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Wed, 30 Sep 2026 11:31:45 -0700 (PDT) From: Muhammad Bilal To: jorge.lopez2@hp.com, hansg@kernel.org, ilpo.jarvinen@linux.intel.com Cc: andy.shevchenko@gmail.com, platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Muhammad Bilal Subject: [PATCH v3 3/3] platform/x86: hp-bioscfg: return -E2BIG from validate_password_input() Date: Wed, 30 Sep 2026 23:30:18 +0500 Message-ID: <20260930183018.49629-4-meatuni001@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930183018.49629-1-meatuni001@gmail.com> References: <20260930183018.49629-1-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 validate_password_input() returns the positive INVALID_BIOS_AUTH on rejection. store_password_instance() skips the store on nonzero ret, but its final "return ret < 0 ? ret : count" treats the positive value as success, so userspace sees count instead of an error. Return -E2BIG for an invalid password length. Tested on HP EliteBook 840 G2 (Fedora 44, Linux 7.2.7): writing 999 bytes to current_password returned 999 before this change. Fixes: 8646a3b5ee3a ("platform/x86: hp-bioscfg: passwdobj-attributes") Cc: stable@vger.kernel.org Signed-off-by: Muhammad Bilal --- Changes in v3: - Return -E2BIG instead of -ERANGE (Andy) Changes in v2: - New patch drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c b/drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c index a9e1786..3f4c45d 100644 --- a/drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c +++ b/drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c @@ -70,12 +70,13 @@ static int validate_password_input(int instance_id, const char *buf) length--; if (length > MAX_PASSWD_SIZE) - return INVALID_BIOS_AUTH; + return -E2BIG; if (password_data->min_password_length > length || password_data->max_password_length < length) - return INVALID_BIOS_AUTH; - return SUCCESS; + return -E2BIG; + + return 0; } ATTRIBUTE_N_PROPERTY_SHOW(is_enabled, password); -- 2.43.0