fbdev: nvidia: Fix potential divide by zero

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[ Upstream commit 92e2a00f29 ]

variable var->pixclock can be set by user. In case it
equals to zero, divide by zero would occur in nvidiafb_set_par.

Similar crashes have happened in other fbdev drivers. There
is no check and modification on var->pixclock along the call
chain to nvidia_check_var and nvidiafb_set_par. We believe it
could also be triggered in driver nvidia from user site.

Signed-off-by: Wei Chen <harperchen1110@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Wei Chen 2023-03-15 07:18:31 +00:00 • committed by Greg Kroah-Hartman

parent 7fed453d4d

commit cf7857ed07

1 changed files with 2 additions and 0 deletions

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drivers/video/fbdev/nvidia/nvidia.c

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