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Koen Kooi
bb34e69f3d
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Denys Dmytriyenko <denys@ti.com>
36 lines
1.0 KiB
Diff
36 lines
1.0 KiB
Diff
From 43917d0f4bc9e7b8d6f0cafd29da95d52f587c58 Mon Sep 17 00:00:00 2001
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From: Dan Carpenter <dan.carpenter@oracle.com>
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Date: Wed, 18 Jan 2012 12:56:02 +0300
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Subject: [PATCH 144/147] nfsd: don't allow zero length strings in
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cache_parse()
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commit 6d8d17499810479eabd10731179c04b2ca22152f upstream.
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There is no point in passing a zero length string here and quite a
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few of that cache_parse() implementations will Oops if count is
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zero.
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Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
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Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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net/sunrpc/cache.c | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
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index 72ad836..4530a91 100644
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--- a/net/sunrpc/cache.c
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+++ b/net/sunrpc/cache.c
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@@ -828,6 +828,8 @@ static ssize_t cache_do_downcall(char *kaddr, const char __user *buf,
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{
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ssize_t ret;
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+ if (count == 0)
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+ return -EINVAL;
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if (copy_from_user(kaddr, buf, count))
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return -EFAULT;
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kaddr[count] = '\0';
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--
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1.7.9.4
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