From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-3.1 required=5.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FROM,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 29369 invoked from network); 25 Jun 2022 12:57:10 -0000 Received: from mother.openwall.net (195.42.179.200) by inbox.vuxu.org with ESMTPUTF8; 25 Jun 2022 12:57:10 -0000 Received: (qmail 20428 invoked by uid 550); 25 Jun 2022 12:57:08 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Reply-To: musl@lists.openwall.com Received: (qmail 20393 invoked from network); 25 Jun 2022 12:57:08 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.ca; s=s2048; t=1656161815; bh=7awdXQ804ojsPq7vZgFUE1lYrxpp4MFjwvzOOb9D5Jw=; h=Date:From:Subject:To:References:In-Reply-To:From:Subject:Reply-To; b=EWsrr+qNxCpnThMORAWoqspH+JqJCqHK5gn8f/Ll0OQpDeMMDb1Llb3PwSzXvpe7DW23Hj2oWZVMXOkdB/sSvN1nedJvW1negqoqE53MYqIJLBm0CgW1/X4dGHLFmcsUmJfBhgLTql58dTLKebKRoyJqZMarwJe/DBu1XW8hpVIGwK9GJ79H7/Q+JaliTuNii9uHyB1WU1np14EfLG9n6ES2M34mn71O4jodcJXALWxoWvuBx5XFzD/MdhHRmnZZjy5BgDL1VojQxrdXYTusyP8JK1oJNcMLpoeu0Kpe1SoBM/KNiOJ71Ohz7WNO5d/eoQFhtTf+DqGHoiKMDafLjQ== X-SONIC-DKIM-SIGN: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1656161815; bh=7JcnjqgSgHCvyPbVUYzJA5do38RoZ4N+l841HAC8OQb=; h=X-Sonic-MF:Date:From:Subject:To:From:Subject; b=gCJoSELvzX7iewh4a01Jr58z1nQUun1hT8j14XyUtowNoQDpgdjPAKSBGgPNgo2i3a8V40S0dj7sLuDaKXqa9w/2kmdQi88t2B9/gdjKHsiiZ1CfQbBNi4RQuQT2ogIWFsZ/vcJGAmvb6Fx2bUZRER7aaOLqsA3OUatlK8Sj53g53L0chdoTfc/w83dafcMs3Pdk2BFa4QnMVeJpskmqeYD6LTrJVX5f6Z3vH+9Q8f4zlj9CL/aVop1IcZZn49TOcimaoM1UrwD/KiiR8hPXAlutAn+4U2ctF5Gy+KIuGjE1UzuGmqp1if77BHVIwz0OqslLWcHiyGI7uO5eu9SJhQ== X-YMail-OSG: ZMsEg1QVM1l7WONSMKkEhVHd4nrfF6u2wxJE9qug.0HYiEzxzF6icoGr4oqSYEj QkgQFmpx0yZKZkGixjRDEREI41Hv73tpMUUVipyywCeBxzm1MFxTlF.tydQByUQsLLHspmNHpMTx Lchv4YTHVgXFtSGNnH50R0y3UhwWbQD_PWzz.mI_vPkj1DWzzR0gQFDH8Ga7gYM7vcA0qeFN789h atcGB8ASCI5i9XGds8JvEL.x.E5s9XGS0jH__72iGklszWqSfGtShE6I8Q2mJpzZvLQOHHQcvcYg Mzg6fOXjYktskH2kRubKc9PfggMw22cV6YJKZK_WXcud1UZaY8mycL72A8z.QRW9t6FakThTbttQ FNFPO_v9zDZN35QYDo2tCHXrNde4l6gJq2jBdlgYwGHMYL6p_rG71O_nVVewZI0bWqfGShZIy3y_ _lPbNpub.6Al8fdB4HbBVFipDUW6VS1x9Z6ZNY8HtXhWjhIL3JJWwpIZFtBop3v8nfrnCU3Y3X.1 RjZwpNIQx6bjsL7vLc6_kgKKwpvSDjQbIQ_Q9yvunnwi7DiG5qaoQIR4ub020h4gz3WC23iRDw7b vEm9f1sIqFedkm6dUoHWs3b17Tc270MQ2OX7VwxGAySrdl..yPs.EsioHg7NSq0ouFjfFLQBs8YP TO0_aGNfNz7RYbPUPszJtDulU4jbfW54GAJ1CqG81trkG0s9vLljAXDVAHfjoQGX6ycSPpFt5dxk MowmE7r4skBx1.6.o31hXJQf43ZvnfKrY_VT82Zk3WEdDb_zaT.0AIUOSHOXzq16zGBNFK.R.qL5 EZgTkH1hJtnwWhNSLERwSY3eGPpyCU_wIyaDPXrQ72PJn1AFN24x0tmpRimxx02Y__MEWoe3TlvZ BknZK_7B1zTujVYKhDIVPGt_u8DbGyHUGdkCWBIeM90UCBG_CzTgAaR6x5FmuZ0VZIYXvCAurG7T mBrsP9N0Ja8yvEBlH3QcenNtUEkf72EHl5dp02VbLuJWIAb.XaMqiGU7LCvkd21lYUoa2XHaRkmI