perf map: Remove kernel map before updating start and end addresses
[ Upstream commitdf12e21d4e] In a debug build there is validation that mmap lists are sorted when taking a lock. In machine__update_kernel_mmap() the start and end addresses are updated resulting in an unsorted list before the map is removed from the list. When the map is removed, the lock is taken which triggers the validation and the failure: $ perf test "object code reading" --- start --- perf: util/maps.c:88: check_invariants: Assertion `map__start(prev) <= map__start(map)' failed. Aborted Fix it by updating the addresses after removal, but before insertion. The bug depends on the ordering and type of debug info on the system and doesn't reproduce everywhere. Fixes:659ad3492b("perf maps: Switch from rbtree to lazily sorted array for addresses") Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: James Clark <james.clark@arm.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Leo Yan <leo.yan@linux.dev> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Spoorthy S <spoorts2@in.ibm.com> Link: https://lore.kernel.org/r/20240410103458.813656-4-james.clark@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
committed by
Greg Kroah-Hartman
parent
bef6f79c72
commit
4211ba4096
@@ -1549,8 +1549,8 @@ static int machine__update_kernel_mmap(struct machine *machine,
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updated = map__get(orig);
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machine->vmlinux_map = updated;
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machine__set_kernel_mmap(machine, start, end);
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maps__remove(machine__kernel_maps(machine), orig);
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machine__set_kernel_mmap(machine, start, end);
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err = maps__insert(machine__kernel_maps(machine), updated);
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map__put(orig);
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