From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out162-62-58-216.mail.qq.com (out162-62-58-216.mail.qq.com [162.62.58.216]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0C51920B1E5; Tue, 18 Mar 2025 11:45:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=162.62.58.216 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742298311; cv=none; b=WEUOBr6vuJfUYBHrOt6ugQVl49MqqHEH8e0SIL6SzNonrIbpORtDc3ZbqxAJxwjNCbD0fs/ljXb+M0r5RUVKjl4NZbgtXYkqoEKUHSyq42soWMxBww39R8BU8IKo6fYaS2BO86vVKz8OesCepEuLLumgA6M/ulnHm4j3L91MwiE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742298311; c=relaxed/simple; bh=djZLuLhFAbfsqGXJcK9K1IHjemzYE2KVEh60/L6iSm0=; h=Message-ID:From:To:Cc:Subject:Date:In-Reply-To:References: MIME-Version; b=SGXI1P8rCgrex1WQEIe7Bwgoe/g22D0LFRG14Onota0IGmVnbzPP1UwpD74MeRe5pQSVMm6e9vwveQ5dEcPaKyTed3G00dCNRdnQSbkZJ9E6CMiRUIGflbb0cKPMlcidudnLPknsr+hiaKFsNUxDXKizrm/2Q0qrJgpPtaJ0hvA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com; spf=pass smtp.mailfrom=qq.com; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b=Ae/8YiK6; arc=none smtp.client-ip=162.62.58.216 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=qq.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b="Ae/8YiK6" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qq.com; s=s201512; t=1742298002; bh=DVBkZ4W/fcutXgYsWgqDMgU4Qx/25LxZQa3j0kVZ5cw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Ae/8YiK6TD3G6B6JhATj9WSdfxRvk9a6rpfaIIDCax11BGSn/XdBBktsOmNlsx/no hrWLgy9v3BWewBDAB4QAE47AWNuNnVsCK2reYWBHj3z1K0sY2CsvdABOk82dByq86x V8+caKIWPosDJi5TCWqe9PV4cfBqas5pr+wh0FBs= Received: from pek-lxu-l1.wrs.com ([114.244.57.157]) by newxmesmtplogicsvrszc11-0.qq.com (NewEsmtp) with SMTP id 8663962D; Tue, 18 Mar 2025 19:33:38 +0800 X-QQ-mid: xmsmtpt1742297618th3pjxkuq Message-ID: X-QQ-XMAILINFO: MmuCfgcSBfHxAwVHfqzUH19oS9JZCF61tXLCvTwE3naizZ44lnfbpY1y7uVtz1 A4DkITyEEzW2cWLISCm4ru5npCjznHUnRL5d+B87qS3+BzuAIxhyK6X0bZjyHnMrVnWmP9Q4ejdf uTSka+QzUhnw2ED3fQdsLxwxk3aF/9Y6uFNaP3UHoQ+LYnGx2V2AJXLz/ee9vKk/DfLOO9o7cKuQ xuuV4eqXoibKiTGv0Cl4mYnRvkK9MwYzohHy5uI29r+3k9yV3JTImv1lN7Y8RfdSYYAvqHJoLrKa 0DuCId+ybwpST4C0XHgjDDZ5IpmVzuRpJPyjqDyKOoq9CwrW/Bye0TeXszVL/RrpUMTbuhBpyZ3M vttsXy5SZ+Yxh16td5oeUIR8/O+XZeiPD5SNKn8EB5SmaKrasDVsLpifSc36KFUCd6O7LUT7kXkk SZVMMgBVx8rAf4weKT/YX2BG9Xers+pu9BP3woV4a/61Ov7ZwCBrfahCKvZV2UkxIOEjNZ5eFWvB eRVHy0LC4j/rB1wm6mUhXEklaPImnwDg7gX1mtDaG7XLrQeN1sTjaVgW2eHeLCzGU+FQXDMdtTb5 96f+V/puqoGPI5pfHbIfjHBCqHkAp5lB+YX6+f6z+wYM8+qIFky6ZXKgiA4x7F2trLvrA5Ae6hwy NrUbmWQX5onB33rv9A+Vrp5FfuxocvIi7riJZ2W2JxSnvTBcDZKNsXPcklpsMr+26qR8nWMJq7/P LmA8GsFrxQCz5wL1FHtQKM+OyXCzpfJn2pLOqdyLxOZxDJLQylj8x/TQeO/MDrWeUZB8RRygUwUs p6PE3fgclswS3ez1nKsu9houc+z0J9hOt0hHDo0FOgzJATbFYnivlm+dnJiCjlHxZsLRKVatiQP3 lIahiUyKt0Zfaua5A63XE22rfz41uSsxYWR3lEAi4KB6tiBHcav1qLL5UA2MKSqg== X-QQ-XMRINFO: OWPUhxQsoeAVDbp3OJHYyFg= From: Edward Adam Davis To: dhowells@redhat.com Cc: brauner@kernel.org, linux-afs@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, marc.dionne@auristor.com, syzbot+76a6f18e3af82e84f264@syzkaller.appspotmail.com Subject: Re: [PATCH] afs: Fix afs_atcell_get_link() to check if ws_cell is unset first Date: Tue, 18 Mar 2025 19:33:38 +0800 X-OQ-MSGID: <20250318113337.3608413-2-eadavis@qq.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <2481796.1742296819@warthog.procyon.org.uk> References: <2481796.1742296819@warthog.procyon.org.uk> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Tue, 18 Mar 2025 11:20:19 +0000, David Howells wrote: > Fix afs_atcell_get_link() to check if the workstation cell is unset before > doing the RCU pathwalk bit where we dereference that. > > Fixes: 823869e1e616 ("afs: Fix afs_atcell_get_link() to handle RCU pathwalk") > Reported-by: syzbot+76a6f18e3af82e84f264@syzkaller.appspotmail.com > Signed-off-by: David Howells > Tested-by: syzbot+76a6f18e3af82e84f264@syzkaller.appspotmail.com > cc: Marc Dionne > cc: linux-afs@lists.infradead.org > cc: linux-fsdevel@vger.kernel.org My fix already sent, it is much earlier than your patch. https://lore.kernel.org/all/tencent_8CA5671E3C533638973237484A0874917609@qq.com/ BR, Edward