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[98.147.7.212]) by smtp.gmail.com with ESMTPSA id lc24-20020a056a004f5800b006eaacc63435sm3579811pfb.173.2024.03.29.15.20.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Mar 2024 15:20:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1711750845; x=1712355645; 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=HtUHg09UOjxxYBJJEpdXT1anxY6jjxQxzEq5yXQbAXE=; b=yBJGaOdrjxNQNBorSTQqmPpBX4T4sd3LXvM2cI1rJX+8fCHqOMYiRWupAHDFL1+lJB vYukkFzzMz/qP2Ht9Rn6HF0LD1zg29tyoNxlVmyk27bQgAbV7w116SyLpiCs4qICIkru a//h8CKsi+/oZRk/6JKFTw7LSrqnN2PvvFXRBGSG+ibN6YVr5yyqVpDDQ3Z9Km6i0Esr zsnvevkFBoRegLZV2qOFw16vgIsTBHhKajHR7AjrT4J9SWXhPitXDU6bmxc9fJ8pfxIF 2Ph2e/9RCeSBSaWIr9drZo06fv15xcXn6/F9N0pg8bTGXRxnp6lOvSQX22+QwtHWPWPF feyw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1711750845; x=1712355645; 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=HtUHg09UOjxxYBJJEpdXT1anxY6jjxQxzEq5yXQbAXE=; b=uy+aVsv8+5hMTe6B3KLjT5T1xAp7D4W8XNxY2E3sCf57xjTngGI9QUroVDv/lLIo3P smL7uxHtYh+ucJb1Qb9npY8vaWOp8ops/ImqaYz2THsdX+bGdMo1XNzHiPXspWGwhT+Q vmDiZ0G1uy0ecRx5IGTxzUQfBZy5TURWSHd+l5iQlRoqnxxfQn9azIuPNnuJSkHvjC6c TJ1/ZXgXEzcazpPENqL4/PBiGPKAbHpLlxnfuGznJ5+HCO+CbqkbLXqzyTQr88HBaYqb 5GnSPHcmfjlhIvdVPjelu4zZ7MT4hnB6YP3BdLMNGHCKzMOMktDAWfVblthkIWX9o9oB XLMA== X-Gm-Message-State: AOJu0YxAI7oilD/G6bru9aP7lD3sfvM0LdL3dClBVRBKr6lfVM7Amd5v PmTDnwRj7I0Bz/i3V+EbA+2uIqEtOMpM9qnJLp5TWOMXTnRTDnr8dYUOhRBvwoL2RHvEuIXI4co o X-Google-Smtp-Source: AGHT+IEjgiztimZl+umzBvIB4PXvgwmlAsCEtEh0MwE+tdRYfYwCpG08/cOs52K0LU9o9F18Mh8m3Q== X-Received: by 2002:a05:6a00:1910:b0:6ea:ca90:3459 with SMTP id y16-20020a056a00191000b006eaca903459mr3588812pfi.32.1711750844955; Fri, 29 Mar 2024 15:20:44 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: Ilya Leoshkevich Subject: [PULL 3/7] linux-user: Fix shmat(NULL) for h != g Date: Fri, 29 Mar 2024 12:20:33 -1000 Message-Id: <20240329222037.1735350-4-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240329222037.1735350-1-richard.henderson@linaro.org> References: <20240329222037.1735350-1-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+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::42c; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x42c.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+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1711750931521100011 Content-Type: text/plain; charset="utf-8" From: Ilya Leoshkevich In the h !=3D g && shmaddr =3D=3D NULL && !reserved_va case, target_shmat() incorrectly mmap()s the initial anonymous range with MAP_FIXED_NOREPLACE, even though the earlier mmap_find_vma() has already reserved the respective address range. Fix by using MAP_FIXED when "mapped", which is set after mmap_find_vma(), is true. Fixes: 78bc8ed9a8f0 ("linux-user: Rewrite target_shmat") Reviewed-by: Richard Henderson Signed-off-by: Ilya Leoshkevich Message-Id: <20240325192436.561154-4-iii@linux.ibm.com> Signed-off-by: Richard Henderson --- linux-user/mmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/linux-user/mmap.c b/linux-user/mmap.c index 4505fd7376..be3b9a68eb 100644 --- a/linux-user/mmap.c +++ b/linux-user/mmap.c @@ -1354,7 +1354,7 @@ abi_ulong target_shmat(CPUArchState *cpu_env, int shm= id, if (h_len !=3D t_len) { int mmap_p =3D PROT_READ | (shmflg & SHM_RDONLY ? 0 : PROT_WRI= TE); int mmap_f =3D MAP_PRIVATE | MAP_ANONYMOUS - | (reserved_va || (shmflg & SHM_REMAP) + | (reserved_va || mapped || (shmflg & SHM_REMAP) ? MAP_FIXED : MAP_FIXED_NOREPLACE); =20 test =3D mmap(want, m_len, mmap_p, mmap_f, -1, 0); --=20 2.34.1