Bash's malloc does not work within qemu-user when compiled with PIE enabled

[Raphael Hertzog]

Hello,

in Debian we wanted to build bash with PIE enabled [1], but we discovered that
bash was broken under qemu-user when it was compiled that way [2].

It turns out that it's broken only when it uses bash's malloc
implementation. If we build bash with PIE and --without-bash-malloc then
we don't have the problem.

It would be nice if bash's malloc implementation could be fixed to also
work under qemu-user.

This was all tested with 4.4 patchlevel 18.

[1] https://bugs.debian.org/865599
    https://manpages.debian.org/unstable/dpkg-dev/dpkg-buildflags.1.en.html
    (see section about "pie", basically we add -fPIE to CFLAGS and -fPIE -pie to
    LDFLAGS)
[2] https://bugs.debian.org/889869
-- 
Raphaël Hertzog ◈ Debian Developer

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