media: v4l2-dv-timings: prevent possible overflow in v4l2_detect_gtf()

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commit 3edd1fc48d upstream.

In v4l2_detect_gtf(), it seems safer to cast the 32-bit image_width
variable to the 64-bit type u64 before multiplying to avoid
a possible overflow. The resulting object code even seems to
look better, at least on x86_64.

Found by Linux Verification Center (linuxtesting.org) with Svace.

[Sergey: rewrote the patch subject/descripition]

Fixes: c9bc9f5075 ("[media] v4l2-dv-timings: fix overflow in gtf timings calculation")
Cc: stable@vger.kernel.org
Signed-off-by: Karina Yankevich <k.yankevich@omp.ru>
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Karina Yankevich 2024-08-21 14:31:34 +03:00 • committed by Greg Kroah-Hartman

parent b933486f6b

commit baea1762cd

1 changed files with 2 additions and 2 deletions

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drivers/media/v4l2-core/v4l2-dv-timings.c

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