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io_uring/zcrx: check unsupported flags on import

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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: 00d9148127 ("io_uring/zcrx: share an ifq between rings")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2026-02-15 21:29:12 +00:00 • committed by Jens Axboe
parent 5d540e4508
commit 7496e658a7
1 changed files with 2 additions and 0 deletions
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2
io_uring/zcrx.c
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@ -677,6 +677,8 @@ 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);