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ALSA: echoaudio - Eliminate use after free 

Use the call to snd_card_free in the error handling code at the end of the
function, as in the other error cases.

A simplified version of the semantic patch that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression E,E2;
@@

snd_card_free(E)
...
(
  E = E2
|
* E
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Julia Lawall 2010-04-02 14:47:59 +02:00 committed by Takashi Iwai
parent f11947c7c5
commit a0fd4345f9
1 changed files with 2 additions and 3 deletions
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5
sound/pci/echoaudio/echoaudio.c
View File

@ -2184,10 +2184,9 @@ static int __devinit snd_echo_probe(struct pci_dev *pci,
goto ctl_error; goto ctl_error;
#endif #endif
if ((err = snd_card_register(card)) < 0) { err = snd_card_register(card);
snd_card_free(card); if (err < 0)
goto ctl_error; goto ctl_error;
}
snd_printk(KERN_INFO "Card registered: %s\n", card->longname); snd_printk(KERN_INFO "Card registered: %s\n", card->longname);
pci_set_drvdata(pci, chip); pci_set_drvdata(pci, chip);