build: bundle-libraries.sh: patch bundled ld.so
Remove references to /etc/, /lib/ and /usr/ from the bundled ld.so interpreter using simple binary patching. This is needed to prevent loading host system libraries such as libnss_compat.so.2 on foreign systems, which may result in ld.so inconsistency assertions. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
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@ -97,6 +97,18 @@ _runas_so() {
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}
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}
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_patch_ldso() {
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_cp "$1" "$1.patched"
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sed -i -e 's,/\(usr\|lib\|etc\)/,/###/,g' "$1.patched"
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if "$1.patched" 2>&1 | grep -q -- --library-path; then
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_mv "$1.patched" "$1"
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else
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echo "binary patched ${1##*/} not executable, using original" >&2
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rm -f "$1.patched"
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fi
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}
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for LDD in ${PATH//://ldd }/ldd; do
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"$LDD" --version >/dev/null 2>/dev/null && break
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LDD=""
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@ -135,6 +147,7 @@ for BIN in "$@"; do
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[ -f "$token" -a ! -f "$dest" ] && {
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_md "$ddir"
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_cp "$token" "$dest"
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[ -n "$LDSO" ] && _patch_ldso "$dest"
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}
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;; esac
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done
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