Merge branch 'master' into next

[cascardo/linux.git] / kernel / printk.c

diff --git a/kernel/printk.c b/kernel/printk.c
index 4642a5c..f64b899 100644 (file)
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -273,12 +273,12 @@ int do_syslog(int type, char __user *buf, int len, bool from_file)
         * at open time.
         */
        if (type == SYSLOG_ACTION_OPEN || !from_file) {
-               if (dmesg_restrict && !capable(CAP_SYS_ADMIN))
-                       return -EPERM;
+               if (dmesg_restrict && !capable(CAP_SYSLOG))
+                       goto warn; /* switch to return -EPERM after 2.6.39 */
                if ((type != SYSLOG_ACTION_READ_ALL &&
                     type != SYSLOG_ACTION_SIZE_BUFFER) &&
-                   !capable(CAP_SYS_ADMIN))
-                       return -EPERM;
+                   !capable(CAP_SYSLOG))
+                       goto warn; /* switch to return -EPERM after 2.6.39 */
        }
 
        error = security_syslog(type);
@@ -422,6 +422,12 @@ int do_syslog(int type, char __user *buf, int len, bool from_file)
        }
 out:
        return error;
+warn:
+       /* remove after 2.6.39 */
+       if (capable(CAP_SYS_ADMIN))
+               WARN_ONCE(1, "Attempt to access syslog with CAP_SYS_ADMIN "
+                 "but no CAP_SYSLOG (deprecated and denied).\n");
+       return -EPERM;
 }
 
 SYSCALL_DEFINE3(syslog, int, type, char __user *, buf, int, len)