Fwd: New Defects reported by Coverity Scan for ubuntu-zesty-kernel

[Colin Ian King]

Picked up on today's static analysis on Zesty:


-------- Forwarded Message --------
Subject: New Defects reported by Coverity Scan for ubuntu-zesty-kernel
Date: Fri, 09 Jun 2017 03:02:20 -0700
From: scan-admin at coverity.com
To: colin.king at canonical.com


Hi,

Please find the latest report on new defect(s) introduced to
ubuntu-zesty-kernel found with Coverity Scan.

1 new defect(s) introduced to ubuntu-zesty-kernel found with Coverity Scan.
2 defect(s), reported by Coverity Scan earlier, were marked fixed in the
recent build analyzed by Coverity Scan.

New defect(s) Reported-by: Coverity Scan
Showing 1 of 1 defect(s)


** CID 1056792:  Integer handling issues  (OVERFLOW_BEFORE_WIDEN)
/drivers/gpu/drm/mgag200/mgag200_mode.c: 1602 in
mga_vga_calculate_mode_bandwidth()


________________________________________________________________________________________________________
*** CID 1056792:  Integer handling issues  (OVERFLOW_BEFORE_WIDEN)
/drivers/gpu/drm/mgag200/mgag200_mode.c: 1602 in
mga_vga_calculate_mode_bandwidth()
1596     1597     	divisor = 1024;
1598     1599     	if (!mode->htotal || !mode->vtotal || !mode->clock)
1600     		return 0;
1601     >>>     CID 1056792:  Integer handling issues
(OVERFLOW_BEFORE_WIDEN)
>>>     Potentially overflowing expression "mode->hdisplay * mode->vdisplay" with type "int" (32 bits, signed) is evaluated using 32-bit arithmetic, and then used in a context that expects an expression of type "uint64_t" (64 bits, unsigned).
1602     	active_area = mode->hdisplay * mode->vdisplay;
1603     	total_area = mode->htotal * mode->vtotal;
1604     1605     	pixels_per_second = active_area * mode->clock * 1000;
1606     	do_div(pixels_per_second, total_area);
1607

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To view the defects in Coverity Scan visit,
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