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93 lines
3.8 KiB
Text
93 lines
3.8 KiB
Text
From: Vasiliy Kulikov <segoon@openwall.com>
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Subject: [PATCH] core: dev: don't call BUG() on bad input
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Date: Mon, 14 Feb 2011 13:56:06 +0300
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Lines: 36
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Message-ID: <1297680967-11893-1-git-send-email-segoon@openwall.com>
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Cc: "David S. Miller" <davem@davemloft.net>,
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Eric Dumazet <eric.dumazet@gmail.com>,
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Tom Herbert <therbert@google.com>,
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Changli Gao <xiaosuo@gmail.com>,
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Jesse Gross <jesse@nicira.com>, netdev@vger.kernel.org
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To: linux-kernel@vger.kernel.org
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Archived-At: <http://permalink.gmane.org/gmane.linux.kernel/1099668>
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alloc_netdev() may be called with too long name (more that IFNAMSIZ bytes).
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Currently this leads to BUG(). Other insane inputs (bad txqs, rxqs) and
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even OOM don't lead to BUG(). Made alloc_netdev() return NULL, like on
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other errors.
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Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
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---
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Compile tested.
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net/core/dev.c | 5 ++++-
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1 files changed, 4 insertions(+), 1 deletions(-)
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diff --git a/net/core/dev.c b/net/core/dev.c
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index 6392ea0..12ef4b0 100644
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--- a/net/core/dev.c
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+++ b/net/core/dev.c
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@@ -5761,7 +5761,10 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
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size_t alloc_size;
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struct net_device *p;
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- BUG_ON(strlen(name) >= sizeof(dev->name));
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+ if (strnlen(name, sizeof(dev->name)) >= sizeof(dev->name)) {
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+ pr_err("alloc_netdev: Too long device name \n");
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+ return NULL;
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+ }
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if (txqs < 1) {
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pr_err("alloc_netdev: Unable to allocate device "
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--
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1.7.0.4
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--
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