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

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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 <[email protected]>
Tested-by: Bernard Pidoux <[email protected]>
Cc: [email protected] #2.6.11+
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Ralf Baechle 2015-06-19 00:46:53 +02:00 • committed by David S. Miller
commit d496f7842a
1 changed files with 2 additions and 1 deletions
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3
net/rose/af_rose.c
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@ -192,7 +192,8 @@ static void rose_kill_by_device(struct net_device *dev)
if (rose->device == dev) {
rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
rose->neighbour->use--;
if (rose->neighbour)
rose->neighbour->use--;
rose->device = NULL;
}
}