3e2a4c183a
To help avoid an architecture failing to correctly check kernel/user
boundaries when handling copy_to_user, copy_from_user, put_user, or
get_user, perform some simple tests and fail to load if any of them
behave unexpectedly.
Specifically, this is to make sure there is a way to notice if things
like what was fixed in commit 8404663f81d2 ("ARM: 7527/1: uaccess:
explicitly check __user pointer when !CPU_USE_DOMAINS") ever regresses
again, for any architecture.
Additionally, adds new "user" selftest target, which loads this module.
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 lines
282 B
Makefile
14 lines
282 B
Makefile
# Makefile for user memory selftests
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# No binaries, but make sure arg-less "make" doesn't trigger "run_tests"
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all:
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run_tests: all
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@if /sbin/modprobe test_user_copy ; then \
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rmmod test_user_copy; \
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echo "user_copy: ok"; \
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else \
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echo "user_copy: [FAIL]"; \
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exit 1; \
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fi
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