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([156.19.246.23]) by smtp.gmail.com with ESMTPSA id it12-20020a056a00458c00b006ead792b6f2sm11960864pfb.1.2024.04.24.15.51.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Apr 2024 15:51:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1713999088; x=1714603888; darn=nongnu.org; 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=aRT5ReX6FfNpi8sInY8Erna9AcoUcJ+9OuBKDiXG1pU=; b=ZYvc565Ov5sPmas60DlESQLgkhQ2oQL+fMrxUUfdFbulH7qvJ+x6kELuo2YRSoOAzU 823JwHPCfhfsRojqhn82kdMMEhpX3zN+DmzyPuXHiGeuDSKki528ORXRL+goqF/8DVFW NzccURbvqNPbztkmKFMZRmsNhasQF2ad74RIpbZEzHPmm+0o9SSaNn98qTdHpDtBrkXb MOqKjz/1T5/W94fGwHtSvp508qJOZloSZxqlbowyX2ZTFuYdkcvR07Iia3kqpWTcw8F8 mdC4P1iBzu/Su5onPah6ppZ4G4qYWtXrnyFRcFXVOpUC7XlrJkB6/eQU+z789gi9UxsI sNnA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1713999088; x=1714603888; 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=aRT5ReX6FfNpi8sInY8Erna9AcoUcJ+9OuBKDiXG1pU=; b=EM5t++AnWy0vzohuZumXWd6njQ1jKKb+HQzCURisdgpZbiUZeIoTm1QxeDxNf17UOQ MF3LGy7dc4uAmTBgoN8Q5wnOltbQXRG/l+Y+96vlHFmZDbzocoWl2RUBe5jbYimv5AyZ j7mE3MR51UjTHcfE1LOGxP4IyoMZZO1uANLgrOwsq/kPSnB9DrdCrajLvECUM9a5Ndni 9dgI1e2VTladRqI4Lw4krTNsO5fBURp8VyG2PuY+dkbYgI81Hj9XgPeALoTSaGGMcn3w jv8rCZtGacaDe9wS9srDywaswcy8F9idbWVptzGxpWDr6FNi5hngAdm9rpA8iCpyWIua VkfA== X-Gm-Message-State: AOJu0Yw+dSeez1xWj/NxVwKBMvNp4NCidkVr/x+JCYxWaoWCPmFBmdvn D8OblTAAALnRRASB+qeRvBbiw3P/irDts/ke/ncXSL9Zig7oVnhN0xacqSvd5nQnmhPEZUWcjp4 O X-Google-Smtp-Source: AGHT+IEzRWpJMH9y3KYChUNeXKu5ktJl6zedosbWkGaGEIqAm0WgOWcIEYfAyx4D2PK0lM+q4kaVPQ== X-Received: by 2002:a05:6a20:daaa:b0:1aa:5e75:d31f with SMTP id iy42-20020a056a20daaa00b001aa5e75d31fmr4467385pzb.16.1713999088291; Wed, 24 Apr 2024 15:51:28 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: Michael Tokarev Subject: [PULL 3/9] linux-user: do_setsockopt: make ip_mreq local to the place it is used and inline target_to_host_ip_mreq() Date: Wed, 24 Apr 2024 15:51:17 -0700 Message-Id: <20240424225123.929152-4-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240424225123.929152-1-richard.henderson@linaro.org> References: <20240424225123.929152-1-richard.henderson@linaro.org> 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=2607:f8b0:4864:20::434; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x434.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: 1713999180618100001 Content-Type: text/plain; charset="utf-8" From: Michael Tokarev ip_mreq is declared at the beginning of do_setsockopt(), while it is used in only one place. Move its declaration to that very place and replace pointer to alloca()-allocated memory with the structure itself. target_to_host_ip_mreq() is used only once, inline it. This change also properly handles TARGET_EFAULT when the address is wrong. Signed-off-by: Michael Tokarev Message-Id: <20240331100737.2724186-3-mjt@tls.msk.ru> [rth: Fix braces, adjust optlen to match host structure size] Signed-off-by: Richard Henderson --- linux-user/syscall.c | 47 ++++++++++++++++++++++---------------------- 1 file changed, 23 insertions(+), 24 deletions(-) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 59fb3e911f..cca9cafe4f 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -1615,24 +1615,6 @@ static abi_long do_pipe(CPUArchState *cpu_env, abi_u= long pipedes, return get_errno(ret); } =20 -static inline abi_long target_to_host_ip_mreq(struct ip_mreqn *mreqn, - abi_ulong target_addr, - socklen_t len) -{ - struct target_ip_mreqn *target_smreqn; - - target_smreqn =3D lock_user(VERIFY_READ, target_addr, len, 1); - if (!target_smreqn) - return -TARGET_EFAULT; - mreqn->imr_multiaddr.s_addr =3D target_smreqn->imr_multiaddr.s_addr; - mreqn->imr_address.s_addr =3D target_smreqn->imr_address.s_addr; - if (len =3D=3D sizeof(struct target_ip_mreqn)) - mreqn->imr_ifindex =3D tswapal(target_smreqn->imr_ifindex); - unlock_user(target_smreqn, target_addr, 0); - - return 0; -} - static inline abi_long target_to_host_sockaddr(int fd, struct sockaddr *ad= dr, abi_ulong target_addr, socklen_t len) @@ -2067,7 +2049,6 @@ static abi_long do_setsockopt(int sockfd, int level, = int optname, { abi_long ret; int val; - struct ip_mreqn *ip_mreq; struct ip_mreq_source *ip_mreq_source; =20 switch(level) { @@ -2111,15 +2092,33 @@ static abi_long do_setsockopt(int sockfd, int level= , int optname, break; case IP_ADD_MEMBERSHIP: case IP_DROP_MEMBERSHIP: + { + struct ip_mreqn ip_mreq; + struct target_ip_mreqn *target_smreqn; + + QEMU_BUILD_BUG_ON(sizeof(struct ip_mreq) !=3D + sizeof(struct target_ip_mreq)); + if (optlen < sizeof (struct target_ip_mreq) || - optlen > sizeof (struct target_ip_mreqn)) + optlen > sizeof (struct target_ip_mreqn)) { return -TARGET_EINVAL; + } =20 - ip_mreq =3D (struct ip_mreqn *) alloca(optlen); - target_to_host_ip_mreq(ip_mreq, optval_addr, optlen); - ret =3D get_errno(setsockopt(sockfd, level, optname, ip_mreq, = optlen)); + target_smreqn =3D lock_user(VERIFY_READ, optval_addr, optlen, = 1); + if (!target_smreqn) { + return -TARGET_EFAULT; + } + ip_mreq.imr_multiaddr.s_addr =3D target_smreqn->imr_multiaddr.= s_addr; + ip_mreq.imr_address.s_addr =3D target_smreqn->imr_address.s_ad= dr; + if (optlen =3D=3D sizeof(struct target_ip_mreqn)) { + ip_mreq.imr_ifindex =3D tswapal(target_smreqn->imr_ifindex= ); + optlen =3D sizeof(struct ip_mreqn); + } + unlock_user(target_smreqn, optval_addr, 0); + + ret =3D get_errno(setsockopt(sockfd, level, optname, &ip_mreq,= optlen)); break; - + } case IP_BLOCK_SOURCE: case IP_UNBLOCK_SOURCE: case IP_ADD_SOURCE_MEMBERSHIP: --=20 2.34.1