[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 59.323956][ T26] audit: type=1800 audit(1562685743.194:25): pid=8656 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 59.369031][ T26] audit: type=1800 audit(1562685743.194:26): pid=8656 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 59.414723][ T26] audit: type=1800 audit(1562685743.204:27): pid=8656 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.9' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 70.844548][ T8813] ------------[ cut here ]------------ [ 70.850455][ T8813] jump label: negative count! [ 70.856118][ T8813] WARNING: CPU: 0 PID: 8813 at kernel/jump_label.c:221 static_key_slow_try_dec+0x1ab/0x1d0 [ 70.866185][ T8813] Kernel panic - not syncing: panic_on_warn set ... [ 70.872757][ T8813] CPU: 0 PID: 8813 Comm: syz-executor467 Not tainted 5.2.0-rc6+ #62 [ 70.880710][ T8813] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.891011][ T8813] Call Trace: [ 70.894297][ T8813] dump_stack+0x172/0x1f0 [ 70.898690][ T8813] ? static_key_slow_try_dec+0x190/0x1d0 [ 70.904379][ T8813] panic+0x2cb/0x744 [ 70.908268][ T8813] ? __warn_printk+0xf3/0xf3 [ 70.912846][ T8813] ? static_key_slow_try_dec+0x1ab/0x1d0 [ 70.918465][ T8813] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.924734][ T8813] ? __warn.cold+0x5/0x4d [ 70.929066][ T8813] ? __warn+0xe8/0x1d0 [ 70.933136][ T8813] ? static_key_slow_try_dec+0x1ab/0x1d0 [ 70.938828][ T8813] __warn.cold+0x20/0x4d [ 70.943061][ T8813] ? vprintk_emit+0x1ea/0x700 [ 70.947723][ T8813] ? static_key_slow_try_dec+0x1ab/0x1d0 [ 70.953344][ T8813] report_bug+0x263/0x2b0 [ 70.957667][ T8813] do_error_trap+0x11b/0x200 [ 70.962247][ T8813] do_invalid_op+0x37/0x50 [ 70.966647][ T8813] ? static_key_slow_try_dec+0x1ab/0x1d0 [ 70.972266][ T8813] invalid_op+0x14/0x20 [ 70.976406][ T8813] RIP: 0010:static_key_slow_try_dec+0x1ab/0x1d0 [ 70.982707][ T8813] Code: c0 e8 e9 3e e5 ff 83 fb 01 0f 85 32 ff ff ff e8 5b 3d e5 ff 45 31 ff eb a0 e8 51 3d e5 ff 48 c7 c7 40 99 92 87 e8 13 75 b7 ff <0f> 0b eb 8b 4c 89 e7 e8 a9 c0 1e 00 e9 de fe ff ff e8 bf 6d b7 ff [ 71.002394][ T8813] RSP: 0018:ffff888096647450 EFLAGS: 00010286 [ 71.008459][ T8813] RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000000000000 [ 71.016546][ T8813] RDX: 0000000000000000 RSI: ffffffff815adb06 RDI: ffffed1012cc8e7c [ 71.024656][ T8813] RBP: ffff8880966474e0 R08: ffff88809f6fa440 R09: ffffed1015d060a9 [ 71.032615][ T8813] R10: ffffed1015d060a8 R11: ffff8880ae830547 R12: ffffffff89832ce0 [ 71.040700][ T8813] R13: ffff8880966474b8 R14: 1ffff11012cc8e8b R15: 00000000ffffff01 [ 71.048683][ T8813] ? vprintk_func+0x86/0x189 [ 71.053359][ T8813] ? static_key_disable+0x30/0x30 [ 71.058417][ T8813] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 71.064763][ T8813] ? ip6_datagram_send_ctl+0x569/0x1b60 [ 71.070301][ T8813] __static_key_slow_dec_deferred+0x65/0x110 [ 71.076277][ T8813] fl_free+0xa9/0xe0 [ 71.080270][ T8813] fl_create+0x6af/0x9f0 [ 71.084716][ T8813] ? ip6fl_seq_next+0xb0/0xb0 [ 71.089380][ T8813] ? is_dynamic_key+0x1c0/0x1c0 [ 71.094327][ T8813] ? mark_held_locks+0xf0/0xf0 [ 71.099094][ T8813] ? find_held_lock+0x35/0x130 [ 71.103891][ T8813] ? __might_fault+0x12b/0x1e0 [ 71.108713][ T8813] ? lock_downgrade+0x880/0x880 [ 71.113568][ T8813] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 