Re: Snort3: segfault after "Inspector found in the trash is still use"

["Katura Harvey \(katharve\) via Snort-devel" <snort-devel () lists snort org>]

Hi,

Did this crash generate a coredump file? A full backtrace would be most useful in debugging this, so if you have a 
coredump could you please share it with us? Otherwise we can try to reproduce it or look into how the segfault could 
have occurred in get_switcher(). Can you send us your config and the command line you were using to run snort? How did 
you terminate Snort? Was Snort running normally before you terminated it?

Thanks,
Katura

From: Snort-devel <snort-devel-bounces () lists snort org> on behalf of Meridoff via Snort-devel <snort-devel () lists 
snort org>
Reply-To: Meridoff <oagvozd () gmail com>
Date: Tuesday, October 5, 2021 at 12:22 PM
To: "snort-devel () lists snort org" <snort-devel () lists snort org>
Subject: [Snort-devel] Snort3: segfault after "Inspector found in the trash is still use"

Hello, I have a snort 3.1.8.0 with config with inspector file, where a lot of (10000) rules for blocking files by SHA 
hashes.
All works fine.
But, when I've stopped snort, such messages occured:

Oct 4 15:17:00 srv snort[4850]: ** caught term signal
...
Oct 4 15:17:01 srv snort[4850]: o")~ Snort exiting
...
Oct 4 15:17:02 srv snort[4850]: Inspector found in the trash is still in use: 'smtp'.
Oct 4 15:17:02 srv snort[4850]: Inspector found in the trash is still in use: 'appid'.
Oct 4 15:17:02 srv snort[4850]: Inspector found in the trash is still in use: 'port_scan'.
Oct 4 15:17:02 srv snort[4850]: Inspector found in the trash is still in use: 'so_proxy'.
Oct 4 15:17:02 srv snort[4850]: Inspector found in the trash is still in use: 'binder'.
Oct 4 15:17:02 srv snort[4850]: Inspector found in the trash is still in use: 'ftp_client'.
Oct 4 15:17:02 srv snort[4850]: Inspector found in the trash is still in use: 'file_id'.
Oct 4 15:17:02 srv snort[4850]: Inspector found in the trash is still in use: 'file_log'.

I mean "Inspector found in the trash is still use" - I haven't seen such messages before.

After this SEGFAULT occured :
Oct 4 15:17:02 srv kernel: [22911.382854] snort3[4850]: segfault at 128 ip 00000000004faa59 sp 00007ffcd023e2b8 error 4 
in snort3[446000+287000]
Oct 4 15:17:02 srv kernel: [22911.382859] Code: ff 48 89 df ff 15 47 2a 35 00 48 83 c4 10 5b c3 90 64 48 8b 04 25 68 b7 
fe ff c3 66 0f 1f 44 00 00 64 48 8b 04 25 68 b7 fe ff <48> 8b 80 28 01 00 00 c3 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 
1f

I've looked to binary code and saw that it's happened in get_switcher() function..

Can not found why, cause this function called from many-many places and in term stage too..

May be It's possible to fix it. Though I can not replay this bug. It happened only 1 time for now.

PS: please remove my previous bug-report(wrong theme: "snort2 ...") with the same text but invalid theme ("snort2" 
instead of snort3)

Thanks.

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