[ 36.092171] audit: type=1800 audit(1550028782.788:27): pid=7517 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 36.120654] audit: type=1800 audit(1550028782.788:28): pid=7517 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 36.887461] audit: type=1800 audit(1550028783.638:29): pid=7517 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 [ 36.906872] audit: type=1800 audit(1550028783.638:30): pid=7517 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 '10.128.0.156' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 47.134640] kasan: CONFIG_KASAN_INLINE enabled [ 47.139265] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 47.146612] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 47.152831] CPU: 0 PID: 7669 Comm: syz-executor789 Not tainted 5.0.0-rc5+ #60 [ 47.160084] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.169439] RIP: 0010:__lock_acquire+0x8df/0x4700 [ 47.174261] Code: 28 00 00 00 0f 85 35 27 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 dc 27 00 00 49 81 3c 24 20 45 9a 89 0f 84 03 f8 [ 47.193142] RSP: 0018:ffff88808b44f180 EFLAGS: 00010006 [ 47.198497] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 47.205828] RDX: 000000000000000c RSI: 0000000000000000 RDI: 0000000000000060 [ 47.213105] RBP: ffff88808b44f350 R08: 0000000000000001 R09: 0000000000000001 [ 47.220376] R10: ffff88808b44f570 R11: 0000000000000001 R12: 0000000000000060 [ 47.227625] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880915d4680 [ 47.234874] FS: 0000000001ef6880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 47.243077] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.248969] CR2: 0000000020000080 CR3: 0000000093549000 CR4: 00000000001406f0 [ 47.256475] Call Trace: [ 47.259056] ? mark_held_locks+0x100/0x100 [ 47.263277] ? is_bpf_text_address+0xac/0x170 [ 47.267753] ? mark_held_locks+0x100/0x100 [ 47.271975] ? depot_save_stack+0x1de/0x460 [ 47.276448] ? __lock_acquire+0x53b/0x4700 [ 47.280664] ? __lock_is_held+0xb6/0x140 [ 47.284703] ? check_noncircular+0x20/0x20 [ 47.288920] ? tc_ctl_chain+0x42f/0x11a0 [ 47.292962] lock_acquire+0x16f/0x3f0 [ 47.296751] ? tc_ctl_chain+0x42f/0x11a0 [ 47.300797] ? tc_ctl_chain+0x42f/0x11a0 [ 47.304845] __mutex_lock+0xf7/0x1310 [ 47.308630] ? tc_ctl_chain+0x42f/0x11a0 [ 47.312676] ? tcf_block_refcnt_get+0x22d/0x3e0 [ 47.317328] ? tc_ctl_chain+0x42f/0x11a0 [ 47.321379] ? tcf_block_refcnt_get+0x22d/0x3e0 [ 47.326028] ? mutex_trylock+0x1e0/0x1e0 [ 47.330075] ? lock_downgrade+0x810/0x810 [ 47.334206] ? kasan_check_read+0x11/0x20 [ 47.338334] ? tcf_block_refcnt_get+0x254/0x3e0 [ 47.342988] mutex_lock_nested+0x16/0x20 [ 47.347028] ? mutex_lock_nested+0x16/0x20 [ 47.351370] tc_ctl_chain+0x42f/0x11a0 [ 47.355241] ? rtnetlink_rcv_msg+0x40a/0xb00 [ 47.359756] ? tcf_block_release+0xa0/0xa0 [ 47.363985] ? refcount_dec_and_test_checked+0x1b/0x20 [ 47.369251] ? mutex_trylock+0x1e0/0x1e0 [ 47.373317] ? find_held_lock+0x35/0x130 [ 47.377514] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.383051] ? tcf_block_release+0xa0/0xa0 [ 47.387341] rtnetlink_rcv_msg+0x465/0xb00 [ 47.391684] ? rtnetlink_put_metrics+0x560/0x560 [ 47.396433] ? netlink_deliver_tap+0x22d/0xbf0 [ 47.401023] ? find_held_lock+0x35/0x130 [ 47.405067] netlink_rcv_skb+0x17a/0x460 [ 47.409167] ? rtnetlink_put_metrics+0x560/0x560 [ 47.413905] ? netlink_ack+0xb50/0xb50 [ 47.417803] ? kasan_check_read+0x11/0x20 [ 47.421943] ? netlink_deliver_tap+0x254/0xbf0 [ 47.426507] rtnetlink_rcv+0x1d/0x30 [ 47.430208] netlink_unicast+0x536/0x720 [ 47.434244] ? netlink_attachskb+0x770/0x770 [ 47.438649] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 47.443669] ? __check_object_size+0x3d/0x42f [ 47.448151] netlink_sendmsg+0x8ae/0xd70 [ 47.452188] ? netlink_unicast+0x720/0x720 [ 47.456400] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 47.461377] ? apparmor_socket_sendmsg+0x2a/0x30 [ 47.466109] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.471623] ? security_socket_sendmsg+0x93/0xc0 [ 47.476385] ? netlink_unicast+0x720/0x720 [ 47.480716] sock_sendmsg+0xdd/0x130 [ 47.484411] ___sys_sendmsg+0x806/0x930 [ 47.488380] ? copy_msghdr_from_user+0x430/0x430 [ 47.493116] ? _raw_spin_unlock+0x2d/0x50 [ 47.497252] ? __thp_get_unmapped_area+0x190/0x190 [ 47.502195] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.507734] ? __handle_mm_fault+0x7cd/0x3f20 [ 47.512368] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.517887] ? __fget_light+0x1a9/0x230 [ 47.521900] ? __fdget+0x1b/0x20 [ 47.525301] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 47.530912] __sys_sendmsg+0x105/0x1d0 [ 47.534969] ? __ia32_sys_shutdown+0x80/0x80 [ 47.539372] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 47.544111] ? do_syscall_64+0x26/0x610 [ 47.548065] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.553424] ? do_syscall_64+0x26/0x610 [ 47.561460] __x64_sys_sendmsg+0x78/0xb0 [ 47.565502] do_syscall_64+0x103/0x610 [ 47.569469] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.574693] RIP: 0033:0x4400d9 [ 47.577869] 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 [ 47.596750] RSP: 002b:00007ffd09281608 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 47.604437] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400d9 [ 47.611686] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 [ 47.618944] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 47.626193] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401960 [ 47.633499] R13: 00000000004019f0 R14: 0000000000000000 R15: 0000000000000000 [ 47.640754] Modules linked in: [ 47.643935] ---[ end trace 25ab48d993ef9249 ]--- [ 47.648671] RIP: 0010:__lock_acquire+0x8df/0x4700 [ 47.653493] Code: 28 00 00 00 0f 85 35 27 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 dc 27 00 00 49 81 3c 24 20 45 9a 89 0f 84 03 f8 [ 47.672376] RSP: 0018:ffff88808b44f180 EFLAGS: 00010006 [ 47.677773] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 47.685028] RDX: 000000000000000c RSI: 0000000000000000 RDI: 0000000000000060 [ 47.692277] RBP: ffff88808b44f350 R08: 0000000000000001 R09: 0000000000000001 [ 47.699527] R10: ffff88808b44f570 R11: 0000000000000001 R12: 0000000000000060 [ 47.706779] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880915d4680 [ 47.714070] FS: 0000000001ef6880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 47.722281] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.728147] CR2: 0000000020000080 CR3: 0000000093549000 CR4: 00000000001406f0 [ 47.735400] Kernel panic - not syncing: Fatal exception [ 47.741622] Kernel Offset: disabled [ 47.745241] Rebooting in 86400 seconds..