From: Hyeongtak Ji <hyeongtak.ji@sk.com>
Date: Fri, 10 Nov 2023 05:37:09 +0000 (+0900)
Subject: mm/damon/core.c: avoid unintentional filtering out of schemes
X-Git-Tag: v6.6.3~243
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=1777bb5c740d6d8837dbae61b4694ef90f363221;p=thirdparty%2Fkernel%2Fstable.git

mm/damon/core.c: avoid unintentional filtering out of schemes

commit 13b2a4b22e98ff80b888a160a2acd92d81b05925 upstream.

The function '__damos_filter_out()' causes DAMON to always filter out
schemes whose filter type is anon or memcg if its matching value is set
to false.

This commit addresses the issue by ensuring that '__damos_filter_out()'
no longer applies to filters whose type is 'anon' or 'memcg'.

Link: https://lkml.kernel.org/r/1699594629-3816-1-git-send-email-hyeongtak.ji@gmail.com
Fixes: ab9bda001b681 ("mm/damon/core: introduce address range type damos filter")
Signed-off-by: Hyeongtak Ji <hyeongtak.ji@sk.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/mm/damon/core.c b/mm/damon/core.c
index 42fea05ecde45..fd5be73f699f4 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -914,7 +914,7 @@ static bool __damos_filter_out(struct damon_ctx *ctx, struct damon_target *t,
 		matched = true;
 		break;
 	default:
-		break;
+		return false;
 	}
 
 	return matched == filter->matching;