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"RPC dissector bug" response when examining an "unknown" RPC program

asked 2024-10-09 15:12:05 +0000

Note: this worked before 4.4.0...

I am looking at a simple trace of a ClearCase operation, which involves communicating with the ClearCase albd server and another ClearCase server process on the same host. (The "credmap server" process, with RPC program number 390521)

When I have "Preferences/Protocols/RPC/Attempt to decode Unknown RPC's" enabled, I get a message in the trace reading: [Dissector bug, protocol RPC: C:\gitlab-builds\builds\MsQ3pox2\0\wireshark\wireshark\epan\proto.c:4373: failed assertion "hfindex > 0 && (unsigned)hfindex < gpa_hfinfo.len" (Unregistered hf!)]

Any ideas? It's not critical since All I really care about is the program, version, procedure and whether it sent a good reply... But having EVERY RPC blurting that error is frustrating.

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I can provide the sample trace, as I did this in a non-production environment.

Tronmech gravatar imageTronmech ( 2024-10-09 15:12:40 +0000 )edit

Can you place it on a public file share then update the question with a link to it?
Also would help if the question includes the output of wireshark -v or contents of Help->About Wireshark:Wireshark tab.

Chuckc gravatar imageChuckc ( 2024-10-09 17:16:30 +0000 )edit

Open an issue in Gitlab and post the capture file there please and it will be fixed. https://gitlab.com/wireshark/wireshar...

johnthacker gravatar imagejohnthacker ( 2024-10-09 21:23:15 +0000 )edit

https://gitlab.com/wireshark/wireshar... fixes it. That should make it into the 4.4.2 release.

johnthacker gravatar imagejohnthacker ( 2024-10-11 14:52:42 +0000 )edit

Opened a fresh bug just in case... The capture is attached.

Tronmech gravatar imageTronmech ( 2024-10-11 16:40:42 +0000 )edit

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answered 2024-10-11 15:01:33 +0000

johnthacker gravatar image

It's a bug. https://gitlab.com/wireshark/wireshar... should fix it

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Asked: 2024-10-09 15:12:05 +0000

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Last updated: Oct 11