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authorSiddhesh Poyarekar <siddhesh@redhat.com>2013-05-29 21:30:20 +0530
committerSiddhesh Poyarekar <siddhesh@redhat.com>2013-05-29 21:34:12 +0530
commitb937534868c8d7aec3b6d645bf5fd657bbfccd42 (patch)
tree18936faaea13f35bcaf698f97447752c0e1c4567 /elf/dl-lookup.c
parentd0501bfbe228897c17875fcead8809d017135d6f (diff)
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Avoid crashing in LD_DEBUG when program name is unavailable
Resolves: #15465 The program name may be unavailable if the user application tampers with argc and argv[]. Some parts of the dynamic linker caters for this while others don't, so this patch consolidates the check and fallback into a single macro and updates all users.
Diffstat (limited to 'elf/dl-lookup.c')
-rw-r--r--elf/dl-lookup.c22
1 files changed, 7 insertions, 15 deletions
diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c
index 68f8dac..39f463e 100644
--- a/elf/dl-lookup.c
+++ b/elf/dl-lookup.c
@@ -112,8 +112,7 @@ do_lookup_x (const char *undef_name, uint_fast32_t new_hash,
/* Print some debugging info if wanted. */
if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_SYMBOLS, 0))
_dl_debug_printf ("symbol=%s; lookup in file=%s [%lu]\n",
- undef_name,
- map->l_name[0] ? map->l_name : rtld_progname,
+ undef_name, DSO_FILENAME (map->l_name),
map->l_ns);
/* If the hash table is empty there is nothing to do here. */
@@ -667,10 +666,9 @@ add_dependency (struct link_map *undef_map, struct link_map *map, int flags)
if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_FILES, 0))
_dl_debug_printf ("\
\nfile=%s [%lu]; needed by %s [%lu] (relocation dependency)\n\n",
- map->l_name[0] ? map->l_name : rtld_progname,
+ DSO_FILENAME (map->l_name),
map->l_ns,
- undef_map->l_name[0]
- ? undef_map->l_name : rtld_progname,
+ DSO_FILENAME (undef_map->l_name),
undef_map->l_ns);
}
else
@@ -751,9 +749,7 @@ _dl_lookup_symbol_x (const char *undef_name, struct link_map *undef_map,
const char *reference_name = undef_map ? undef_map->l_name : NULL;
/* XXX We cannot translate the message. */
- _dl_signal_cerror (0, (reference_name[0]
- ? reference_name
- : (rtld_progname ?: "<main program>")),
+ _dl_signal_cerror (0, DSO_FILENAME (reference_name),
N_("relocation error"),
make_string ("symbol ", undef_name, ", version ",
version->name,
@@ -780,9 +776,7 @@ _dl_lookup_symbol_x (const char *undef_name, struct link_map *undef_map,
? version->name : "");
/* XXX We cannot translate the message. */
- _dl_signal_cerror (0, (reference_name[0]
- ? reference_name
- : (rtld_progname ?: "<main program>")),
+ _dl_signal_cerror (0, DSO_FILENAME (reference_name),
N_("symbol lookup error"),
make_string (undefined_msg, undef_name,
versionstr, versionname));
@@ -912,11 +906,9 @@ _dl_debug_bindings (const char *undef_name, struct link_map *undef_map,
if (GLRO(dl_debug_mask) & DL_DEBUG_BINDINGS)
{
_dl_debug_printf ("binding file %s [%lu] to %s [%lu]: %s symbol `%s'",
- (reference_name[0]
- ? reference_name
- : (rtld_progname ?: "<main program>")),
+ DSO_FILENAME (reference_name),
undef_map->l_ns,
- value->m->l_name[0] ? value->m->l_name : rtld_progname,
+ DSO_FILENAME (value->m->l_name),
value->m->l_ns,
protected ? "protected" : "normal", undef_name);
if (version)