[ 87.624486][ T27] audit: type=1800 audit(1581092305.597:26): pid=9631 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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. [ 88.610484][ T27] kauditd_printk_skb: 2 callbacks suppressed [ 88.610498][ T27] audit: type=1800 audit(1581092306.597:29): pid=9631 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 88.637822][ T27] audit: type=1800 audit(1581092306.597:30): pid=9631 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.92' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 97.641525][ T9782] IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready [ 97.662622][ T9782] general protection fault, probably for non-canonical address 0xdffffc0000000056: 0000 [#1] PREEMPT SMP KASAN [ 97.674376][ T9782] KASAN: null-ptr-deref in range [0x00000000000002b0-0x00000000000002b7] [ 97.683763][ T9782] CPU: 0 PID: 9782 Comm: syz-executor731 Not tainted 5.5.0-syzkaller #0 [ 97.692073][ T9782] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.702124][ T9782] RIP: 0010:inet6_set_link_af+0x66e/0xae0 [ 97.707830][ T9782] Code: 38 d0 7f 08 84 c0 0f 85 20 03 00 00 48 8d bb b0 02 00 00 45 0f b6 64 24 04 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 1a 03 00 00 44 89 a3 b0 02 00 [ 97.727419][ T9782] RSP: 0018:ffffc90002086d40 EFLAGS: 00010206 [ 97.733469][ T9782] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86dfd9a6 [ 97.741424][ T9782] RDX: 0000000000000056 RSI: ffffffff86dfde74 RDI: 00000000000002b0 [ 97.749470][ T9782] RBP: ffffc90002086e70 R08: ffff888092058600 R09: ffffc90002086db0 [ 97.757514][ T9782] R10: fffff52000410dbe R11: ffffc90002086df7 R12: 0000000000000000 [ 97.765563][ T9782] R13: 0000000000000000 R14: ffff8880a7c2c424 R15: dffffc0000000000 [ 97.773525][ T9782] FS: 0000000002526880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 97.782487][ T9782] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 97.789052][ T9782] CR2: 0000559fd69d10f0 CR3: 000000009ed82000 CR4: 00000000001406f0 [ 97.797005][ T9782] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 97.804964][ T9782] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 97.812950][ T9782] Call Trace: [ 97.816225][ T9782] ? addrconf_sysctl_disable+0x700/0x700 [ 97.821841][ T9782] ? mark_held_locks+0xf0/0xf0 [ 97.826733][ T9782] ? lock_acquire+0x190/0x410 [ 97.831400][ T9782] ? do_setlink+0x2961/0x3720 [ 97.836091][ T9782] do_setlink+0x2a9f/0x3720 [ 97.840584][ T9782] ? do_setlink+0x2a9f/0x3720 [ 97.845244][ T9782] ? rtnl_getlink+0xb50/0xb50 [ 97.849914][ T9782] ? __kasan_check_read+0x11/0x20 [ 97.854926][ T9782] ? __lock_acquire+0x8a0/0x4a00 [ 97.859892][ T9782] ? __kasan_check_read+0x11/0x20 [ 97.864902][ T9782] ? __nla_parse+0x43/0x60 [ 97.869515][ T9782] ? validate_linkmsg+0x4be/0x7d0 [ 97.874516][ T9782] ? find_held_lock+0x35/0x130 [ 97.879263][ T9782] ? validate_linkmsg+0x4be/0x7d0 [ 97.884276][ T9782] ? lock_downgrade+0x920/0x920 [ 97.889120][ T9782] ? __kasan_check_read+0x11/0x20 [ 97.894162][ T9782] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.900388][ T9782] __rtnl_newlink+0xdd1/0x1790 [ 97.905228][ T9782] ? lock_downgrade+0x920/0x920 [ 97.910068][ T9782] ? __check_heap_object+0x33/0xb3 [ 97.915170][ T9782] ? rtnl_link_unregister+0x250/0x250 [ 97.920527][ T9782] ? is_bpf_image_address+0x1da/0x290 [ 97.925879][ T9782] ? __kernel_text_address+0xd/0x40 [ 97.931078][ T9782] ? unwind_get_return_address+0x61/0xa0 [ 97.936698][ T9782] ? profile_setup.cold+0xbb/0xbb [ 97.941718][ T9782] ? arch_stack_walk+0x97/0xf0 [ 97.946483][ T9782] ? stack_trace_save+0x8f/0xc0 [ 97.951354][ T9782] ? stack_trace_consume_entry+0x170/0x170 [ 97.957140][ T9782] ? is_bpf_image_address+0x1b8/0x290 [ 97.962504][ T9782] ? save_stack+0x5c/0x90 [ 97.966946][ T9782] ? save_stack+0x23/0x90 [ 97.971257][ T9782] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 97.977069][ T9782] ? rtnl_newlink+0x4b/0xa0 [ 97.981570][ T9782] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 97.987107][ T9782] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 97.993087][ T9782] ? kasan_unpoison_shadow+0x20/0x50 [ 97.998477][ T9782] ? kmem_cache_alloc_trace+0x397/0x790 [ 98.005149][ T9782] rtnl_newlink+0x69/0xa0 [ 98.009531][ T9782] ? __rtnl_newlink+0x1790/0x1790 [ 98.014538][ T9782] rtnetlink_rcv_msg+0x45e/0xaf0 [ 98.019473][ T9782] ? rtnl_bridge_getlink+0x910/0x910 [ 98.024768][ T9782] ? lock_downgrade+0x920/0x920 [ 98.029644][ T9782] ? netlink_deliver_tap+0x226/0xbf0 [ 98.035022][ T9782] ? find_held_lock+0x35/0x130 [ 98.039770][ T9782] netlink_rcv_skb+0x177/0x450 [ 98.044526][ T9782] ? rtnl_bridge_getlink+0x910/0x910 [ 98.049825][ T9782] ? netlink_ack+0xb50/0xb50 [ 98.054540][ T9782] ? __kasan_check_read+0x11/0x20 [ 98.059558][ T9782] ? netlink_deliver_tap+0x248/0xbf0 [ 98.064834][ T9782] rtnetlink_rcv+0x1d/0x30 [ 98.069242][ T9782] netlink_unicast+0x59e/0x7e0 [ 98.074079][ T9782] ? netlink_attachskb+0x870/0x870 [ 98.079172][ T9782] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 98.084872][ T9782] ? __check_object_size+0x3d/0x437 [ 98.090061][ T9782] netlink_sendmsg+0x91c/0xea0 [ 98.094812][ T9782] ? netlink_unicast+0x7e0/0x7e0 [ 98.099742][ T9782] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 98.105291][ T9782] ? apparmor_socket_sendmsg+0x2a/0x30 [ 98.110741][ T9782] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 98.117230][ T9782] ? security_socket_sendmsg+0x8d/0xc0 [ 98.122720][ T9782] ? netlink_unicast+0x7e0/0x7e0 [ 98.127657][ T9782] sock_sendmsg+0xd7/0x130 [ 98.132056][ T9782] ____sys_sendmsg+0x753/0x880 [ 98.136805][ T9782] ? kernel_sendmsg+0x50/0x50 [ 98.141476][ T9782] ___sys_sendmsg+0x100/0x170 [ 98.146142][ T9782] ? sendmsg_copy_msghdr+0x70/0x70 [ 98.151293][ T9782] ? do_huge_pmd_anonymous_page+0xceb/0x1a50 [ 98.157266][ T9782] ? prep_transhuge_page+0xa0/0xa0 [ 98.162404][ T9782] ? do_page_fault+0x579/0x12e1 [ 98.167286][ T9782] ? find_held_lock+0x35/0x130 [ 98.172035][ T9782] ? do_page_fault+0x579/0x12e1 [ 98.176910][ T9782] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 98.183159][ T9782] ? __fget_light+0x1ad/0x270 [ 98.187828][ T9782] ? __fdget+0x1b/0x20 [ 98.191879][ T9782] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 98.198115][ T9782] __sys_sendmsg+0x105/0x1d0 [ 98.202830][ T9782] ? __sys_sendmsg_sock+0xc0/0xc0 [ 98.207874][ T9782] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 98.213317][ T9782] ? do_syscall_64+0x26/0x790 [ 98.217976][ T9782] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 98.224023][ T9782] ? do_syscall_64+0x26/0x790 [ 98.228778][ T9782] __x64_sys_sendmsg+0x78/0xb0 [ 98.233543][ T9782] do_syscall_64+0xfa/0x790 [ 98.238043][ T9782] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 98.243926][ T9782] RIP: 0033:0x4402e9 [ 98.247810][ T9782] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 98.267947][ T9782] RSP: 002b:00007ffd88d35408 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 98.276380][ T9782] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402e9 [ 98.284339][ T9782] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 [ 98.292310][ T9782] RBP: 00000000006ca018 R08: 0000000000000008 R09: 00000000004002c8 [ 98.300273][ T9782] R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000401b70 [ 98.308233][ T9782] R13: 0000000000401c00 R14: 0000000000000000 R15: 0000000000000000 [ 98.316195][ T9782] Modules linked in: [ 98.348355][ T9782] ---[ end trace 0a6daff1bc218347 ]--- [ 98.353900][ T9782] RIP: 0010:inet6_set_link_af+0x66e/0xae0 [ 98.359618][ T9782] Code: 38 d0 7f 08 84 c0 0f 85 20 03 00 00 48 8d bb b0 02 00 00 45 0f b6 64 24 04 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 1a 03 00 00 44 89 a3 b0 02 00 [ 98.379317][ T9782] RSP: 0018:ffffc90002086d40 EFLAGS: 00010206 [ 98.385425][ T9782] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86dfd9a6 [ 98.393452][ T9782] RDX: 0000000000000056 RSI: ffffffff86dfde74 RDI: 00000000000002b0 [ 98.401574][ T9782] RBP: ffffc90002086e70 R08: ffff888092058600 R09: ffffc90002086db0 [ 98.409596][ T9782] R10: fffff52000410dbe R11: ffffc90002086df7 R12: 0000000000000000 [ 98.417737][ T9782] R13: 0000000000000000 R14: ffff8880a7c2c424 R15: dffffc0000000000 [ 98.425792][ T9782] FS: 0000000002526880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 98.434963][ T9782] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 98.441578][ T9782] CR2: 0000559fd69d10f0 CR3: 000000009ed82000 CR4: 00000000001406f0 [ 98.449666][ T9782] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 98.457703][ T9782] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 98.465706][ T9782] Kernel panic - not syncing: Fatal exception [ 98.473374][ T9782] Kernel Offset: disabled [ 98.477789][ T9782] Rebooting in 86400 seconds..