From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43441) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1edzs2-00075d-3t for qemu-devel@nongnu.org; Tue, 23 Jan 2018 09:48:20 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1edzry-0002MS-7W for qemu-devel@nongnu.org; Tue, 23 Jan 2018 09:48:18 -0500 Received: from mout.kundenserver.de ([212.227.17.10]:61908) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1edzrx-0002KF-Ta for qemu-devel@nongnu.org; Tue, 23 Jan 2018 09:48:14 -0500 From: Laurent Vivier Date: Tue, 23 Jan 2018 15:47:59 +0100 Message-Id: <20180123144807.5618-6-laurent@vivier.eu> In-Reply-To: <20180123144807.5618-1-laurent@vivier.eu> References: <20180123144807.5618-1-laurent@vivier.eu> Subject: [Qemu-devel] [PULL 05/13] linux-user: Translate flags argument to dup3 syscall List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Peter Maydell , Laurent Vivier From: Peter Maydell The third argument to dup3() is a flags word which may be O_CLOEXEC. We weren't translating this flag from target to host value, which meant that if the target used a different value from the host (eg sparc guest and x86 host) the dup3() call would fail EINVAL. Do the correct translation. Fixes: https://bugs.launchpad.net/qemu/+bug/1704658 Reported-by: Bruno Haible Signed-off-by: Peter Maydell Reviewed-by: Laurent Vivier Message-Id: <1513351080-25917-1-git-send-email-peter.maydell@linaro.org> Signed-off-by: Laurent Vivier --- linux-user/syscall.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 39553c81b6..41ded90ee6 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -8490,11 +8490,19 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, #endif #if defined(CONFIG_DUP3) && defined(TARGET_NR_dup3) case TARGET_NR_dup3: - ret = get_errno(dup3(arg1, arg2, arg3)); + { + int host_flags; + + if ((arg3 & ~TARGET_O_CLOEXEC) != 0) { + return -EINVAL; + } + host_flags = target_to_host_bitmask(arg3, fcntl_flags_tbl); + ret = get_errno(dup3(arg1, arg2, host_flags)); if (ret >= 0) { fd_trans_dup(arg1, arg2); } break; + } #endif #ifdef TARGET_NR_getppid /* not on alpha */ case TARGET_NR_getppid: -- 2.14.3