linux-kernel - [PATCH 2/2] block: cpqarray: fix information leak to userland

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Date:	Sat, 23 Oct 2010 12:25:15 +0400
From:	Vasiliy Kulikov <segooon@...il.com>
To:	kernel-janitors@...r.kernel.org
Cc:	Chirag Kantharia <chirag.kantharia@...com>,
	Jens Axboe <jaxboe@...ionio.com>,
	Arnd Bergmann <arnd@...db.de>,
	Christoph Hellwig <hch@...radead.org>,
	Kulikov Vasiliy <segooon@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	iss_storagedev@...com, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] block: cpqarray: fix information leak to userland

Structure ida_pci_info_struct is copied to userland with some padding
fields unitialized.  It leads to leaking of stack memory.

Signed-off-by: Vasiliy Kulikov <segooon@...il.com>
---
 drivers/block/cpqarray.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c
index 946dad4..8e0e6b4 100644
--- a/drivers/block/cpqarray.c
+++ b/drivers/block/cpqarray.c
@@ -1198,6 +1198,7 @@ out_passthru:
 		ida_pci_info_struct pciinfo;
 
 		if (!arg) return -EINVAL;
+		memset(&pciinfo, 0, sizeof(pciinfo));
 		pciinfo.bus = host->pci_dev->bus->number;
 		pciinfo.dev_fn = host->pci_dev->devfn;
 		pciinfo.board_id = host->board_id;
-- 
1.7.0.4

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