kkItSBeGuhXPUkPgW1.VehLf6vD10_Otdpny5S.cVKtVpksqTOEG0g.kRwcsuqmNnhixEAScTNyE te8IMuC5sxPCHDUExvIBuGyaQgCB_bIaCGpkxOfQi5etLZnOb.h.TxgykjUfAjkg3rxKDfOuSsfW S10fvPqQyflbNNR8MrB_k587T6ZLUmfviC5Mwao0w4rtKQeII5roPCsIEMcWrizzt3a4E.knKXBd eT6eljZ.YN8ZqtdQh6f8D5LC.EbiN2PKIlFPNFonUNhvYnG.QJyrxOqlqnRrcdZnXZsX_N_JK8qj suDhCmn83Pwq1iWXzfvjf0fsrkBCFLXfwV4xpj3gDGdYHaNOXabnDH0YQGrYjs4Is1y6RXJc7Ep. UQNCFvN61npx7dl0lzQyCaTuqhff7F5reYh1jKsMVOhycGHvI5FmskTNpabzhO5IELMtinJvUpij w9vK8a9xBL6eYAMxLu76z3BMzLxJUjz9PuWUKy51Xdh0L_tm7hn5RhILErgrgCEqJLjiOJLW8ClA epDdsWVxtVFBfgnRGlwTZ.26DRcflqdhN1svhKcRiCwDEtZNaCP_fkZhvp4GIpIIiGLjVZY5TDTa DnkXh1NkpCjwdk.TgpMEnch6GsIbpRKdD0EN5_aNPARaKwCuX_gt0Is_wMcoFmJLUjYBWPo6OHzH bQuwLF1HgD9W5iqoK4a8wepsR0bAJLww_YRrtQEKT__O.eC5lpsyqTcl9Te7fCmJxoVyksKicoDk RmdP7Go5Ii9yAnKhGzLDdWj7UKG1UlGPMNZzQ7EKcItijwYSOW_GT73a..b5JAsGEG7QArSsdcBI K65fDCTBXc4XE4Ja.cqLCf0kqRCbWU8ln7wfm9z2Zdt.EXNT6iMSRfdYGYSFNUZFLZL6sdkv4SBd FQ3T7HOuaYnpwjHm.M645_sMr2w4sbl00I.Bs7vuxIIhV8NL5Jw.zOX2bt71ebT7u_OtS6u5wGVi v7POiCSMyUIiQA.yu6KHbyT3.wXA7Xx_l.ehup9ZoygNWOZZaTn7e4Sbd3V7CrM5b6yf2GWfQsG7 R0URE7fQw6x3sXgvwX_J4c3eTBdKgy0u3L2_p1Wv6vRUDG4u8WaKYiQA3kKvwFAg.nsanThYqZsQ NJWiEfIyE9n2ci00tywf3ue4hxY_HoG1cLLrmTV6Jt61HwHmHUShEwez2y4KA__2hu_QeMpWXF7U 2J9kdPCRYyhDFsXMxgL2IQQFCJkyVUNngu95NCg-- X-Sonic-MF: Date: Sat, 25 Jun 2022 08:56:46 -0400 From: "Alex Xu (Hello71)" To: musl@lists.openwall.com References: In-Reply-To: MIME-Version: 1.0 Message-Id: <1656161421.nztip0vma0.none@localhost> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Mailer: WebService/1.1.20370 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Subject: Re: [musl] BUG: Calling readdir/dirfd after vfork will cause deadlock. Excerpts from Nick Peng's message of June 24, 2022 11:40 pm: > Description: After vfork, calling functions such as readdir/dirfd may > cause deadlock. GNU C is OK. This is not a bug. TFM: DESCRIPTION Standard description (From POSIX.1) The vfork() function has the same effect as=20 fork(2), except that the behavior is undefined if the process=20 created by vfork() either modifies any data other than a variable=20 of type pid_t used to store the return value from vfork(), or=20 returns from the function in which vfork() was called, or calls=20 any other function before successfully calling _exit(2) or one of=20 the exec(3) family of functions. It may happen to appear to work in some cases on some libcs, or kernels,=20 or architectures, or it may deadlock, corrupt data, or cause demons to=20 fly out your nose. Do not use vfork in this manner. Avoid using fork in=20 this manner either; that may work in musl 1.2.2+, and appear to work in=20 glibc (but sometimes randomly corrupt data), but is not portable to=20 other libcs. Alex.