[PATCH] eventfd: check ida_simple_get() return value

[Bo Liu]

As ida_simple_get() can fail, we should check the return value.

Signed-off-by: Bo Liu <liubo03@xxxxxxxxxx>
---
 fs/eventfd.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/eventfd.c b/fs/eventfd.c
index c0ffee99ad23..fde730492993 100644
--- a/fs/eventfd.c
+++ b/fs/eventfd.c
@@ -428,6 +428,8 @@ 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;
-- 
2.27.0