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([2602:47:d483:7301:a064:e3f9:a812:973b]) by smtp.gmail.com with ESMTPSA id g14-20020a170902868e00b001bc2831e1a9sm13446584plo.90.2023.08.16.11.03.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Aug 2023 11:03:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1692209021; x=1692813821; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=BbPoiA4hDTDe4hGu5oLPJ3b2yV0sQkSxEUBuznSGCYM=; b=zw+dwHlCnf29iPqZKw64+5+ren92LHt0qfYE+wBM/DINK76rLtniDSfwqVvyk6vhmC 3Rzqz68IsZH3u/Br1aZEAN+69Xy3Cz2ZKAK9q5939gV6rCsc9OlqZvMN3VBXgJ6xcsaD 7335nYyn5eTs3y3NoLbI153fvXQxULbGRzS7o+TVJqPEnvirxFQI15jJP9KEGij+1/4x AjlSdaAuju8Y3Ys8dcf2TF1V/aeRm4oN0OxrFSCBwFzH+/eSR4zFoWVlV/W7Jif/6fRn Vjvppfuqx5kwp4rSoVStxq+0OZYWnRaKJ0yhrcunlbrQRpPkSarymd5zbQMa2vFYKCTN I9eA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692209021; x=1692813821; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=BbPoiA4hDTDe4hGu5oLPJ3b2yV0sQkSxEUBuznSGCYM=; b=dpVsrZiOYr3dY57GmTFPZoLJNeSjX2JrJ6TZ1gO7nNlDzFQ8xHyg5h3XHB5X2XHZwx p3gBCBNdDDEywrZB5+IUI25L4kaPRL7gE596MYLkK0WNZiFIvQTO6dcRphIJq9X9qRmH 4cbJuyvyrCQl6JkXVZl1Q/uxZfxLV/tQrjEpO97nW9mMNbNGomyvJ4QhP1aXS2HGXgjS s4qgi9fombWHGHDLcXM40meaRp4GzUaizAnLdtV8wDnw8r4WK3gfDkvjx23OA+nR164R oNxKdpljrA6G9rfudW5xLbUHu//uF2w/g2VcdFNctmxCCiJuOvh9nTcjUNhkf0pVfm9z NmkA== X-Gm-Message-State: AOJu0YwKrHEl8fupHiFCTQNnqK+Nma/Aht62fPYxIX6N1jtLx343t3mU AOiwGi+97vLRaeZkFtYUPlieBsI/8A5YUTGsUAQ= X-Google-Smtp-Source: AGHT+IHFhHT2okcUG9IOc6mJ4WsIImH34gHAdUmPYYtuHL7HPv7Zcz8ReYzvR9B6EfbNb00k2em7zg== X-Received: by 2002:a17:903:48c:b0:1be:1a2:8a85 with SMTP id jj12-20020a170903048c00b001be01a28a85mr2002807plb.0.1692209021128; Wed, 16 Aug 2023 11:03:41 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PATCH v4 02/18] linux-user: Tidy loader_exec Date: Wed, 16 Aug 2023 11:03:22 -0700 Message-Id: <20230816180338.572576-3-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230816180338.572576-1-richard.henderson@linaro.org> References: <20230816180338.572576-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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=2607:f8b0:4864:20::635; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x635.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, 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 @linaro.org) X-ZM-MESSAGEID: 1692209094167100001 Reorg the if cases to reduce indentation. Test for 4 bytes in the file before checking the signatures. Reviewed-by: Philippe Mathieu-Daud=C3=A9 Signed-off-by: Richard Henderson --- linux-user/linuxload.c | 42 +++++++++++++++++++++--------------------- 1 file changed, 21 insertions(+), 21 deletions(-) diff --git a/linux-user/linuxload.c b/linux-user/linuxload.c index 3536dd8104..5b7e9ab983 100644 --- a/linux-user/linuxload.c +++ b/linux-user/linuxload.c @@ -154,31 +154,31 @@ int loader_exec(int fdexec, const char *filename, cha= r **argv, char **envp, =20 retval =3D prepare_binprm(bprm); =20 - if (retval >=3D 0) { - if (bprm->buf[0] =3D=3D 0x7f - && bprm->buf[1] =3D=3D 'E' - && bprm->buf[2] =3D=3D 'L' - && bprm->buf[3] =3D=3D 'F') { - retval =3D load_elf_binary(bprm, infop); -#if defined(TARGET_HAS_BFLT) - } else if (bprm->buf[0] =3D=3D 'b' - && bprm->buf[1] =3D=3D 'F' - && bprm->buf[2] =3D=3D 'L' - && bprm->buf[3] =3D=3D 'T') { - retval =3D load_flt_binary(bprm, infop); -#endif - } else { - return -ENOEXEC; - } + if (retval < 4) { + return -ENOEXEC; } - - if (retval >=3D 0) { - /* success. Initialize important registers */ - do_init_thread(regs, infop); + if (bprm->buf[0] =3D=3D 0x7f + && bprm->buf[1] =3D=3D 'E' + && bprm->buf[2] =3D=3D 'L' + && bprm->buf[3] =3D=3D 'F') { + retval =3D load_elf_binary(bprm, infop); +#if defined(TARGET_HAS_BFLT) + } else if (bprm->buf[0] =3D=3D 'b' + && bprm->buf[1] =3D=3D 'F' + && bprm->buf[2] =3D=3D 'L' + && bprm->buf[3] =3D=3D 'T') { + retval =3D load_flt_binary(bprm, infop); +#endif + } else { + return -ENOEXEC; + } + if (retval < 0) { return retval; } =20 - return retval; + /* Success. Initialize important registers. */ + do_init_thread(regs, infop); + return 0; } =20 bool imgsrc_read(void *dst, off_t offset, size_t len, --=20 2.34.1