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lib: add test module for CONFIG_DEBUG_VIRTUAL

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Add a test module that allows testing that CONFIG_DEBUG_VIRTUAL works
correctly, at least that it can catch invalid calls to virt_to_phys()
against the non-linear kernel virtual address map.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Florian Fainelli <[email protected]>
Cc: "Luis R. Rodriguez" <[email protected]>
Cc: Kees Cook <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Florian Fainelli 2017-09-08 16:15:31 -07:00 • committed by Linus Torvalds
commit e4dace3615
3 changed files with 61 additions and 0 deletions
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11
lib/Kconfig.debug
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@ -1930,6 +1930,17 @@ config TEST_KMOD
If unsure, say N.
config TEST_DEBUG_VIRTUAL
tristate "Test CONFIG_DEBUG_VIRTUAL feature"
depends on DEBUG_VIRTUAL
help
Test the kernel's ability to detect incorrect calls to
virt_to_phys() done against the non-linear part of the
kernel's virtual address map.
If unsure, say N.
source "samples/Kconfig"
source "lib/Kconfig.kgdb"