Don't allow normal users to set idle IO priority

It has all the normal priority inversion problems. Signed-off-by: Linus Torvalds <[email protected]>
wafgo · Aug 21, 2005 · f6fdd7d · f6fdd7d
1 parent 7e71af4
commit f6fdd7d
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/fs/ioprio.c b/fs/ioprio.c
@@ -62,6 +62,8 @@ asmlinkage long sys_ioprio_set(int which, int who, int ioprio)
 
 			break;
 		case IOPRIO_CLASS_IDLE:
+			if (!capable(CAP_SYS_ADMIN))
+				return -EPERM;
 			break;
 		default:
 			return -EINVAL;