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authorWilliam Roberts <william.c.roberts@intel.com>2016-08-30 19:28:11 +0300
committerPaul Moore <paul@paul-moore.com>2016-08-30 22:45:50 +0300
commit7c686af071ade663d0995aa30b262495a6c68c88 (patch)
treedc9d17f0b475edc7c371475a33fa8683eb3802cd /security
parent3bc7bcf69bbe763359454b2c40efcba22730e181 (diff)
downloadlinux-7c686af071ade663d0995aa30b262495a6c68c88.tar.xz
selinux: fix overflow and 0 length allocations
Throughout the SELinux LSM, values taken from sepolicy are used in places where length == 0 or length == <saturated> matter, find and fix these. Signed-off-by: William Roberts <william.c.roberts@intel.com> Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'security')
-rw-r--r--security/selinux/ss/conditional.c2
-rw-r--r--security/selinux/ss/policydb.c3
2 files changed, 5 insertions, 0 deletions
diff --git a/security/selinux/ss/conditional.c b/security/selinux/ss/conditional.c
index 456e1a9bcfde..34afeadd9e73 100644
--- a/security/selinux/ss/conditional.c
+++ b/security/selinux/ss/conditional.c
@@ -242,6 +242,8 @@ int cond_read_bool(struct policydb *p, struct hashtab *h, void *fp)
goto err;
len = le32_to_cpu(buf[2]);
+ if (((len == 0) || (len == (u32)-1)))
+ goto err;
rc = -ENOMEM;
key = kmalloc(len + 1, GFP_KERNEL);
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index 4b243855ed7b..8c661f0451ec 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -1094,6 +1094,9 @@ static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
int rc;
char *str;
+ if ((len == 0) || (len == (u32)-1))
+ return -EINVAL;
+
str = kmalloc(len + 1, flags);
if (!str)
return -ENOMEM;