Arnd Bergmann 6a1c70de40 lib/test_lockup: fix kernel pointer check for separate address spaces ...

[ Upstream commit 5a06fcb15b ]

test_kernel_ptr() uses access_ok() to figure out if a given address
points to user space instead of kernel space. However on architectures
that set CONFIG_ALTERNATE_USER_ADDRESS_SPACE, a pointer can be valid
for both, and the check always fails because access_ok() returns true.

Make the check for user space pointers conditional on the type of
address space layout.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2022-04-08 14:24:01 +02:00

16 KiB

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