Bug 337059 – dev-embedded/tigcc _FORTIFY_SOURCE indicates presence of overflow

• Product: Gentoo Linux
• Status: RESOLVED FIXED

[Description Diego Elio Pettenò (RETIRED) 2010-09-13 10:48:24 UTC]

You're receiving this bug because the package in Summary has produced _FORTIFY_SOURCE related warnings indicating the presence of a sure overflow in a static buffer.

Even though this is not always an indication of a security problem it might even be. So please check this out ASAP.

By the way, _FORTIFY_SOURCE is disabled when you disable optimisation, so don't try finding out the cause using -O0.

Thanks,
Your friendly neighborhood tinderboxer

[Comment 1 Diego Elio Pettenò (RETIRED) 2010-09-13 10:49:18 UTC]

Created attachment 247111 [details]
B

[Comment 2 Pacho Ramos 2012-03-19 11:47:30 UTC]

*** Bug 364315 has been marked as a duplicate of this bug. ***

[Comment 3 Chris Reffett (RETIRED) 2012-04-23 22:22:43 UTC]

Created attachment 309881 [details, diff]
tios-signature-fix.patch

The cause of the buffer overflow warnings is that sources/ld-tigcc/formats/tios.h has char Signature[8], when it expects an 8-character input. This is overflowing because there needs to be 9 elements allocated to include room for the null-terminator of the string. I think this patch is sufficient to fix it (I'm not familiar with how to use FORTIFY_SOURCE, but this eliminates the warnings about "warning: call to __builtin___strcpy_chk will always overflow destination buffer". There are also errors about "warning: array subscript is above array bounds" and likewise for below array bounds, I'll look at those next.

[Comment 4 SpanKY 2012-04-30 02:54:07 UTC]

new beta8 version doesn't warn for me