rseq: Set rseq::cpu_id_start to 0 on unregistration

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The RSEQ rework changed that to RSEQ_CPU_UNINITILIZED, which is obviously
incompatible. Revert back to the original behavior.

Fixes: 0f085b4188 ("rseq: Provide and use rseq_set_ids()")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Tested-by: Dmitry Vyukov <dvyukov@google.com>
Link: https://patch.msgid.link/20260428224427.271566313%40kernel.org
Cc: stable@vger.kernel.org

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Thomas Gleixner 2026-04-28 10:10:19 +02:00 • committed by Peter Zijlstra

parent cb48828f06

commit 2cb68e4512

1 changed files with 9 additions and 11 deletions

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kernel/rseq.c

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