From d97e1b78239c7e7e441088e0b644bd3b076002e6 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 13 Apr 2010 11:33:54 +0200 Subject: ALSA: info - Check file position validity in common layer Check the validity of the file position in the common info layer before calling read or write callbacks in assumption that entry->size is set up properly to indicate the max file size. Removed the redundant checks from the callbacks as well. Signed-off-by: Takashi Iwai --- sound/pci/mixart/mixart.c | 12 ------------ 1 file changed, 12 deletions(-) (limited to 'sound/pci/mixart') diff --git a/sound/pci/mixart/mixart.c b/sound/pci/mixart/mixart.c index b5df78bcc25..be95e005c81 100644 --- a/sound/pci/mixart/mixart.c +++ b/sound/pci/mixart/mixart.c @@ -1161,13 +1161,7 @@ static ssize_t snd_mixart_BA0_read(struct snd_info_entry *entry, size_t count, loff_t pos) { struct mixart_mgr *mgr = entry->private_data; - unsigned long maxsize; - if (pos >= MIXART_BA0_SIZE) - return 0; - maxsize = MIXART_BA0_SIZE - pos; - if (count > maxsize) - count = maxsize; count = count & ~3; /* make sure the read size is a multiple of 4 bytes */ if (copy_to_user_fromio(buf, MIXART_MEM(mgr, pos), count)) return -EFAULT; @@ -1183,13 +1177,7 @@ static ssize_t snd_mixart_BA1_read(struct snd_info_entry *entry, size_t count, loff_t pos) { struct mixart_mgr *mgr = entry->private_data; - unsigned long maxsize; - if (pos > MIXART_BA1_SIZE) - return 0; - maxsize = MIXART_BA1_SIZE - pos; - if (count > maxsize) - count = maxsize; count = count & ~3; /* make sure the read size is a multiple of 4 bytes */ if (copy_to_user_fromio(buf, MIXART_REG(mgr, pos), count)) return -EFAULT; -- cgit v1.2.3-18-g5258