[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 77.607431][ T27] audit: type=1800 audit(1578709364.628:25): pid=9345 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 77.633086][ T27] audit: type=1800 audit(1578709364.628:26): pid=9345 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 77.684970][ T27] audit: type=1800 audit(1578709364.638:27): pid=9345 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 '10.128.10.31' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 88.345530][ T9497] kasan: CONFIG_KASAN_INLINE enabled [ 88.350953][ T9497] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 88.359114][ T9497] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 88.366070][ T9497] CPU: 0 PID: 9497 Comm: syz-executor319 Not tainted 5.5.0-rc5-syzkaller #0 [ 88.374717][ T9497] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 88.384816][ T9497] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 88.390178][ T9497] Code: 85 87 01 fb 45 84 f6 0f 84 68 02 00 00 e8 37 86 01 fb 49 8d bd 68 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 68 13 00 00 e8 29 bf ed fa [ 88.409778][ T9497] RSP: 0018:ffffc90001d87940 EFLAGS: 00010202 [ 88.415823][ T9497] RAX: dffffc0000000000 RBX: ffff8880a67b9a00 RCX: ffffffff8673a332 [ 88.423776][ T9497] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 88.431767][ T9497] RBP: ffffc90001d87970 R08: ffff8880a76e8200 R09: ffffed1015d0703d [ 88.439727][ T9497] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 88.447683][ T9497] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 88.455638][ T9497] FS: 0000000000f34880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 88.464566][ T9497] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 88.471235][ T9497] CR2: 00000000200008e0 CR3: 00000000a7cef000 CR4: 00000000001406f0 [ 88.479188][ T9497] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 88.487152][ T9497] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 88.495098][ T9497] Call Trace: [ 88.498370][ T9497] ? xt_rateest_put+0x440/0x440 [ 88.503195][ T9497] xt_rateest_tg_destroy+0x72/0xa0 [ 88.508285][ T9497] ? xt_percpu_counter_free+0x8f/0xd0 [ 88.513653][ T9497] translate_table+0x11f4/0x1d80 [ 88.518571][ T9497] ? arpt_alloc_initial_table+0x690/0x690 [ 88.524271][ T9497] ? lock_downgrade+0x920/0x920 [ 88.529103][ T9497] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 88.535339][ T9497] ? _copy_from_user+0x12c/0x1a0 [ 88.540254][ T9497] do_arpt_set_ctl+0x317/0x650 [ 88.545013][ T9497] ? __do_replace+0xa80/0xa80 [ 88.549668][ T9497] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 88.555202][ T9497] ? ___might_sleep+0x163/0x2c0 [ 88.560148][ T9497] ? wait_for_completion+0x440/0x440 [ 88.565422][ T9497] ? mutex_unlock+0xd/0x10 [ 88.569818][ T9497] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 88.575811][ T9497] nf_setsockopt+0x77/0xd0 [ 88.580224][ T9497] ip_setsockopt+0xdf/0x100 [ 88.584725][ T9497] udp_setsockopt+0x68/0xb0 [ 88.589227][ T9497] sock_common_setsockopt+0x94/0xd0 [ 88.594408][ T9497] __sys_setsockopt+0x261/0x4c0 [ 88.599254][ T9497] ? sock_create_kern+0x50/0x50 [ 88.604084][ T9497] ? down_read_non_owner+0x490/0x490 [ 88.609347][ T9497] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 88.615577][ T9497] ? handle_mm_fault+0x4ab/0xa50 [ 88.620596][ T9497] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 88.626040][ T9497] ? do_syscall_64+0x26/0x790 [ 88.630697][ T9497] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 88.636785][ T9497] ? do_syscall_64+0x26/0x790 [ 88.641457][ T9497] __x64_sys_setsockopt+0xbe/0x150 [ 88.646559][ T9497] do_syscall_64+0xfa/0x790 [ 88.651051][ T9497] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 88.656932][ T9497] RIP: 0033:0x441699 [ 88.660817][ T9497] 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 [ 88.680457][ T9497] RSP: 002b:00007ffdde5575c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 88.688869][ T9497] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441699 [ 88.696820][ T9497] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 88.704771][ T9497] RBP: 00000000006cb018 R08: 0000000000000430 R09: 00000000004002c8 [ 88.712721][ T9497] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000402f20 [ 88.720671][ T9497] R13: 0000000000402fb0 R14: 0000000000000000 R15: 0000000000000000 [ 88.728624][ T9497] Modules linked in: [ 88.733159][ T9497] ---[ end trace 63ce0b138cf59f59 ]--- [ 88.738645][ T9497] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 88.744059][ T9497] Code: 85 87 01 fb 45 84 f6 0f 84 68 02 00 00 e8 37 86 01 fb 49 8d bd 68 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 68 13 00 00 e8 29 bf ed fa [ 88.763676][ T9497] RSP: 0018:ffffc90001d87940 EFLAGS: 00010202 [ 88.769734][ T9497] RAX: dffffc0000000000 RBX: ffff8880a67b9a00 RCX: ffffffff8673a332 [ 88.777715][ T9497] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 88.785692][ T9497] RBP: ffffc90001d87970 R08: ffff8880a76e8200 R09: ffffed1015d0703d [ 88.793691][ T9497] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 88.801664][ T9497] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 88.809647][ T9497] FS: 0000000000f34880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 88.818596][ T9497] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 88.825189][ T9497] CR2: 00000000200008e0 CR3: 00000000a7cef000 CR4: 00000000001406f0 [ 88.833176][ T9497] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 88.841138][ T9497] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 88.849113][ T9497] Kernel panic - not syncing: Fatal exception [ 88.856582][ T9497] Kernel Offset: disabled [ 88.860904][ T9497] Rebooting in 86400 seconds..