linux-kernel - [PATCH v2 1/3] pstore: add vmalloc error check

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Message-Id: <45f00388da1c77989369714431413a5bab5a69c4.1445163119.git.geliangtang@163.com>
Date:	Sun, 18 Oct 2015 18:49:23 +0800
From:	Geliang Tang <geliangtang@....com>
To:	Anton Vorontsov <anton@...msg.org>,
	Colin Cross <ccross@...roid.com>,
	Kees Cook <keescook@...omium.org>,
	Tony Luck <tony.luck@...el.com>
Cc:	Geliang Tang <geliangtang@....com>, linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/3] pstore: add vmalloc error check

When vmalloc is failed, let write_pmsg return -ENOMEM.

Signed-off-by: Geliang Tang <geliangtang@....com>
Acked-by: Kees Cook <keescook@...omium.org>
---
Changes in v2:
 - update commit log.
---
 fs/pstore/pmsg.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/pstore/pmsg.c b/fs/pstore/pmsg.c
index feb5dd2..5a2f05a 100644
--- a/fs/pstore/pmsg.c
+++ b/fs/pstore/pmsg.c
@@ -37,6 +37,8 @@ static ssize_t write_pmsg(struct file *file, const char __user *buf,
 	if (buffer_size > PMSG_MAX_BOUNCE_BUFFER_SIZE)
 		buffer_size = PMSG_MAX_BOUNCE_BUFFER_SIZE;
 	buffer = vmalloc(buffer_size);
+	if (!buffer)
+		return -ENOMEM;
 
 	mutex_lock(&pmsg_lock);
 	for (i = 0; i < count; ) {
-- 
2.5.0


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