Fix against access random data bytes outside the
dev->chanmap array. Thanks to Oliver Neukum for
pointing me to this issue.
Patch is against 2.6.23-rc9-git6
Signed-off-by: Karsten Keil <[email protected]>
---
drivers/isdn/i4l/isdn_common.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/isdn/i4l/isdn_common.c b/drivers/isdn/i4l/isdn_common.c
index ec5f404..4910bca 100644
--- a/drivers/isdn/i4l/isdn_common.c
+++ b/drivers/isdn/i4l/isdn_common.c
@@ -1135,7 +1135,7 @@ isdn_read(struct file *file, char __user *buf, size_t count, loff_t * off)
if (count > dev->drv[drvidx]->stavail)
count = dev->drv[drvidx]->stavail;
len = dev->drv[drvidx]->interface->readstat(buf, count,
- drvidx, isdn_minor2chan(minor));
+ drvidx, isdn_minor2chan(minor - ISDN_MINOR_CTRL));
if (len < 0) {
retval = len;
goto out;
@@ -1207,7 +1207,8 @@ isdn_write(struct file *file, const char __user *buf, size_t count, loff_t * off
*/
if (dev->drv[drvidx]->interface->writecmd)
retval = dev->drv[drvidx]->interface->
- writecmd(buf, count, drvidx, isdn_minor2chan(minor));
+ writecmd(buf, count, drvidx,
+ isdn_minor2chan(minor - ISDN_MINOR_CTRL));
else
retval = count;
goto out;
--
Karsten Keil
SuSE Labs
ISDN and VOIP development
SUSE LINUX Products GmbH, Maxfeldstr.5 90409 Nuernberg, GF: Markus Rex, HRB 16746 (AG Nuernberg)