eventfd: check ida_simple_get() return value

As ida_simple_get() can fail, we should check the return value. Signed-off-by: Bo Liu <liubo03@inspur.com>
intel-lab-lkp · Sep 7, 2022 · 04c5de6 · 04c5de6
1 parent 0066f1b
commit 04c5de6
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/fs/eventfd.c b/fs/eventfd.c
@@ -424,6 +424,8 @@ static int do_eventfd(unsigned int count, int flags)
 	ctx->count = count;
 	ctx->flags = flags;
 	ctx->id = ida_simple_get(&eventfd_ida, 0, 0, GFP_KERNEL);
+	if (ctx->id < 0)
+		goto err;
 
 	flags &= EFD_SHARED_FCNTL_FLAGS;
 	flags |= O_RDWR;