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Thu, 21 May 2026 12:28:53 -0700 (PDT) Received: from yash-Bravo-15-B5DD.local ([14.99.167.142]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c85198f4be7sm1194020a12.19.2026.05.21.12.28.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 May 2026 12:28:53 -0700 (PDT) From: Yash Suthar To: rostedt@goodmis.org, mhiramat@kernel.org Cc: mathieu.desnoyers@efficios.com, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, skhan@linuxfoundation.org, Yash Suthar Subject: [PATCH] tracing: Replace BUG_ON with lockdep_assert_held in uprobe_buffer functions Date: Fri, 22 May 2026 00:58:46 +0530 Message-ID: <20260521192846.8306-1-yashsuthar983@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Replace BUG_ON(!mutex_is_locked(&event_mutex)) with lockdep_assert_held(&event_mutex) in uprobe_buffer_enable() and uprobe_buffer_disable(). BUG_ON() will crash the kernel. mutex_is_locked() only checks if any task holds lock,but not the caller task. lockdep_assert_held() also check current task for lock and no crash on true condition. Signed-off-by: Yash Suthar Acked-by: Steven Rostedt --- kernel/trace/trace_uprobe.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 2cabf8a23ec5..aee0960d0cf7 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -912,7 +912,7 @@ static int uprobe_buffer_enable(void) { int ret =3D 0; =20 - BUG_ON(!mutex_is_locked(&event_mutex)); + lockdep_assert_held(&event_mutex); =20 if (uprobe_buffer_refcnt++ =3D=3D 0) { ret =3D uprobe_buffer_init(); @@ -927,7 +927,7 @@ static void uprobe_buffer_disable(void) { int cpu; =20 - BUG_ON(!mutex_is_locked(&event_mutex)); + lockdep_assert_held(&event_mutex); =20 if (--uprobe_buffer_refcnt =3D=3D 0) { for_each_possible_cpu(cpu) --=20 2.43.0