linux-kernel - [PATCH] io_uring: Fix uninitialized use of ret in io_eventfd

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Message-Id: <20220209102637.34088-1-jiapeng.chong@linux.alibaba.com>
Date:   Wed,  9 Feb 2022 18:26:37 +0800
From:   Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
To:     axboe@...nel.dk
Cc:     asml.silence@...il.com, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>,
        Abaci Robot <abaci@...ux.alibaba.com>
Subject: [PATCH] io_uring: Fix uninitialized use of ret in io_eventfd_register()

In some scenarios, ret is not assigned in the whole process, so it
needs to be initialized at the beginning.

Clean up the following clang warning:

fs/io_uring.c:9373:13: note: initialize the variable 'ret' to silence
this warning.

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
---
 fs/io_uring.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 5479f0607430..7f277890f1ec 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -9370,7 +9370,7 @@ static int io_eventfd_register(struct io_ring_ctx *ctx, void __user *arg,
 {
 	struct io_ev_fd *ev_fd;
 	__s32 __user *fds = arg;
-	int fd, ret;
+	int fd, ret = 0;
 
 	ev_fd = rcu_dereference_protected(ctx->io_ev_fd,
 					lockdep_is_held(&ctx->uring_lock));
-- 
2.20.1.7.g153144c