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| author |   Ingo Molnar <mingo@kernel.org> | 2025-04-11 07:40:38 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2025-04-11 11:01:34 +0200 |
| commit | 37725b64a9912292841cea7e9aebfd0f084ed8c0 (patch) | |
| tree | afe337d09f82402f0a73dd3270022db766ef51ae | |
| parent | x86/alternatives: Assert that smp_text_poke_int3_handler() can only ever handle 'tp_vec[]' based requests (diff) | |
| download | wireguard-linux-37725b64a9912292841cea7e9aebfd0f084ed8c0.tar.xz wireguard-linux-37725b64a9912292841cea7e9aebfd0f084ed8c0.zip | |
x86/alternatives: Assert input parameters in smp_text_poke_batch_process()
At this point the 'tp' input parameter must always be the
global 'tp_vec' array, and 'nr_entries' must always be equal
to 'tp_vec_nr'.
Assert these conditions - which will allow the removal of
a layer of indirection between these values.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Juergen Gross <jgross@suse.com>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250411054105.2341982-27-mingo@kernel.org
| -rw-r--r-- | arch/x86/kernel/alternative.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index 329f6ee6b3bc..4fa26a4351a6 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -2627,6 +2627,9 @@ static void smp_text_poke_batch_process(struct smp_text_poke_loc *tp, unsigned i lockdep_assert_held(&text_mutex); + WARN_ON_ONCE(tp != tp_vec); + WARN_ON_ONCE(nr_entries != tp_vec_nr); + int3_vec.vec = tp; int3_vec.nr_entries = nr_entries; |