lkml.org 
[lkml]   [2018]   [Nov]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] clk: davinci: check for devm_kasprintf() failure
Date
devm_kasprintf() may return NULL on failure of internal allocation thus
the assignment to lpsc->pm_domain.name is not safe if not checked. On
error davinci_lpsc_clk_register() returns a pointer to davinci_lpsc_clk
which is checked with IS_ERR() so returning ERR_PTR(-ENOMEM) should be
fine here.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Fixes: c6ed4d734bc7 ("clk: davinci: New driver for davinci PSC clocks")
---

Problem located with experimental coccinelle script

Patch was compile tested with: davinci_all_defconfig

Patch is against 4.20-rc3 (localversion-next is next-20181123)

drivers/clk/davinci/psc.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/clk/davinci/psc.c b/drivers/clk/davinci/psc.c
index 5b69e24..ca9b5c3 100644
--- a/drivers/clk/davinci/psc.c
+++ b/drivers/clk/davinci/psc.c
@@ -278,6 +278,11 @@ davinci_lpsc_clk_register(struct device *dev, const char *name,

lpsc->pm_domain.name = devm_kasprintf(dev, GFP_KERNEL, "%s: %s",
best_dev_name(dev), name);
+ if (!lpsc->pm_domain.name) {
+ kfree(lpsc);
+ return ERR_PTR(-ENOMEM);
+ }
+
lpsc->pm_domain.attach_dev = davinci_psc_genpd_attach_dev;
lpsc->pm_domain.detach_dev = davinci_psc_genpd_detach_dev;
lpsc->pm_domain.flags = GENPD_FLAG_PM_CLK;
--
2.1.4
\
 
 \ /
  Last update: 2018-11-23 18:38    [W:0.685 / U:0.004 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site