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Test if 'env' is NULL before doing memset() and strlen(),

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the caller may pass NULL to freeenv().
This commit is contained in:
Xin LI 2014-10-23 18:23:50 +00:00
parent bdb4291f89
commit 2735a91d93
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=273552
1 changed files with 1 additions and 1 deletions
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2
sys/kern/kern_environment.c
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@ -262,7 +262,7 @@ void
freeenv(char *env)
{
if (dynamic_kenv) {
if (dynamic_kenv && env != NULL) {
memset(env, 0, strlen(env));
free(env, M_KENV);
}