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libsepol: sepol_av_to_string: clear static buffer

Message ID 1480436565-30641-1-git-send-email-sds@tycho.nsa.gov (mailing list archive)
State Not Applicable
Headers show

Commit Message

Stephen Smalley Nov. 29, 2016, 4:22 p.m. UTC 
chenxiaolong reported this via
https://github.com/SELinuxProject/selinux/issues/23

A nicer fix would be to rework the interface to be more
like security_av_string() in libselinux, but that requires
updating all callers.

Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
---
 libsepol/src/util.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/libsepol/src/util.c b/libsepol/src/util.c
index ff8f7f2..b00251c 100644
--- a/libsepol/src/util.c
+++ b/libsepol/src/util.c
@@ -89,6 +89,7 @@  char *sepol_av_to_string(policydb_t * policydbp, uint32_t tclass,
 	int rc;
 	int avlen = 0, len;
 
+	memset(avbuf, 0, sizeof avbuf);
 	cladatum = policydbp->class_val_to_struct[tclass - 1];
 	p = avbuf;
 	for (i = 0; i < cladatum->permissions.nprim; i++) {