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authorEric Paris <eparis@redhat.com>2012-08-24 15:59:00 -0400
committerEric Paris <eparis@redhat.com>2013-07-25 13:02:58 -0400
commitaf8e50cc7d546c508e9091bbbdf3cf8b243bd8cd (patch)
tree9e0dde9b982f805c8260800163532888ed06869f /security/selinux
parentd355987f47bbe24e7450b509a3f8aac0db88b65a (diff)
SELinux: use define for number of bits in the mnt flags mask
We had this random hard coded value of '8' in the code (I put it there) for the number of bits to check for mount options. This is stupid. Instead use the #define we already have which tells us the number of mount options. Signed-off-by: Eric Paris <eparis@redhat.com>
Diffstat (limited to 'security/selinux')
-rw-r--r--security/selinux/hooks.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 863f2059018..e13d65a6210 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -466,9 +466,12 @@ static int selinux_get_mnt_opts(const struct super_block *sb,
if (!ss_initialized)
return -EINVAL;
+ /* make sure we always check enough bits to cover the mask */
+ BUILD_BUG_ON(SE_MNTMASK >= (1 << NUM_SEL_MNT_OPTS));
+
tmp = sbsec->flags & SE_MNTMASK;
/* count the number of mount options for this sb */
- for (i = 0; i < 8; i++) {
+ for (i = 0; i < NUM_SEL_MNT_OPTS; i++) {
if (tmp & 0x01)
opts->num_mnt_opts++;
tmp >>= 1;