[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 74.275824][ T26] audit: type=1800 audit(1578704311.482:25): pid=9354 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 74.295527][ T26] audit: type=1800 audit(1578704311.492:26): pid=9354 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 74.339182][ T26] audit: type=1800 audit(1578704311.492:27): pid=9354 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 '10.128.0.188' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 82.455732][ T9506] kasan: CONFIG_KASAN_INLINE enabled [ 82.461182][ T9506] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 82.469331][ T9506] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 82.476642][ T9506] CPU: 1 PID: 9506 Comm: syz-executor379 Not tainted 5.5.0-rc5-syzkaller #0 [ 82.485535][ T9506] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.495585][ T9506] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 82.500939][ T9506] 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 [ 82.520622][ T9506] RSP: 0018:ffffc90001a87940 EFLAGS: 00010202 [ 82.526665][ T9506] RAX: dffffc0000000000 RBX: ffff8880a5169700 RCX: ffffffff86777d02 [ 82.534611][ T9506] RDX: 0000000000000275 RSI: ffffffff86777a89 RDI: 00000000000013a8 [ 82.542567][ T9506] RBP: ffffc90001a87970 R08: ffff888090738300 R09: ffffed1015d2703d [ 82.550527][ T9506] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 82.558482][ T9506] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff86777e40 [ 82.566433][ T9506] FS: 0000000000a86880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 82.575333][ T9506] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.581893][ T9506] CR2: 00000000200008e0 CR3: 00000000a96dd000 CR4: 00000000001406e0 [ 82.589843][ T9506] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.597801][ T9506] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.605755][ T9506] Call Trace: [ 82.609032][ T9506] ? xt_rateest_put+0x440/0x440 [ 82.613932][ T9506] xt_rateest_tg_destroy+0x72/0xa0 [ 82.619035][ T9506] ? xt_percpu_counter_free+0x8f/0xd0 [ 82.624394][ T9506] translate_table+0x11f4/0x1d80 [ 82.629495][ T9506] ? arpt_alloc_initial_table+0x690/0x690 [ 82.635189][ T9506] ? lock_downgrade+0x920/0x920 [ 82.640029][ T9506] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 82.646252][ T9506] ? _copy_from_user+0x12c/0x1a0 [ 82.651167][ T9506] do_arpt_set_ctl+0x317/0x650 [ 82.655908][ T9506] ? __do_replace+0xa80/0xa80 [ 82.660616][ T9506] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 82.666147][ T9506] ? ___might_sleep+0x163/0x2c0 [ 82.671057][ T9506] ? wait_for_completion+0x440/0x440 [ 82.676327][ T9506] ? mutex_unlock+0xd/0x10 [ 82.680726][ T9506] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 82.686697][ T9506] nf_setsockopt+0x77/0xd0 [ 82.691110][ T9506] ip_setsockopt+0xdf/0x100 [ 82.695603][ T9506] udp_setsockopt+0x68/0xb0 [ 82.700094][ T9506] sock_common_setsockopt+0x94/0xd0 [ 82.705270][ T9506] __sys_setsockopt+0x261/0x4c0 [ 82.710108][ T9506] ? sock_create_kern+0x50/0x50 [ 82.714947][ T9506] ? down_read_non_owner+0x490/0x490 [ 82.720326][ T9506] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 82.726563][ T9506] ? handle_mm_fault+0x4ab/0xa50 [ 82.731497][ T9506] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 82.736936][ T9506] ? do_syscall_64+0x26/0x790 [ 82.741615][ T9506] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 82.747675][ T9506] ? do_syscall_64+0x26/0x790 [ 82.752345][ T9506] __x64_sys_setsockopt+0xbe/0x150 [ 82.757448][ T9506] do_syscall_64+0xfa/0x790 [ 82.762058][ T9506] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 82.768538][ T9506] RIP: 0033:0x441699 [ 82.772521][ T9506] 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 [ 82.792102][ T9506] RSP: 002b:00007ffcc6798788 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 82.800503][ T9506] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441699 [ 82.808608][ T9506] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 82.816567][ T9506] RBP: 00000000006cb018 R08: 0000000000000430 R09: 00000000004002c8 [ 82.824539][ T9506] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000402f20 [ 82.832489][ T9506] R13: 0000000000402fb0 R14: 0000000000000000 R15: 0000000000000000 [ 82.840452][ T9506] Modules linked in: [ 82.844774][ T9506] ---[ end trace bc06ebcf555cec10 ]--- [ 82.850302][ T9506] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 82.855680][ T9506] 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 [ 82.876080][ T9506] RSP: 0018:ffffc90001a87940 EFLAGS: 00010202 [ 82.882165][ T9506] RAX: dffffc0000000000 RBX: ffff8880a5169700 RCX: ffffffff86777d02 [ 82.890160][ T9506] RDX: 0000000000000275 RSI: ffffffff86777a89 RDI: 00000000000013a8 [ 82.898132][ T9506] RBP: ffffc90001a87970 R08: ffff888090738300 R09: ffffed1015d2703d [ 82.906132][ T9506] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 82.914122][ T9506] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff86777e40 [ 82.922107][ T9506] FS: 0000000000a86880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 82.931055][ T9506] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.937622][ T9506] CR2: 00000000200008e0 CR3: 00000000a96dd000 CR4: 00000000001406e0 [ 82.945609][ T9506] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.953604][ T9506] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.961581][ T9506] Kernel panic - not syncing: Fatal exception [ 82.969210][ T9506] Kernel Offset: disabled [ 82.973541][ T9506] Rebooting in 86400 seconds..