From: Kunwu Chan chentao@kylinos.cn
stable inclusion from stable-v6.6.9 commit 1e4f9b7abf54801e70350149d561c03d72966698 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8SU2D
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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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 Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- arch/arm/mach-omap2/id.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c index 98999aa8cc0c..7f387706368a 100644 --- a/arch/arm/mach-omap2/id.c +++ b/arch/arm/mach-omap2/id.c @@ -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; }