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io_uring: don't free never created regions 

io_free_region() tolerates empty regions but there is no reason to that
either. If the first io_create_region() in io_register_resize_rings()
fails, just return the error without attempting to clean it up.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
pull/1354/merge
Pavel Begunkov 2025-10-16 14:23:21 +01:00 committed by Jens Axboe
parent 0c89dbbcad
commit 6e9752977c
1 changed files with 2 additions and 3 deletions
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5
io_uring/register.c
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@ -432,10 +432,9 @@ static int io_register_resize_rings(struct io_ring_ctx *ctx, void __user *arg)
rd.flags |= IORING_MEM_REGION_TYPE_USER; rd.flags |= IORING_MEM_REGION_TYPE_USER;
} }
ret = io_create_region(ctx, &n.ring_region, &rd, IORING_OFF_CQ_RING); ret = io_create_region(ctx, &n.ring_region, &rd, IORING_OFF_CQ_RING);
if (ret) { if (ret)
io_register_free_rings(ctx, &n);
return ret; return ret;
}
n.rings = io_region_get_ptr(&n.ring_region); n.rings = io_region_get_ptr(&n.ring_region);
/* /*