[ 86.321382][ T26] audit: type=1800 audit(1581228862.249:36): pid=10791 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[ 87.271547][ T26] audit: type=1400 audit(1581228863.329:37): avc: denied { watch } for pid=10879 comm="restorecond" path="/root/.ssh" dev="sda1" ino=16179 scontext=system_u:system_r:kernel_t:s0 tcontext=unconfined_u:object_r:ssh_home_t:s0 tclass=dir permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.81' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 96.095226][ T26] kauditd_printk_skb: 4 callbacks suppressed [ 96.095242][ T26] audit: type=1400 audit(1581228872.149:42): avc: denied { map } for pid=10982 comm="syz-executor436" path="/root/syz-executor436736224" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 96.108566][T10982] IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready [ 96.179306][T10982] general protection fault, probably for non-canonical address 0xdffffc0000000056: 0000 [#1] PREEMPT SMP KASAN [ 96.191074][T10982] KASAN: null-ptr-deref in range [0x00000000000002b0-0x00000000000002b7] [ 96.199490][T10982] CPU: 0 PID: 10982 Comm: syz-executor436 Not tainted 5.5.0-syzkaller #0 [ 96.207887][T10982] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 96.218000][T10982] RIP: 0010:inet6_set_link_af+0x66e/0xae0 [ 96.223702][T10982] 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 [ 96.243313][T10982] RSP: 0018:ffffc900058d6d40 EFLAGS: 00010206 [ 96.249408][T10982] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86e119a6 [ 96.257375][T10982] RDX: 0000000000000056 RSI: ffffffff86e11e74 RDI: 00000000000002b0 [ 96.265339][T10982] RBP: ffffc900058d6e70 R08: ffff888097f3c480 R09: ffffc900058d6db0 [ 96.273308][T10982] R10: fffff52000b1adbe R11: ffffc900058d6df7 R12: 0000000000000000 [ 96.281361][T10982] R13: 0000000000000000 R14: ffff8880a7d71c24 R15: dffffc0000000000 [ 96.289373][T10982] FS: 000000000075a880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 96.298291][T10982] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 96.304868][T10982] CR2: 000055666ccba008 CR3: 00000000a6f57000 CR4: 00000000001406f0 [ 96.312836][T10982] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 96.320785][T10982] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 96.328733][T10982] Call Trace: [ 96.332044][T10982] ? addrconf_sysctl_disable+0x700/0x700 [ 96.337660][T10982] ? mark_held_locks+0xf0/0xf0 [ 96.342407][T10982] ? lock_acquire+0x190/0x410 [ 96.347074][T10982] ? do_setlink+0x2961/0x3720 [ 96.351749][T10982] do_setlink+0x2a9f/0x3720 [ 96.356237][T10982] ? do_setlink+0x2a9f/0x3720 [ 96.360908][T10982] ? rtnl_getlink+0xb50/0xb50 [ 96.365592][T10982] ? __kasan_check_read+0x11/0x20 [ 96.370603][T10982] ? __lock_acquire+0x8a0/0x4a00 [ 96.375526][T10982] ? __lock_acquire+0x8a0/0x4a00 [ 96.380463][T10982] ? __nla_parse+0x43/0x60 [ 96.384890][T10982] ? validate_linkmsg+0x4be/0x7d0 [ 96.389966][T10982] ? find_held_lock+0x35/0x130 [ 96.394775][T10982] ? validate_linkmsg+0x4be/0x7d0 [ 96.399794][T10982] ? lock_downgrade+0x920/0x920 [ 96.404639][T10982] ? __kasan_check_read+0x11/0x20 [ 96.409659][T10982] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.416056][T10982] __rtnl_newlink+0xdd1/0x1790 [ 96.420822][T10982] ? lock_downgrade+0x920/0x920 [ 96.425735][T10982] ? __kasan_check_read+0x13/0x20 [ 96.430766][T10982] ? rtnl_link_unregister+0x250/0x250 [ 96.436168][T10982] ? is_bpf_image_address+0x1da/0x290 [ 96.441538][T10982] ? __kernel_text_address+0xd/0x40 [ 96.446734][T10982] ? unwind_get_return_address+0x61/0xa0 [ 96.452353][T10982] ? profile_setup.cold+0xbb/0xbb [ 96.457362][T10982] ? arch_stack_walk+0x97/0xf0 [ 96.462117][T10982] ? stack_trace_save+0x8f/0xc0 [ 96.467064][T10982] ? stack_trace_consume_entry+0x170/0x170 [ 96.472859][T10982] ? save_stack+0x5c/0x90 [ 96.477182][T10982] ? save_stack+0x23/0x90 [ 96.481556][T10982] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 96.487420][T10982] ? rtnl_newlink+0x4b/0xa0 [ 96.492025][T10982] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 96.497556][T10982] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 96.503535][T10982] ? __kasan_kmalloc.constprop.0+0xb0/0xe0 [ 96.509370][T10982] ? kmem_cache_alloc_trace+0x397/0x790 [ 96.514917][T10982] rtnl_newlink+0x69/0xa0 [ 96.519240][T10982] ? __rtnl_newlink+0x1790/0x1790 [ 96.524265][T10982] rtnetlink_rcv_msg+0x45e/0xaf0 [ 96.529191][T10982] ? rtnl_bridge_getlink+0x910/0x910 [ 96.534462][T10982] ? lock_downgrade+0x920/0x920 [ 96.539298][T10982] ? netlink_deliver_tap+0x226/0xbf0 [ 96.544580][T10982] ? find_held_lock+0x35/0x130 [ 96.549339][T10982] netlink_rcv_skb+0x177/0x450 [ 96.554101][T10982] ? rtnl_bridge_getlink+0x910/0x910 [ 96.559376][T10982] ? netlink_ack+0xb50/0xb50 [ 96.564006][T10982] ? __kasan_check_read+0x11/0x20 [ 96.569070][T10982] ? netlink_deliver_tap+0x248/0xbf0 [ 96.574355][T10982] rtnetlink_rcv+0x1d/0x30 [ 96.578767][T10982] netlink_unicast+0x59e/0x7e0 [ 96.583577][T10982] ? netlink_attachskb+0x870/0x870 [ 96.588685][T10982] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.595096][T10982] netlink_sendmsg+0x91c/0xea0 [ 96.599851][T10982] ? netlink_unicast+0x7e0/0x7e0 [ 96.604790][T10982] ? tomoyo_socket_sendmsg+0x26/0x30 [ 96.610060][T10982] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.616320][T10982] ? security_socket_sendmsg+0x8d/0xc0 [ 96.621760][T10982] ? netlink_unicast+0x7e0/0x7e0 [ 96.626797][T10982] sock_sendmsg+0xd7/0x130 [ 96.631200][T10982] ____sys_sendmsg+0x753/0x880 [ 96.635960][T10982] ? kernel_sendmsg+0x50/0x50 [ 96.640636][T10982] ___sys_sendmsg+0x100/0x170 [ 96.645332][T10982] ? sendmsg_copy_msghdr+0x70/0x70 [ 96.650440][T10982] ? do_huge_pmd_anonymous_page+0xceb/0x1a50 [ 96.656423][T10982] ? prep_transhuge_page+0xa0/0xa0 [ 96.661569][T10982] ? do_page_fault+0x579/0x12e1 [ 96.666417][T10982] ? find_held_lock+0x35/0x130 [ 96.671165][T10982] ? do_page_fault+0x579/0x12e1 [ 96.676143][T10982] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.682380][T10982] ? __fget_light+0x1ad/0x270 [ 96.687046][T10982] ? __fdget+0x1b/0x20 [ 96.691106][T10982] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 96.697332][T10982] __sys_sendmsg+0x105/0x1d0 [ 96.701903][T10982] ? __sys_sendmsg_sock+0xc0/0xc0 [ 96.706922][T10982] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 96.712632][T10982] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 96.718089][T10982] ? do_syscall_64+0x26/0x790 [ 96.722753][T10982] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 96.728799][T10982] ? do_syscall_64+0x26/0x790 [ 96.733479][T10982] __x64_sys_sendmsg+0x78/0xb0 [ 96.738235][T10982] do_syscall_64+0xfa/0x790 [ 96.742727][T10982] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 96.748597][T10982] RIP: 0033:0x4402e9 [ 96.752479][T10982] 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 [ 96.772062][T10982] RSP: 002b:00007ffde8aed008 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 96.780464][T10982] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402e9 [ 96.788415][T10982] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 [ 96.796365][T10982] RBP: 00000000006ca018 R08: 0000000000000008 R09: 00000000004002c8 [ 96.804320][T10982] R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000401b70 [ 96.812280][T10982] R13: 0000000000401c00 R14: 0000000000000000 R15: 0000000000000000 [ 96.820250][T10982] Modules linked in: [ 96.843934][T10982] ---[ end trace b553d38f3952cf88 ]--- [ 96.849425][T10982] RIP: 0010:inet6_set_link_af+0x66e/0xae0 [ 96.855123][T10982] 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 [ 96.874757][T10982] RSP: 0018:ffffc900058d6d40 EFLAGS: 00010206 [ 96.880861][T10982] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86e119a6 [ 96.888854][T10982] RDX: 0000000000000056 RSI: ffffffff86e11e74 RDI: 00000000000002b0 [ 96.896821][T10982] RBP: ffffc900058d6e70 R08: ffff888097f3c480 R09: ffffc900058d6db0 [ 96.904828][T10982] R10: fffff52000b1adbe R11: ffffc900058d6df7 R12: 0000000000000000 [ 96.912828][T10982] R13: 0000000000000000 R14: ffff8880a7d71c24 R15: dffffc0000000000 [ 96.920819][T10982] FS: 000000000075a880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 96.929784][T10982] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 96.936347][T10982] CR2: 000055666ccba008 CR3: 00000000a6f57000 CR4: 00000000001406f0 [ 96.944331][T10982] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 96.952325][T10982] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 96.960314][T10982] Kernel panic - not syncing: Fatal exception [ 96.968024][T10982] Kernel Offset: disabled [ 96.972354][T10982] Rebooting in 86400 seconds..