [] ? depot_save_stack+0x11c/0x470 [ 23.226842] [] ? rtnl_link_get_net+0x150/0x150 [ 23.233079] [] ? trace_hardirqs_on+0x10/0x10 [ 23.239291] [] ? update_stack_state.constprop.2+0x7c/0x170 [ 23.246565] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 23.253327] [] ? check_preemption_disabled+0x3b/0x200 [ 23.260174] [] ? avc_has_perm_noaudit+0x170/0x2f0 [ 23.266885] [] ? avc_has_perm_noaudit+0x197/0x2f0 [ 23.273381] [] ? avc_has_perm_noaudit+0x90/0x2f0 [ 23.279790] [] ? validate_nla+0x1bb/0x4b0 [ 23.285597] [] ? nla_parse+0x1d3/0x240 [ 23.291139] [] rtnl_setlink+0x210/0x310 [ 23.296765] [] ? do_setlink+0x2ef0/0x2ef0 [ 23.302573] [] ? ns_capable_common+0x110/0x150 [ 23.308937] [] ? __netlink_ns_capable+0xf1/0x120 [ 23.315351] [] ? do_setlink+0x2ef0/0x2ef0 [ 23.321222] [] rtnetlink_rcv_msg+0x49c/0x650 [ 23.327283] [] ? rtnl_newlink+0x1550/0x1550 [ 23.333371] [] ? rtnetlink_rcv+0x1b/0x40 [ 23.339091] [] ? mutex_trylock+0x3e0/0x3e0 [ 23.344981] [] netlink_rcv_skb+0x145/0x370 [ 23.350870] [] ? rtnl_newlink+0x1550/0x1550 [ 23.356844] [] rtnetlink_rcv+0x2a/0x40 [ 23.362388] [] netlink_unicast+0x4d8/0x6d0 [ 23.368387] [] ? netlink_sendskb+0x50/0x50 [ 23.374382] [] netlink_sendmsg+0x694/0xc30 [ 23.380452] [] ? avc_has_perm+0x9e/0x3a0 [ 23.386299] [] ? nlmsg_notify+0x140/0x140 [ 23.392240] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 23.398810] [] ? security_socket_sendmsg+0x8f/0xc0 [ 23.405388] [] ? nlmsg_notify+0x140/0x140 [ 23.411279] [] sock_sendmsg+0xbb/0x110 [ 23.416815] [] sock_write_iter+0x223/0x3b0 [ 23.422780] [] ? sock_sendmsg+0x110/0x110 [ 23.428654] [] ? __might_sleep+0x95/0x1a0 [ 23.434450] [] ? compat_rw_copy_check_uvector+0x263/0x380 [ 23.441626] [] do_iter_readv_writev+0x3cb/0x4b0 [ 23.447936] [] ? vfs_iter_write+0x450/0x450 [ 23.453898] [] ? rw_verify_area+0xe5/0x2a0 [ 23.459769] [] compat_do_readv_writev+0x2fc/0x7b0 [ 23.466250] [] ? check_preemption_disabled+0x3b/0x200 [ 23.473082] [] ? do_pwritev+0x240/0x240 [ 23.478695] [] ? __lru_cache_add+0x187/0x250 [ 23.484910] [] ? __this_cpu_preempt_check+0x1c/0x20 [ 23.491565] [] ? handle_mm_fault+0x54b/0x2350 [ 23.497745] [] ? vm_insert_page+0x6f0/0x6f0 [ 23.503708] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 23.510458] [] compat_writev+0xe5/0x150 [ 23.516089] [] do_compat_writev+0xf2/0x1d0 [ 23.521983] [] ? compat_writev+0x150/0x150 [ 23.527854] [] ? up_read+0x1a/0x40 [ 23.533047] [] ? __do_page_fault+0x554/0xa60 [ 23.539099] [] ? move_addr_to_kernel+0x50/0x50 [ 23.545321] [] compat_SyS_writev+0x26/0x30 [ 23.551194] [] ? compat_SyS_preadv2+0x90/0x90 [ 23.557335] [] do_fast_syscall_32+0x2f1/0xa10 [ 23.563477] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 23.570130] [] entry_SYSENTER_compat+0x90/0xa2 [ 23.577133] Kernel Offset: disabled [ 23.580850] Rebooting in 86400 seconds..