The value of an arithmetic expression period_ns * 1000 is subject
to overflow due to a failure to cast operands to a larger data
type before performing arithmetic
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 3e90b1c7ebe9 ("staging: comedi: ni_tio: tidy up ni_tio_set_clock_src() and helpers")
Cc: <stable@xxxxxxxxxxxxxxx> # v5.15+
Reviewed-by: Ian Abbott <abbotti@xxxxxxxxx>
Signed-off-by: Denis Arefev <arefev@xxxxxxxxx>
Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx>
---
V1 -> V2: Oh, good point. It should be 1000ULL.
drivers/comedi/drivers/ni_tio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/comedi/drivers/ni_tio.c b/drivers/comedi/drivers/ni_tio.c
index da6826d77e60..acc914903c70 100644
--- a/drivers/comedi/drivers/ni_tio.c
+++ b/drivers/comedi/drivers/ni_tio.c
@@ -800,7 +800,7 @@ static int ni_tio_set_clock_src(struct ni_gpct *counter,
GI_PRESCALE_X2(counter_dev->variant) |
GI_PRESCALE_X8(counter_dev->variant), bits);
}
- counter->clock_period_ps = period_ns * 1000;
+ counter->clock_period_ps = period_ns * 1000ULL;
ni_tio_set_sync_mode(counter);
return 0;
}
--
2.25.1
