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NET: ROSE: Don't dereference NULL neighbour pointer.

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commit d496f7842aada20c61e6044b3395383fa972872c upstream.

A ROSE socket doesn't necessarily always have a neighbour pointer so check
if the neighbour pointer is valid before dereferencing it.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Tested-by: Bernard Pidoux <f6bvp@free.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Zefan Li <lizefan@huawei.com>
This commit is contained in:
Ralf Baechle 2015-06-19 00:46:53 +02:00 committed by Zefan Li
parent bd3fa7572a
commit bee5f3e274
1 changed files with 2 additions and 1 deletions
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3
net/rose/af_rose.c
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@ -194,7 +194,8 @@ static void rose_kill_by_device(struct net_device *dev)
if (rose->device == dev) { if (rose->device == dev) {
rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
rose->neighbour->use--; if (rose->neighbour)
rose->neighbour->use--;
rose->device = NULL; rose->device = NULL;
} }
} }