[PATCH 4/4] libselinux: audit2why: fix build warnings

[Stephen Smalley]

Fix the following build warnings.

audit2why.c: In function ‘__policy_init’:
audit2why.c:207:22: warning: ‘%s’ directive output may be truncated writing up 
to 4095 bytes into a region of size 4081 [-Wformat-truncation=]
      "unable to open %s:  %s\n",
                      ^~
      path, strerror(errno));
      ~~~~
audit2why.c:206:4: note: ‘snprintf’ output 20 or more bytes (assuming 4115) 
into a destination of size 4096
    snprintf(errormsg, sizeof(errormsg),
    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      "unable to open %s:  %s\n",
      ~~~~~~~~~~~~~~~~~~~~~~~~~~~
      path, strerror(errno));
      ~~~~~~~~~~~~~~~~~~~~~~
audit2why.c:253:28: warning: ‘%s’ directive output may be truncated writing up 
to 4095 bytes into a region of size 4074 [-Wformat-truncation=]
     "invalid binary policy %s\n", path);
                            ^~     ~~~~
audit2why.c:252:3: note: ‘snprintf’ output between 24 and 4119 bytes into a 
destination of size 4096
   snprintf(errormsg, sizeof(errormsg),
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     "invalid binary policy %s\n", path);
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Stephen Smalley <s...@tycho.nsa.gov>
---
 libselinux/src/audit2why.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libselinux/src/audit2why.c b/libselinux/src/audit2why.c
index 857383ac..0331fdfd 100644
--- a/libselinux/src/audit2why.c
+++ b/libselinux/src/audit2why.c
@@ -193,7 +193,7 @@ static int __policy_init(const char *init_path)
 {
        FILE *fp;
        char path[PATH_MAX];
-       char errormsg[PATH_MAX];
+       char errormsg[PATH_MAX+1024+20];
        struct sepol_policy_file *pf = NULL;
        int rc;
        unsigned int cnt;
-- 
2.14.3