Messages in this thread Patch in this message | | | Date | Fri, 14 Nov 2008 19:08:18 +0100 (CET) | From | Julia Lawall <> | Subject | [PATCH 3/3, repost] sound/pci/pcxhr/pcxhr.c: introduce missing kfree and pci_disable_device |
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From: Julia Lawall <julia@diku.dk>
Error handling code following a kzalloc should free the allocated data. The error handling code is adjusted to call pci_disable_device(pci); as well, as done later in the function
The semantic match that finds the problem is as follows: (http://www.emn.fr/x-info/coccinelle/)
// <smpl> @r exists@ local idexpression x; statement S; expression E; identifier f,l; position p1,p2; expression *ptr != NULL; @@
( if ((x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...)) == NULL) S | x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...); ... if (x == NULL) S ) <... when != x when != if (...) { <+...x...+> } x->f = E ...> ( return \(0\|<+...x...+>\|ptr\); | return@p2 ...; )
@script:python@ p1 << r.p1; p2 << r.p2; @@
print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line) // </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk> --- sound/pci/pcxhr/pcxhr.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/sound/pci/pcxhr/pcxhr.c b/sound/pci/pcxhr/pcxhr.c index 0e06c6c..73de6e9 100644 --- a/sound/pci/pcxhr/pcxhr.c +++ b/sound/pci/pcxhr/pcxhr.c @@ -1229,8 +1229,11 @@ static int __devinit pcxhr_probe(struct pci_dev *pci, const struct pci_device_id return -ENOMEM; } - if (snd_BUG_ON(pci_id->driver_data >= PCI_ID_LAST)) + if (snd_BUG_ON(pci_id->driver_data >= PCI_ID_LAST)) { + kfree(mgr); + pci_disable_device(pci); return -ENODEV; + } card_name = pcxhr_board_params[pci_id->driver_data].board_name; mgr->playback_chips = pcxhr_board_params[pci_id->driver_data].playback_chips; mgr->capture_chips = pcxhr_board_params[pci_id->driver_data].capture_chips;
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