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([203.30.4.111]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2d1c9c9d745sm9968126a91.28.2024.08.13.02.47.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Aug 2024 02:47:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1723542422; x=1724147222; darn=nongnu.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=+O6tEfQz5lUPeGvFYdt3re9qjwA4R55lMLBHq/WO0OE=; b=QOH0tPjm6ulWxs0MFSjc2jHZS0HlB80bWRpjzICc3CCay2lhWSEZQDplbLwSR00cHb XEOPN/4DvdcDxCHSd4ChAG5CCwqSFsaOFXtw2XeAZIEv0Ih7mkmYsRzKxW6HBted9cPt RFZ2kSp8h4qvOTABMilIwXQgbxLZRqbOh98wQ3IJFKV9WGqPhjYvTi/RZUZB0217CTdk J6Qea8Iyrf6hrZd4KY5BzpVp+o+iGYp6BssSpThF+szt8PzX1sAFTTCmrSiyy5AgIUWG etnDBjEYUpx8syut1dwQcn/xzFERXwx4jP5mgY8EnLNGzVWOwYAQcjNmi9P/WoZ4LU1C UZ9g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723542422; x=1724147222; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=+O6tEfQz5lUPeGvFYdt3re9qjwA4R55lMLBHq/WO0OE=; b=ALiNZqacSjqjPdUhaXO+jEKf20aiZ2CnU6MK5KJ7NWDEz//NPIDNnhcoWuj/cDoIAF 2A99UaQv4ZdXc/LqeYsr8tm3xhL+iCedN40FW5X4OAQ7etyvTqkgO6rmAMtBuAg6mnVL 5iiUzGVQgs1xtcPoD00EVLLok6DRPEGTBON0PkyOe72WciiSR54BKThwy0sTInJoUPCR 49BXVUCMZ3xgBnWqyrrlu5yxCHRAdQcgxjLOyA6bsqtVUtj7rPyUrbBHtrPwVejWePlj vmv2atHVRTzwBO3qGzfxClvyXRw2atY/gSkJ2+DmyqGmpg7myNNyKFNlad+2rIuSCIas olOw== X-Gm-Message-State: AOJu0Yy0i00USh25nnHhZUEEJgJ0+HvYobGdbuds41VuBsATlSXAHysJ QS7n3bneMsZqvp78Dk34OzPkZh523Hyi7M1NTqz3hEZvaMn+KrPqGkE/0cFh5uc1i/ANluxtl2z Sv4s= X-Google-Smtp-Source: AGHT+IHAVj81WnOVBpXmwzETfNPUF1KfNnB+MoOdNVjqNvkNtPaV038Jh4wH7X41VPECybMtLQlWkw== X-Received: by 2002:a17:90b:b05:b0:2ca:5a46:cbc8 with SMTP id 98e67ed59e1d1-2d39265245dmr3356282a91.26.1723542422050; Tue, 13 Aug 2024 02:47:02 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org Subject: [PATCH for-9.1] linux-user: Preserve NULL hit in target_mmap subroutines Date: Tue, 13 Aug 2024 19:46:54 +1000 Message-ID: <20240813094654.306430-1-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 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::1033; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1033.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: 1723542489061116600 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