riscv/mm: Prevent kernel module to access user memory without uaccess routines

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We found this issue in an legacy out-of-tree kernel module
which didn't properly access user space pointer by get/put_user().
Such an illegal access loops in the page fault handler.
To resolve this, let it die here.

Signed-off-by: Eric Lin <tesheng@andestech.com>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

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Eric Lin 2020-12-04 13:42:59 +08:00 • committed by Palmer Dabbelt

parent 21733cb518

commit 21855cac82

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arch/riscv/mm/fault.c

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