From: Mostafa Saleh <smostafa@google.com>
To: op-tee@lists.trustedfirmware.org, linux-kernel@vger.kernel.org,
kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org
Cc: 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,
sebastianene@google.com, vdonnefort@google.com,
sudeep.holla@kernel.org, Mostafa Saleh <smostafa@google.com>
Subject: [PATCH v6 1/6] optee: ffa: Add NULL check in optee_ffa_lend_protmem
Date: Wed, 27 May 2026 15:02:31 +0000 [thread overview]
Message-ID: <20260527150236.1978655-2-smostafa@google.com> (raw)
In-Reply-To: <20260527150236.1978655-1-smostafa@google.com>
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.
Fixes: 2b78d79cdf96 ("optee: FF-A: dynamic protected memory allocation")
Signed-off-by: Mostafa Saleh <smostafa@google.com>
---
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
next prev parent reply other threads:[~2026-05-27 15:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-27 15:02 [PATCH v6 0/6] arm_ffa, KVM: Fix FF-A emad offset calculations Mostafa Saleh
2026-05-27 15:02 ` Mostafa Saleh [this message]
2026-05-27 15:02 ` [PATCH v6 2/6] firmware: arm_ffa: Fix out-of-bound writes in ffa_setup_and_transmit() Mostafa Saleh
2026-05-27 15:02 ` [PATCH v6 3/6] firmware: arm_ffa: Fix Endpoint Memory Access Descriptor offset calculation Mostafa Saleh
2026-05-27 15:02 ` [PATCH v6 4/6] KVM: arm64: Fix bounds checking in do_ffa_mem_reclaim() Mostafa Saleh
2026-05-27 15:02 ` [PATCH v6 5/6] KVM: arm64: Validate the offset to the mem access descriptor Mostafa Saleh
2026-05-27 15:02 ` [PATCH v6 6/6] KVM: arm64: Ensure FFA ranges are page aligned Mostafa Saleh
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