lkml.org 
[lkml]   [2022]   [Jan]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] thermal/int340x_thermal: Check for null pointer after calling kmemdup
Date
As the possible failure of the allocation, kmemdup() may return NULL
pointer.
Then the 'bin_attr_data_vault.private' will be NULL pointer but the
'bin_attr_data_vault.size' is not 0.
Therefore, it should be better to check the return value of kmemdup() to
avoid the wrong size.

Fixes: 0ba13c763aac ("thermal/int340x_thermal: Export GDDV")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
.../thermal/intel/int340x_thermal/int3400_thermal.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
index 19926beeb3b7..f869aeb087d3 100644
--- a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
+++ b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
@@ -457,17 +457,21 @@ static void int3400_setup_gddv(struct int3400_thermal_priv *priv)

obj = buffer.pointer;
if (obj->type != ACPI_TYPE_PACKAGE || obj->package.count != 1
- || obj->package.elements[0].type != ACPI_TYPE_BUFFER) {
- kfree(buffer.pointer);
- return;
- }
+ || obj->package.elements[0].type != ACPI_TYPE_BUFFER)
+ goto out_kfree;

priv->data_vault = kmemdup(obj->package.elements[0].buffer.pointer,
obj->package.elements[0].buffer.length,
GFP_KERNEL);
+ if (!priv->data_vault)
+ goto out_kfree;
+
bin_attr_data_vault.private = priv->data_vault;
bin_attr_data_vault.size = obj->package.elements[0].buffer.length;
kfree(buffer.pointer);
+
+out_kfree:
+ kfree(buffer.pointer);
}

static int int3400_thermal_probe(struct platform_device *pdev)
--
2.25.1
\
 
 \ /
  Last update: 2022-01-07 15:43    [W:1.835 / U:0.004 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site