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optee: smc_abi.c: fix wrong pointer passed to IS_ERR/PTR_ERR() 

In optee_smc_do_call_with_arg() there is a code path when the argument
struct for RPC is passed appended to the primary argument struct. When
the address of the RPC struct is retrieved there's an invalid check for
success. It should be 'rpc_arg' pass to IS_ERR/PTR_ERR().

Fixes: ed8faf6c8f ("optee: add OPTEE_SMC_CALL_WITH_RPC_ARG and OPTEE_SMC_CALL_WITH_REGD_ARG")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
[jw: added background to the problem]
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
This commit is contained in:
Yang Yingliang 2022-06-28 14:52:16 +08:00 committed by Jens Wiklander
parent b13baccc38
commit d4fac258d9
1 changed files with 2 additions and 2 deletions
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4
drivers/tee/optee/smc_abi.c
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@ -884,8 +884,8 @@ static int optee_smc_do_call_with_arg(struct tee_context *ctx,
rpc_arg_offs = OPTEE_MSG_GET_ARG_SIZE(arg->num_params);
rpc_arg = tee_shm_get_va(shm, offs + rpc_arg_offs);
if (IS_ERR(arg))
return PTR_ERR(arg);
if (IS_ERR(rpc_arg))
return PTR_ERR(rpc_arg);
}
if (rpc_arg && tee_shm_is_dynamic(shm)) {