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io_uring/zcrx: fix leaking pages on sg init fail 

If sg_alloc_table_from_pages() fails, io_import_umem() returns without
cleaning up pinned pages first. Fix it.

Fixes: b84621d96e ("io_uring/zcrx: allocate sgtable for umem areas")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/9fd94d1bc8c316611eccfec7579799182ff3fb0a.1753091564.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2025-07-21 10:56:22 +01:00 committed by Jens Axboe
parent 6bbd3411ff
commit d9f595b9a6
1 changed files with 3 additions and 1 deletions
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4
io_uring/zcrx.c
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@ -194,8 +194,10 @@ static int io_import_umem(struct io_zcrx_ifq *ifq,
ret = sg_alloc_table_from_pages(&mem->page_sg_table, pages, nr_pages,
0, nr_pages << PAGE_SHIFT,
GFP_KERNEL_ACCOUNT);
if (ret)
if (ret) {
unpin_user_pages(pages, nr_pages);
return ret;
}
mem->account_pages = io_count_account_pages(pages, nr_pages);
ret = io_account_mem(ifq->ctx, mem->account_pages);