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 807A834F490; Tue, 26 Aug 2025 13:54:49 +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=1756216489; cv=none; b=GzCZnRva4tQOTEnVIksE40gOwlCJYv0mkrU4i6NmfnhMTiI+eyBADC6voy/oezgNH790+2FbXppUJlxJsb2AG/rhMJKra0hCChO4Lni9lSQKH+xVnZyC6XZ60Zp1NCnCFo6jqAYVWU7CvuN5YVtN3PXr1ic2R9/f+dQgKSivJEA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756216489; c=relaxed/simple; bh=31JjWiXApxeT8Ruom2D+Wbc4fyvdxvfP6OSopGp/oCw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=bDmLUWndQ+s3p3fe/oXHxLud1j7JJAOIcJ0GP/1v4OGbvKYIQYOVvk6VIueR4obxnc7SBJd4xXn3KJzFjMXzkSBHo+AAysElEouyvO8BD+PrCoha88h6isDNISbh+H2aW53IC4GFuQn0APeM1vUYYbmME8SIpVNHEj0ODvODvsY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ZXRdShpz; 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="ZXRdShpz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CA766C4CEF1; Tue, 26 Aug 2025 13:54:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756216489; bh=31JjWiXApxeT8Ruom2D+Wbc4fyvdxvfP6OSopGp/oCw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZXRdShpz3YXxP5LjroRfO5JsxCGAjNTNZrdPyYobOpI3c7KEBRPAcjWnFBbaVZ7BV UXuNLWyI1PSiDkh2NByGoWjvKrrb+UEmLKiDUzGX2r3ekV4yMVztjWCprzYp6gsGmS bSxdHSz4vFDyZI2/e7wvfyk7RCJqjpeyDjwjtrWg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hannes Reinecke , "Martin K. Petersen" , John Garry , Damien Le Moal , Jens Axboe , Sasha Levin Subject: [PATCH 5.15 429/644] block: avoid possible overflow for chunk_sectors check in blk_stack_limits() Date: Tue, 26 Aug 2025 13:08:40 +0200 Message-ID: <20250826110957.093886551@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110946.507083938@linuxfoundation.org> References: <20250826110946.507083938@linuxfoundation.org> User-Agent: quilt/0.68 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: John Garry [ Upstream commit 448dfecc7ff807822ecd47a5c052acedca7d09e8 ] In blk_stack_limits(), we check that the t->chunk_sectors value is a multiple of the t->physical_block_size value. However, by finding the chunk_sectors value in bytes, we may overflow the unsigned int which holds chunk_sectors, so change the check to be based on sectors. Reviewed-by: Hannes Reinecke Reviewed-by: Martin K. Petersen Signed-off-by: John Garry Reviewed-by: Damien Le Moal Link: https://lore.kernel.org/r/20250729091448.1691334-2-john.g.garry@oracle.com Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- block/blk-settings.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/blk-settings.c b/block/blk-settings.c index 1b92e6624951..d501084bab4a 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -596,7 +596,7 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, } /* chunk_sectors a multiple of the physical block size? */ - if ((t->chunk_sectors << 9) & (t->physical_block_size - 1)) { + if (t->chunk_sectors % (t->physical_block_size >> SECTOR_SHIFT)) { t->chunk_sectors = 0; t->misaligned = 1; ret = -1; -- 2.39.5