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 C5AD211C9B; Thu, 30 Nov 2023 16:33:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="l7rIMbMe" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 55457C433C7; Thu, 30 Nov 2023 16:33:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1701362001; bh=1hGrS0IcwTHmLh6ahiLYWKHeNRHSQBAKOryQgVQfAcw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=l7rIMbMe1QYeWjh2q/n38w+jzBmGIUXMGofPmC2lV1oewiLJUvAot2XYRU7Z4JfeJ Fv2bHi0RrOIHg3z9D9xwrSXojXKUGnPuBd1fGY4wqwtdLiRcJz3S1HAjQkCBi7H2Hp 7qXCkXSR0TT0ZztAQJzpoqd6FXM5t7rEFZyWWxSo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Bhanu Victor DiCara <00bvd0+linux@gmail.com>, Song Liu , Xiao Ni , Yu Kuai , Guoqing Jiang Subject: [PATCH 5.15 47/69] md: fix bi_status reporting in md_end_clone_io Date: Thu, 30 Nov 2023 16:22:44 +0000 Message-ID: <20231130162134.613736887@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231130162133.035359406@linuxfoundation.org> References: <20231130162133.035359406@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org 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: Song Liu commit 45b478951b2ba5aea70b2850c49c1aa83aedd0d2 upstream. md_end_clone_io() may overwrite error status in orig_bio->bi_status with BLK_STS_OK. This could happen when orig_bio has BIO_CHAIN (split by md_submit_bio => bio_split_to_limits, for example). As a result, upper layer may miss error reported from md (or the device) and consider the failed IO was successful. Fix this by only update orig_bio->bi_status when current bio reports error and orig_bio is BLK_STS_OK. This is the same behavior as __bio_chain_endio(). Fixes: 10764815ff47 ("md: add io accounting for raid0 and raid5") Cc: stable@vger.kernel.org # v5.14+ Reported-by: Bhanu Victor DiCara <00bvd0+linux@gmail.com> Closes: https://lore.kernel.org/regressions/5727380.DvuYhMxLoT@bvd0/ Signed-off-by: Song Liu Tested-by: Xiao Ni Reviewed-by: Yu Kuai Acked-by: Guoqing Jiang Signed-off-by: Greg Kroah-Hartman --- drivers/md/md.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -8627,7 +8627,8 @@ static void md_end_io_acct(struct bio *b struct md_io_acct *md_io_acct = bio->bi_private; struct bio *orig_bio = md_io_acct->orig_bio; - orig_bio->bi_status = bio->bi_status; + if (bio->bi_status && !orig_bio->bi_status) + orig_bio->bi_status = bio->bi_status; bio_end_io_acct(orig_bio, md_io_acct->start_time); bio_put(bio);