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-rw-r--r--security/commoncap.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/security/commoncap.c b/security/commoncap.c
index f800fdb3de9..61669730da9 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -27,6 +27,7 @@
#include <linux/sched.h>
#include <linux/prctl.h>
#include <linux/securebits.h>
+#include <linux/syslog.h>
/*
* If a non-root user executes a setuid-root binary in
@@ -888,13 +889,17 @@ error:
/**
* cap_syslog - Determine whether syslog function is permitted
* @type: Function requested
+ * @from_file: Whether this request came from an open file (i.e. /proc)
*
* Determine whether the current process is permitted to use a particular
* syslog function, returning 0 if permission is granted, -ve if not.
*/
-int cap_syslog(int type)
+int cap_syslog(int type, bool from_file)
{
- if ((type != 3 && type != 10) && !capable(CAP_SYS_ADMIN))
+ if (type != SYSLOG_ACTION_OPEN && from_file)
+ return 0;
+ if ((type != SYSLOG_ACTION_READ_ALL &&
+ type != SYSLOG_ACTION_SIZE_BUFFER) && !capable(CAP_SYS_ADMIN))
return -EPERM;
return 0;
}