[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 74.506688][ T26] audit: type=1800 audit(1583391319.106:25): pid=9679 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 74.535831][ T26] audit: type=1800 audit(1583391319.106:26): pid=9679 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 74.583399][ T26] audit: type=1800 audit(1583391319.116:27): pid=9679 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 executing program executing program executing program executing program syzkaller login: [ 85.452927][ T9839] xt_hashlimit: size too large, truncated to 1048576 [ 85.455902][ T9845] xt_hashlimit: size too large, truncated to 1048576 [ 85.465885][ T9847] xt_hashlimit: size too large, truncated to 1048576 [ 85.473892][ T9839] xt_hashlimit: max too large, truncated to 1048576 [ 85.478087][ T9846] xt_hashlimit: size too large, truncated to 1048576 [ 85.481490][ T9847] xt_hashlimit: max too large, truncated to 1048576 [ 85.489127][ T9848] xt_hashlimit: size too large, truncated to 1048576 [ 85.503229][ T9849] xt_hashlimit: size too large, truncated to 1048576 [ 85.510254][ T9845] xt_hashlimit: max too large, truncated to 1048576 [ 85.517386][ T9849] xt_hashlimit: max too large, truncated to 1048576 [ 85.524370][ T9847] xt_SECMARK: only valid in 'mangle' or 'security' table, not 'raw' [ 85.524440][ T9846] xt_hashlimit: max too large, truncated to 1048576 [ 85.533255][ T9839] xt_SECMARK: only valid in 'mangle' or 'security' table, not 'raw' [ 85.540358][ T9848] xt_hashlimit: max too large, truncated to 1048576 [ 85.540396][ T9848] xt_SECMARK: only valid in 'mangle' or 'security' table, not 'raw' [ 85.540487][ T9845] xt_SECMARK: only valid in 'mangle' or 'security' table, not 'raw' [ 85.540543][ T9849] xt_SECMARK: only valid in 'mangle' or 'security' table, not 'raw' [ 85.540596][ T9846] xt_SECMARK: only valid in 'mangle' or 'security' table, not 'raw' [ 85.543483][ T9849] xt_hashlimit: size too large, truncated to 1048576 [ 85.560551][ T9847] xt_hashlimit: size too large, truncated to 1048576 [ 85.564793][ T9848] xt_hashlimit: size too large, truncated to 1048576 [ 85.583710][ T9847] xt_hashlimit: max too large, truncated to 1048576 [ 85.589176][ T9845] xt_hashlimit: size too large, truncated to 1048576 [ 85.623054][ T9846] xt_hashlimit: max too large, truncated to 1048576 [ 85.630311][ T9849] xt_hashlimit: max too large, truncated to 1048576 [ 85.651319][ T9848] xt_hashlimit: max too large, truncated to 1048576 [ 85.663691][ T9847] ------------[ cut here ]------------ [ 85.669438][ T9847] proc_dir_entry 'ip6t_hashlimit/hsr0' already registered [ 85.677284][ T9847] WARNING: CPU: 0 PID: 9847 at fs/proc/generic.c:362 proc_register+0x41e/0x590 [ 85.686261][ T9847] Kernel panic - not syncing: panic_on_warn set ... [ 85.693082][ T9847] CPU: 0 PID: 9847 Comm: syz-executor190 Not tainted 5.6.0-rc3-next-20200225-syzkaller #0 [ 85.703132][ T9847] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.713728][ T9847] Call Trace: [ 85.717047][ T9847] dump_stack+0x197/0x210 [ 85.721396][ T9847] ? proc_register+0x3a0/0x590 [ 85.726172][ T9847] panic+0x2e3/0x75c [ 85.730260][ T9847] ? add_taint.cold+0x16/0x16 [ 85.735061][ T9847] ? __kasan_check_write+0x14/0x20 [ 85.740285][ T9847] ? __warn.cold+0x14/0x3e [ 85.744937][ T9847] ? __warn+0xd9/0x1cf [ 85.749379][ T9847] ? proc_register+0x41e/0x590 [ 85.754255][ T9847] __warn.cold+0x2f/0x3e [ 85.758511][ T9847] ? proc_register+0x41e/0x590 [ 85.763729][ T9847] report_bug+0x289/0x300 [ 85.768224][ T9847] do_error_trap+0x11b/0x200 [ 85.773160][ T9847] do_invalid_op+0x37/0x50 [ 85.777618][ T9847] ? proc_register+0x41e/0x590 [ 85.782779][ T9847] invalid_op+0x23/0x30 [ 85.787055][ T9847] RIP: 0010:proc_register+0x41e/0x590 [ 85.792874][ T9847] Code: ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 5a 01 00 00 48 8b 45 d0 48 c7 c7 20 42 59 88 48 8b b0 d0 00 00 00 e8 51 d4 5d ff <0f> 0b 48 c7 c7 60 5d cb 89 