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fbdev: lxfb: Fix potential divide by zero
authorWei Chen <harperchen1110@gmail.com>
Wed, 15 Mar 2023 09:05:18 +0000 (09:05 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 6 Apr 2023 10:10:41 +0000 (12:10 +0200)
commit9f2a69d5e6770a064a7ae9bdab7e9907a8d292ff
tree864db1e2e9750bdea7f4e6f5662152f0a78bcacftree
parent8ab9eada22d93fa501072161ceedbd6d61bc8df7commit | diff
fbdev: lxfb: Fix potential divide by zero

[ Upstream commit 61ac4b86a4c047c20d5cb423ddd87496f14d9868 ]

var->pixclock can be assigned to zero by user. Without proper
check, divide by zero would occur in lx_set_clock.

Error out if var->pixclock is zero.

Signed-off-by: Wei Chen <harperchen1110@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/video/fbdev/geode/lxfb_core.c diff | blob | history
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