| Message ID | 20210309101908.27688-1-srinivas.kandagatla@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | gpio: wcd934x: Fix shift-out-of-bounds error | expand |
On Tue, Mar 9, 2021 at 12:21 PM Srinivas Kandagatla <srinivas.kandagatla@linaro.org> wrote: > > bit-mask for pins 0 to 4 is BIT(0) to BIT(4) however we ended up with BIT(n - 1) > which is not right, and this was caught by below usban check It would be nice to reduce below to ~2-3 (significant) lines. > UBSAN: shift-out-of-bounds in /workspace/dev/linux/drivers/gpio/gpio-wcd934x.c:34:14 > qcom-q6v5-mss 4080000.remoteproc: failed to acquire pdc reset > remoteproc remoteproc2: releasing 4080000.remoteproc > shift exponent 4294967295 is too large for 64-bit type 'long unsigned int' > CPU: 6 PID: 155 Comm: kworker/6:2 Not tainted 5.12.0-rc1-00045-g508b7280ec3d-dirty #1396 > Hardware name: Thundercomm Dragonboard 845c (DT) > > Call trace: > dump_backtrace+0x0/0x1c0 > show_stack+0x18/0x68 > dump_stack+0xd8/0x134 > ubsan_epilogue+0x10/0x58 > __ubsan_handle_shift_out_of_bounds+0xf8/0x168 > wcd_gpio_get_direction+0xc8/0xd8 > gpiochip_add_data_with_key+0x4ac/0xe78 > devm_gpiochip_add_data_with_key+0x30/0x90 > wcd_gpio_probe+0xc8/0x118 > platform_probe+0x6c/0x118 > really_probe+0x24c/0x418 > driver_probe_device+0x68/0xf0 > __device_attach_driver+0xb4/0x110 After addressing above, FWIW, Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> > Fixes: 59c324683400 ("gpio: wcd934x: Add support to wcd934x gpio controller") > Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> > --- > drivers/gpio/gpio-wcd934x.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpio/gpio-wcd934x.c b/drivers/gpio/gpio-wcd934x.c > index 1cbce5990855..97e6caedf1f3 100644 > --- a/drivers/gpio/gpio-wcd934x.c > +++ b/drivers/gpio/gpio-wcd934x.c > @@ -7,7 +7,7 @@ > #include <linux/slab.h> > #include <linux/of_device.h> > > -#define WCD_PIN_MASK(p) BIT(p - 1) > +#define WCD_PIN_MASK(p) BIT(p) > #define WCD_REG_DIR_CTL_OFFSET 0x42 > #define WCD_REG_VAL_CTL_OFFSET 0x43 > #define WCD934X_NPINS 5 > -- > 2.21.0 >
On 09/03/2021 16:31, Andy Shevchenko wrote: > On Tue, Mar 9, 2021 at 12:21 PM Srinivas Kandagatla > <srinivas.kandagatla@linaro.org> wrote: >> >> bit-mask for pins 0 to 4 is BIT(0) to BIT(4) however we ended up with BIT(n - 1) >> which is not right, and this was caught by below usban check > > It would be nice to reduce below to ~2-3 (significant) lines. I agree! Will do that in next version! --srini > >> UBSAN: shift-out-of-bounds in /workspace/dev/linux/drivers/gpio/gpio-wcd934x.c:34:14 >> qcom-q6v5-mss 4080000.remoteproc: failed to acquire pdc reset >> remoteproc remoteproc2: releasing 4080000.remoteproc >> shift exponent 4294967295 is too large for 64-bit type 'long unsigned int' >> CPU: 6 PID: 155 Comm: kworker/6:2 Not tainted 5.12.0-rc1-00045-g508b7280ec3d-dirty #1396 >> Hardware name: Thundercomm Dragonboard 845c (DT) >> >> Call trace: >> dump_backtrace+0x0/0x1c0 >> show_stack+0x18/0x68 >> dump_stack+0xd8/0x134 >> ubsan_epilogue+0x10/0x58 >> __ubsan_handle_shift_out_of_bounds+0xf8/0x168 >> wcd_gpio_get_direction+0xc8/0xd8 >> gpiochip_add_data_with_key+0x4ac/0xe78 >> devm_gpiochip_add_data_with_key+0x30/0x90 >> wcd_gpio_probe+0xc8/0x118 >> platform_probe+0x6c/0x118 >> really_probe+0x24c/0x418 >> driver_probe_device+0x68/0xf0 >> __device_attach_driver+0xb4/0x110 > > After addressing above, FWIW, > Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> > >> Fixes: 59c324683400 ("gpio: wcd934x: Add support to wcd934x gpio controller") >> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> >> --- >> drivers/gpio/gpio-wcd934x.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/drivers/gpio/gpio-wcd934x.c b/drivers/gpio/gpio-wcd934x.c >> index 1cbce5990855..97e6caedf1f3 100644 >> --- a/drivers/gpio/gpio-wcd934x.c >> +++ b/drivers/gpio/gpio-wcd934x.c >> @@ -7,7 +7,7 @@ >> #include <linux/slab.h> >> #include <linux/of_device.h> >> >> -#define WCD_PIN_MASK(p) BIT(p - 1) >> +#define WCD_PIN_MASK(p) BIT(p) >> #define WCD_REG_DIR_CTL_OFFSET 0x42 >> #define WCD_REG_VAL_CTL_OFFSET 0x43 >> #define WCD934X_NPINS 5 >> -- >> 2.21.0 >> > >
diff --git a/drivers/gpio/gpio-wcd934x.c b/drivers/gpio/gpio-wcd934x.c index 1cbce5990855..97e6caedf1f3 100644 --- a/drivers/gpio/gpio-wcd934x.c +++ b/drivers/gpio/gpio-wcd934x.c @@ -7,7 +7,7 @@ #include <linux/slab.h> #include <linux/of_device.h> -#define WCD_PIN_MASK(p) BIT(p - 1) +#define WCD_PIN_MASK(p) BIT(p) #define WCD_REG_DIR_CTL_OFFSET 0x42 #define WCD_REG_VAL_CTL_OFFSET 0x43 #define WCD934X_NPINS 5
bit-mask for pins 0 to 4 is BIT(0) to BIT(4) however we ended up with BIT(n - 1) which is not right, and this was caught by below usban check UBSAN: shift-out-of-bounds in /workspace/dev/linux/drivers/gpio/gpio-wcd934x.c:34:14 qcom-q6v5-mss 4080000.remoteproc: failed to acquire pdc reset remoteproc remoteproc2: releasing 4080000.remoteproc shift exponent 4294967295 is too large for 64-bit type 'long unsigned int' CPU: 6 PID: 155 Comm: kworker/6:2 Not tainted 5.12.0-rc1-00045-g508b7280ec3d-dirty #1396 Hardware name: Thundercomm Dragonboard 845c (DT) Call trace: dump_backtrace+0x0/0x1c0 show_stack+0x18/0x68 dump_stack+0xd8/0x134 ubsan_epilogue+0x10/0x58 __ubsan_handle_shift_out_of_bounds+0xf8/0x168 wcd_gpio_get_direction+0xc8/0xd8 gpiochip_add_data_with_key+0x4ac/0xe78 devm_gpiochip_add_data_with_key+0x30/0x90 wcd_gpio_probe+0xc8/0x118 platform_probe+0x6c/0x118 really_probe+0x24c/0x418 driver_probe_device+0x68/0xf0 __device_attach_driver+0xb4/0x110 Fixes: 59c324683400 ("gpio: wcd934x: Add support to wcd934x gpio controller") Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> --- drivers/gpio/gpio-wcd934x.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)