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mm/damon/core: fix commit_ops_filters by using correct nth function

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damos_commit_ops_filters() incorrectly uses damos_nth_filter() which
iterates core_filters.  As a result, performing a commit unintentionally
corrupts ops_filters.

Add damos_nth_ops_filter() which iterates ops_filters.  Use this function
to fix issues caused by wrong iteration.

Link: https://lkml.kernel.org/r/20250810124201.15743-1-ekffu200098@gmail.com
Fixes: 3607cc590f ("mm/damon/core: support committing ops_filters") # 6.15.x
Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Sang-Heon Jeon 2025-08-10 21:42:01 +09:00 committed by Andrew Morton
parent 9a6a6a3191
commit 63f5dec167
1 changed files with 13 additions and 1 deletions
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14
mm/damon/core.c
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@ -845,6 +845,18 @@ static struct damos_filter *damos_nth_filter(int n, struct damos *s)
return NULL; return NULL;
} }
static struct damos_filter *damos_nth_ops_filter(int n, struct damos *s)
{
struct damos_filter *filter;
int i = 0;
damos_for_each_ops_filter(filter, s) {
if (i++ == n)
return filter;
}
return NULL;
}
static void damos_commit_filter_arg( static void damos_commit_filter_arg(
struct damos_filter *dst, struct damos_filter *src) struct damos_filter *dst, struct damos_filter *src)
{ {
@ -908,7 +920,7 @@ static int damos_commit_ops_filters(struct damos *dst, struct damos *src)
int i = 0, j = 0; int i = 0, j = 0;
damos_for_each_ops_filter_safe(dst_filter, next, dst) { damos_for_each_ops_filter_safe(dst_filter, next, dst) {
src_filter = damos_nth_filter(i++, src); src_filter = damos_nth_ops_filter(i++, src);
if (src_filter) if (src_filter)
damos_commit_filter(dst_filter, src_filter); damos_commit_filter(dst_filter, src_filter);
else else