From: Yang Yingliang <yangyingliang@huawei.com> To: <linux-kernel@vger.kernel.org>, <linux-sunxi@lists.linux.dev>, <linux-arm-kernel@lists.infradead.org>, <linux-clk@vger.kernel.org> Cc: <wens@csie.org>, <maxime@cerno.tech> Subject: [PATCH] clk: sunxi: sun9i-mmc: check return value after calling platform_get_resource() Date: Thu, 21 Apr 2022 21:43:08 +0800 [thread overview] Message-ID: <20220421134308.2885094-1-yangyingliang@huawei.com> (raw) It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value. Fixes: 7a6fca879f59 ("clk: sunxi: Add driver for A80 MMC config clocks/resets") Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- drivers/clk/sunxi/clk-sun9i-mmc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/clk/sunxi/clk-sun9i-mmc.c b/drivers/clk/sunxi/clk-sun9i-mmc.c index 542b31d6e96d..636bcf2439ef 100644 --- a/drivers/clk/sunxi/clk-sun9i-mmc.c +++ b/drivers/clk/sunxi/clk-sun9i-mmc.c @@ -109,6 +109,8 @@ static int sun9i_a80_mmc_config_clk_probe(struct platform_device *pdev) spin_lock_init(&data->lock); r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!r) + return -EINVAL; /* one clock/reset pair per word */ count = DIV_ROUND_UP((resource_size(r)), SUN9I_MMC_WIDTH); data->membase = devm_ioremap_resource(&pdev->dev, r); -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Yang Yingliang <yangyingliang@huawei.com> To: <linux-kernel@vger.kernel.org>, <linux-sunxi@lists.linux.dev>, <linux-arm-kernel@lists.infradead.org>, <linux-clk@vger.kernel.org> Cc: <wens@csie.org>, <maxime@cerno.tech> Subject: [PATCH] clk: sunxi: sun9i-mmc: check return value after calling platform_get_resource() Date: Thu, 21 Apr 2022 21:43:08 +0800 [thread overview] Message-ID: <20220421134308.2885094-1-yangyingliang@huawei.com> (raw) It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value. Fixes: 7a6fca879f59 ("clk: sunxi: Add driver for A80 MMC config clocks/resets") Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- drivers/clk/sunxi/clk-sun9i-mmc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/clk/sunxi/clk-sun9i-mmc.c b/drivers/clk/sunxi/clk-sun9i-mmc.c index 542b31d6e96d..636bcf2439ef 100644 --- a/drivers/clk/sunxi/clk-sun9i-mmc.c +++ b/drivers/clk/sunxi/clk-sun9i-mmc.c @@ -109,6 +109,8 @@ static int sun9i_a80_mmc_config_clk_probe(struct platform_device *pdev) spin_lock_init(&data->lock); r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!r) + return -EINVAL; /* one clock/reset pair per word */ count = DIV_ROUND_UP((resource_size(r)), SUN9I_MMC_WIDTH); data->membase = devm_ioremap_resource(&pdev->dev, r); -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2022-04-21 13:31 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-04-21 13:43 Yang Yingliang [this message] 2022-04-21 13:43 ` [PATCH] clk: sunxi: sun9i-mmc: check return value after calling platform_get_resource() Yang Yingliang 2022-04-23 19:45 ` Samuel Holland 2022-04-23 19:45 ` Samuel Holland 2022-04-25 17:59 ` Jernej Škrabec 2022-04-25 17:59 ` Jernej Škrabec -- strict thread matches above, loose matches on Subject: below -- 2021-09-18 7:37 Yang Yingliang 2021-09-18 7:37 ` Yang Yingliang 2021-11-02 21:41 ` Stephen Boyd 2021-11-02 21:41 ` Stephen Boyd
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20220421134308.2885094-1-yangyingliang@huawei.com \ --to=yangyingliang@huawei.com \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-clk@vger.kernel.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-sunxi@lists.linux.dev \ --cc=maxime@cerno.tech \ --cc=wens@csie.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.