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Re: [PATCH] nss_files: Fix /etc/aliases null pointer dereference [BZ #24059]
* Florian Weimer <fweimer@redhat.com> [2019-02-01 18:32:23 +0100]:
> * Szabolcs Nagy:
> >
> > libnss_files.so.2 is not listed as explicit dependency
> > for some reason so it is not loaded at program startup,
> > but after chroot is entered, but it's not available in
> > the chroot so the first api call fails.
>
> There's already this in nss/Makefile:
>
> $(objpfx)tst-nss-files-alias-truncated: $(objpfx)/libnss_files.so
>
> I expected this causes a DT_NEEDED entry to be added to the executable,
> so it is loaded upon startup, outside of the chroot.
it seems debian/ubuntu gcc always passes --as-needed to the linker
https://wiki.debian.org/ToolChain/DSOLinking
so either a reference is needed to the lib or
-Wl,--no-as-needed lib -Wl,--as-needed
ldflag to force a DT_NEEDED.
..or copy the lib to the chroot.