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SELinux: memory leak in security_context_to_sid_core

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Fix a bug and a philosophical decision about who handles errors.

security_context_to_sid_core() was leaking a context in the common case.
This was causing problems on fedora systems which recently have started
making extensive use of this function.

In discussion it was decided that if string_to_context_struct() had an
error it was its own responsibility to clean up any mess it created
along the way.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Eric Paris 2008-09-03 11:49:47 -04:00 committed by James Morris
parent ec0c15afb4
commit 8e531af90f
1 changed files with 3 additions and 3 deletions
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6
security/selinux/ss/services.c
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@ -811,11 +811,12 @@ static int string_to_context_struct(struct policydb *pol,
/* Check the validity of the new context. */
if (!policydb_context_isvalid(pol, ctx)) {
rc = -EINVAL;
context_destroy(ctx);
goto out;
}
rc = 0;
out:
if (rc)
context_destroy(ctx);
return rc;
}
@ -868,8 +869,7 @@ static int security_context_to_sid_core(const char *scontext, u32 scontext_len,
} else if (rc)
goto out;
rc = sidtab_context_to_sid(&sidtab, &context, sid);
if (rc)
context_destroy(&context);
context_destroy(&context);
out:
read_unlock(&policy_rwlock);
kfree(scontext2);