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elf: Ignore loader debug env vars for setuid

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Loader already ignores LD_DEBUG, LD_DEBUG_OUTPUT, and
LD_TRACE_LOADED_OBJECTS. Both LD_WARN and LD_VERBOSE are similar to
LD_DEBUG, in the sense they enable additional checks and debug
information, so it makes sense to disable them.

Also add both LD_VERBOSE and LD_WARN on filtered environment variables
for setuid binaries.

Checked on x86_64-linux-gnu.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
This commit is contained in:
Adhemerval Zanella
2023-11-22 17:43:23 -03:00
parent f85722f9cd
commit 876a12e513
3 changed files with 20 additions and 8 deletions
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4
elf/tst-env-setuid.c
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@@ -59,6 +59,10 @@ static const struct envvar_t filtered_envvars[] =
{ "MALLOC_TRACE", FILTERED_VALUE },
{ "MALLOC_TRIM_THRESHOLD_", FILTERED_VALUE },
{ "RES_OPTIONS", FILTERED_VALUE },
{ "LD_DEBUG", "all" },
{ "LD_DEBUG_OUTPUT", "/tmp/some-file" },
{ "LD_WARN", FILTERED_VALUE },
{ "LD_VERBOSE", FILTERED_VALUE },
};
static const struct envvar_t unfiltered_envvars[] =