Kees Cook
e6d468d32c
lkdtm/heap: Avoid __alloc_size hint warning for VMALLOC_LINEAR_OVERFLOW
...
Once __alloc_size hints have been added, the compiler will (correctly!)
see this as an overflow. We are, however, trying to test for this
condition at run-time (not compile-time), so work around it with a
volatile int offset.
Cc: Arnd Bergmann <arnd@arndb.de >
Signed-off-by: Kees Cook <keescook@chromium.org >
Link: https://lore.kernel.org/r/20210818174855.2307828-5-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org >
2021-08-18 22:28:51 +02:00
Kees Cook
37a0ca7f3e
lkdtm/heap: Add init_on_alloc tests
...
Add SLAB and page allocator tests for init_on_alloc. Testing for
init_on_free was already happening via the poisoning tests.
Signed-off-by: Kees Cook <keescook@chromium.org >
Link: https://lore.kernel.org/r/20210623203936.3151093-10-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org >
2021-06-24 15:32:08 +02:00
Kees Cook
5b777131bd
lkdtm: Add CONFIG hints in errors where possible
...
For various failure conditions, try to include some details about where
to look for reasons about the failure.
Signed-off-by: Kees Cook <keescook@chromium.org >
Link: https://lore.kernel.org/r/20210623203936.3151093-8-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org >
2021-06-24 15:32:08 +02:00
Kees Cook
9c4f6ebc36
lkdtm/heap: Add vmalloc linear overflow test
...
Similar to the existing slab overflow and stack exhaustion tests, add
VMALLOC_LINEAR_OVERFLOW (and rename the slab test SLAB_LINEAR_OVERFLOW).
Additionally unmarks the test as destructive. (It should be safe in the
face of misbehavior.)
Signed-off-by: Kees Cook <keescook@chromium.org >
Link: https://lore.kernel.org/r/20210623203936.3151093-6-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org >
2021-06-24 15:32:07 +02:00
Kees Cook
e12145cf1c
lkdtm/heap: Avoid edge and middle of slabs
...
Har har, after I moved the slab freelist pointer into the middle of the
slab, now it looks like the contents are getting poisoned. Adjust the
test to avoid the freelist pointer again.
Fixes: 3202fa62fbstable@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org >
Link: https://lore.kernel.org/r/20200625203704.317097-3-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org >
2020-06-29 18:41:39 +02:00
Kees Cook
966fede8e4
lkdtm/heap: add tests for freelist hardening
...
This adds tests for double free and cross-cache freeing, which should both
be caught by CONFIG_SLAB_FREELIST_HARDENED.
Link: http://lkml.kernel.org/r/20190530045017.15252-4-keescook@chromium.org
Signed-off-by: Kees Cook <keescook@chromium.org >
Cc: Alexander Popov <alex.popov@linux.com >
Cc: Alexander Potapenko <glider@google.com >
Cc: Christoph Lameter <cl@linux.com >
Cc: David Rientjes <rientjes@google.com >
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org >
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com >
Cc: Matthew Wilcox <willy@infradead.org >
Cc: Pekka Enberg <penberg@kernel.org >
Signed-off-by: Andrew Morton <akpm@linux-foundation.org >
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org >
2019-07-12 11:05:41 -07:00
Kees Cook
039a1c4205
lkdtm: Relocate code to subdirectory
...
The LKDTM modules keep expanding, and it's getting weird to have each file
get a prefix. Instead, move to a subdirectory for cleaner handling.
Signed-off-by: Kees Cook <keescook@chromium.org >
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org >
2018-03-06 19:18:55 -08:00
