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 0D9473A48C6 for ; Tue, 12 May 2026 14:02:38 +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=1778594558; cv=none; b=Z0cef8sGxDjMK0UoOggcVnXAudWm+K+YGz2sCX4SdBJTB3HMrYVS9yCclDClcwj1amFNlORKF13WNg0gNgLbANj+raitkDs/myJ7fzC+KXTNoPBv7zRpWm7kbyK8GBJQD/cRsx5e8Z9H9BcLnSGTU0Jh/EwKTveJJAZJgDY3Ph8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778594558; c=relaxed/simple; bh=Qwp1XGc4daI6mz0N1nySRDBo5ID+Ya32win6oV+edHA=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=K49kDCJ+3LaYy2xdAUF6Be4F5lvrFTm3Zcxzi0DMnf7K0uKFNsHsn6Bx0XHAjwordKEcyN4rfgH9BED2ZZVgI/qrfgF5sI3NnlafgPMgyELnIHiY1rBkEKzKbHzDwIjo3p/tN/R+iSpx57nasXI0l3F+LKnjk/GV6JQS3lqT5RA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=IHAjkznW; 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="IHAjkznW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 986FAC2BCB0; Tue, 12 May 2026 14:02:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778594557; bh=Qwp1XGc4daI6mz0N1nySRDBo5ID+Ya32win6oV+edHA=; h=Subject:To:Cc:From:Date:From; b=IHAjkznWzoZOsFgiC3G1SYfpPZKk3aAq5rt9jQWo6UU+KkPooKu/OOzdoBmeIfs+h /lkacQwY3bmd5LseaG/GA3LHAenaF0q0q1hEAKb9d2zmf6IW0czA8YHNCSQRNHts+z 6nr+CPgbj5YM0GLfBTuy9vt+4yyvVaFnjP+sKxg8= Subject: FAILED: patch "[PATCH] dm-verity-fec: fix the size of dm_verity_fec_io::erasures" failed to apply to 6.18-stable tree To: ebiggers@kernel.org,mpatocka@redhat.com Cc: From: Date: Tue, 12 May 2026 16:00:13 +0200 Message-ID: <2026051213-aging-unfitted-3eae@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.18-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.18.y git checkout FETCH_HEAD git cherry-pick -x a7fca324d7d90f7b139d4d32747c83a629fdb446 # git commit -s git send-email --to '' --in-reply-to '2026051213-aging-unfitted-3eae@gregkh' --subject-prefix 'PATCH 6.18.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From a7fca324d7d90f7b139d4d32747c83a629fdb446 Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Thu, 5 Feb 2026 20:59:23 -0800 Subject: [PATCH] dm-verity-fec: fix the size of dm_verity_fec_io::erasures 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 diff --git a/drivers/md/dm-verity-fec.h b/drivers/md/dm-verity-fec.h index 35d28d9f8a9b..32ca2bfee1db 100644 --- a/drivers/md/dm-verity-fec.h +++ b/drivers/md/dm-verity-fec.h @@ -47,7 +47,8 @@ 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 *output; /* buffer for corrected output */ unsigned int level; /* recursion level */ unsigned int nbufs; /* number of buffers allocated */