[PATCH 1/1] io_uring/region: fix error codes after failed vmap

[Pavel Begunkov <asml.silence@xxxxxxxxx>]

io_create_region() jumps after a vmap failure without setting the return
code, it could be 0 or just uninitialised.

Fixes: dfbbfbf191878 ("io_uring: introduce concept of memory regions")
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
 io_uring/memmap.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/io_uring/memmap.c b/io_uring/memmap.c
index bbd9569a0120..6e6ee79ba94f 100644
--- a/io_uring/memmap.c
+++ b/io_uring/memmap.c
@@ -247,8 +247,10 @@ int io_create_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr,
 	}
 
 	vptr = vmap(pages, nr_pages, VM_MAP, PAGE_KERNEL);
-	if (!vptr)
+	if (!vptr) {
+		ret = -ENOMEM;
 		goto out_free;
+	}
 
 	mr->pages = pages;
 	mr->vmap_ptr = vptr;
-- 
2.46.0