| Message ID | 1606467002-62964-1-git-send-email-luojiaxing@huawei.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] gpio: dwapb: fix NULL pointer dereference at dwapb_gpio_suspend() | expand |
On Fri, Nov 27, 2020 at 9:50 AM Luo Jiaxing <luojiaxing@huawei.com> wrote: > > Following Calltrace is found when running echo freeze > /sys/power/state. > > [ 272.755506] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 > [ 272.755585] Call trace: > [ 272.755587] dwapb_gpio_suspend+0x18/0x318 > [ 272.755588] pm_generic_suspend+0x2c/0x48 > [ 272.755595] acpi_subsys_suspend+0x60/0x70 > [ 272.755599] dpm_run_callback.isra.18+0x40/0xe0 > [ 272.755601] __device_suspend+0xf4/0x360 > > The reason is platform_set_drvdata() is deleted, and dwapb_gpio_suspend() > get *gpio by dev_get_drvdata(). > > Fixes: feeaefd378ca ("gpio: dwapb: Use resource managed GPIO-chip add data method") > Signed-off-by: Luo Jiaxing <luojiaxing@huawei.com> > Acked-by: Serge Semin <fancer.lancer@gmail.com> > Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> > > --- > v1->v2: > 1. reduce calltrace log > 2. delete blank line in tag block > --- > --- > drivers/gpio/gpio-dwapb.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c > index 2a9046c..4275c18 100644 > --- a/drivers/gpio/gpio-dwapb.c > +++ b/drivers/gpio/gpio-dwapb.c > @@ -724,6 +724,8 @@ static int dwapb_gpio_probe(struct platform_device *pdev) > return err; > } > > + platform_set_drvdata(pdev, gpio); > + > return 0; > } > > -- > 2.7.4 > Applied, thanks! Bartosz
diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c index 2a9046c..4275c18 100644 --- a/drivers/gpio/gpio-dwapb.c +++ b/drivers/gpio/gpio-dwapb.c @@ -724,6 +724,8 @@ static int dwapb_gpio_probe(struct platform_device *pdev) return err; } + platform_set_drvdata(pdev, gpio); + return 0; }
Following Calltrace is found when running echo freeze > /sys/power/state. [ 272.755506] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 [ 272.755585] Call trace: [ 272.755587] dwapb_gpio_suspend+0x18/0x318 [ 272.755588] pm_generic_suspend+0x2c/0x48 [ 272.755595] acpi_subsys_suspend+0x60/0x70 [ 272.755599] dpm_run_callback.isra.18+0x40/0xe0 [ 272.755601] __device_suspend+0xf4/0x360 The reason is platform_set_drvdata() is deleted, and dwapb_gpio_suspend() get *gpio by dev_get_drvdata(). Fixes: feeaefd378ca ("gpio: dwapb: Use resource managed GPIO-chip add data method") Signed-off-by: Luo Jiaxing <luojiaxing@huawei.com> Acked-by: Serge Semin <fancer.lancer@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> --- v1->v2: 1. reduce calltrace log 2. delete blank line in tag block --- --- drivers/gpio/gpio-dwapb.c | 2 ++ 1 file changed, 2 insertions(+)