[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 60.722160][ T27] audit: type=1800 audit(1562813959.653:25): pid=9043 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 60.754088][ T27] audit: type=1800 audit(1562813959.653:26): pid=9043 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 60.835764][ T27] audit: type=1800 audit(1562813959.663:27): pid=9043 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 '10.128.1.29' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 70.363169][ T9199] ------------[ cut here ]------------ [ 70.368822][ T9199] jump label: negative count! [ 70.374057][ T9199] WARNING: CPU: 0 PID: 9199 at kernel/jump_label.c:235 static_key_slow_try_dec+0x1ab/0x1d0 [ 70.384025][ T9199] Kernel panic - not syncing: panic_on_warn set ... [ 70.390593][ T9199] CPU: 0 PID: 9199 Comm: syz-executor856 Not tainted 5.2.0-next-20190710 #35 [ 70.399326][ T9199] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.409376][ T9199] Call Trace: [ 70.412650][ T9199] dump_stack+0x172/0x1f0 [ 70.416961][ T9199] ? static_key_slow_try_dec+0xd0/0x1d0 [ 70.422484][ T9199] panic+0x2dc/0x755 [ 70.426369][ T9199] ? add_taint.cold+0x16/0x16 [ 70.431034][ T9199] ? __kasan_check_read+0x11/0x20 [ 70.436052][ T9199] ? __warn.cold+0x5/0x4c [ 70.440374][ T9199] ? __warn+0xe7/0x1e0 [ 70.444424][ T9199] ? static_key_slow_try_dec+0x1ab/0x1d0 [ 70.450052][ T9199] __warn.cold+0x20/0x4c [ 70.454272][ T9199] ? vprintk_emit+0x1ea/0x700 [ 70.458929][ T9199] ? static_key_slow_try_dec+0x1ab/0x1d0 [ 70.464558][ T9199] report_bug+0x263/0x2b0 [ 70.468868][ T9199] do_error_trap+0x11b/0x200 [ 70.473437][ T9199] do_invalid_op+0x37/0x50 [ 70.477833][ T9199] ? static_key_slow_try_dec+0x1ab/0x1d0 [ 70.483443][ T9199] invalid_op+0x14/0x20 [ 70.487577][ T9199] RIP: 0010:static_key_slow_try_dec+0x1ab/0x1d0 [ 70.493813][ T9199] Code: c0 e8 d9 07 e5 ff 83 fb 01 0f 85 32 ff ff ff e8 4b 06 e5 ff 45 31 ff eb a0 e8 41 06 e5 ff 48 c7 c7 40 f3 92 87 e8 ad 6e b6 ff <0f> 0b eb 8b 4c 89 e7 e8 f9 46 1f 00 e9 de fe ff ff e8 4f 67 b6 ff [ 70.513412][ T9199] RSP: 0018:ffff88809ab37450 EFLAGS: 00010286 [ 70.519456][ T9199] RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000000000000 [ 70.527406][ T9199] RDX: 0000000000000000 RSI: ffffffff815bfa86 RDI: ffffed1013566e7c [ 70.535355][ T9199] RBP: ffff88809ab374e0 R08: ffff88808c0f6180 R09: ffffed1015d060b1 [ 70.543321][ T9199] R10: ffffed1015d060b0 R11: ffff8880ae830587 R12: ffffffff89865a80 [ 70.551287][ T9199] R13: ffff88809ab374b8 R14: 1ffff11013566e8b R15: 00000000ffffff01 [ 70.559253][ T9199] ? vprintk_func+0x86/0x189 [ 70.563827][ T9199] ? static_key_disable+0x30/0x30 [ 70.568833][ T9199] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 70.575055][ T9199] ? ip6_datagram_send_ctl+0x569/0x1b80 [ 70.580582][ T9199] __static_key_slow_dec_deferred+0x65/0x110 [ 70.586564][ T9199] fl_free+0xa9/0xe0 [ 70.590484][ T9199] fl_create+0x6af/0x9f0 [ 70.594742][ T9199] ? ip6fl_seq_next+0xb0/0xb0 [ 70.599400][ T9199] ? __might_fault+0x12b/0x1e0 [ 70.604145][ T9199] ? find_held_lock+0x35/0x130 [ 70.608885][ T9199] ? __might_fault+0x12b/0x1e0 [ 70.613631][ T9199] ? lock_downgrade+0x920/0x920 [ 70.618468][ T9199] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 70.624716][ T9199] ipv6_flowlabel_opt+0x80e/0x2730 [ 70.629809][ T9199] ? ipv6_flowlabel_opt_get+0xa10/0xa10 [ 70.635351][ T9199] ? lockdep_hardirqs_on+0x418/0x5d0 [ 70.640615][ T9199] ? lock_sock_nested+0x9a/0x120 [ 70.645530][ T9199] ? lock_sock_nested+0x9a/0x120 [ 70.650466][ T9199] ? __local_bh_enable_ip+0x15a/0x270 [ 70.655828][ T9199] do_ipv6_setsockopt.isra.0+0x2125/0x4120 [ 70.661642][ T9199] ? do_ipv6_setsockopt.isra.0+0x2125/0x4120 [ 70.667603][ T9199] ? mark_lock+0xc0/0x11e0 [ 70.672003][ T9199] ? ipv6_update_options+0x3b0/0x3b0 [ 70.677269][ T9199] ? free_unref_page_list+0x56e/0x780 [ 70.682634][ T9199] ? release_pages+0xd9a/0x1a50 [ 70.687479][ T9199] ? free_unref_page_list+0x56e/0x780 [ 70.692832][ T9199] ? lockdep_hardirqs_on+0x418/0x5d0 [ 70.698100][ T9199] ? trace_hardirqs_on+0x67/0x240 [ 70.703123][ T9199] ? page_evictable+0x1c0/0x3b0 [ 70.712370][ T9199] ? free_unref_page_list+0x577/0x780 [ 70.717746][ T9199] ? __kasan_check_read+0x11/0x20 [ 70.722752][ T9199] ? release_pages+0xd9a/0x1a50 [ 70.727583][ T9199] ? mark_held_locks+0xa4/0xf0 [ 70.732341][ T9199] ? lru_deactivate_file_fn+0x1b30/0x1b30 [ 70.738045][ T9199] ? trace_hardirqs_on+0x67/0x240 [ 70.743049][ T9199] ? __kasan_check_read+0x11/0x20 [ 70.748056][ T9199] ? do_huge_pmd_anonymous_page+0xb43/0x19d0 [ 70.754058][ T9199] ? find_held_lock+0x35/0x130 [ 70.758836][ T9199] ? __kasan_check_read+0x11/0x20 [ 70.763868][ T9199] ? mark_lock+0xc0/0x11e0 [ 70.768294][ T9199] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 70.774558][ T9199] ? aa_label_sk_perm+0x101/0x560 [ 70.779622][ T9199] ? aa_profile_af_perm+0x320/0x320 [ 70.784842][ T9199] ? do_huge_pmd_anonymous_page+0x144c/0x19d0 [ 70.790945][ T9199] ? __handle_mm_fault+0x2d3b/0x3f20 [ 70.796256][ T9199] ? do_huge_pmd_anonymous_page+0x144c/0x19d0 [ 70.802348][ T9199] ? lockdep_hardirqs_on+0x418/0x5d0 [ 70.807645][ T9199] ? trace_hardirqs_on+0x67/0x240 [ 70.812810][ T9199] ? do_huge_pmd_anonymous_page+0xc53/0x19d0 [ 70.818799][ T9199] ? ___might_sleep+0x163/0x280 [ 70.823654][ T9199] ? __might_sleep+0x95/0x190 [ 70.828346][ T9199] ipv6_setsockopt+0xf6/0x170 [ 70.833049][ T9199] ? ipv6_setsockopt+0xf6/0x170 [ 70.837908][ T9199] tcp_setsockopt+0x8f/0xe0 [ 70.842424][ T9199] sock_common_setsockopt+0x94/0xd0 [ 70.847620][ T9199] __sys_setsockopt+0x261/0x4c0 [ 70.852465][ T9199] ? sock_create_kern+0x50/0x50 [ 70.857298][ T9199] ? down_read_non_owner+0x450/0x450 [ 70.862583][ T9199] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 70.868823][ T9199] ? handle_mm_fault+0x1d3/0x6b0 [ 70.873755][ T9199] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 70.879194][ T9199] ? do_syscall_64+0x26/0x6a0 [ 70.883850][ T9199] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 70.889895][ T9199] ? do_syscall_64+0x26/0x6a0 [ 70.894554][ T9199] __x64_sys_setsockopt+0xbe/0x150 [ 70.899647][ T9199] do_syscall_64+0xfd/0x6a0 [ 70.904132][ T9199] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 70.910001][ T9199] RIP: 0033:0x441209 [ 70.913892][ T9199] 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 [ 70.933501][ T9199] RSP: 002b:00007ffee601be38 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 70.941900][ T9199] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441209 [ 70.949853][ T9199] RDX: 0000000000000020 RSI: 0000000000000029 RDI: 0000000000000003 [ 70.957804][ T9199] RBP: 00000000000112be R08: 000000000000fdf7 R09: 00000000004002c8 [ 70.965751][ T9199] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000402030 [ 70.973697][ T9199] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 70.982716][ T9199] Kernel Offset: disabled [ 70.987083][ T9199] Rebooting in 86400 seconds..