The patch titled
spi/spidev: check message size before copying
has been added to the -mm tree. Its filename is
spi-spidev-check-message-size-before-copying.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: spi/spidev: check message size before copying
From: Domen Puncer <[EMAIL PROTECTED]>
Message size needs to be checked before copying, or bad things could
happen.
Signed-off-by: Domen Puncer <[EMAIL PROTECTED]>
Signed-off-by: David Brownell <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
drivers/spi/spidev.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff -puN drivers/spi/spidev.c~spi-spidev-check-message-size-before-copying
drivers/spi/spidev.c
--- a/drivers/spi/spidev.c~spi-spidev-check-message-size-before-copying
+++ a/drivers/spi/spidev.c
@@ -168,6 +168,12 @@ static int spidev_message(struct spidev_
n--, k_tmp++, u_tmp++) {
k_tmp->len = u_tmp->len;
+ total += k_tmp->len;
+ if (total > bufsiz) {
+ status = -EMSGSIZE;
+ goto done;
+ }
+
if (u_tmp->rx_buf) {
k_tmp->rx_buf = buf;
if (!access_ok(VERIFY_WRITE, u_tmp->rx_buf, u_tmp->len))
@@ -179,12 +185,6 @@ static int spidev_message(struct spidev_
u_tmp->len))
goto done;
}
-
- total += k_tmp->len;
- if (total > bufsiz) {
- status = -EMSGSIZE;
- goto done;
- }
buf += k_tmp->len;
k_tmp->cs_change = !!u_tmp->cs_change;
_
Patches currently in -mm which might be from [EMAIL PROTECTED] are
mpc52xx_psc_spi-fix-it-for-config_ppc_merge.patch
spi-spidev-check-message-size-before-copying.patch
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