From a299478ac16fbc6830afe50620251bcf25b0132a Mon Sep 17 00:00:00 2001 From: "jingxian.li" Date: Tue, 4 Nov 2025 17:27:42 +0800 Subject: Revert "perf dso: Add missed dso__put to dso__load_kcore" This reverts commit e5de9ea7796e79f3cd082624f788cc3442bff2a8. The patch introduced `map__zput(new_node->map)` in the kcore load path, causing a segmentation fault when running `perf c2c report`. The issue arises because `maps__merge_in` directly modifies and inserts the caller's `new_map`, causing it to be freed prematurely while still referenced by kmaps. Later branchs (6.12, 6.15, 6.16) are not affected because they use a different merge approach with a lazily sorted array, which avoids modifying the original `new_map`. Fixes: e5de9ea7796e ("perf dso: Add missed dso__put to dso__load_kcore") Signed-off-by: jingxian.li Signed-off-by: Greg Kroah-Hartman --- tools/perf/util/symbol.c | 1 - 1 file changed, 1 deletion(-) (limited to 'tools') diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 4f0bbebcb6d6..ea24f21aafc3 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -1366,7 +1366,6 @@ static int dso__load_kcore(struct dso *dso, struct map *map, goto out_err; } } - map__zput(new_node->map); free(new_node); } -- cgit v1.2.3