[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 77.652479][ T27] audit: type=1800 audit(1578703098.054:25): pid=9258 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 77.672383][ T27] audit: type=1800 audit(1578703098.054:26): pid=9258 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 77.735019][ T27] audit: type=1800 audit(1578703098.054:27): pid=9258 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 '10.128.0.49' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 86.498103][ T9411] kasan: CONFIG_KASAN_INLINE enabled [ 86.503509][ T9411] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 86.511725][ T9411] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 86.518652][ T9411] CPU: 0 PID: 9411 Comm: syz-executor395 Not tainted 5.5.0-rc5-syzkaller #0 [ 86.527352][ T9411] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 86.537443][ T9411] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 86.542796][ T9411] 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 [ 86.562394][ T9411] RSP: 0018:ffffc90001da7940 EFLAGS: 00010202 [ 86.568441][ T9411] RAX: dffffc0000000000 RBX: ffff8880a5288b00 RCX: ffffffff86777d02 [ 86.576408][ T9411] RDX: 0000000000000275 RSI: ffffffff86777a89 RDI: 00000000000013a8 [ 86.584360][ T9411] RBP: ffffc90001da7970 R08: ffff88808d2c8500 R09: ffffed1015d0703d [ 86.592321][ T9411] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 86.600268][ T9411] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff86777e40 [ 86.608232][ T9411] FS: 0000000001bfc880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 86.617143][ T9411] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 86.623701][ T9411] CR2: 00000000200008e0 CR3: 00000000a7953000 CR4: 00000000001406f0 [ 86.631648][ T9411] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 86.639606][ T9411] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 86.647550][ T9411] Call Trace: [ 86.650819][ T9411] ? xt_rateest_put+0x440/0x440 [ 86.655665][ T9411] xt_rateest_tg_destroy+0x72/0xa0 [ 86.660767][ T9411] ? xt_percpu_counter_free+0x8f/0xd0 [ 86.666143][ T9411] translate_table+0x11f4/0x1d80 [ 86.671076][ T9411] ? arpt_alloc_initial_table+0x690/0x690 [ 86.676779][ T9411] ? lock_downgrade+0x920/0x920 [ 86.681624][ T9411] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 86.687838][ T9411] ? _copy_from_user+0x12c/0x1a0 [ 86.692753][ T9411] do_arpt_set_ctl+0x317/0x650 [ 86.697493][ T9411] ? __do_replace+0xa80/0xa80 [ 86.704754][ T9411] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 86.710277][ T9411] ? ___might_sleep+0x163/0x2c0 [ 86.715103][ T9411] ? wait_for_completion+0x440/0x440 [ 86.720366][ T9411] ? mutex_unlock+0xd/0x10 [ 86.724760][ T9411] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 86.730715][ T9411] nf_setsockopt+0x77/0xd0 [ 86.735106][ T9411] ip_setsockopt+0xdf/0x100 [ 86.739590][ T9411] udp_setsockopt+0x68/0xb0 [ 86.744089][ T9411] sock_common_setsockopt+0x94/0xd0 [ 86.749281][ T9411] __sys_setsockopt+0x261/0x4c0 [ 86.756119][ T9411] ? sock_create_kern+0x50/0x50 [ 86.760954][ T9411] ? down_read_non_owner+0x490/0x490 [ 86.766229][ T9411] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 86.772449][ T9411] ? handle_mm_fault+0x4ab/0xa50 [ 86.777370][ T9411] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 86.782831][ T9411] ? do_syscall_64+0x26/0x790 [ 86.787497][ T9411] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 86.793548][ T9411] ? do_syscall_64+0x26/0x790 [ 86.798217][ T9411] __x64_sys_setsockopt+0xbe/0x150 [ 86.803313][ T9411] do_syscall_64+0xfa/0x790 [ 86.807798][ T9411] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 86.813677][ T9411] RIP: 0033:0x441699 [ 86.817561][ T9411] 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 [ 86.837150][ T9411] RSP: 002b:00007ffd5cfede98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 86.845572][ T9411] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441699 [ 86.853529][ T9411] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 86.861487][ T9411] RBP: 00000000006cb018 R08: 0000000000000430 R09: 00000000004002c8 [ 86.869455][ T9411] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000402f20 [ 86.877467][ T9411] R13: 0000000000402fb0 R14: 0000000000000000 R15: 0000000000000000 [ 86.885431][ T9411] Modules linked in: [ 86.890738][ T9411] ---[ end trace 1c788a8ec0d6b88f ]--- [ 86.896224][ T9411] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 86.901758][ T9411] 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 [ 86.921386][ T9411] RSP: 0018:ffffc90001da7940 EFLAGS: 00010202 [ 86.927551][ T9411] RAX: dffffc0000000000 RBX: ffff8880a5288b00 RCX: ffffffff86777d02 [ 86.935547][ T9411] RDX: 0000000000000275 RSI: ffffffff86777a89 RDI: 00000000000013a8 [ 86.943556][ T9411] RBP: ffffc90001da7970 R08: ffff88808d2c8500 R09: ffffed1015d0703d [ 86.951554][ T9411] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 86.959596][ T9411] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff86777e40 [ 86.967554][ T9411] FS: 0000000001bfc880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 86.976514][ T9411] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 86.983132][ T9411] CR2: 00000000200008e0 CR3: 00000000a7953000 CR4: 00000000001406f0 [ 86.991138][ T9411] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 86.999124][ T9411] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.007086][ T9411] Kernel panic - not syncing: Fatal exception [ 87.014547][ T9411] Kernel Offset: disabled [ 87.018869][ T9411] Rebooting in 86400 seconds..