From: Qian Cai Date: Thu, 2 Apr 2020 04:04:37 +0000 (-0700) Subject: mm/Makefile: disable KCSAN for kmemleak X-Git-Tag: libata-5.7-2020-04-09~67^2~127 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=5f2d5026be67691af26327ab722db4dacaacf399;p=linux-block.git mm/Makefile: disable KCSAN for kmemleak Kmemleak could scan task stacks while plain writes happens to those stack variables which could results in data races. For example, in sys_rt_sigaction and do_sigaction(), it could have plain writes in a 32-byte size. Since the kmemleak does not care about the actual values of a non-pointer and all do_sigaction() call sites only copy to stack variables, just disable KCSAN for kmemleak to avoid annotating anything outside Kmemleak just because Kmemleak scans everything. Suggested-by: Marco Elver Signed-off-by: Qian Cai Signed-off-by: Andrew Morton Acked-by: Marco Elver Acked-by: Catalin Marinas Link: http://lkml.kernel.org/r/1583263716-25150-1-git-send-email-cai@lca.pw Signed-off-by: Linus Torvalds --- diff --git a/mm/Makefile b/mm/Makefile index 272e66039e70..dbc8346d16ca 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -6,6 +6,7 @@ KASAN_SANITIZE_slab_common.o := n KASAN_SANITIZE_slab.o := n KASAN_SANITIZE_slub.o := n +KCSAN_SANITIZE_kmemleak.o := n # These files are disabled because they produce non-interesting and/or # flaky coverage that is not a function of syscall inputs. E.g. slab is out of