tracing: Check operator stack capacity before pushing

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predicate_parse() uses the first operator stack entry before processing
any opening parentheses. A push then increments top before writing.
The existing check still permits that write when top already points to
the last allocated entry, which can access beyond the operator stack.

Reject the push when top reaches the last allocated entry.

Cc: stable@vger.kernel.org
Fixes: 39f7c41c90 ("tracing/filters: Enable filtering a cpumask field by another cpumask")
Link: https://patch.msgid.link/atELO9L0I9kg5CpC@Taeyangs-MacBook-Pro.local
Signed-off-by: Taeyang Lee <0wn@theori.io>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

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Taeyang Lee 2026-10-16 02:19:55 +09:00 • committed by Steven Rostedt

parent 803aa6fc2d

commit c47a7b11bc

1 changed files with 1 additions and 1 deletions

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kernel/trace/trace_events_filter.c

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