From: Vasiliy Kulikov <segooon@gmail.com>
To: kernel-janitors@vger.kernel.org
Cc: Arnd Bergmann <arnd@arndb.de>,
Andrew Morton <akpm@linux-foundation.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Julia Lawall <julia@diku.dk>, Jiri Kosina <jkosina@suse.cz>,
linux-kernel@vger.kernel.org
Subject: [PATCH 1/8] char: applicom: fix information leak to userland
Date: Sun, 17 Oct 2010 18:41:12 +0400 [thread overview]
Message-ID: <1287326472-7897-1-git-send-email-segooon@gmail.com> (raw)
Structure st_loc is copied to userland with some fields unitialized.
It leads to leaking of stack memory.
Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
---
Compile tested.
drivers/char/applicom.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/drivers/char/applicom.c b/drivers/char/applicom.c
index e7ba774..25373df 100644
--- a/drivers/char/applicom.c
+++ b/drivers/char/applicom.c
@@ -566,6 +566,7 @@ static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_
struct mailbox mailbox;
/* Got a packet for us */
+ memset(&st_loc, 0, sizeof(st_loc));
ret = do_ac_read(i, buf, &st_loc, &mailbox);
spin_unlock_irqrestore(&apbs[i].mutex, flags);
set_current_state(TASK_RUNNING);
--
1.7.0.4
reply other threads:[~2010-10-17 14:41 UTC|newest]
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