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[PATCH] I2C: Fix oops in eeprom driver

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This fixes an oops in the eeprom driver. It was first reported here:
  http://bugzilla.kernel.org/show_bug.cgi?id=4347

It was additionally discussed here (while tracking a completely
different bug):
  http://archives.andrew.net.au/lm-sensors/msg30021.html

The patch is already in 2.6.12-rc1:
  http://linux.bkbits.net:8080/linux-2.5/cset@1.2227

The oops happens when one reads data from the sysfs interface file such
that (off < 16) and (count < 16 - off). For example "sensors" from
lm_sensors 2.9.0 does this, and causes the oops.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Chris Wright <chrisw@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
khali@linux-fr.org 2005-04-07 11:21:37 -07:00 committed by Greg KH
parent 9150bdc070
commit 82e59799aa
1 changed files with 2 additions and 1 deletions
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3
drivers/i2c/chips/eeprom.c
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@ -130,7 +130,8 @@ static ssize_t eeprom_read(struct kobject *kobj, char *buf, loff_t off, size_t c
/* Hide Vaio security settings to regular users (16 first bytes) */
if (data->nature == VAIO && off < 16 && !capable(CAP_SYS_ADMIN)) {
int in_row1 = 16 - off;
size_t in_row1 = 16 - off;
in_row1 = min(in_row1, count);
memset(buf, 0, in_row1);
if (count - in_row1 > 0)
memcpy(buf + in_row1, &data->data[16], count - in_row1);