linux-kernel - [PATCH] clk: cdce925: change condition in cdce925_clk_round

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230901130359.20561-1-abelova@astralinux.ru>
Date:   Fri,  1 Sep 2023 16:03:59 +0300
From:   Anastasia Belova <abelova@...ralinux.ru>
To:     Michael Turquette <mturquette@...libre.com>
Cc:     Anastasia Belova <abelova@...ralinux.ru>,
        Stephen Boyd <sboyd@...nel.org>,
        Mike Looijmans <mike.looijmans@...ic.nl>,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        lvc-project@...uxtesting.org
Subject: [PATCH] clk: cdce925: change condition in cdce925_clk_round_rate

To avoid division by zero add check if
divider is zero.

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

Fixes: 19fbbbbcd3a3 ("Add TI CDCE925 I2C controlled clock synthesizer driver")
Signed-off-by: Anastasia Belova <abelova@...ralinux.ru>
---
 drivers/clk/clk-cdce925.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/clk-cdce925.c b/drivers/clk/clk-cdce925.c
index 96ac90364847..d903cdc3ad7d 100644
--- a/drivers/clk/clk-cdce925.c
+++ b/drivers/clk/clk-cdce925.c
@@ -441,7 +441,7 @@ static long cdce925_clk_round_rate(struct clk_hw *hw, unsigned long rate,
 	unsigned long l_parent_rate = *parent_rate;
 	u16 divider = cdce925_calc_divider(rate, l_parent_rate);
 
-	if (l_parent_rate / divider != rate) {
+	if (divider && l_parent_rate / divider != rate) {
 		l_parent_rate = cdce925_clk_best_parent_rate(hw, rate);
 		divider = cdce925_calc_divider(rate, l_parent_rate);
 		*parent_rate = l_parent_rate;
-- 
2.30.2