[PATCH io_uring-7.1 15/16] io_uring/zcrx: check ctrl op payload struct sizes
From: Pavel Begunkov <asml.silence@gmail.com>
Date: 2026-03-23 12:44:21
Also in:
io-uring
Subsystem:
io_uring, io_uring zcrx, the rest · Maintainers:
Jens Axboe, Pavel Begunkov, Linus Torvalds
Add a build check that ctrl payloads are of the same size and don't grow struct zcrx_ctrl. 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 d6475f95b815..620482cdb083 100644
--- a/io_uring/zcrx.c
+++ b/io_uring/zcrx.c@@ -1251,6 +1251,8 @@ int io_zcrx_ctrl(struct io_ring_ctx *ctx, void __user *arg, unsigned nr_args) struct zcrx_ctrl ctrl; struct io_zcrx_ifq *zcrx; + BUILD_BUG_ON(sizeof(ctrl.zc_export) != sizeof(ctrl.zc_flush)); + if (nr_args) return -EINVAL; if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
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2.53.0