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Fri, 02 Oct 2026 12:15:22 -0700 (PDT) From: Muhammad Bilal To: Jorge Lopez , Hans de Goede , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Cc: Andy Shevchenko , =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= , platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, Muhammad Bilal , stable@vger.kernel.org Subject: [PATCH v4 9/9] platform/x86: hp-bioscfg: fix oops on short integer attribute buffer Date: Sat, 3 Oct 2026 00:14:34 +0500 Message-ID: <20261002191434.58529-10-meatuni001@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20261002191434.58529-1-meatuni001@gmail.com> References: <20261002191434.58529-1-meatuni001@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit hp_populate_integer_elements_from_buffer() ignores the return value of hp_get_string_from_buffer(). When fewer than 2 bytes are left in the buffer, dst_size is 0, kcalloc() returns ZERO_SIZE_PTR and hp_get_string_from_buffer() fails without writing to it, so kstrtoint() faults on address 0x10. Return the error instead. Compile tested only. Fixes: 6f2c06d5a467 ("platform/x86: hp-bioscfg: int-attributes") Cc: stable@vger.kernel.org Signed-off-by: Muhammad Bilal --- Changes in v4: - New patch drivers/platform/x86/hp/hp-bioscfg/int-attributes.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/platform/x86/hp/hp-bioscfg/int-attributes.c b/drivers/platform/x86/hp/hp-bioscfg/int-attributes.c index a27907066..14317b7fd 100644 --- a/drivers/platform/x86/hp/hp-bioscfg/int-attributes.c +++ b/drivers/platform/x86/hp/hp-bioscfg/int-attributes.c @@ -331,7 +331,12 @@ static int hp_populate_integer_elements_from_buffer(u8 *buffer_ptr, u32 *buffer_ // VALUE: integer_data->current_value = 0; - hp_get_string_from_buffer(&buffer_ptr, buffer_size, dst, dst_size); + ret = hp_get_string_from_buffer(&buffer_ptr, buffer_size, dst, dst_size); + if (ret < 0) { + kfree(dst); + return ret; + } + ret = kstrtoint(dst, 10, &integer_data->current_value); if (ret) pr_warn("Unable to convert string to integer: %s\n", dst); -- 2.43.0