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ima: Fix a potential NULL pointer access in ima_restore_measurement_list
commit 11220db upstream. In restore_template_fmt, when kstrdup fails, a non-NULL value will still be returned, which causes a NULL pointer access in template_desc_init_fields. Fixes: c7d0936 ("ima: support restoring multiple template formats") Cc: stable@kernel.org Co-developed-by: Jiaming Li <lijiaming30@huawei.com> Signed-off-by: Jiaming Li <lijiaming30@huawei.com> Signed-off-by: Huaxin Lu <luhuaxin1@huawei.com> Reviewed-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Mimi Zohar <zohar@linux.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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