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authorVasily Averin <vvs@sw.ru>2007-07-17 04:04:25 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-17 10:23:06 -0700
commit010904cbed3db3464213fbc602802cc6f53e56e1 (patch)
tree988b0689b63757dbac896ec9c2a8bf6ebb76b618 /drivers/message/i2o
parent1725d71d992f5947bdd5b4f9a30fe8a05571fe66 (diff)
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wrong memory access in i2o_block_device_lock()
This patch fixes access to memory that has not been allocated: i2o_msg_get_wait() can returns errors different from I2O_QUEUE_EMPTY. But the result is checked only against this code. If it is not I2O_QUEUE_EMPTY then we dereference the error code as the pointer later. Signed-off-by: Vasily Averin <vvs@sw.ru> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Markus Lidel <Markus.Lidel@shadowconnect.com> Acked-by: Kirill Korotaev <dev@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/message/i2o')
-rw-r--r--drivers/message/i2o/i2o_block.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/message/i2o/i2o_block.c b/drivers/message/i2o/i2o_block.c
index b17c4b2bc9e..64a52bd7544 100644
--- a/drivers/message/i2o/i2o_block.c
+++ b/drivers/message/i2o/i2o_block.c
@@ -215,7 +215,7 @@ static int i2o_block_device_lock(struct i2o_device *dev, u32 media_id)
struct i2o_message *msg;
msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
- if (IS_ERR(msg) == I2O_QUEUE_EMPTY)
+ if (IS_ERR(msg))
return PTR_ERR(msg);
msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);