From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4F3DA54706D for ; Tue, 6 Oct 2026 00:09:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791245345; cv=none; b=obiTfDaOSRPStePlcYbzTeAkFgwhfX0vpxaH+0EA5cBB1I54Nf/u82u32OwK1PuvNhXW1cdUvVOZUZWvSU3HqMciKhWka/3iBYokDXM4cY7OLacOMnx3W+esGLPqifCSiIt7cRc+qTbmnHiewuqWIRBKhu1ABkG6qC/ayMl17hs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791245345; c=relaxed/simple; bh=HTEzC+xItDKfHTvj36ZKVCP+nKWEgL75n7V4em4XT0o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RabWL6XkaHBD9xKC/0XZFg+X4jT+I/ptOorhnJl3QLqnU6fvweXOA8SNTvW/Y592avDDiLVu7uQqrSYYOtMwni8WxKO1V4IBpJwmj+7c2uxijJnmWunWS5SFE+hiEb+sO9wA/PZTEwPWHhb4/40RtRoslLvyyHSZTsrHYRwvvV0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Ctv7Zqw8; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Ctv7Zqw8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2F5601F000FF; Tue, 6 Oct 2026 00:09:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1791245343; bh=PIQkp80iFt2iK/fBk10OIHZnMcOpabgulS/T3Sza77U=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Ctv7Zqw8rfycJ1k9MgCOGtMA5tBsKhZZBw0isFa42GlJ/4pXsHCFAwaEPcbeXwltp SSncwtYGT/tdsQffnXxjStvaOhRcoTq0PzzblbHKvPc6Vftorza+mDxLJIfkNq6HQv yzwvBlwGHcT0Ibci/oVALOydEDikgYQvmVoozkTZwdXQpqCrjYfcAuBZDwsG8+/pB5 Ibw8jQ7jDfQqw2yyVhdinM6fLt9++sFuwNbkmkv4kMTQBiXpv5WWCZZmeVx5No7cxY bAzUbQ3xZWyNO0+rJ4f+Vrnh0Dlom4TCRdH6at9vCE7eRJw3pK1n+a6+9rlS72nXTn btzL2pahqOFYg== From: Sasha Levin To: stable@vger.kernel.org Cc: Johan Hovold , sashiko-bot@kernel.org, stable@kernel.org, Greg Kroah-Hartman , Sasha Levin Subject: [PATCH 6.18.y] serial: abort TIOCMIWAIT on hangup Date: Mon, 5 Oct 2026 20:08:59 -0400 Message-ID: <20261006000850.3530203-1-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <2026100556-jimmy-pending-cc18@gregkh> References: <2026100556-jimmy-pending-cc18@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Johan Hovold [ Upstream commit eb35b73e133686e5b999eb7130c4e3d22fe03089 ] Add the missing hangup check to the TIOCMIWAIT wait loop to avoid going back to sleep (indefinitely) after being woken on hangup. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reported-by: sashiko-bot@kernel.org Link: https://lore.kernel.org/r/20260904115542.E20D11F00A3D@smtp.kernel.org Cc: stable@kernel.org Signed-off-by: Johan Hovold Link: https://patch.msgid.link/20260910130816.642699-5-johan@kernel.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- Depends on <20261005214655.3401887-1-sashal@kernel.org> drivers/tty/serial/serial_core.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 2bbccc376dc73..be0b01d7f427a 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -1251,6 +1251,11 @@ static int uart_wait_modem_status(struct tty_struct *tty, struct uart_state *sta break; } + if (tty_io_error(tty)) { + ret = -EIO; + break; + } + schedule(); /* see if a signal did it */ -- 2.53.0