linux-kernel - [029/143] mmc: sdhci-pci: Fix error case in sdhci_pci_probe

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20110506002207.993104844@clark.kroah.org>
Date:	Thu, 05 May 2011 17:20:14 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Chris Ball <cjb@...top.org>
Subject: [029/143] mmc: sdhci-pci: Fix error case in sdhci_pci_probe_slot()

2.6.32-longterm review patch.  If anyone has any objections, please let us know.

------------------

From: Chris Ball <cjb@...top.org>

commit 9fdcdbb0d84922e7ccda2f717a04ea62629f7e18 upstream.

If pci_ioremap_bar() fails during probe, we "goto release;" and free the
host, but then we return 0 -- which tells sdhci_pci_probe() that the probe
succeeded.  Since we think the probe succeeded, when we unload sdhci we'll
go to sdhci_pci_remove_slot() and it will try to dereference slot->host,
which is now NULL because we freed it in the error path earlier.

The patch simply sets ret appropriately, so that sdhci_pci_probe() will
detect the failure immediately and bail out.

Signed-off-by: Chris Ball <cjb@...top.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/mmc/host/sdhci-pci.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -569,6 +569,7 @@ static struct sdhci_pci_slot * __devinit
 	host->ioaddr = pci_ioremap_bar(pdev, bar);
 	if (!host->ioaddr) {
 		dev_err(&pdev->dev, "failed to remap registers\n");
+		ret = -ENOMEM;
 		goto release;
 	}

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/