On 2022/10/20 3:34, Jane Chu wrote:
Changes since v2 [1]: - revised commit comment for clarification; - cc linux-mm for expert's review on the kern_addr_valid() usage as suggested by Petr;
but this won't fix issue on archs which don't have correct kern_addr_valid(), right?
could we call copy_from_kernel_nofault() when it could works well, and skip it on early boot?
other options, call some functions in include/asm-generic/sections.h or include/linux/kallsyms.h?
- cc Kefeng Wang in light of his recent patch [2] [1]: https://lore.kernel.org/lkml/288a7aba-c647-b51f-bdb3-99a62449dbb3@xxxxxxxxxx/T/ [2]: https://lore.kernel.org/lkml/20221018074014.185687-1-wangkefeng.wang@xxxxxxxxxx/ Jane Chu (1): vsprintf: protect kernel from panic due to non-canonical pointer dereference lib/vsprintf.c | 3 +++ 1 file changed, 3 insertions(+)
