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librc/librc-depend.c: fix NULL pointer dereference

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In some cases deptree or depinfo can be NULL, check
before dereferencing.

Fixes https://github.com/OpenRC/openrc/issues/293
Fixes https://github.com/OpenRC/openrc/pulls/294
X-Gentoo-Bug: 659906
X-Gentoo-Bug-URL: https://bugs.gentoo.org/659906
This commit is contained in:
Georgy Yakovlev 2019-02-21 14:24:44 -08:00 committed by William Hubbs
parent 065b7ecc0d
commit 7478c104fc
1 changed files with 10 additions and 7 deletions
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5
src/librc/librc-depend.c
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@ -84,10 +84,11 @@ static RC_DEPINFO *
get_depinfo(const RC_DEPTREE *deptree, const char *service) get_depinfo(const RC_DEPTREE *deptree, const char *service)
{ {
RC_DEPINFO *di; RC_DEPINFO *di;
if (deptree) {
TAILQ_FOREACH(di, deptree, entries) TAILQ_FOREACH(di, deptree, entries)
if (strcmp(di->service, service) == 0) if (strcmp(di->service, service) == 0)
return di; return di;
}
return NULL; return NULL;
} }
@ -96,9 +97,11 @@ get_deptype(const RC_DEPINFO *depinfo, const char *type)
{ {
RC_DEPTYPE *dt; RC_DEPTYPE *dt;
if (depinfo) {
TAILQ_FOREACH(dt, &depinfo->depends, entries) TAILQ_FOREACH(dt, &depinfo->depends, entries)
if (strcmp(dt->type, type) == 0) if (strcmp(dt->type, type) == 0)
return dt; return dt;
}
return NULL; return NULL;
} }