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Undefined behavior in mbedtls_platform_zeroize() #49

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opened 2019-02-11 08:22:07 -06:00 by Patater · 1 comment
Patater commented 2019-02-11 08:22:07 -06:00 (Migrated from github.com)

Description

Calling memset() with a non-NULL buffer argument is undefined in C. mbedtls_platform_zeroize() can end up calling memset() directly (via a function pointer). It might be good to make mbedtls_platform_zeroize() have defined behavior when the buffer argument in NULL and size is 0.

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[ ] Question
[ ] Enhancement
[x] Bug
### Description Calling `memset()` with a non-NULL buffer argument is undefined in C. mbedtls_platform_zeroize() can end up calling `memset()` directly (via a function pointer). It might be good to make `mbedtls_platform_zeroize()` have defined behavior when the buffer argument in NULL and size is 0. ### Issue request type [ ] Question [ ] Enhancement [x] Bug
ciarmcom commented 2019-02-11 15:42:04 -06:00 (Migrated from github.com)

Internal Jira reference: https://jira.arm.com/browse/IOTCRYPT-672

*Internal Jira reference: https://jira.arm.com/browse/IOTCRYPT-672*
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