Date: Thu, 13 Feb 2020 21:11:03 +0100 From: Markus Wichmann <nullplan@....net> To: musl@...ts.openwall.com Subject: Re: execvp() behaviour with unrecognized file header Hi all, so I had a look around at other implementations, since I thought the problem might be a solved one, and here's what I found: newlib does not support this behavior at all. bionic uses a VLA for the new argv. I didn't even know C++ had VLAs, so at least I learned something from this. glibc also uses a VLA. klibc also does not support this behavior. uclibc-ng is an interesting one. On architectures with MMU they allocate the necessary space with alloca(), but without an MMU, they will use mmap() directly to try and minimize the memory leak, as a comment directly before the code responsible tells us. So yeah, the competition appears to either not bother or just use VLAs. I guess it is not a huge problem in practice? Ciao, Markus
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