[gnutls-devel] GnuTLS | Allocate pathname on heap instead of on stack (!1493)
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Fri Dec 10 16:51:18 CET 2021
Daiki Ueno commented on a discussion: https://gitlab.com/gnutls/gnutls/-/merge_requests/1493#note_763824715
It was considered; see the description of this MR and the linked comment to Gnulib's maint.mk, which I'm expanding it for handy:
# Even if you use pathmax.h to guarantee that PATH_MAX is defined, it might
# not be constant, or might overflow a stack. In general, use PATH_MAX as
# a limit, not an array or alloca size.
@prohibit='(\balloca *\([^)]*|\[[^]]*)\bPATH_MAX' \
halt='Avoid stack allocations of size PATH_MAX' \
So if we go that way, you will get the error at `make syntax-check`.
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