perf synthetic-events: Fix bounds, stale state, and misc flags in kernel module synthesis

Browse source

Clamp long DSO names to mmap/mmap2 filename boundaries accounting for
sample ID headers to prevent buffer overruns in
perf_event__synthesize_modules_maps_cb(). Explicitly clear misc flags and
union padding to prevent stale Build-ID state from leaking between module
synthesis events, and cast event buffer pointers to avoid _FORTIFY_SOURCE
array bounds aborts when zeroing padding trailers.

Assisted-by: Antigravity:gemini-3.5-flash
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

...

This commit is contained in:

Ian Rogers 2026-07-21 16:52:53 -07:00 • committed by Namhyung Kim

parent 093f58e60e

commit b97c535768

1 changed files with 50 additions and 20 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

70

tools/perf/util/synthetic-events.c

View file