syslog: Provide stub check_syslog_permissions
When building without CONFIG_PRINTK, we need to provide a stub
check_syslog_permissions. As there is no way to turn on the
dmesg_restrict sysctl without CONFIG_PRINTK, return success.
Reported-by: Jim Davis <jim.epost@gmail.com>
Signed-off-by: Sebastian Schmidt <yath@yath.de>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/include/linux/syslog.h b/include/linux/syslog.h
index 9def529..4b7b875 100644
--- a/include/linux/syslog.h
+++ b/include/linux/syslog.h
@@ -48,6 +48,14 @@
#define SYSLOG_FROM_PROC 1
int do_syslog(int type, char __user *buf, int count, bool from_file);
+
+#ifdef CONFIG_PRINTK
int check_syslog_permissions(int type, bool from_file);
+#else
+static inline int check_syslog_permissions(int type, bool from_file)
+{
+ return 0;
+}
+#endif
#endif /* _LINUX_SYSLOG_H */