From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3CE0C30FC1E; Mon, 13 Apr 2026 16:35:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776098136; cv=none; b=kQt6K1pS0tIwc17roRnDVdn7e6HZSpvHUw4tuyDMLa6Go4wU7uKxqnV3ae7qGwJrOc0usc+NoWBnqsmI9EeEBiGgKAlF7qWU3y+Hs6KAEB9JQbCwHrXc7qNTACBMBoiqiKCr3TlmekKHU9BIPPSWk/UnH6YR1W96pcEG5mOYq9o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776098136; c=relaxed/simple; bh=u1hNqV31fBoZdonY/ex9JpX2ncFxpMLG+xRWS+EcJhc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fxcY9NelkWM63AD2eo8mC4lQCFUpDhywUDzpIo1HiASW3kmvo+PgkJI2wpFLKbRxD1sJErlImNBp4A4XiaUZ49oNh+szS+806gV75fCHuhF87MR7T2iDp+cz0X+WdijJeuqgnI0Yktc4m6c+qxjse8tVChv84sjbGIPr9I4Z7WE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Luz+r0aa; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Luz+r0aa" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3A736C2BCB3; Mon, 13 Apr 2026 16:35:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1776098135; bh=u1hNqV31fBoZdonY/ex9JpX2ncFxpMLG+xRWS+EcJhc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Luz+r0aaLsKs/ddVfXxEc6qUJ4E18afSqQtx/MdYX+NITtLCGTLvKbVt2IfzJKnhl 8nKzg9eqeDKOX1E/3Motr70DxEnrnufBOplpCwBedXx9gmc/q4YAU2FTZkn77vYqfr ng5XnXJkhgDq8sFYJ8PdKJD5ViIsYNmBKAwUg9CI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zhan Xusheng , Thomas Gleixner Subject: [PATCH 5.15 375/570] alarmtimer: Fix argument order in alarm_timer_forward() Date: Mon, 13 Apr 2026 17:58:26 +0200 Message-ID: <20260413155844.526849900@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260413155830.386096114@linuxfoundation.org> References: <20260413155830.386096114@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zhan Xusheng commit 5d16467ae56343b9205caedf85e3a131e0914ad8 upstream. alarm_timer_forward() passes arguments to alarm_forward() in the wrong order: alarm_forward(alarm, timr->it_interval, now); However, alarm_forward() is defined as: u64 alarm_forward(struct alarm *alarm, ktime_t now, ktime_t interval); and uses the second argument as the current time: delta = ktime_sub(now, alarm->node.expires); Passing the interval as "now" results in incorrect delta computation, which can lead to missed expirations or incorrect overrun accounting. This issue has been present since the introduction of alarm_timer_forward(). Fix this by swapping the arguments. Fixes: e7561f1633ac ("alarmtimer: Implement forward callback") Signed-off-by: Zhan Xusheng Signed-off-by: Thomas Gleixner Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260323061130.29991-1-zhanxusheng@xiaomi.com Signed-off-by: Greg Kroah-Hartman --- kernel/time/alarmtimer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -609,7 +609,7 @@ static s64 alarm_timer_forward(struct k_ { struct alarm *alarm = &timr->it.alarm.alarmtimer; - return alarm_forward(alarm, timr->it_interval, now); + return alarm_forward(alarm, now, timr->it_interval); } /**