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env: throw an error when an empty key is used

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If the environment contains an entry like "=value" "\0" we should throw
an error when parsing the environment. Otherwise, U-Boot will enter in
an infinite loop.

Signed-off-by: Lucian Cojocar <cojocar@gmail.com>
This commit is contained in:
Lucian Cojocar 2013-04-28 11:31:57 +00:00 • committed by Tom Rini
parent d642c467a0
commit e4fdcadd8a
1 changed files with 6 additions and 0 deletions
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6
lib/hashtable.c
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@ -901,6 +901,12 @@ int himport_r(struct hsearch_data *htab,
*sp++ = '\0'; /* terminate value */ *sp++ = '\0'; /* terminate value */
++dp; ++dp;
if (*name == 0) {
debug("INSERT: unable to use an empty key\n");
__set_errno(EINVAL);
return 0;
}
/* Skip variables which are not supposed to be processed */ /* Skip variables which are not supposed to be processed */
if (!drop_var_from_set(name, nvars, localvars)) if (!drop_var_from_set(name, nvars, localvars))
continue; continue;