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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>
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2 changed files with 5 additions and 0 deletions
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@ -242,6 +242,8 @@ int cond_read_bool(struct policydb *p, struct hashtab *h, void *fp)
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goto err;
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len = le32_to_cpu(buf[2]);
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if (((len == 0) || (len == (u32)-1)))
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goto err;
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rc = -ENOMEM;
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key = kmalloc(len + 1, GFP_KERNEL);
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@ -1094,6 +1094,9 @@ static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
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int rc;
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char *str;
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if ((len == 0) || (len == (u32)-1))
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return -EINVAL;
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str = kmalloc(len + 1, flags);
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if (!str)
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return -ENOMEM;
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