ARM: Remove address checking for MMUless devices

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commit 3ccea4784f upstream.

Commit 169f9102f9 ("ARM: 9350/1: fault: Implement
copy_from_kernel_nofault_allowed()") added the function to check address
before use. However, for devices without MMU, addr > TASK_SIZE will
always fail.  This patch move this function after the #ifdef CONFIG_MMU
statement.

Signed-off-by: Yanjun Yang <yangyj.ee@gmail.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218953
Fixes: 169f9102f9 ("ARM: 9350/1: fault: Implement copy_from_kernel_nofault_allowed()")
Link: https://lore.kernel.org/r/20240611100947.32241-1-yangyj.ee@gmail.com
Signed-off-by: Kees Cook <kees@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Yanjun Yang 2024-06-11 18:09:47 +08:00 • committed by Greg Kroah-Hartman

parent 7da1f403ad

commit 523b9c2ed5

1 changed files with 2 additions and 2 deletions

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arch/arm/mm/fault.c

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