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[98.147.55.211]) by smtp.gmail.com with ESMTPSA id lo21-20020a056a003d1500b006e5acdb5c94sm2399881pfb.176.2024.03.01.17.06.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Mar 2024 17:06:31 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Cc: pbonzini@redhat.com Subject: [PATCH 1/3] linux-user: Implement PR_{GET,SET}_CHILD_SUBREAPER Date: Fri, 1 Mar 2024 15:06:25 -1000 Message-Id: <20240302010627.12998-2-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240302010627.12998-1-richard.henderson@linaro.org> References: <20240302010627.12998-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::432; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x432.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=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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org The "set" prctl passes through integral values. The "get" prctl returns the value into a pointer. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1929 Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell --- linux-user/syscall.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index bc8c06522f..263b651cc5 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -6450,11 +6450,21 @@ static abi_long do_prctl(CPUArchState *env, abi_long option, abi_long arg2, case PR_SET_NO_NEW_PRIVS: case PR_GET_IO_FLUSHER: case PR_SET_IO_FLUSHER: + case PR_SET_CHILD_SUBREAPER: /* Some prctl options have no pointer arguments and we can pass on. */ return get_errno(prctl(option, arg2, arg3, arg4, arg5)); case PR_GET_CHILD_SUBREAPER: - case PR_SET_CHILD_SUBREAPER: + { + int val; + ret = get_errno(prctl(PR_GET_CHILD_SUBREAPER, &val, + arg3, arg4, arg5)); + if (!is_error(ret) && put_user_s32(val, arg2)) { + return -TARGET_EFAULT; + } + return ret; + } + case PR_GET_SPECULATION_CTRL: case PR_SET_SPECULATION_CTRL: case PR_GET_TID_ADDRESS: