| Message ID | 20230717165538.1542034-1-quic_bjorande@quicinc.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | rpmsg: glink: Avoid dereferencing NULL channel | expand |
On Mon, Jul 17, 2023 at 09:55:38AM -0700, Bjorn Andersson wrote: > The newly introduced signal command handler checks for non-existing > channel and print an error message, but then continues on to dereference > that same channel. > > Instead abort the handler when no channel is found. > > Fixes: a2b73aa512a4 ("rpmsg: glink: Add support to handle signals command") > Reported-by: kernel test robot <lkp@intel.com> > Reported-by: Dan Carpenter <dan.carpenter@linaro.org> > Closes: https://lore.kernel.org/r/202307160800.sb7gMnL6-lkp@intel.com/ > Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com> > --- > drivers/rpmsg/qcom_glink_native.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c > index e10c05ed21bb..82d460ff4777 100644 > --- a/drivers/rpmsg/qcom_glink_native.c > +++ b/drivers/rpmsg/qcom_glink_native.c > @@ -1070,8 +1070,10 @@ static void qcom_glink_handle_signals(struct qcom_glink *glink, > spin_lock_irqsave(&glink->idr_lock, flags); > channel = idr_find(&glink->rcids, rcid); > spin_unlock_irqrestore(&glink->idr_lock, flags); > - if (!channel) > + if (!channel) { > dev_err(glink->dev, "signal for non-existing channel\n"); > + return; > + } I have applied this patch. Thanks, Mathieu > > enable = sigs & NATIVE_DSR_SIG || sigs & NATIVE_CTS_SIG; > > -- > 2.25.1 >
diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c index e10c05ed21bb..82d460ff4777 100644 --- a/drivers/rpmsg/qcom_glink_native.c +++ b/drivers/rpmsg/qcom_glink_native.c @@ -1070,8 +1070,10 @@ static void qcom_glink_handle_signals(struct qcom_glink *glink, spin_lock_irqsave(&glink->idr_lock, flags); channel = idr_find(&glink->rcids, rcid); spin_unlock_irqrestore(&glink->idr_lock, flags); - if (!channel) + if (!channel) { dev_err(glink->dev, "signal for non-existing channel\n"); + return; + } enable = sigs & NATIVE_DSR_SIG || sigs & NATIVE_CTS_SIG;
The newly introduced signal command handler checks for non-existing channel and print an error message, but then continues on to dereference that same channel. Instead abort the handler when no channel is found. Fixes: a2b73aa512a4 ("rpmsg: glink: Add support to handle signals command") Reported-by: kernel test robot <lkp@intel.com> Reported-by: Dan Carpenter <dan.carpenter@linaro.org> Closes: https://lore.kernel.org/r/202307160800.sb7gMnL6-lkp@intel.com/ Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com> --- drivers/rpmsg/qcom_glink_native.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)