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mfd: Fix off-by-one value range checking for tps6507x
author
Axel Lin
<axel.lin@gmail.com>
Wed, 13 Oct 2010 02:44:39 +0000
(10:44 +0800)
committer
Samuel Ortiz
<sameo@linux.intel.com>
Thu, 28 Oct 2010 22:30:29 +0000
(
00:30
+0200)
If bytes == (TPS6507X_MAX_REGISTER + 1), we have a buffer overflow when
doing memcpy(&msg[1], src, bytes).
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
drivers/mfd/tps6507x.c
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diff --git
a/drivers/mfd/tps6507x.c
b/drivers/mfd/tps6507x.c
index
fc01976
..
33ba772
100644
(file)
--- a/
drivers/mfd/tps6507x.c
+++ b/
drivers/mfd/tps6507x.c
@@
-68,7
+68,7
@@
static int tps6507x_i2c_write_device(struct tps6507x_dev *tps6507x, char reg,
u8 msg[TPS6507X_MAX_REGISTER + 1];
int ret;
- if (bytes >
(TPS6507X_MAX_REGISTER + 1)
)
+ if (bytes >
TPS6507X_MAX_REGISTER
)
return -EINVAL;
msg[0] = reg;