[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 91.218368][ T27] audit: type=1800 audit(1579160234.881:25): pid=9307 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 91.248500][ T27] audit: type=1800 audit(1579160234.891:26): pid=9307 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 91.297245][ T27] audit: type=1800 audit(1579160234.891:27): pid=9307 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 '10.128.10.16' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 103.724162][ T9463] kasan: CONFIG_KASAN_INLINE enabled [ 103.729537][ T9463] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 103.737814][ T9463] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 103.744747][ T9463] CPU: 1 PID: 9463 Comm: syz-executor088 Not tainted 5.5.0-rc5-syzkaller #0 [ 103.753406][ T9463] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 103.763466][ T9463] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 103.769992][ T9463] Code: 25 56 04 fb 45 84 f6 0f 84 68 02 00 00 e8 d7 54 04 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 c9 8d f0 fa [ 103.790100][ T9463] RSP: 0018:ffffc900079e7940 EFLAGS: 00010202 [ 103.796165][ T9463] RAX: dffffc0000000000 RBX: ffff8880a8d74200 RCX: ffffffff8670a332 [ 103.806943][ T9463] RDX: 000000000000026d RSI: ffffffff8670a0b9 RDI: 0000000000001368 [ 103.814984][ T9463] RBP: ffffc900079e7970 R08: ffff8880957203c0 R09: ffffed1015d2703d [ 103.822951][ T9463] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 103.830928][ T9463] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8670a470 [ 103.838897][ T9463] FS: 0000000002160880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 103.847807][ T9463] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 103.854385][ T9463] CR2: 00000000200008c0 CR3: 00000000a8530000 CR4: 00000000001406e0 [ 103.862351][ T9463] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 103.870358][ T9463] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 103.879446][ T9463] Call Trace: [ 103.883507][ T9463] ? xt_rateest_put+0x440/0x440 [ 103.888355][ T9463] xt_rateest_tg_destroy+0x72/0xa0 [ 103.893459][ T9463] ? xt_percpu_counter_free+0x8f/0xd0 [ 103.898837][ T9463] translate_table+0x11f4/0x1d80 [ 103.903773][ T9463] ? arpt_alloc_initial_table+0x690/0x690 [ 103.909490][ T9463] ? lock_downgrade+0x920/0x920 [ 103.914340][ T9463] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 103.920557][ T9463] ? _copy_from_user+0x12c/0x1a0 [ 103.925492][ T9463] do_arpt_set_ctl+0x317/0x650 [ 103.930236][ T9463] ? __do_replace+0xa80/0xa80 [ 103.934910][ T9463] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 103.940451][ T9463] ? ___might_sleep+0x163/0x2c0 [ 103.945299][ T9463] ? wait_for_completion+0x440/0x440 [ 103.950594][ T9463] ? mutex_unlock+0xd/0x10 [ 103.955008][ T9463] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 103.960981][ T9463] nf_setsockopt+0x77/0xd0 [ 103.965395][ T9463] ip_setsockopt+0xdf/0x100 [ 103.969890][ T9463] udp_setsockopt+0x68/0xb0 [ 103.974465][ T9463] sock_common_setsockopt+0x94/0xd0 [ 103.979659][ T9463] __sys_setsockopt+0x261/0x4c0 [ 103.984515][ T9463] ? sock_create_kern+0x50/0x50 [ 103.989419][ T9463] ? down_read_non_owner+0x490/0x490 [ 103.994699][ T9463] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 104.000922][ T9463] ? handle_mm_fault+0x4ab/0xa50 [ 104.005858][ T9463] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 104.011310][ T9463] ? do_syscall_64+0x26/0x790 [ 104.016066][ T9463] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 104.022126][ T9463] ? do_syscall_64+0x26/0x790 [ 104.026806][ T9463] __x64_sys_setsockopt+0xbe/0x150 [ 104.031925][ T9463] do_syscall_64+0xfa/0x790 [ 104.036422][ T9463] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 104.042298][ T9463] RIP: 0033:0x442899 [ 104.046176][ T9463] 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 [ 104.065868][ T9463] RSP: 002b:00007fffa5c007f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 104.074265][ T9463] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442899 [ 104.083295][ T9463] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 104.091289][ T9463] RBP: 00000000006cd018 R08: 0000000000000430 R09: 00000000004002c8 [ 104.099251][ T9463] R10: 00000000200008c0 R11: 0000000000000246 R12: 00000000004036c0 [ 104.107212][ T9463] R13: 0000000000403750 R14: 0000000000000000 R15: 0000000000000000 [ 104.115175][ T9463] Modules linked in: [ 104.119661][ T9463] ---[ end trace 201f90b0765eb075 ]--- [ 104.125180][ T9463] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 104.130593][ T9463] Code: 25 56 04 fb 45 84 f6 0f 84 68 02 00 00 e8 d7 54 04 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 c9 8d f0 fa [ 104.150218][ T9463] RSP: 0018:ffffc900079e7940 EFLAGS: 00010202 [ 104.156322][ T9463] RAX: dffffc0000000000 RBX: ffff8880a8d74200 RCX: ffffffff8670a332 [ 104.164356][ T9463] RDX: 000000000000026d RSI: ffffffff8670a0b9 RDI: 0000000000001368 [ 104.172352][ T9463] RBP: ffffc900079e7970 R08: ffff8880957203c0 R09: ffffed1015d2703d [ 104.180480][ T9463] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 104.188504][ T9463] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8670a470 [ 104.196625][ T9463] FS: 0000000002160880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 104.205586][ T9463] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 104.212359][ T9463] CR2: 00000000200008c0 CR3: 00000000a8530000 CR4: 00000000001406e0 [ 104.220403][ T9463] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 104.228376][ T9463] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 104.236375][ T9463] Kernel panic - not syncing: Fatal exception [ 104.243706][ T9463] Kernel Offset: disabled [ 104.248078][ T9463] Rebooting in 86400 seconds..