Wireshark-bugs: [Wireshark-bugs] [Bug 9027] Another fuzz failure in print_hex_data_buffer

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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Sun, 11 Aug 2013 13:52:35 +0000

Comment # 6 on bug 9027 from 
(In reply to comment #5)
> Quite interesting, what is NULL? 

** (process:22656): WARNING **: Dissector bug, protocol TCP, in packet 225:
tvbuff.c:134: failed assertion "child"

> old_tvb_data can't be because we check it line above,
> tvb? Quite not possible...

So old_tvb_data is NULL somehow. I don't see the check you refer to - did you
mean fd_i->tvb_data? Replacing the line with "tvb_add_to_chain(tvb,
fd_i->tvb_data)" does not solve the use-after-free error.

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