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smackfs: Prevent underflow in smk_set_cipso()
[linux-2.6-block.git]
/
security
/
smack
/
smackfs.c
diff --git
a/security/smack/smackfs.c
b/security/smack/smackfs.c
index 2b79c30d4bb6b31678732526010d0ed1ddd39ed0..e22aad7604e8aca2cc6a291a2d824f2e0ed5e536 100644
(file)
--- a/
security/smack/smackfs.c
+++ b/
security/smack/smackfs.c
@@
-896,7
+896,7
@@
static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
}
ret = sscanf(rule, "%d", &catlen);
- if (ret != 1 || catlen > SMACK_CIPSO_MAXCATNUM)
+ if (ret != 1 || catlen
< 0 || catlen
> SMACK_CIPSO_MAXCATNUM)
goto out;
if (format == SMK_FIXED24_FMT &&