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([110.226.183.150]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7b9250cd969sm19692422b3a.23.2025.11.19.05.08.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Nov 2025 05:08:54 -0800 (PST) From: Clint George To: stern@rowland.harvard.edu, gregkh@linuxfoundation.org Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, david.hunter.linux@gmail.com, linux-kernel-mentees@lists.linux.dev, skhan@linuxfoundation.org, khalid@kernel.org, Clint George Subject: [PATCH 1/8] usb: gadget: dummy_hcd: replace BUG() with WARN_ON_ONCE() Date: Wed, 19 Nov 2025 18:38:33 +0530 Message-ID: <20251119130840.14309-2-clintbgeorge@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251119130840.14309-1-clintbgeorge@gmail.com> References: <20251119130840.14309-1-clintbgeorge@gmail.com> 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() with WARN_ON_ONCE() in dummy_validate_stream() when stream_id exceeds max_streams. This allows the kernel to continue running with a warning instead of crashing. Signed-off-by: Clint George --- Testing: - The function dummy_validate_stream() was tested using a test module that i created where i sent value of urb->stream_id greater than max_streams. When using BUG(), the kernel-space used to crash but after using WARN_ON_ONCE() the kernel-space does not crash and the module terminates gracefully - Ensured that the module builds properly drivers/usb/gadget/udc/dummy_hcd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/gadget/udc/dummy_hcd.c b/drivers/usb/gadget/udc/du= mmy_hcd.c index 1cefca660..41b7b6907 100644 --- a/drivers/usb/gadget/udc/dummy_hcd.c +++ b/drivers/usb/gadget/udc/dummy_hcd.c @@ -1254,7 +1254,7 @@ static int dummy_validate_stream(struct dummy_hcd *du= m_hcd, struct urb *urb) if (urb->stream_id > max_streams) { dev_err(dummy_dev(dum_hcd), "Stream id %d is out of range.\n", urb->stream_id); - BUG(); + WARN_ON_ONCE(1); return -EINVAL; } return 0; --=20 2.43.0