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io_uring/zcrx: don't leak pages on account failure

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commit 6bbd3411ff upstream.

Someone needs to release pinned pages in io_import_umem() if accounting
fails. Assign them to the area but return an error, the following
io_zcrx_free_area() will clean them up.

Fixes: 262ab20518 ("io_uring/zcrx: account area memory")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/e19f283a912f200c0d427e376cb789fc3f3d69bc.1753091564.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pavel Begunkov 2025-07-21 10:56:21 +01:00 committed by Greg Kroah-Hartman
parent e004d86dc5
commit 32830e9f24
1 changed files with 2 additions and 4 deletions
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6
io_uring/zcrx.c
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@ -187,15 +187,13 @@ static int io_import_umem(struct io_zcrx_ifq *ifq,
mem->account_pages = io_count_account_pages(pages, nr_pages);
ret = io_account_mem(ifq->ctx, mem->account_pages);
if (ret < 0) {
if (ret < 0)
mem->account_pages = 0;
return ret;
}
mem->pages = pages;
mem->nr_folios = nr_pages;
mem->size = area_reg->len;
return 0;
return ret;
}
static void io_release_area_mem(struct io_zcrx_mem *mem)