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| author | Ian Abbott <abbotti@mev.co.uk> | 2012-09-18 19:46:58 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-07 08:32:24 -0700 |
| commit | 19dcf415184e1ef6d9641d76e3248d3b2677b3df (patch) | |
| tree | 288b3c87cb1d940642988fe5d6c491f0ddb4383a | |
| parent | 4483c56613f9ca0cff15d231975b240d3f3e8a10 (diff) | |
| download | linux-topics-19dcf415184e1ef6d9641d76e3248d3b2677b3df.tar.gz | |
staging: comedi: don't dereference user memory for INSN_INTTRIG
commit 5d06e3df280bd230e2eadc16372e62818c63e894 upstream.
`parse_insn()` is dereferencing the user-space pointer `insn->data`
directly when handling the `INSN_INTTRIG` comedi instruction. It
shouldn't be using `insn->data` at all; it should be using the separate
`data` pointer passed to the function. Fix it.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/staging/comedi/comedi_fops.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c index a796964bfff..28811890d70 100644 --- a/drivers/staging/comedi/comedi_fops.c +++ b/drivers/staging/comedi/comedi_fops.c @@ -843,7 +843,7 @@ static int parse_insn(struct comedi_device *dev, struct comedi_insn *insn, ret = -EAGAIN; break; } - ret = s->async->inttrig(dev, s, insn->data[0]); + ret = s->async->inttrig(dev, s, data[0]); if (ret >= 0) ret = 1; break; |