Wireshark · Wireshark-bugs: [Wireshark-bugs] [Bug 1001] free() invalid pointer in dissect_802_3 at packet-ieee8023.c:71

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http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=1001





------- Comment #12 from gentoo-a7x@xxxxxxxxxxxxxxx  2006-07-28 11:21 GMT -------
(In reply to comment #8)
> Something to note:  The definition of ENDTRY has a line calling
> except_free(except_ch.except_obj.except_dyndata).  According to the gdb
> backtrace, that value being passed is 0x0.  Yet except_free() is reporting 
> that the pointer it was passed is 0xbfb53db8.  I wonder if I should just chalk 
> this up to another case of gdb strangeness...

I inserted the following line at epan/dissectors/packet-ieee8023.c line 71:

fprintf(stderr, "(%s line %i) except_ch.except_obj.except_dyndata is %p\n",
__FILE__, __LINE__, except_ch.except_obj.except_dyndata);

and got the following output:

(packet-ieee8023.c line 71) except_ch.except_obj.except_dyndata is 0xbf852f88
(except.c line 372) ptr is 0xbf852f88
*** glibc detected *** free(): invalid pointer: 0xbf852f88 ***
Aborted (core dumped)

The gdb backtrace showed 0x0, so it looks like the mismatch is a gdb problem.


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