[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 66.600436][ T27] audit: type=1800 audit(1578706640.766:25): pid=9474 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 66.620301][ T27] audit: type=1800 audit(1578706640.776:26): pid=9474 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 66.674948][ T27] audit: type=1800 audit(1578706640.776:27): pid=9474 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 '10.128.0.146' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 95.833998][ T9629] kasan: CONFIG_KASAN_INLINE enabled [ 95.839457][ T9629] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 95.847704][ T9629] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 95.854697][ T9629] CPU: 0 PID: 9629 Comm: syz-executor256 Not tainted 5.5.0-rc5-syzkaller #0 [ 95.863871][ T9629] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 95.873924][ T9629] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 95.879279][ T9629] Code: 65 b8 fd fa 45 84 f6 0f 84 68 02 00 00 e8 17 b7 fd fa 49 8d bd a8 13 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 6c 03 00 00 4d 8b b5 a8 13 00 00 e8 09 f0 e9 fa [ 95.898862][ T9629] RSP: 0018:ffffc90001ec7940 EFLAGS: 00010202 [ 95.904908][ T9629] RAX: dffffc0000000000 RBX: ffff8880a788c000 RCX: ffffffff86777d02 [ 95.912860][ T9629] RDX: 0000000000000275 RSI: ffffffff86777a89 RDI: 00000000000013a8 [ 95.920983][ T9629] RBP: ffffc90001ec7970 R08: ffff888097732300 R09: ffffed1015d0703d [ 95.928931][ T9629] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 95.936893][ T9629] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff86777e40 [ 95.944855][ T9629] FS: 0000000000afb880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 95.953799][ T9629] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 95.960364][ T9629] CR2: 00000000200008e0 CR3: 0000000095ed0000 CR4: 00000000001406f0 [ 95.968335][ T9629] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 95.976300][ T9629] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 95.984252][ T9629] Call Trace: [ 95.987528][ T9629] ? xt_rateest_put+0x440/0x440 [ 95.992372][ T9629] xt_rateest_tg_destroy+0x72/0xa0 [ 95.997463][ T9629] ? xt_percpu_counter_free+0x8f/0xd0 [ 96.002813][ T9629] translate_table+0x11f4/0x1d80 [ 96.007732][ T9629] ? arpt_alloc_initial_table+0x690/0x690 [ 96.013427][ T9629] ? lock_downgrade+0x920/0x920 [ 96.018260][ T9629] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 96.024493][ T9629] ? _copy_from_user+0x12c/0x1a0 [ 96.029407][ T9629] do_arpt_set_ctl+0x317/0x650 [ 96.034150][ T9629] ? __do_replace+0xa80/0xa80 [ 96.038813][ T9629] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 96.044349][ T9629] ? ___might_sleep+0x163/0x2c0 [ 96.049203][ T9629] ? wait_for_completion+0x440/0x440 [ 96.055301][ T9629] ? mutex_unlock+0xd/0x10 [ 96.059712][ T9629] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 96.065675][ T9629] nf_setsockopt+0x77/0xd0 [ 96.070079][ T9629] ip_setsockopt+0xdf/0x100 [ 96.074560][ T9629] udp_setsockopt+0x68/0xb0 [ 96.079172][ T9629] sock_common_setsockopt+0x94/0xd0 [ 96.084358][ T9629] __sys_setsockopt+0x261/0x4c0 [ 96.089193][ T9629] ? sock_create_kern+0x50/0x50 [ 96.094026][ T9629] ? down_read_non_owner+0x490/0x490 [ 96.099329][ T9629] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 96.105549][ T9629] ? handle_mm_fault+0x4ab/0xa50 [ 96.110480][ T9629] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 96.115937][ T9629] ? do_syscall_64+0x26/0x790 [ 96.120608][ T9629] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 96.126660][ T9629] ? do_syscall_64+0x26/0x790 [ 96.131371][ T9629] __x64_sys_setsockopt+0xbe/0x150 [ 96.136465][ T9629] do_syscall_64+0xfa/0x790 [ 96.140956][ T9629] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 96.146848][ T9629] RIP: 0033:0x441699 [ 96.150733][ T9629] 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 [ 96.170326][ T9629] RSP: 002b:00007ffca6d37478 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 96.178725][ T9629] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441699 [ 96.186674][ T9629] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 96.194620][ T9629] RBP: 00000000006cb018 R08: 0000000000000430 R09: 00000000004002c8 [ 96.202580][ T9629] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000402f20 [ 96.210539][ T9629] R13: 0000000000402fb0 R14: 0000000000000000 R15: 0000000000000000 [ 96.218487][ T9629] Modules linked in: [ 96.223144][ T9629] ---[ end trace 91075c918c0da7f5 ]--- [ 96.228613][ T9629] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 96.234024][ T9629] Code: 65 b8 fd fa 45 84 f6 0f 84 68 02 00 00 e8 17 b7 fd fa 49 8d bd a8 13 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 6c 03 00 00 4d 8b b5 a8 13 00 00 e8 09 f0 e9 fa [ 96.253750][ T9629] RSP: 0018:ffffc90001ec7940 EFLAGS: 00010202 [ 96.259815][ T9629] RAX: dffffc0000000000 RBX: ffff8880a788c000 RCX: ffffffff86777d02 [ 96.267825][ T9629] RDX: 0000000000000275 RSI: ffffffff86777a89 RDI: 00000000000013a8 [ 96.275886][ T9629] RBP: ffffc90001ec7970 R08: ffff888097732300 R09: ffffed1015d0703d [ 96.283893][ T9629] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 96.291881][ T9629] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff86777e40 [ 96.299848][ T9629] FS: 0000000000afb880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 96.308869][ T9629] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 96.315476][ T9629] CR2: 00000000200008e0 CR3: 0000000095ed0000 CR4: 00000000001406f0 [ 96.323527][ T9629] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 96.331526][ T9629] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 96.339496][ T9629] Kernel panic - not syncing: Fatal exception [ 96.347252][ T9629] Kernel Offset: disabled [ 96.351581][ T9629] Rebooting in 86400 seconds..