From 3208795e612406df04a32b46eb5ea5fccfa51d69 Mon Sep 17 00:00:00 2001
From: Selvan Mani <smani@micron.com>
Date: Wed, 7 Nov 2012 06:03:37 -0700
Subject: mtip32xx: fix potential crash on SEC_ERASE_UNIT
The mtip driver lifted this code from elsewhere and then added a special
handling check for SEC_ERASE_UNIT. If the caller tries to do a security
erase but passes no output data for the command then outbuf is not
allocated and the driver duly explodes.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Selvan Mani <smani@micron.com>
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
drivers/block/mtip32xx/mtip32xx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
(limited to 'drivers/block')
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index adc6f36564cf..dfb7196bbde9 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -2218,8 +2218,8 @@ static int exec_drive_taskfile(struct driver_data *dd,
fis.device);
/* check for erase mode support during secure erase.*/
- if ((fis.command == ATA_CMD_SEC_ERASE_UNIT)
- && (outbuf[0] & MTIP_SEC_ERASE_MODE)) {
+ if ((fis.command == ATA_CMD_SEC_ERASE_UNIT) && outbuf &&
+ (outbuf[0] & MTIP_SEC_ERASE_MODE)) {
erasemode = 1;
}
--
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