| Message ID | 20240911-tzmem-null-ptr-v2-1-7c61b1a1b463@linaro.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | firmware: qcom: scm: fix SMC calls on ARM32 | expand |
On Wed, Sep 11, 2024 at 11:07:03AM GMT, Bartosz Golaszewski wrote: > From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> > > Some SCM calls can be invoked with __scm being NULL (the driver may not > have been and will not be probed as there's no SCM entry in device-tree). > Make sure we don't dereference a NULL pointer. > > Fixes: 449d0d84bcd8 ("firmware: qcom: scm: smc: switch to using the SCM allocator") > Reported-by: Rudraksha Gupta <guptarud@gmail.com> > Closes: https://lore.kernel.org/lkml/692cfe9a-8c05-4ce4-813e-82b3f310019a@gmail.com/ > Reviewed-by: Konrad Dybcio <konradybcio@kernel.org> > Tested-by: Rudraksha Gupta <guptarud@gmail.com> > Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> > --- > drivers/firmware/qcom/qcom_scm.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
On Wed, Sep 11, 2024 at 11:07:03AM +0200, Bartosz Golaszewski wrote: > From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> > > Some SCM calls can be invoked with __scm being NULL (the driver may not > have been and will not be probed as there's no SCM entry in device-tree). > Make sure we don't dereference a NULL pointer. > > Fixes: 449d0d84bcd8 ("firmware: qcom: scm: smc: switch to using the SCM allocator") > Reported-by: Rudraksha Gupta <guptarud@gmail.com> > Closes: https://lore.kernel.org/lkml/692cfe9a-8c05-4ce4-813e-82b3f310019a@gmail.com/ > Reviewed-by: Konrad Dybcio <konradybcio@kernel.org> > Tested-by: Rudraksha Gupta <guptarud@gmail.com> > Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Reviewed-by: Stephan Gerhold <stephan.gerhold@linaro.org> > --- > drivers/firmware/qcom/qcom_scm.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_scm.c > index 10986cb11ec0..8bac4915c211 100644 > --- a/drivers/firmware/qcom/qcom_scm.c > +++ b/drivers/firmware/qcom/qcom_scm.c > @@ -216,7 +216,7 @@ static DEFINE_SPINLOCK(scm_query_lock); > > struct qcom_tzmem_pool *qcom_scm_get_tzmem_pool(void) > { > - return __scm->mempool; > + return __scm ? __scm->mempool : NULL; > } > > static enum qcom_scm_convention __get_convention(void) > > -- > 2.43.0 >
diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_scm.c index 10986cb11ec0..8bac4915c211 100644 --- a/drivers/firmware/qcom/qcom_scm.c +++ b/drivers/firmware/qcom/qcom_scm.c @@ -216,7 +216,7 @@ static DEFINE_SPINLOCK(scm_query_lock); struct qcom_tzmem_pool *qcom_scm_get_tzmem_pool(void) { - return __scm->mempool; + return __scm ? __scm->mempool : NULL; } static enum qcom_scm_convention __get_convention(void)