oss-sec mailing list archives
Re: Interesting behavior with struct initiailization
From: Bhadrinath <bitstrat () gmail com>
Date: Sun, 5 Dec 2010 20:52:46 +0000 (UTC)
There was a specific concern in the previous posts. "Even if the memset is not removed, a compiler could implement 'x.b = 2' by -setting the low byte of a 32-bit register to 2, leaving the high bytes unchanged -storing all 32 bits of the register into memory which would store nonzero data in the high bytes, possibly containing sensitive information. " In this case,even after doing a memset the compiler could copy some sensitive information from the 32 bit register into the padding bytes. So, I feel it is necessary to implement it by copying it to a new equivalent struct. Regards Bhadrinath
Current thread:
- Re: Interesting behavior with struct initiailization Geoff Keating (Nov 29)
- RE: Interesting behavior with struct initiailization Robert Seacord (Dec 03)
- Re: Interesting behavior with struct initiailization Geoff Keating (Dec 03)
- Re: Interesting behavior with struct initiailization Bhadrinath (Dec 05)
- Re: Interesting behavior with struct initiailization Bhadrinath (Dec 05)
- Re: Re: Interesting behavior with struct initiailization Dan Rosenberg (Dec 05)
- Re: Interesting behavior with struct initiailization Bhadrinath (Dec 05)
- Re: Interesting behavior with struct initiailization Geoff Keating (Dec 03)
- RE: Interesting behavior with struct initiailization Robert Seacord (Dec 03)