The patch titled Subject: kasan: export kasan_poison has been added to the -mm tree. Its filename is kasan-add-match-all-tag-tests-fix.patch This patch should soon appear at https://ozlabs.org/~akpm/mmots/broken-out/kasan-add-match-all-tag-tests-fix.patch and later at https://ozlabs.org/~akpm/mmotm/broken-out/kasan-add-match-all-tag-tests-fix.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Arnd Bergmann <arnd@xxxxxxxx> Subject: kasan: export kasan_poison The unit test module fails to build after adding a reference to kasan_poison: ERROR: modpost: "kasan_poison" [lib/test_kasan.ko] undefined! Export this symbol to make it available to loadable modules. Link: https://lkml.kernel.org/r/20210125112831.2156212-1-arnd@xxxxxxxxxx Fixes: b9b322c2bba9 ("kasan: add match-all tag tests") Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Reviewed-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx> Cc: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Cc: Marco Elver <elver@xxxxxxxxxx> Cc: Alexander Potapenko <glider@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/kasan/shadow.c | 1 + 1 file changed, 1 insertion(+) --- a/mm/kasan/shadow.c~kasan-add-match-all-tag-tests-fix +++ a/mm/kasan/shadow.c @@ -89,6 +89,7 @@ void kasan_poison(const void *address, s __memset(shadow_start, value, shadow_end - shadow_start); } +EXPORT_SYMBOL_GPL(kasan_poison); void kasan_unpoison(const void *address, size_t size) { _ Patches currently in -mm which might be from arnd@xxxxxxxx are kasan-add-match-all-tag-tests-fix.patch set_memory-allow-querying-whether-set_direct_map_-is-actually-enabled-fix.patch