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| author | Ian Abbott <abbotti@mev.co.uk> | 2012-09-18 22:46:58 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-07 19:27:24 +0400 |
| commit | 03acba6021da7f7bde0c0886379873791c6e24bf (patch) | |
| tree | d0e1e7cbdc5ee0c912d876a00d413b6227a11404 | |
| parent | e451b6d10c4afa8244c02b731536bcad8800e6f7 (diff) | |
| download | linux-03acba6021da7f7bde0c0886379873791c6e24bf.tar.xz | |
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 ea8d109bb35e..10fe503d165a 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; |