From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Viken Dadhaniya <viken.dadhaniya@oss.qualcomm.com>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Mukesh Kumar Savaliya <mukesh.savaliya@oss.qualcomm.com>
Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org
Subject: Re: [PATCH v2 2/4] soc: qcom: geni-se: Widen fw_size to u32 to prevent wrap-around
Date: Thu, 20 Aug 2026 16:40:43 +0200 [thread overview]
Message-ID: <7ded57d7-4551-4f8d-a6ad-1fb52f4a26d6@oss.qualcomm.com> (raw)
In-Reply-To: <20260820-fix-write-to-read-only-firmware-buffer-v2-2-7badcdc455fe@oss.qualcomm.com>
On 8/20/26 4:30 PM, Viken Dadhaniya wrote:
> fw_size is read from the 16-bit fw_size_in_items field and incremented
> when the count is odd. If fw_size_in_items == 0xffff the increment
> wraps to 0 as a u16, making the bounds check below pass for a firmware
> segment whose actual size was not validated. Widen fw_size to u32 so
> the increment never wraps.
>
> Fixes: d4bf06592ad6 ("soc: qcom: geni-se: Add support to load QUP SE Firmware via Linux subsystem")
> Cc: stable@vger.kernel.org
> Signed-off-by: Viken Dadhaniya <viken.dadhaniya@oss.qualcomm.com>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Konrad
next prev parent reply other threads:[~2026-08-20 14:40 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-20 14:30 [PATCH v2 0/4] Fix endian, overflow, and write-protection bugs in SE firmware loading Viken Dadhaniya
2026-08-20 14:30 ` [PATCH v2 1/4] soc: qcom: geni-se: Fix endian conversion for serial_protocol comparison Viken Dadhaniya
2026-08-20 14:40 ` Konrad Dybcio
2026-08-20 14:30 ` [PATCH v2 2/4] soc: qcom: geni-se: Widen fw_size to u32 to prevent wrap-around Viken Dadhaniya
2026-08-20 14:40 ` Konrad Dybcio [this message]
2026-08-20 14:31 ` [PATCH v2 3/4] soc: qcom: geni-se: Fix fw_end computed before round-up; propagate size to caller Viken Dadhaniya
2026-08-20 14:44 ` Konrad Dybcio
2026-08-20 14:31 ` [PATCH v2 4/4] soc: qcom: geni-se: Fix write to read-only firmware buffer Viken Dadhaniya
2026-08-20 14:47 ` Konrad Dybcio
2026-08-21 6:37 ` Viken Dadhaniya
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