From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 88ACF31326F; Wed, 29 Jul 2026 05:21:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785302503; cv=none; b=mbEQmsFn3HIs+AY5PQgMy4qgT/aoXtvLYmvOxc2rN2qGXxGYye+APl0nTlYkZyFrNWvvt7tRKxAIRLXuDpePxbFoGIKtcHhUjxbiESj8JC/P+g2ozgADMFh8XY3gomB4fQS3SZwEhNa/rzqC9UZhs0EOzcEQEj6XqfAYmgD8wo0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785302503; c=relaxed/simple; bh=Y2/1SvhbCn4Z2DO5JqKA8o7VYxi4VzVwua96y+H9SSo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Pb/8/+XZnyM45BTWTdTfO2ol+Oa4j3Ni6nr2ASnSXKPfqWqVvUJg9vevHdtGTgnB3yyaEbQz51hMpHDmZhxI1DYdTGIKxdMt6ciSMgRnMRrUoowSZDmnRoNHqmTdy3ZCQWSvnd+7+9Rj9NtrCUvzhjM4k7c1VeWR9Em81RrogOM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OFIXX39U; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="OFIXX39U" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 425811F00A3D; Wed, 29 Jul 2026 05:21:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785302502; bh=vFA2ctGShjkd2EkQRFAccBU+PiBQO3If8BuRTz4gMik=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=OFIXX39U1eIcYx6KeA71pX+WAm2IBy59HPJjLIQd1CNqtzHmL7Nh6lqsS1ZhBi5RI c0yA7WbSzp6SGF6fTdFfRNFGNmac9YjsnLO4nQbx6+qpsb9akZNpGQDBPUskVHPx0Z QhSnPRmeZF7h+uJ1y0C7QrncuSN7bV5s234U1SDhqcH4HUwUGGmbb4X+GzUf3zG97c 1FfiZ2kBJrh1kuxumL51/rrr2VSjSKwmh8f77xRE30zZrU+U/9DEg2KfvAc9EL7Asx D7iG5C0dSBIADHFjVwam9CwiuXtgmR6bXCGpX3GIiVoRaES7YasNna6nJtCdExcG+V NOFNORmpj+2dQ== From: Eric Biggers To: stable@vger.kernel.org Cc: dm-devel@lists.linux.dev, Mikulas Patocka , Eric Biggers Subject: [PATCH 6.18 1/4] dm-verity-fec: fix the size of dm_verity_fec_io::erasures Date: Tue, 28 Jul 2026 22:19:06 -0700 Message-ID: <20260729051909.62106-2-ebiggers@kernel.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260729051909.62106-1-ebiggers@kernel.org> References: <20260729051909.62106-1-ebiggers@kernel.org> Precedence: bulk X-Mailing-List: dm-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit commit a7fca324d7d90f7b139d4d32747c83a629fdb446 upstream. At most 25 entries in dm_verity_fec_io::erasures are used: the maximum number of FEC roots plus one. Therefore, set the array size accordingly. This reduces the size of dm_verity_fec_io by 912 bytes. Note: a later commit introduces a constant DM_VERITY_FEC_MAX_ROOTS, which allows the size to be more clearly expressed as DM_VERITY_FEC_MAX_ROOTS + 1. This commit just fixes the size first. Fixes: a739ff3f543a ("dm verity: add support for forward error correction") Cc: stable@vger.kernel.org Signed-off-by: Eric Biggers Signed-off-by: Mikulas Patocka --- drivers/md/dm-verity-fec.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/md/dm-verity-fec.h b/drivers/md/dm-verity-fec.h index ec37e607cb3f0..90a0af3f35d31 100644 --- a/drivers/md/dm-verity-fec.h +++ b/drivers/md/dm-verity-fec.h @@ -50,7 +50,8 @@ struct dm_verity_fec { /* per-bio data */ struct dm_verity_fec_io { struct rs_control *rs; /* Reed-Solomon state */ - int erasures[DM_VERITY_FEC_MAX_RSN]; /* erasures for decode_rs8 */ + /* erasures for decode_rs8 */ + int erasures[DM_VERITY_FEC_RSM - DM_VERITY_FEC_MIN_RSN + 1]; u8 *bufs[DM_VERITY_FEC_BUF_MAX]; /* bufs for deinterleaving */ unsigned int nbufs; /* number of buffers allocated */ u8 *output; /* buffer for corrected output */ -- 2.55.0