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From: Pavel Begunkov <asml.silence@gmail.com>
To: io-uring@vger.kernel.org
Cc: asml.silence@gmail.com, axboe@kernel.dk, netdev@vger.kernel.org
Subject: [PATCH 1/1] io_uring/zcrx: check unsupported flags on import
Date: Sun, 15 Feb 2026 21:29:12 +0000	[thread overview]
Message-ID: <0e2e7c6211f2b40fb830f69f1084f0a3948bf2ee.1771190842.git.asml.silence@gmail.com> (raw)

The imoorted zcrx registration path checks for ZCRX_REG_IMPORT, as it
should, but doesn't reject any unsupported flags. Fix that.

Cc: stable@vger.kernel.org
Fixes: 00d91481279fb ("io_uring/zcrx: share an ifq between rings")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 io_uring/zcrx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/io_uring/zcrx.c b/io_uring/zcrx.c
index 29ca1d897be9..13646d09885c 100644
--- a/io_uring/zcrx.c
+++ b/io_uring/zcrx.c
@@ -702,6 +702,8 @@ static int import_zcrx(struct io_ring_ctx *ctx,
 		return -EINVAL;
 	if (reg->if_rxq || reg->rq_entries || reg->area_ptr || reg->region_ptr)
 		return -EINVAL;
+	if (reg->flags & ~ZCRX_REG_IMPORT)
+		return -EINVAL;
 
 	fd = reg->if_idx;
 	CLASS(fd, f)(fd);
-- 
2.52.0


             reply	other threads:[~2026-02-15 21:29 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-15 21:29 Pavel Begunkov [this message]
2026-02-15 22:13 ` [PATCH 1/1] io_uring/zcrx: check unsupported flags on import Jens Axboe

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