From: Denis Arefev <arefev@swemel.ru>
To: Ian Abbott <abbotti@mev.co.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
H Hartley Sweeten <hsweeten@visionengravers.com>,
linux-kernel@vger.kernel.org, lvc-project@linuxtesting.org,
"# v5 . 15+" <stable@vger.kernel.org>
Subject: [PATCH] comedi: drivers: ni_tio: Fix arithmetic expression overflow
Date: Thu, 18 Jan 2024 15:33:48 +0300 [thread overview]
Message-ID: <20240118123348.45690-1-arefev@swemel.ru> (raw)
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")
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Denis Arefev <arefev@swemel.ru>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
---
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 * 1000UL;
ni_tio_set_sync_mode(counter);
return 0;
}
--
2.25.1
next reply other threads:[~2024-01-18 12:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-18 12:33 Denis Arefev [this message]
2024-01-18 12:34 ` [PATCH] comedi: drivers: ni_tio: Fix arithmetic expression overflow kernel test robot
-- strict thread matches above, loose matches on Subject: below --
2024-01-18 12:37 Denis Arefev
2024-01-18 14:14 ` Greg Kroah-Hartman
2024-01-18 14:37 ` David Laight
2024-01-18 15:23 ` Ian Abbott
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