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([203.30.4.111]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7127af1bd5asm179907b3a.177.2024.08.14.18.06.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Aug 2024 18:06:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1723683965; x=1724288765; 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=+O6tEfQz5lUPeGvFYdt3re9qjwA4R55lMLBHq/WO0OE=; b=Cx3vdN45dclVWn0S4nDHLCdGCbb8ADcx4DlHBz53F9ZmDff/WMnsR1XIONmCEEKtXg E/0xPCKLuXuaeOuLv8sJ2n/xsvOx0sgKLUKMHXwLYYEf0WfRatp4l5xQnONToezf8+Ia +2srvJ9sAZsQPn91WAg9ba+jgBiHzL+H1aMpYW+9o3zG60ik7iDuIFNf4mjmdx9c9NUr xb6+Q4ENv5VHuiMqGJ3C0lHxGGN0IHh6LHyWQP94m9FhFmpcOlADLbo7HmQOfWYVH8Ro YpRnrIBBtX54PAz3R63H/TpVuQNQad0EIKcY87j0X2aVFzdU2spWf0V6camu4T4/+VFl PxKA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723683965; x=1724288765; 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=+O6tEfQz5lUPeGvFYdt3re9qjwA4R55lMLBHq/WO0OE=; b=LtNBt/WHZjpXaMYnd6WviAnoQo+bnJQqZKt9kYd+kqrjy9/7yB5V1VeYZ9ZfaH8q2/ Gl6wMXftV/TMgZXi6pDLp0WcEAGZrwz56hKU1AJOHbpvYWZ32v9m20haQgtU2FtFn1Gb pgbPlaUQP/s8EKFb3+/il982xc2VVVXTTyFJclJU6cIINGWocBhs5kTquUzU1LyjWRxF 2VTLvZkR6x/usAHhPLB3HqTPiMfBMF0+bnvfti2BNgq/IEQvcdYlL+pK6aV6Z9aDc6ht GlE50Hoaow4qByZexgO1+zdg2JfiMf03CmVodATvmBUVTiOFw06fK3neXCYw/HHFhU31 7TIw== X-Gm-Message-State: AOJu0YzeM/Fb4mWO7yQhOcRM90MptYvA3dOQGlUAvg+8vz2j5n7ezcUI dMF8/PwhemGSnJsklWbXmIOojT8BPatKLe0Sjru96oic8ZIVvVanfaVyBEyChsqw5pWnJTQwuKf E X-Google-Smtp-Source: AGHT+IH5Bz3i3yJtiZTSqgq9q4NUtBuE4T1IXiAcPuoJNzP2KyzLalHSM03laC+l/1dBPv3VKL2ggQ== X-Received: by 2002:a05:6a20:d493:b0:1c4:9e5f:c645 with SMTP id adf61e73a8af0-1c8eaf54179mr5900839637.40.1723683964474; Wed, 14 Aug 2024 18:06:04 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org Subject: [PATCH 1/1] linux-user: Preserve NULL hit in target_mmap subroutines Date: Thu, 15 Aug 2024 11:05:56 +1000 Message-ID: <20240815010556.535100-2-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240815010556.535100-1-richard.henderson@linaro.org> References: <20240815010556.535100-1-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::533; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x533.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, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable 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: 1723684028599116600 Content-Type: text/plain; charset="utf-8" Do not pass guest_base to the host mmap instead of zero hint. Cc: qemu-stable@nongnu.org Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2353 Signed-off-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- linux-user/mmap.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) diff --git a/linux-user/mmap.c b/linux-user/mmap.c index 4d09a72fad..6418e811f6 100644 --- a/linux-user/mmap.c +++ b/linux-user/mmap.c @@ -560,9 +560,13 @@ static abi_long mmap_h_eq_g(abi_ulong start, abi_ulong= len, int host_prot, int flags, int page_flags, int fd, off_t offset) { - void *p, *want_p =3D g2h_untagged(start); + void *p, *want_p =3D NULL; abi_ulong last; =20 + if (start || (flags & (MAP_FIXED | MAP_FIXED_NOREPLACE))) { + want_p =3D g2h_untagged(start); + } + p =3D mmap(want_p, len, host_prot, flags, fd, offset); if (p =3D=3D MAP_FAILED) { return -1; @@ -610,11 +614,15 @@ static abi_long mmap_h_lt_g(abi_ulong start, abi_ulon= g len, int host_prot, int mmap_flags, int page_flags, int fd, off_t offset, int host_page_size) { - void *p, *want_p =3D g2h_untagged(start); + void *p, *want_p =3D NULL; off_t fileend_adj =3D 0; int flags =3D mmap_flags; abi_ulong last, pass_last; =20 + if (start || (flags & (MAP_FIXED | MAP_FIXED_NOREPLACE))) { + want_p =3D g2h_untagged(start); + } + if (!(flags & MAP_ANONYMOUS)) { struct stat sb; =20 @@ -740,12 +748,16 @@ static abi_long mmap_h_gt_g(abi_ulong start, abi_ulon= g len, int flags, int page_flags, int fd, off_t offset, int host_page_size) { - void *p, *want_p =3D g2h_untagged(start); + void *p, *want_p =3D NULL; off_t host_offset =3D offset & -host_page_size; abi_ulong last, real_start, real_last; bool misaligned_offset =3D false; size_t host_len; =20 + if (start || (flags & (MAP_FIXED | MAP_FIXED_NOREPLACE))) { + want_p =3D g2h_untagged(start); + } + if (!(flags & (MAP_FIXED | MAP_FIXED_NOREPLACE))) { /* * Adjust the offset to something representable on the host. --=20 2.43.0