[PATCH] io_uring: fix xa_alloc_cycle() error return value check

[Jens Axboe <axboe@xxxxxxxxx>]

We currently check for ret != 0 to indicate error, but '1' is a valid
return and just indicates that the allocation succeeded with a wrap.
Correct the check to be for < 0, like it was before the xarray
conversion.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: 61cf93700fe6 ("io_uring: Convert personality_idr to XArray")
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>

---

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 979941bcd15a..60851908ed6f 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -9843,7 +9843,7 @@ static int io_register_personality(struct io_ring_ctx *ctx)
 
 	ret = xa_alloc_cyclic(&ctx->personalities, &id, (void *)creds,
 			XA_LIMIT(0, USHRT_MAX), &ctx->pers_next, GFP_KERNEL);
-	if (!ret)
+	if (ret < 0)
 		return id;
 	put_cred(creds);
 	return ret;

-- 
Jens Axboe