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Buffer Overflow / Stack Canary #4542

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adontz opened this issue Feb 24, 2020 · 3 comments
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Buffer Overflow / Stack Canary #4542

adontz opened this issue Feb 24, 2020 · 3 comments
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question No questions on the issue tracker, please.
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0.6.0

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@adontz
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adontz commented Feb 24, 2020

https://en.wikipedia.org/wiki/Buffer_overflow_protection#Canaries

Just curious what is the current status / future plans?
@Sobeston
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I know LLVM has SafeStack. No idea if it's enabled.

@LemonBoy
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We have stack probes on x86/x64 for both libc and stand-alone builds. Stack protection for libc-less targets is tracked in #276, enabling it requires a few lines of code and a decision on whether the TLS should always be allocated or not.

@adontz adontz mentioned this issue Feb 24, 2020
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@andrewrk andrewrk added this to the 0.6.0 milestone Feb 29, 2020
@andrewrk andrewrk added the question No questions on the issue tracker, please. label Feb 29, 2020
@andrewrk
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Stack overflow detection is enabled by default in safe build modes.

It's also planned for zig to have safe recursion (#1006) and in general to have a compile-time known stack upper bound (#157).

Parzival-3141 added a commit to Parzival-3141/Bare-Bones that referenced this issue Aug 15, 2023
@Parzival-3141
stack protection
9248869 
Stack smash protection currently only works on targets with libc,
but stack overflow detection is enabled by default in safe build modes.
See ziglang/zig#4542.
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