[ 73.275682][ T27] audit: type=1800 audit(1581018692.001:26): pid=9802 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. [ 74.447955][ T27] kauditd_printk_skb: 2 callbacks suppressed [ 74.447966][ T27] audit: type=1800 audit(1581018693.201:29): pid=9802 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 [ 74.475304][ T27] audit: type=1800 audit(1581018693.201:30): pid=9802 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 '10.128.0.175' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 85.306423][ T9954] IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready [ 85.326694][ T9954] general protection fault, probably for non-canonical address 0xdffffc0000000056: 0000 [#1] PREEMPT SMP KASAN [ 85.338444][ T9954] KASAN: null-ptr-deref in range [0x00000000000002b0-0x00000000000002b7] [ 85.346919][ T9954] CPU: 0 PID: 9954 Comm: syz-executor259 Not tainted 5.5.0-syzkaller #0 [ 85.355232][ T9954] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.365411][ T9954] RIP: 0010:inet6_set_link_af+0x66e/0xae0 [ 85.371147][ T9954] 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 [ 85.390748][ T9954] RSP: 0018:ffffc9000c1fed40 EFLAGS: 00010206 [ 85.396807][ T9954] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86dfb9a6 [ 85.405304][ T9954] RDX: 0000000000000056 RSI: ffffffff86dfbe74 RDI: 00000000000002b0 [ 85.413307][ T9954] RBP: ffffc9000c1fee70 R08: ffff8880a4692380 R09: ffffc9000c1fedb0 [ 85.421319][ T9954] R10: fffff5200183fdbe R11: ffffc9000c1fedf7 R12: 0000000000000000 [ 85.429517][ T9954] R13: 0000000000000000 R14: ffff8880966da824 R15: dffffc0000000000 [ 85.437495][ T9954] FS: 00000000021b9880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 85.446443][ T9954] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.453017][ T9954] CR2: 0000561936985110 CR3: 00000000a0109000 CR4: 00000000001406f0 [ 85.460983][ T9954] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 85.469046][ T9954] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 85.477059][ T9954] Call Trace: [ 85.480345][ T9954] ? addrconf_sysctl_disable+0x700/0x700 [ 85.486094][ T9954] ? mark_held_locks+0xf0/0xf0 [ 85.490959][ T9954] ? lock_acquire+0x190/0x410 [ 85.495749][ T9954] ? do_setlink+0x2961/0x3720 [ 85.500426][ T9954] do_setlink+0x2a9f/0x3720 [ 85.504931][ T9954] ? do_setlink+0x2a9f/0x3720 [ 85.509913][ T9954] ? rtnl_getlink+0xb50/0xb50 [ 85.514589][ T9954] ? __kasan_check_read+0x11/0x20 [ 85.519606][ T9954] ? __lock_acquire+0x8a0/0x4a00 [ 85.524668][ T9954] ? __kasan_check_read+0x11/0x20 [ 85.529698][ T9954] ? __nla_parse+0x43/0x60 [ 85.534173][ T9954] ? validate_linkmsg+0x4be/0x7d0 [ 85.539247][ T9954] ? find_held_lock+0x35/0x130 [ 85.544022][ T9954] ? validate_linkmsg+0x4be/0x7d0 [ 85.549047][ T9954] ? lock_downgrade+0x920/0x920 [ 85.553903][ T9954] ? __kasan_check_read+0x11/0x20 [ 85.558943][ T9954] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.565964][ T9954] __rtnl_newlink+0xdd1/0x1790 [ 85.570847][ T9954] ? lock_downgrade+0x920/0x920 [ 85.575743][ T9954] ? __check_heap_object+0x33/0xb3 [ 85.580908][ T9954] ? rtnl_link_unregister+0x250/0x250 [ 85.586392][ T9954] ? is_bpf_image_address+0x1da/0x290 [ 85.591765][ T9954] ? __kernel_text_address+0xd/0x40 [ 85.597073][ T9954] ? unwind_get_return_address+0x61/0xa0 [ 85.602702][ T9954] ? profile_setup.cold+0xbb/0xbb [ 85.607943][ T9954] ? arch_stack_walk+0x97/0xf0 [ 85.612712][ T9954] ? stack_trace_save+0x8f/0xc0 [ 85.617713][ T9954] ? stack_trace_consume_entry+0x170/0x170 [ 85.623514][ T9954] ? is_bpf_image_address+0x1b8/0x290 [ 85.629004][ T9954] ? save_stack+0x5c/0x90 [ 85.633391][ T9954] ? save_stack+0x23/0x90 [ 85.637718][ T9954] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 85.643763][ T9954] ? rtnl_newlink+0x4b/0xa0 [ 85.648296][ T9954] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 85.653837][ T9954] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 85.659814][ T9954] ? kasan_unpoison_shadow+0x20/0x50 [ 85.665173][ T9954] ? kmem_cache_alloc_trace+0x397/0x790 [ 85.670736][ T9954] rtnl_newlink+0x69/0xa0 [ 85.675054][ T9954] ? __rtnl_newlink+0x1790/0x1790 [ 85.680092][ T9954] rtnetlink_rcv_msg+0x45e/0xaf0 [ 85.685018][ T9954] ? rtnl_bridge_getlink+0x910/0x910 [ 85.690315][ T9954] ? lock_downgrade+0x920/0x920 [ 85.695166][ T9954] ? netlink_deliver_tap+0x226/0xbf0 [ 85.700445][ T9954] ? find_held_lock+0x35/0x130 [ 85.705313][ T9954] netlink_rcv_skb+0x177/0x450 [ 85.710077][ T9954] ? rtnl_bridge_getlink+0x910/0x910 [ 85.715370][ T9954] ? netlink_ack+0xb50/0xb50 [ 85.720056][ T9954] ? __kasan_check_read+0x11/0x20 [ 85.725085][ T9954] ? netlink_deliver_tap+0x248/0xbf0 [ 85.730372][ T9954] rtnetlink_rcv+0x1d/0x30 [ 85.734773][ T9954] netlink_unicast+0x59e/0x7e0 [ 85.739763][ T9954] ? netlink_attachskb+0x870/0x870 [ 85.744878][ T9954] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 85.750590][ T9954] ? __check_object_size+0x3d/0x437 [ 85.755781][ T9954] netlink_sendmsg+0x91c/0xea0 [ 85.760563][ T9954] ? netlink_unicast+0x7e0/0x7e0 [ 85.765493][ T9954] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 85.771035][ T9954] ? apparmor_socket_sendmsg+0x2a/0x30 [ 85.776666][ T9954] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.782895][ T9954] ? security_socket_sendmsg+0x8d/0xc0 [ 85.788449][ T9954] ? netlink_unicast+0x7e0/0x7e0 [ 85.793534][ T9954] sock_sendmsg+0xd7/0x130 [ 85.797946][ T9954] ____sys_sendmsg+0x753/0x880 [ 85.802711][ T9954] ? kernel_sendmsg+0x50/0x50 [ 85.807379][ T9954] ___sys_sendmsg+0x100/0x170 [ 85.812043][ T9954] ? sendmsg_copy_msghdr+0x70/0x70 [ 85.817250][ T9954] ? do_huge_pmd_anonymous_page+0xceb/0x1a50 [ 85.823346][ T9954] ? prep_transhuge_page+0xa0/0xa0 [ 85.828468][ T9954] ? do_page_fault+0x579/0x12e1 [ 85.833359][ T9954] ? find_held_lock+0x35/0x130 [ 85.838228][ T9954] ? do_page_fault+0x579/0x12e1 [ 85.843128][ T9954] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.849547][ T9954] ? __fget_light+0x1ad/0x270 [ 85.854207][ T9954] ? __fdget+0x1b/0x20 [ 85.858282][ T9954] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 85.864635][ T9954] __sys_sendmsg+0x105/0x1d0 [ 85.869222][ T9954] ? __sys_sendmsg_sock+0xc0/0xc0 [ 85.874246][ T9954] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 85.879708][ T9954] ? do_syscall_64+0x26/0x790 [ 85.884375][ T9954] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.890431][ T9954] ? do_syscall_64+0x26/0x790 [ 85.895307][ T9954] __x64_sys_sendmsg+0x78/0xb0 [ 85.900196][ T9954] do_syscall_64+0xfa/0x790 [ 85.904813][ T9954] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.910733][ T9954] RIP: 0033:0x4402e9 [ 85.914617][ T9954] 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 [ 85.934650][ T9954] RSP: 002b:00007ffe6f0b1e38 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 85.943159][ T9954] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402e9 [ 85.951485][ T9954] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 [ 85.959465][ T9954] RBP: 00000000006ca018 R08: 0000000000000008 R09: 00000000004002c8 [ 85.967602][ T9954] R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000401b70 [ 85.975564][ T9954] R13: 0000000000401c00 R14: 0000000000000000 R15: 0000000000000000 [ 85.983529][ T9954] Modules linked in: [ 86.010148][ T9954] ---[ end trace ea9b3658add04ef3 ]--- [ 86.015890][ T9954] RIP: 0010:inet6_set_link_af+0x66e/0xae0 [ 86.021747][ T9954] 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 [ 86.041518][ T9954] RSP: 0018:ffffc9000c1fed40 EFLAGS: 00010206 [ 86.047633][ T9954] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86dfb9a6 [ 86.055657][ T9954] RDX: 0000000000000056 RSI: ffffffff86dfbe74 RDI: 00000000000002b0 [ 86.063649][ T9954] RBP: ffffc9000c1fee70 R08: ffff8880a4692380 R09: ffffc9000c1fedb0 [ 86.071697][ T9954] R10: fffff5200183fdbe R11: ffffc9000c1fedf7 R12: 0000000000000000 [ 86.079751][ T9954] R13: 0000000000000000 R14: ffff8880966da824 R15: dffffc0000000000 [ 86.087994][ T9954] FS: 00000000021b9880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 86.097811][ T9954] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 86.104597][ T9954] CR2: 0000561936985110 CR3: 00000000a0109000 CR4: 00000000001406f0 [ 86.112649][ T9954] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 86.120667][ T9954] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 86.128693][ T9954] Kernel panic - not syncing: Fatal exception [ 86.136024][ T9954] Kernel Offset: disabled [ 86.140505][ T9954] Rebooting in 86400 seconds..