Re: Unhandled exception

[Anders Broman <anders.broman () ericsson com>]

Hi,
At  the very least we should have a test step activating all protocols and starting the application.
As they are disabled by default perhaps fussing is overkill, they might prolong fussing time unduly?
Regards
Anders

From: Wireshark-dev <wireshark-dev-bounces () wireshark org> On Behalf Of Maynard, Chris
Sent: den 18 september 2018 15:36
To: Developer support list for Wireshark <wireshark-dev () wireshark org>
Subject: Re: [Wireshark-dev] Unhandled exception

Thanks.

Should the fuzz tester(s) enable all dissectors by default?  If I “enable all protocols”, then currently the 
enabled_protos file lists these 3: prp, stcsig and transum.
- Chris

From: Wireshark-dev [mailto:wireshark-dev-bounces () wireshark org] On Behalf Of Pascal Quantin
Sent: Tuesday, September 18, 2018 4:26 AM
To: Developer support list for Wireshark <wireshark-dev () wireshark org<mailto:wireshark-dev () wireshark org>>
Subject: Re: [Wireshark-dev] Unhandled exception

https://code.wireshark.org/review/c/29715/

Cheers,
Pascal.

Le mar. 18 sept. 2018 à 10:22, Pascal Quantin <pascal.quantin () gmail com<mailto:pascal.quantin () gmail com>> a écrit 
:
I'm uploading a patch.

Pascal.

Le mar. 18 sept. 2018 à 10:20, Pascal Quantin <pascal.quantin () gmail com<mailto:pascal.quantin () gmail com>> a écrit 
:
Hi Anders,

Le mar. 18 sept. 2018 à 10:19, Anders Broman <anders.broman () ericsson com<mailto:anders.broman () ericsson com>> a 
écrit :
Hi,
I think that the problem is that one of these fields has changed name, but debugging the registration phase is hard on 
Windows as the console is not open...GRR

this seems to be the ssl.record.content_type field.
We should check if we can make Transum more robust to this kind of errors in the future.


* The following are the field ids for the protocol values used by TRANSUM.
    Make sure they line up with ehf_of_interest order */
HF_OF_INTEREST_INFO hf_of_interest[HF_INTEREST_END_OF_LIST] = {
    { -1, "ip.proto" },
    { -1, "ipv6.nxt" },

    { -1, "tcp.analysis.retransmission" },
    { -1, "tcp.analysis.keep_alive" },
    { -1, "tcp.flags.syn" },
    { -1, "tcp.flags.ack" },
    { -1, "tcp.flags.reset" },
    { -1, "tcp.flags.urg" },
    { -1, "tcp.seq" },
    { -1, "tcp.srcport" },
    { -1, "tcp.dstport" },
    { -1, "tcp.stream" },
    { -1, "tcp.len" },

    { -1, "udp.srcport" },
    { -1, "udp.dstport" },
    { -1, "udp.stream" },
    { -1, "udp.length" },

    { -1, "ssl.record.content_type" },

    { -1, "tds.type" },
    { -1, "tds.length" },

    { -1, "smb.mid" },

    { -1, "smb2.sesid" },
    { -1, "smb2.msg_id" },
    { -1, "smb2.cmd" },

    { -1, "dcerpc.ver" },
    { -1, "dcerpc.pkt_type" },
    { -1, "dcerpc.cn_call_id" },
    { -1, "dcerpc.cn_ctx_id" },

    { -1, "dns.id<http://dns.id>"},
};
Regards
Anders

-----Original Message-----
From: Wireshark-dev <wireshark-dev-bounces () wireshark org<mailto:wireshark-dev-bounces () wireshark org>> On Behalf 
Of João Valverde
Sent: den 18 september 2018 10:10
To: wireshark-dev () wireshark org<mailto:wireshark-dev () wireshark org>
Subject: Re: [Wireshark-dev] Unhandled exception



On 18/09/18 01:07, Maynard, Chris wrote:
> Thanks for the tips Richard, but after some additional testing and some head-scratching, I discovered the source of 
> the problem was something in my profile, because if I switched to a pristine profile, then master ran fine.  Through 
> divide-and-conquer/trial-and-error, I discovered that it was due to enabling the transum dissector, although I can't 
> figure out why enabling the transum dissector causes this, and then only for master.  Enabling it for 2.6.2 seems 
> fine.
>
> Maybe someone could just confirm if they also experience this exception if they enable the transum dissector?  If 
> confirmed, I will file a bug report.

Confirmed on the latest master. Enabling transum crashes wireshark.

> The exception, for reference:
>
> Unhandled exception ("proto.c:6497: failed assertion "(guint)hfid < gpa_hfinfo.len" (Unregistered hf!)", group=1, 
> code=6)
>
> Thanks.
> - Chris
>
> -----Original Message-----
> From: Wireshark-dev [mailto:wireshark-dev-bounces () wireshark org<mailto:wireshark-dev-bounces () wireshark org>] On 
> Behalf Of Richard Sharpe
> Sent: Monday, September 17, 2018 4:22 PM
> To: Developer support list for Wireshark <wireshark-dev () wireshark org<mailto:wireshark-dev () wireshark org>>
> Subject: Re: [Wireshark-dev] Unhandled exception
>
> <snip>











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