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Sun, 8 Apr 2018 20:20:32 -0400 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Arnd Bergmann , Thomas Gleixner , Andi Kleen , Nicolas Pitre , Peter Zijlstra , Dave Hansen , Andy Lutomirski , Josh Poimboeuf , Borislav Petkov , Vlastimil Babka , Sasha Levin Subject: [PATCH AUTOSEL for 4.15 141/189] x86/dumpstack: Avoid uninitlized variable Thread-Topic: [PATCH AUTOSEL for 4.15 141/189] x86/dumpstack: Avoid uninitlized variable Thread-Index: AQHTz5hQkVxYcYH2SkeekWG29rcgqA== Date: Mon, 9 Apr 2018 00:18:41 +0000 Message-ID: <20180409001637.162453-141-alexander.levin@microsoft.com> References: <20180409001637.162453-1-alexander.levin@microsoft.com> In-Reply-To: <20180409001637.162453-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DM5PR2101MB1110;7:q56VWK8qEWi82wX/ge/P5/1bctzcJNIY0mxw8Q2ZDHrGP8g741eyOHZ7b7DdcdTIewYfUPuX/XzCBagbHRYmO1Xumc0WabPjv+I6fh/SqvTvpKF/QHOGXyA+F1yH7oq5NMvn0N3hpfL4bpds1Ad/Z7GjXt0EhwXDrLDw3FBFCfTidLr3OXSi6nDW/2/JHLxINqym7rVLF7QzZ2B5eKG6BJ/jhUwZP1jZ4+TGJYIOAYwDpQ8I4mG7Hl/S/oUT5UFw;20:DWegGj13jVKgwt/mjaRMXx0zfwUDjGFXCmgqUFjoq5BaQAv+eToAQmjVG78sp29Hg5hQtdbr4MrNpGaiKzjfRQDu9j1hUGpl/vfAB8VXUcF+E0gELuJqzMee99GmbG8QIvdLKS9SGo1KOAankFxv1xIaP/7jt7PdflVNVfbRggk= x-ms-office365-filtering-ht: Tenant X-MS-Office365-Filtering-Correlation-Id: fcaffa6d-2c1b-4ad1-9b63-08d59dafad3f x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB1110; 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x-microsoft-antispam-message-info: k6qSu3NdU4WRY0OPAIxU0Hbgu2uuW4TfxOuMmTk+otnsS8aXC6JEt765NRzxZPKTPrjpFPOLTYmA7X+cmEYT8fqAt8mCsNH6MR9ehklMYX9qQujG++Z/DTMN5ITS5nMzeA8ffj2FEhcHiAjZDZodiFbTe7ZEZFXkf7/gBc0oO3yWrJu+8n/N62VDtyBEW/1HARcRzJaR8s45KqMJsfCvjdijbyYoT026D14WC0KPxrOKP4Ok8ozaKMsCOupr8vJS5vGozN/+1MCfivGzN9Mr7yw4IAxfbvpXZj5BYaG1DDRchWMHTXq1Xt6+O/FRP/a3JTWQx0/U/XG5vWYAYOq57AMUscnCZjMcUTHewTGUh+LLZ7/2huOEBHgW9DK7hUEsgMrQpiIkrVDjRY0JmMRwvAPBaP2iJYwVcUDmEdcwY10= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: fcaffa6d-2c1b-4ad1-9b63-08d59dafad3f X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Apr 2018 00:18:41.6282 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB1110 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Arnd Bergmann [ Upstream commit ebfc15019cfa72496c674ffcb0b8ef10790dcddc ] In some configurations, 'partial' does not get initialized, as shown by this gcc-8 warning: arch/x86/kernel/dumpstack.c: In function 'show_trace_log_lvl': arch/x86/kernel/dumpstack.c:156:4: error: 'partial' may be used uninitializ= ed in this function [-Werror=3Dmaybe-uninitialized] show_regs_if_on_stack(&stack_info, regs, partial); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ This initializes it to false, to get the previous behavior in this case. Fixes: a9cdbe72c4e8 ("x86/dumpstack: Fix partial register dumps") Signed-off-by: Arnd Bergmann Signed-off-by: Thomas Gleixner Cc: Andi Kleen Cc: Nicolas Pitre Cc: Peter Zijlstra Cc: Dave Hansen Cc: Andy Lutomirski Cc: Josh Poimboeuf Cc: Borislav Petkov Cc: Vlastimil Babka Link: https://lkml.kernel.org/r/20180202145634.200291-1-arnd@arndb.de Signed-off-by: Sasha Levin --- arch/x86/kernel/dumpstack.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c index afbecff161d1..a2d8a3908670 100644 --- a/arch/x86/kernel/dumpstack.c +++ b/arch/x86/kernel/dumpstack.c @@ -109,7 +109,7 @@ void show_trace_log_lvl(struct task_struct *task, struc= t pt_regs *regs, struct stack_info stack_info =3D {0}; unsigned long visit_mask =3D 0; int graph_idx =3D 0; - bool partial; + bool partial =3D false; =20 printk("%sCall Trace:\n", log_lvl); =20 --=20 2.15.1