diff options
| author | Julia Lawall <julia@diku.dk> | 2010-06-04 16:17:37 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-06-04 16:17:37 -0700 |
| commit | 0d0659c78d7ea29ad6c3c538dcaae0227f31b9d2 (patch) | |
| tree | 4383a16168096e94919c980a2cbcd7a5e81c6492 | |
| parent | 0fc251d9a6c9fb841b73f29dd73dcf91afe7883f (diff) | |
arch/sparc/kernel: Eliminate what looks like a NULL pointer dereference
At the point of the test, action cannot be NULL, as it has been dereferenced
in the code just above.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@r exists@
expression E,E1;
identifier f;
statement S1,S2,S3;
@@
if ((E == NULL && ...) || ...)
{
... when != if (...) S1 else S2
when != E = E1
* E->f
... when any
}
else S3
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | arch/sparc/kernel/sun4d_irq.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/sparc/kernel/sun4d_irq.c b/arch/sparc/kernel/sun4d_irq.c index ab036a72de5a..e11b4612dabb 100644 --- a/arch/sparc/kernel/sun4d_irq.c +++ b/arch/sparc/kernel/sun4d_irq.c @@ -183,7 +183,7 @@ void sun4d_free_irq(unsigned int irq, void *dev_id) goto out_unlock; } - if (action && tmp) + if (tmp) tmp->next = action->next; else *actionp = action->next; |