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fix ldso reserved library name handling

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If a DT_NEEDED entry was the prefix of a reserved library name
(up to the first dot) then it was incorrectly treated as a libc
reserved name.

e.g. libp.so dependency was not loaded as it matched libpthread
reserved name.
This commit is contained in:
Szabolcs Nagy 2016-11-01 02:49:09 +01:00 committed by Rich Felker
parent 86e8cc0fd4
commit 5ffe515ca4
1 changed files with 19 additions and 19 deletions
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38
ldso/dynlink.c
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@ -906,27 +906,27 @@ static struct dso *load_library(const char *name, struct dso *needed_by)
/* Catch and block attempts to reload the implementation itself */
if (name[0]=='l' && name[1]=='i' && name[2]=='b') {
static const char reserved[] =
"c\0pthread\0rt\0m\0dl\0util\0xnet\0";
const char *rp;
char *z = strchr(name, '.');
if (z) {
size_t l = z-name;
for (rp=reserved; *rp && strncmp(name+3, rp, l-3); rp+=strlen(rp)+1);
if (*rp) {
if (ldd_mode) {
/* Track which names have been resolved
* and only report each one once. */
static unsigned reported;
unsigned mask = 1U<<(rp-reserved);
if (!(reported & mask)) {
reported |= mask;
dprintf(1, "\t%s => %s (%p)\n",
name, ldso.name,
ldso.base);
}
"c.pthread.rt.m.dl.util.xnet.";
const char *rp, *next;
for (rp=reserved; *rp; rp=next) {
next = strchr(rp, '.') + 1;
if (strncmp(name+3, rp, next-rp) == 0)
break;
}
if (*rp) {
if (ldd_mode) {
/* Track which names have been resolved
* and only report each one once. */
static unsigned reported;
unsigned mask = 1U<<(rp-reserved);
if (!(reported & mask)) {
reported |= mask;
dprintf(1, "\t%s => %s (%p)\n",
name, ldso.name,
ldso.base);
}
is_self = 1;
}
is_self = 1;
}
}
if (!strcmp(name, ldso.name)) is_self = 1;