71.119821][ T8813] ipv6_flowlabel_opt+0x80e/0x2730 [ 71.124924][ T8813] ? ipv6_flowlabel_opt_get+0xa10/0xa10 [ 71.130642][ T8813] ? lockdep_hardirqs_on+0x418/0x5d0 [ 71.135918][ T8813] ? lock_sock_nested+0x9a/0x120 [ 71.140920][ T8813] ? lock_sock_nested+0x9a/0x120 [ 71.146097][ T8813] ? __local_bh_enable_ip+0x15a/0x270 [ 71.151667][ T8813] do_ipv6_setsockopt.isra.0+0x2119/0x4100 [ 71.157586][ T8813] ? do_ipv6_setsockopt.isra.0+0x2119/0x4100 [ 71.163667][ T8813] ? ipv6_update_options+0x3b0/0x3b0 [ 71.168937][ T8813] ? free_unref_page_list+0x86a/0xc30 [ 71.174298][ T8813] ? release_pages+0x5df/0x1930 [ 71.179136][ T8813] ? free_unref_page_list+0x86a/0xc30 [ 71.184494][ T8813] ? lockdep_hardirqs_on+0x418/0x5d0 [ 71.189767][ T8813] ? trace_hardirqs_on+0x67/0x220 [ 71.195020][ T8813] ? find_held_lock+0x35/0x130 [ 71.199774][ T8813] ? release_pages+0x5df/0x1930 [ 71.204697][ T8813] ? mark_held_locks+0xa4/0xf0 [ 71.209455][ T8813] ? put_pages_list+0x2e0/0x2e0 [ 71.214536][ T8813] ? trace_hardirqs_on+0x67/0x220 [ 71.219681][ T8813] ? kasan_check_read+0x11/0x20 [ 71.224622][ T8813] ? do_huge_pmd_anonymous_page+0xebd/0x1660 [ 71.230823][ T8813] ? find_held_lock+0x35/0x130 [ 71.235859][ T8813] ? do_huge_pmd_anonymous_page+0xebd/0x1660 [ 71.241849][ T8813] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 71.248169][ T8813] ? aa_label_sk_perm+0x101/0x560 [ 71.253385][ T8813] ? aa_profile_af_perm+0x320/0x320 [ 71.258576][ T8813] ? do_huge_pmd_anonymous_page+0x11a6/0x1660 [ 71.264746][ T8813] ? __handle_mm_fault+0x2d59/0x3eb0 [ 71.270027][ T8813] ? do_huge_pmd_anonymous_page+0x11a6/0x1660 [ 71.276096][ T8813] ? lockdep_hardirqs_on+0x418/0x5d0 [ 71.281501][ T8813] ? trace_hardirqs_on+0x67/0x220 [ 71.286648][ T8813] ? do_huge_pmd_anonymous_page+0x420/0x1660 [ 71.292879][ T8813] ? ___might_sleep+0x163/0x280 [ 71.297849][ T8813] ? __might_sleep+0x95/0x190 [ 71.302630][ T8813] ipv6_setsockopt+0xf6/0x170 [ 71.307315][ T8813] ? ipv6_setsockopt+0xf6/0x170 [ 71.312161][ T8813] tcp_setsockopt+0x8f/0xe0 [ 71.316669][ T8813] sock_common_setsockopt+0x94/0xd0 [ 71.321867][ T8813] __sys_setsockopt+0x253/0x4b0 [ 71.326865][ T8813] ? kernel_setsockopt+0x1d0/0x1d0 [ 71.331984][ T8813] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 71.337446][ T8813] ? do_syscall_64+0x26/0x680 [ 71.342122][ T8813] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 71.349076][ T8813] ? do_syscall_64+0x26/0x680 [ 71.353759][ T8813] __x64_sys_setsockopt+0xbe/0x150 [ 71.358873][ T8813] do_syscall_64+0xfd/0x680 [ 71.363416][ T8813] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 71.369357][ T8813] RIP: 0033:0x441209 [ 71.373414][ T8813] Code: e8 fc ab 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 71.393226][ T8813] RSP: 002b:00007ffdb8b65958 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 71.401635][ T8813] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441209 [ 71.409645][ T8813] RDX: 0000000000000020 RSI: 0000000000000029 RDI: 0000000000000003 [ 71.417659][ T8813] RBP: 00000000000114aa R08: 000000000000fdf7 R09: 00000000004002c8 [ 71.425756][ T8813] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000402030 [ 71.433733][ T8813] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 71.443202][ T8813] Kernel Offset: disabled [ 71.447588][ T8813] Rebooting in 86400 seconds..