linux-kernel - [PATCH] io_uring/rsrc: remove unnecessary check on resv2

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Message-ID: <CADPKJ-7cb9fcPbP3gDNauc22nSbqmddhYzmKeVSiLpkc_u88KA@mail.gmail.com>
Date: Tue, 23 Sep 2025 16:41:11 +0800
From: clingfei <clf700383@...il.com>
To: axboe@...nel.dk
Cc: io-uring@...r.kernel.org, linux-kernel@...r.kernel.org, 
	clingfei <clf700383@...il.com>
Subject: [PATCH] io_uring/rsrc: remove unnecessary check on resv2

>From b52509776e0f7f9ea703d0551ccaeeaa49ab6440 Mon Sep 17 00:00:00 2001
From: clingfei <clf700383@...il.com>
Date: Tue, 23 Sep 2025 16:30:30 +0800
Subject: [PATCH] io_uring/rsrc: remove unnecessary check on resv2

The memset sets the up.resv2 to be 0,
and the copy_from_user does not touch it,
thus up.resv2 will always be false.

Signed-off-by: clingfei <clf700383@...il.com>
---
 io_uring/rsrc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index f75f5e43fa4a..7006b3ca5404 100644
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -372,7 +372,7 @@ int io_register_files_update(struct io_ring_ctx
*ctx, void __user *arg,
    memset(&up, 0, sizeof(up));
    if (copy_from_user(&up, arg, sizeof(struct io_uring_rsrc_update)))
        return -EFAULT;
-   if (up.resv || up.resv2)
+   if (up.resv)
        return -EINVAL;
    return __io_register_rsrc_update(ctx, IORING_RSRC_FILE, &up, nr_args);
 }
-- 
2.34.1