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McKenney" , Bart Van Assche , Alexander Potapenko , Andrew Morton , Nathan Chancellor Subject: [PATCH 09/14] kfence: Use lockdep_assume_ctx_held() in kfence_report_error() Date: Mon, 2 Nov 2026 13:34:39 -0800 Message-ID: <47e1cdbc0c41e20ed1fca14d958155f9bc21a534.1793654853.git.bvanassche@acm.org> X-Mailer: git-send-email 2.56.0.385.gac671c819a-goog In-Reply-To: References: X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Replace lockdep_assert_held(&meta->lock) with lockdep_assume_ctx_held(&meta->lock) in kfence_report_error(). kfence_print_object() requires holding &meta->lock. In kfence_report_error(), meta is optional (nullable), so the function cannot be annotated with __must_hold(&meta->lock). Currently, lockdep_assert_held(&meta->lock) implicitly assumes lock ownership for Clang context analysis. Prepare for removing the context assumption from lockdep_assert_held() by using lockdep_assume_ctx_held(&meta->lock) inside the "if (meta)" block. This informs Clang context analysis that meta->lock is held and preserves the runtime lockdep check. Signed-off-by: Bart Van Assche --- mm/kfence/report.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/kfence/report.c b/mm/kfence/report.c index d548536864b1..5b8588d35b77 100644 --- a/mm/kfence/report.c +++ b/mm/kfence/report.c @@ -286,7 +286,7 @@ kfence_report_error(unsigned long address, bool is_wr= ite, struct pt_regs *regs, stack_trace_print(stack_entries + skipnr, num_stack_entries - skipnr, 0= ); =20 if (meta) { - lockdep_assert_held(&meta->lock); + lockdep_assume_ctx_held(&meta->lock); pr_err("\n"); kfence_print_object(NULL, meta); }