linux-kernel - [PATCH] mmc: fix to refer NULL pointer

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-next>] [day] [month] [year] [list]

Message-id: <1359177589-13868-1-git-send-email-jy0922.shim@samsung.com>
Date:	Sat, 26 Jan 2013 14:19:49 +0900
From:	Joonyoung Shim <jy0922.shim@...sung.com>
To:	cjb@...top.org
Cc:	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] mmc: fix to refer NULL pointer

Check whether host->sdio_irq_thread is NULL before wake_up_process() is
called about host->sdio_irq_thread.

Signed-off-by: Joonyoung Shim <jy0922.shim@...sung.com>
---
Currently the kernel panic to refer NULL pointer about
host->sdio_irq_thread are occuring at the trats board using Samsung
SDHCI driver.

 include/linux/mmc/host.h |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 61a10c1..2950fea 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -372,7 +372,8 @@ static inline void mmc_signal_sdio_irq(struct mmc_host *host)
 {
 	host->ops->enable_sdio_irq(host, 0);
 	host->sdio_irq_pending = true;
-	wake_up_process(host->sdio_irq_thread);
+	if (host->sdio_irq_thread)
+		wake_up_process(host->sdio_irq_thread);
 }
 
 #ifdef CONFIG_REGULATOR
-- 
1.7.9.5

--
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/