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From: Muhammad Bilal <meatuni001@gmail.com>
To: "Jorge Lopez" <jorge.lopez2@hp.com>,
	"Hans de Goede" <hansg@kernel.org>,
	"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>
Cc: "Thomas Weißschuh" <linux@weissschuh.net>,
	platform-driver-x86@vger.kernel.org,
	linux-kernel@vger.kernel.org, stable@vger.kernel.org,
	"Muhammad Bilal" <meatuni001@gmail.com>
Subject: [PATCH v3] platform/x86: hp-bioscfg: remove dead bounds check in audit_log_entries_show
Date: Sat, 19 Sep 2026 11:11:08 +0500	[thread overview]
Message-ID: <20260919061108.87240-1-meatuni001@gmail.com> (raw)

audit_log_entries_show() checks "count * LOG_ENTRY_SIZE > PAGE_SIZE"
prior to entering the loop. Because "count" is already bounded to fit
within PAGE_SIZE, the inner loop check "(LOG_ENTRY_SIZE * i) > PAGE_SIZE"
can never be reached and is dead code.

Remove the redundant inner bounds check and eliminate the unnecessary
"else" block after "break" to clean up the loop control flow.

Signed-off-by: Muhammad Bilal <meatuni001@gmail.com>
---
Resending v3 2/2 unchanged: the previous attempt reached the list with
a corrupted hunk (header/diffstat didn't match the body), which is
what "patch: **** malformed patch at line 65" was. No content change
from the previous v3, this is a clean re-generation of the same diff.

Changes in v3:
  - Remove the dead inner loop check completely instead of adjusting
    the boundary arithmetic, as noted by Ilpo Järvinen.
  - Remove the redundant else block after break.

Changes in v2:
  - None for this patch; resubmitted as part of the v2 series.

Link: https://lore.kernel.org/r/20260803143037.93105-1-meatuni001@gmail.com [v1]
Link: https://lore.kernel.org/r/20260812111829.172273-1-meatuni001@gmail.com [v2]
---
 .../x86/hp/hp-bioscfg/surestart-attributes.c   | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/drivers/platform/x86/hp/hp-bioscfg/surestart-attributes.c b/drivers/platform/x86/hp/hp-bioscfg/surestart-attributes.c
index b57e42f..d689ee8 100644
--- a/drivers/platform/x86/hp/hp-bioscfg/surestart-attributes.c
+++ b/drivers/platform/x86/hp/hp-bioscfg/surestart-attributes.c
@@ -90,17 +90,15 @@ static ssize_t audit_log_entries_show(struct kobject *kobj,
 					   HPWMI_SURESTART,
 					   audit_log_buffer, 1, 128);
 
-		if (ret < 0 || (LOG_ENTRY_SIZE * i) > PAGE_SIZE) {
-			/*
-			 * Encountered a failure while reading
-			 * individual logs. Only a partial list of
-			 * audit log will be returned.
-			 */
+		/*
+		 * Encountered a failure while reading individual logs.
+		 * Only a partial list of audit log will be returned.
+		 */
+		if (ret < 0)
 			break;
-		} else {
-			memcpy(buf, audit_log_buffer, LOG_ENTRY_SIZE);
-			buf += LOG_ENTRY_SIZE;
-		}
+
+		memcpy(buf, audit_log_buffer, LOG_ENTRY_SIZE);
+		buf += LOG_ENTRY_SIZE;
 	}
 
 	return i * LOG_ENTRY_SIZE;
-- 
2.43.0


                 reply	other threads:[~2026-09-19  6:11 UTC|newest]

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