perf synthetic-events: Fix line synchronization, bounds, and truncation bugs in proc maps reader

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Fix critical logic and boundary bugs in read_proc_maps_line() and caller.
Ensure any mid-line hex/dec/char parsing failure invokes io__drain_line()
safely, using a do-while loop to read and discard remaining characters
until a newline or EOF is reached. Clamp pathname extraction size to
account for trailing sample ID headers, use standard '//toolong' fallback
literal for over-length pathnames, emit timeout flags for truncated entries
securely via goto out;, and cast event buffer pointers to avoid
_FORTIFY_SOURCE array bounds aborts across synthesis handlers.

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

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Ian Rogers 2026-07-21 16:52:51 -07:00 • committed by Namhyung Kim

parent e46a9b8150

commit 505a498a37

1 changed files with 142 additions and 62 deletions

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tools/perf/util/synthetic-events.c

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