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authorRich Felker <dalias@aerifal.cx>2012-05-04 22:51:59 -0400
committerRich Felker <dalias@aerifal.cx>2012-05-04 22:51:59 -0400
commit7e4d79464adc3140b03f6e92a902d061c99b9ebe (patch)
tree9ba88cd3bcefe5bb23234c21de44dbc550d779d6 /configure
parentf8e054f95197bf9c4463122fba3ebc586d4a99f6 (diff)
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make pthread stacks non-executable
this change is necessary or pthread_create will always fail on
security-hardened kernels. i considered first trying to make the stack
executable and simply retrying without execute permissions when the
first try fails, but (1) this would incur a serious performance
penalty on hardened systems, and (2) having the stack be executable is
just a bad idea from a security standpoint.

if there is real-world "GNU C" code that uses nested functions with
threads, and it can't be fixed, we'll have to consider other ways of
solving the problem, but for now this seems like the best fix.
Diffstat (limited to 'configure')
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