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commit bfb5ed5df3dd4d9507b4922248dc445b690d19c0
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Author: H.J. Lu <hjl.tools@gmail.com>
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Date: Fri Oct 15 10:44:49 2021 -0700
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elf: Also try DT_RUNPATH for LD_AUDIT dlopen [BZ #28455]
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DT_RUNPATH is only used to find the immediate dependencies of the
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executable or shared object containing the DT_RUNPATH entry. Update
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LD_AUDIT dlopen call to try the DT_RUNPATH entry of the executable.
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Add tst-audit14a, which is copied from tst-audit14, to DT_RUNPATH and
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build tst-audit14 with -Wl,--disable-new-dtags to test DT_RPATH.
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This partially fixes BZ #28455.
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Conflicts:
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elf/Makefile
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Rewrite test inclusion to use older stdout pattern.
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diff --git a/elf/Makefile b/elf/Makefile
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index 914cb5ad2f2c3aea..4ec4e9a049156755 100644
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--- a/elf/Makefile
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+++ b/elf/Makefile
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@@ -227,6 +227,7 @@ tests += \
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tst-audit12 \
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tst-audit13 \
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tst-audit14 \
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+ tst-audit14a \
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tst-audit15 \
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tst-audit16 \
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tst-audit17 \
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@@ -1788,9 +1789,11 @@ $(objpfx)tst-auditmany.out: $(objpfx)tst-auditmanymod1.so \
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tst-auditmany-ENV = \
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LD_AUDIT=tst-auditmanymod1.so:tst-auditmanymod2.so:tst-auditmanymod3.so:tst-auditmanymod4.so:tst-auditmanymod5.so:tst-auditmanymod6.so:tst-auditmanymod7.so:tst-auditmanymod8.so:tst-auditmanymod9.so
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-LDFLAGS-tst-audit14 = -Wl,--audit=tst-auditlogmod-1.so
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+LDFLAGS-tst-audit14 = -Wl,--audit=tst-auditlogmod-1.so,--disable-new-dtags
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$(objpfx)tst-auditlogmod-1.so: $(libsupport)
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$(objpfx)tst-audit14.out: $(objpfx)tst-auditlogmod-1.so
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+LDFLAGS-tst-audit14a = -Wl,--audit=tst-auditlogmod-1.so,--enable-new-dtags
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+$(objpfx)tst-audit14a.out: $(objpfx)tst-auditlogmod-1.so
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LDFLAGS-tst-audit15 = \
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-Wl,--audit=tst-auditlogmod-1.so,--depaudit=tst-auditlogmod-2.so
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$(objpfx)tst-auditlogmod-2.so: $(libsupport)
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diff --git a/elf/dl-load.c b/elf/dl-load.c
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index 1613217a236c7fc3..0b45e6e3db31c70d 100644
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--- a/elf/dl-load.c
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+++ b/elf/dl-load.c
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@@ -2042,6 +2042,21 @@ _dl_map_object (struct link_map *loader, const char *name,
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&main_map->l_rpath_dirs,
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&realname, &fb, loader ?: main_map, LA_SER_RUNPATH,
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&found_other_class);
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+
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+ /* Also try DT_RUNPATH in the executable for LD_AUDIT dlopen
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+ call. */
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+ if (__glibc_unlikely (mode & __RTLD_AUDIT)
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+ && fd == -1 && !did_main_map
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+ && main_map != NULL && main_map->l_type != lt_loaded)
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+ {
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+ struct r_search_path_struct l_rpath_dirs;
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+ l_rpath_dirs.dirs = NULL;
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+ if (cache_rpath (main_map, &l_rpath_dirs,
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+ DT_RUNPATH, "RUNPATH"))
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+ fd = open_path (name, namelen, mode, &l_rpath_dirs,
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+ &realname, &fb, loader ?: main_map,
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+ LA_SER_RUNPATH, &found_other_class);
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+ }
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}
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/* Try the LD_LIBRARY_PATH environment variable. */
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diff --git a/elf/tst-audit14a.c b/elf/tst-audit14a.c
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new file mode 100644
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index 0000000000000000..c6232eacf2946e4e
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--- /dev/null
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+++ b/elf/tst-audit14a.c
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@@ -0,0 +1 @@
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+#include "tst-audit14.c"
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