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ARM: OMAP2+: Fix null pointer dereference and memory leak in omap_soc_device_init

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[ Upstream commit c72b9c33ef9695ad7ce7a6eb39a9df8a01b70796 ]

kasprintf() returns a pointer to dynamically allocated memory which can
be NULL upon failure. When 'soc_dev_attr->family' is NULL,it'll trigger
the null pointer dereference issue, such as in 'soc_info_show'.

And when 'soc_device_register' fails, it's necessary to release
'soc_dev_attr->family' to avoid memory leaks.

Fixes: 6770b2114325 ("ARM: OMAP2+: Export SoC information to userspace")
Signed-off-by: Kunwu Chan <chentao@kylinos.cn>
Message-ID: <20231123145237.609442-1-chentao@kylinos.cn>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kunwu Chan 2023-11-23 22:52:37 +08:00 • committed by Ksawlii
parent 9e1e53993d
commit cb8ff060a5
1 changed files with 5 additions and 0 deletions
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5
arch/arm/mach-omap2/id.c
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@ -793,11 +793,16 @@ void __init omap_soc_device_init(void)
soc_dev_attr->machine = soc_name;
soc_dev_attr->family = omap_get_family();
if (!soc_dev_attr->family) {
kfree(soc_dev_attr);
return;
}
soc_dev_attr->revision = soc_rev;
soc_dev_attr->custom_attr_group = omap_soc_groups[0];
soc_dev = soc_device_register(soc_dev_attr);
if (IS_ERR(soc_dev)) {
kfree(soc_dev_attr->family);
kfree(soc_dev_attr);
return;
}