e8 f4 b6 0e 06 48 8b 4d a0 48 b8 00 00 [ 85.813039][ T9847] RSP: 0018:ffffc900021df548 EFLAGS: 00010286 [ 85.819374][ T9847] RAX: 0000000000000000 RBX: ffff8882150a49f0 RCX: 0000000000000000 [ 85.827599][ T9847] RDX: 0000000000000000 RSI: ffffffff815ef766 RDI: fffff5200043be9b [ 85.836036][ T9847] RBP: ffffc900021df5b0 R08: ffff88809f144100 R09: fffffbfff16a4cfa [ 85.844105][ T9847] R10: fffffbfff16a4cf9 R11: ffffffff8b5267cf R12: ffff8880a36630c0 [ 85.852083][ T9847] R13: 0000000000000000 R14: ffff8880a4fc4538 R15: dffffc0000000000 [ 85.860285][ T9847] ? vprintk_func+0x86/0x189 [ 85.864910][ T9847] ? proc_register+0x41e/0x590 [ 85.869731][ T9847] proc_create_seq_private+0x12b/0x190 [ 85.875206][ T9847] ? proc_create+0x40/0x40 [ 85.879739][ T9847] ? lockdep_init_map+0x1be/0x6d0 [ 85.884920][ T9847] hashlimit_mt_check_common.isra.0+0xb30/0x1680 [ 85.891942][ T9847] hashlimit_mt_check_v2+0x327/0x3b0 [ 85.898022][ T9847] ? __mutex_lock+0x458/0x13c0 [ 85.903256][ T9847] ? hashlimit_mt_check+0xd0/0xd0 [ 85.908737][ T9847] ? lock_downgrade+0x920/0x920 [ 85.914229][ T9847] ? mutex_trylock+0x2d0/0x2d0 [ 85.919289][ T9847] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 85.926759][ T9847] ? hashlimit_mt_check+0xd0/0xd0 [ 85.932045][ T9847] xt_check_match+0x280/0x690 [ 85.937073][ T9847] ? xt_check_target+0x690/0x690 [ 85.942276][ T9847] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 85.948857][ T9847] ? mutex_unlock+0xd/0x10 [ 85.953404][ T9847] ? xt_find_match+0x73/0x280 [ 85.958162][ T9847] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 85.964575][ T9847] find_check_entry.isra.0+0x389/0x9d0 [ 85.970154][ T9847] ? __do_replace+0x950/0x950 [ 85.974949][ T9847] ? lockdep_hardirqs_on+0x421/0x5e0 [ 85.980234][ T9847] ? trace_hardirqs_on+0x67/0x240 [ 85.985268][ T9847] ? kvfree+0x4a/0x60 [ 85.989372][ T9847] translate_table+0xd15/0x1860 [ 85.994531][ T9847] ? compat_do_ip6t_get_ctl+0x9a0/0x9a0 [ 86.000174][ T9847] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 86.006488][ T9847] ? _copy_from_user+0x12c/0x1a0 [ 86.011457][ T9847] do_ip6t_set_ctl+0x2fe/0x4c8 [ 86.016236][ T9847] ? compat_do_ip6t_set_ctl+0x170/0x170 [ 86.022116][ T9847] ? mutex_unlock+0xd/0x10 [ 86.026639][ T9847] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 86.032627][ T9847] nf_setsockopt+0x77/0xd0 [ 86.037209][ T9847] ipv6_setsockopt+0x147/0x180 [ 86.042067][ T9847] tcp_setsockopt+0x8f/0xe0 [ 86.046570][ T9847] sock_common_setsockopt+0x94/0xd0 [ 86.052139][ T9847] __sys_setsockopt+0x261/0x4c0 [ 86.057092][ T9847] ? sock_create_kern+0x50/0x50 [ 86.061975][ T9847] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 86.068309][ T9847] ? __x64_sys_futex+0x404/0x590 [ 86.073258][ T9847] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 86.078719][ T9847] ? do_syscall_64+0x26/0x790 [ 86.083398][ T9847] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 86.089875][ T9847] ? do_syscall_64+0x26/0x790 [ 86.094570][ T9847] __x64_sys_setsockopt+0xbe/0x150 [ 86.099864][ T9847] do_syscall_64+0xfa/0x790 [ 86.104727][ T9847] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 86.110758][ T9847] RIP: 0033:0x446769 [ 86.114817][ T9847] Code: e8 0c e8 ff ff 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 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 86.134840][ T9847] RSP: 002b:00007fa327b62da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 86.143612][ T9847] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446769 [ 86.152013][ T9847] RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000004 [ 86.160079][ T9847] RBP: 00000000006dbc20 R08: 0000000000000001 R09: 0000000000000000 [ 86.168060][ T9847] R10: 0000000020000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 86.176186][ T9847] R13: 0000000020000000 R14: 00000000004ae628 R15: 0000000000000000 [ 86.186606][ T9847] Kernel Offset: disabled [ 86.191231][ T9847] Rebooting in 86400 seconds..