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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 To: Mostafa Saleh 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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260526151934.3783707-2-smostafa@google.com> X-Rspamd-Action: no action X-Spamd-Result: default: False [-4.00 / 15.00]; BAYES_HAM(-3.00)[99.99%]; DMARC_POLICY_ALLOW(-0.50)[google.com,reject]; R_DKIM_ALLOW(-0.20)[google.com:s=20251104]; R_SPF_ALLOW(-0.20)[+ip4:209.85.128.0/17]; MIME_GOOD(-0.10)[text/plain]; RCPT_COUNT_TWELVE(0.00)[14]; TO_DN_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ASN(0.00)[asn:15169, ipnet:209.85.128.0/17, country:US]; RWL_MAILSPIKE_POSSIBLE(0.00)[209.85.128.44:from]; MIME_TRACE(0.00)[0:+]; MISSING_XM_UA(0.00)[]; ARC_NA(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; NEURAL_HAM(-0.00)[-0.999]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; DWL_DNSWL_NONE(0.00)[google.com:dkim]; TO_MATCH_ENVRCPT_SOME(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[op-tee@lists.trustedfirmware.org]; DNSWL_BLOCKED(0.00)[209.85.128.44:from]; RCVD_TLS_LAST(0.00)[]; DKIM_TRACE(0.00)[google.com:+] X-Rspamd-Server: lists.trustedfirmware.org X-Rspamd-Queue-Id: 4617644B02 X-Spamd-Bar: --- Message-ID-Hash: ANQSVE7DJDDYPE6B6ZWCD3UMBDZI7RZP X-Message-ID-Hash: ANQSVE7DJDDYPE6B6ZWCD3UMBDZI7RZP X-MailFrom: sebastianene@google.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-op-tee.lists.trustedfirmware.org-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header 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, sumit.garg@kernel.org, vdonnefort@google.com, sudeep.holla@kernel.org X-Mailman-Version: 3.3.5 Precedence: list List-Id: Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Sebastian Ene via OP-TEE Reply-To: Sebastian Ene 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