From: Jens Axboe axboe@kernel.dk
stable inclusion from stable-5.10.61 commit 695ab28a7fa107d0350ab19eba8ec89fac45a95d bugzilla: 177029 https://gitee.com/openeuler/kernel/issues/I4EAXD
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ 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: Pavel Begunkov asml.silence@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Chen Jun chenjun102@huawei.com --- fs/io_uring.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c index ed641dca7957..762eae2440b5 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -9601,11 +9601,12 @@ static int io_register_personality(struct io_ring_ctx *ctx)
ret = xa_alloc_cyclic(&ctx->personalities, &id, (void *)iod, XA_LIMIT(0, USHRT_MAX), &ctx->pers_next, GFP_KERNEL); - if (!ret) - return id; - put_cred(iod->creds); - kfree(iod); - return ret; + if (ret < 0) { + put_cred(iod->creds); + kfree(iod); + return ret; + } + return id; }
static int io_register_restrictions(struct io_ring_ctx *ctx, void __user *arg,