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| author | Tao Cui <cuitao@kylinos.cn> | 2026-08-12 16:55:36 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-08-17 17:25:49 -0700 |
| commit | e99c1ca890716a45d843f289c617d1bca00ba237 (patch) | |
| tree | e411646a1f7f7c1b413ead9317bcdf371872a49f /tools/perf/scripts/python/bin/stackcollapse-report | |
| parent | ff31c9a708e646732f4ca880bc75f7a63b6099ba (diff) | |
mptcp: pm: add WARN_ON_ONCE guards on extra_subflows underflow
extra_subflows is a u8 counter that can underflow if a decrement races
with or precedes an increment. While the recently fixed userspace PM
subflow creation path eliminated the primary cause, add defensive
WARN_ON_ONCE guards at both decrement sites to catch any remaining edge
cases rather than silently wrapping to 255.
Signed-off-by: Tao Cui <cuitao@kylinos.cn>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20260812-net-next-mptcp-misc-feat-7-3-v1-1-1905a818f6cb@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-report')
0 files changed, 0 insertions, 0 deletions