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[104.199.71.220]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-490bc4082c3sm144221845e9.13.2026.06.05.05.01.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Jun 2026 05:01:30 -0700 (PDT) Date: Fri, 5 Jun 2026 12:01:26 +0000 From: Sebastian Ene To: Mostafa Saleh Cc: op-tee@lists.trustedfirmware.org, linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, maz@kernel.org, oupton@kernel.org, joey.gouly@arm.com, suzuki.poulose@arm.com, catalin.marinas@arm.com, jens.wiklander@linaro.org, sumit.garg@kernel.org, vdonnefort@google.com, sudeep.holla@kernel.org Subject: Re: [PATCH v5 1/6] optee: ffa: Add NULL check in optee_ffa_lend_protmem Message-ID: References: <20260526151934.3783707-1-smostafa@google.com> <20260526151934.3783707-2-smostafa@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260526151934.3783707-2-smostafa@google.com> On Tue, May 26, 2026 at 03:19:29PM +0000, Mostafa Saleh wrote: > Sashiko (locally) reports a possible null dereference under memory > pressure due to the lack of validation of the allocated pointer. > > Fix that by adding the missing check. > > Signed-off-by: Mostafa Saleh > --- > drivers/tee/optee/ffa_abi.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/tee/optee/ffa_abi.c b/drivers/tee/optee/ffa_abi.c > index b4372fa268d0..633715b98625 100644 > --- a/drivers/tee/optee/ffa_abi.c > +++ b/drivers/tee/optee/ffa_abi.c > @@ -698,6 +698,9 @@ static int optee_ffa_lend_protmem(struct optee *optee, struct tee_shm *protmem, > int rc; > > mem_attr = kzalloc_objs(*mem_attr, ma_count); > + if (!mem_attr) > + return -ENOMEM; > + > for (n = 0; n < ma_count; n++) { > mem_attr[n].receiver = mem_attrs[n] & U16_MAX; > mem_attr[n].attrs = mem_attrs[n] >> 16; > -- > 2.54.0.746.g67dd491aae-goog > Thanks for fixing this and for including my other patches in the series Reviewed-by: Sebastian Ene Sebastian