linux

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Nico Pache b2325bf860 kunit: kasan_test: disable fortify string checker on kmalloc_oob_memset

Similar to commit 09c6304e38e4 ("kasan: test: fix compatibility with
FORTIFY_SOURCE") the kernel is panicing in kmalloc_oob_memset_*.

This is due to the `ptr` not being hidden from the optimizer which would
disable the runtime fortify string checker.

kernel BUG at lib/string_helpers.c:1048!
Call Trace:
[<00000000272502e2>] fortify_panic+0x2a/0x30
([<00000000272502de>] fortify_panic+0x26/0x30)
[<001bffff817045c4>] kmalloc_oob_memset_2+0x22c/0x230 [kasan_test]

Hide the `ptr` variable from the optimizer to fix the kernel panic.  Also
define a memset_size variable and hide that as well.  This cleans up the
code and follows the same convention as other tests.

[npache@redhat.com: address review comments from Andrey]
  Link: https://lkml.kernel.org/r/20231214164423.6202-1-npache@redhat.com
Link: https://lkml.kernel.org/r/20231212232659.18839-1-npache@redhat.com
Signed-off-by: Nico Pache <npache@redhat.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

2023-12-20 13:46:19 -08:00

common.c

kasan: use internal prototypes matching gcc-13 builtins

2023-06-09 16:25:19 -07:00

generic.c

kasan: fix type cast in memory_is_poisoned_n

2023-07-08 09:29:32 -07:00

hw_tags.c

kasan: hw_tags: avoid invalid virt_to_page()

2023-05-02 17:23:27 -07:00

init.c

kasan: Add (pmd|pud)_init for LoongArch zero_(pud|p4d)_populate process