From: Jens Axboe axboe@kernel.dk
[ Upstream commit a30f895ad3239f45012e860d4f94c1a388b36d14 ]
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@vger.kernel.org Fixes: 61cf93700fe6 ("io_uring: Convert personality_idr to XArray") Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- fs/io_uring.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c index 221b80ae831f..9df82eee440a 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -9835,10 +9835,11 @@ 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) - return id; - put_cred(creds); - return ret; + if (ret < 0) { + put_cred(creds); + return ret; + } + return id; }
static int io_register_restrictions(struct io_ring_ctx *ctx, void __user *arg,