[PATCH RESEND] mfd: Fix off-by-one value range checking for tps65910_i2c_write

Axel Lin
2011-05-16T14:19:12Z

If bytes == (TPS65910_MAX_REGISTER + 1), we have a buffer overflow when
doing memcpy(&msg[1], src, bytes).

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
---
drivers/mfd/tps65910.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/mfd/tps65910.c b/drivers/mfd/tps65910.c
index bf649cf..e318248 100644
--- a/drivers/mfd/tps65910.c
+++ b/drivers/mfd/tps65910.c
@@ -71,7 +71,7 @@ static int tps65910_i2c_write(struct tps65910 *tps65910, u8 reg,
u8 msg[TPS65910_MAX_REGISTER + 1];
int ret;

- if (bytes > (TPS65910_MAX_REGISTER + 1))
+ if (bytes > TPS65910_MAX_REGISTER)
return -EINVAL;

msg[0] = reg;
--
1.7.1