From: Jiasheng Jiang jiasheng@iscas.ac.cn
stable inclusion from stable-v6.0.14 commit abfaf0eee97925905e742aa3b0b72e04a918fa9e category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6694U CVE: CVE-2022-3108
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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As the possible failure of the allocation, kmemdup() may return NULL pointer. Therefore, it should be better to check the 'props2' in order to prevent the dereference of NULL pointer.
Fixes: 3a87177eb141 ("drm/amdkfd: Add topology support for dGPUs") Signed-off-by: Jiasheng Jiang jiasheng@iscas.ac.cn Reviewed-by: Felix Kuehling Felix.Kuehling@amd.com Signed-off-by: Felix Kuehling Felix.Kuehling@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Ren Zhijie renzhijie2@huawei.com Reviewed-by: songping yu yusongping@huawei.com Reviewed-by: Chen Hui judy.chenhui@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c index 86b4dadf772e..02e3c650ed1c 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c @@ -408,6 +408,9 @@ static int kfd_parse_subtype_iolink(struct crat_subtype_iolink *iolink, return -ENODEV; /* same everything but the other direction */ props2 = kmemdup(props, sizeof(*props2), GFP_KERNEL); + if (!props2) + return -ENOMEM; + props2->node_from = id_to; props2->node_to = id_from; props2->kobj = NULL;