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[PATCH] pcmcia Oopses fixes

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Fix some NULL dereferences in the pcmcia code when using old userland
tools.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Benjamin Herrenschmidt 2006-05-15 09:43:53 -07:00 committed by Linus Torvalds
parent 9458513660
commit 73d5858809
1 changed files with 16 additions and 7 deletions
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23
drivers/pcmcia/pcmcia_ioctl.c
View file

@ -426,7 +426,7 @@ static int ds_open(struct inode *inode, struct file *file)
if (!warning_printed) {
printk(KERN_INFO "pcmcia: Detected deprecated PCMCIA ioctl "
"usage.\n");
"usage from process: %s.\n", current->comm);
printk(KERN_INFO "pcmcia: This interface will soon be removed from "
"the kernel; please expect breakage unless you upgrade "
"to new tools.\n");
@ -601,8 +601,12 @@ static int ds_ioctl(struct inode * inode, struct file * file,
ret = CS_BAD_ARGS;
else {
struct pcmcia_device *p_dev = get_pcmcia_device(s, buf->config.Function);
ret = pccard_get_configuration_info(s, p_dev, &buf->config);
pcmcia_put_dev(p_dev);
if (p_dev == NULL)
ret = CS_BAD_ARGS;
else {
ret = pccard_get_configuration_info(s, p_dev, &buf->config);
pcmcia_put_dev(p_dev);
}
}
break;
case DS_GET_FIRST_TUPLE:
@ -632,8 +636,12 @@ static int ds_ioctl(struct inode * inode, struct file * file,
ret = CS_BAD_ARGS;
else {
struct pcmcia_device *p_dev = get_pcmcia_device(s, buf->status.Function);
ret = pccard_get_status(s, p_dev, &buf->status);
pcmcia_put_dev(p_dev);
if (p_dev == NULL)
ret = CS_BAD_ARGS;
else {
ret = pccard_get_status(s, p_dev, &buf->status);
pcmcia_put_dev(p_dev);
}
}
break;
case DS_VALIDATE_CIS:
@ -665,9 +673,10 @@ static int ds_ioctl(struct inode * inode, struct file * file,
if (!(buf->conf_reg.Function &&
(buf->conf_reg.Function >= s->functions))) {
struct pcmcia_device *p_dev = get_pcmcia_device(s, buf->conf_reg.Function);
if (p_dev)
if (p_dev) {
ret = pcmcia_access_configuration_register(p_dev, &buf->conf_reg);
pcmcia_put_dev(p_dev);
pcmcia_put_dev(p_dev);
}
}
break;
case DS_GET_FIRST_REGION: