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[128.178.122.21]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3675a0fb9absm7892869f8f.80.2024.06.30.10.00.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 30 Jun 2024 10:00:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1719766805; x=1720371605; darn=nongnu.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=X7+B7DTvILz0hprjNPMxWKHIpvY7dKU6NeCNL63whXc=; b=GqkzUGZNtoX51VT86dMXJgsujYj+9w31jy0Gtehve6B1p12mXXloUiErqmvlQvc46k zB4kjfRbOgFIimVU7MUd9HCT/KWiIDYqaXVg6SnxTr0qFeJCAmJJk6fAk514rxl4CAFi iVFJigXD5t5NIdK68rbKW2lJM0DT1fp2keWT5U/J8oq3TZXH8tJ+Rw7/ABNVPFyNjvN3 NvuRWsrYQFZ5HPvwG6diiu4ldb2VLL+phAAm9x2cErzeXHF+UgGqLhTHAWdEPPbFe5pC /9ZiMoeZ/m3CGiRd2XvR/Wit+kFb2+5z4f3WVKedxR3AQdeASU83soKl8rnWChtaiUQB XPQQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1719766805; x=1720371605; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=X7+B7DTvILz0hprjNPMxWKHIpvY7dKU6NeCNL63whXc=; b=X4YS2CApfAwDWFu4eqnhXl28uUWE4ffiOvVjhylDNDHOrDemozhVz0HB6d6Px3nYhA hVwh5FmnYKYOBeGvXbA+PuIesOlyzvZrtVHWnJ/iooAinxAITG3Udu+7tOacVfI6VqDa gIhNPdi1j9euUzcpQ9sxQUsjOR6OWR5ALYtFTANKFKfdoD+IwaaVHx15/llWnxbwfAmt e99O7Rg01hY8f/ERFNx31o05wXNGZTLQBm+JeOYE3R6C1L+p2rvikdCgiBGmy3w5L37z aGksbTAI9yOcqYhlqGoqVB7kUHySPG8fMMxaXA2OGUOau4WVSAjKWWf+CzjTyF45AVyt CIgg== X-Forwarded-Encrypted: i=1; AJvYcCVbUEk5RXAtRy0J7DWtyGFNmlKThVA19YKUYkyqPP1Iqs9g78mfZPROrmuO/fpqyErSw2ouQmjBhIlcQElG0xcnpbNHbKKz8PvzDU/A4dY2ty7Vi7FB3gaD7YU= X-Gm-Message-State: AOJu0YzOepwPox+s+27WkRb5dpb03pfIRBo4iQXRNvzXhp7T6wyppkP3 9QtKSipg189oMorJKkP8sqWMCOAIil5K5tnRRps69cM7DK87JSk= X-Google-Smtp-Source: AGHT+IF4dU4YOWKtU7TDIrFUipixuuBduoRpjonV/oMYOAC0SuQBXVJvsiSqd4Lz/44nMpdyP+/Ang== X-Received: by 2002:a5d:47c5:0:b0:366:ee9b:847 with SMTP id ffacd0b85a97d-36775699500mr2359287f8f.14.1719766805184; Sun, 30 Jun 2024 10:00:05 -0700 (PDT) From: Zheyu Ma To: Peter Maydell , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Paolo Bonzini Cc: Zheyu Ma , qemu-arm@nongnu.org, qemu-devel@nongnu.org Subject: [PATCH] hw/char/pl011: ensure UARTIBRD register is 16-bit Date: Sun, 30 Jun 2024 18:59:47 +0200 Message-Id: <20240630165947.2975457-1-zheyuma97@gmail.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::334; envelope-from=zheyuma97@gmail.com; helo=mail-wm1-x334.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1719766838463100001 Content-Type: text/plain; charset="utf-8" The PL011 TRM says that "The 16-bit integer is written to the Integer Baud = Rate Register, UARTIBRD". Updated the handling of the UARTIBRD register to ensure only 16-bit values are written to it. ASAN log: =3D=3D2973125=3D=3DERROR: AddressSanitizer: FPE on unknown address 0x55f726= 29b348 (pc 0x55f72629b348 bp 0x7fffa24d0e00 sp 0x7fffa24d0d60 T0) #0 0x55f72629b348 in pl011_get_baudrate hw/char/pl011.c:255:17 #1 0x55f726298d94 in pl011_trace_baudrate_change hw/char/pl011.c:260:33 #2 0x55f726296fc8 in pl011_write hw/char/pl011.c:378:9 Reproducer: cat << EOF | qemu-system-aarch64 -display \ none -machine accel=3Dqtest, -m 512M -machine realview-pb-a8 -qtest stdio writeq 0x1000b024 0xf8000000 EOF Signed-off-by: Zheyu Ma --- hw/char/pl011.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/char/pl011.c b/hw/char/pl011.c index 8753b84a84..f962786e2a 100644 --- a/hw/char/pl011.c +++ b/hw/char/pl011.c @@ -374,7 +374,7 @@ static void pl011_write(void *opaque, hwaddr offset, s->ilpr =3D value; break; case 9: /* UARTIBRD */ - s->ibrd =3D value; + s->ibrd =3D value & 0xFFFF; pl011_trace_baudrate_change(s); break; case 10: /* UARTFBRD */ --=20 2.34.1