Files
linux/tools/perf/util
Ian Rogers 20c9ccffcc perf maps: Ensure kmap is set up for all inserts
__maps__fixup_overlap_and_insert may split or directly insert a map,
when doing this the map may need to have a kmap set up for the sake of
the kmaps. The missing kmap set up fails the check_invariants test in
maps, later "Internal error" reports from map__kmap and ultimately
causes segfaults.

Similar fixes were added in commit e0e4e0b8b7 ("perf maps: Add
missing map__set_kmap_maps() when replacing a kernel map") and commit
25d9c0301d ("perf maps: Set the kmaps for newly created/added kernel
maps") but they missed cases. To try to reduce the risk of this,
update the kmap directly following any manual insert. This identified
another problem in maps__copy_from.

Fixes: e0e4e0b8b7 ("perf maps: Add missing map__set_kmap_maps() when replacing a kernel map")
Fixes: 25d9c0301d ("perf maps: Set the kmaps for newly created/added kernel maps")
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-09-15 10:03:23 -07:00
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