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b=aZXM0Hbz3jBzMBjA3PTHkb44/446NeLJKl+Ftt1oQIPaBz8P1X9YBVOSkpjUMqG7ZalNvK vweenSE5nxbBnhnXwXzf94fejMkAiRZyVNTUlNfBxqb3jtBaB3wx3M9kX33VXTV2BZbFQ9 ET91n6oAeBN+DlKxLbkfk0nO3d7ko3s= X-MC-Unique: e516U8vANp2i_yS_TepwJQ-1 From: Thomas Huth To: qemu-devel@nongnu.org, Cornelia Huck , Christian Borntraeger Subject: [PATCH v3] target/s390x/arch_dump: Fix warning for the name field in the PT_NOTE section Date: Fri, 5 Feb 2021 10:39:21 +0100 Message-Id: <20210205093921.848260-1-thuth@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=thuth@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com 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=216.205.24.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.351, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-s390x@nongnu.org, Richard Henderson , David Hildenbrand Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" There is a compiler warning with GCC 9.3 when compiling with the -fsanitize=3Dthread compiler flag: In function 'strncpy', inlined from 's390x_write_elf64_notes' at ../target/s390x/arch_dump.c:2= 19:9: /usr/include/x86_64-linux-gnu/bits/string_fortified.h:106:10: error: '__builtin_strncpy' specified bound 8 equals destination size [-Werror=3Dstringop-truncation] Since the name should always be NUL-terminated, let's use g_strlcpy() to silence this warning. And while we're at it, also add an assert() to make sure that the provided names always fit the size field (which is fine for the current callers, the function is called once with "CORE" and once with "LINUX" as a name). Signed-off-by: Thomas Huth Reviewed-by: Christian Borntraeger --- v3: Do not touch the namesz field target/s390x/arch_dump.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/target/s390x/arch_dump.c b/target/s390x/arch_dump.c index 50fa0ae4b6..cc1330876b 100644 --- a/target/s390x/arch_dump.c +++ b/target/s390x/arch_dump.c @@ -212,11 +212,13 @@ static int s390x_write_elf64_notes(const char *note_n= ame, int note_size; int ret =3D -1; =20 + assert(strlen(note_name) < sizeof(note.name)); + for (nf =3D funcs; nf->note_contents_func; nf++) { memset(¬e, 0, sizeof(note)); note.hdr.n_namesz =3D cpu_to_be32(strlen(note_name) + 1); note.hdr.n_descsz =3D cpu_to_be32(nf->contents_size); - strncpy(note.name, note_name, sizeof(note.name)); + g_strlcpy(note.name, note_name, sizeof(note.name)); (*nf->note_contents_func)(¬e, cpu, id); =20 note_size =3D sizeof(note) - sizeof(note.contents) + nf->contents_= size; --=20 2.27.0