From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail3-165.sinamail.sina.com.cn (mail3-165.sinamail.sina.com.cn [202.108.3.165]) (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 0FEE517C211 for ; Sun, 16 Aug 2026 02:17:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.108.3.165 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786846669; cv=none; b=fe/m+h3VLb1WDrEOlM8hM2Y70sZvM2uEsifBn/tFi41ypKe821DQXdpjkUTf+9dpkli/k0gUFUULLVfq75kWO87X/12ZfgbLvz2i0TNcOtn6KRs57BGJgYg2NM8GtKr/PWnbHgBnpv4OVqCKh4OHv410u0G+ehstsJPbz73o+Dw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786846669; c=relaxed/simple; bh=jbKk1ilVPm8/oAqV8GBBBi3A4CIK9lYF866jgwn71tE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LVqs/VERJ/CUn678fyfsqDOCEyd3aIVxFUmtDt35clM0VyMCnn/ZP+2n0BZQupcTJGg8zPCUNzU1OSOGt9ZKMFkxtv287k5SrU02OTDMnysbZH7kNvLIRSS7NppTwsXQpgbTlWTCu6laSgShN/k7i494sQAj+CBqK1qXQpclDp8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com; spf=pass smtp.mailfrom=sina.com; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b=b2yWlTx+; arc=none smtp.client-ip=202.108.3.165 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sina.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b="b2yWlTx+" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sina.com; s=201208; t=1786846665; bh=GUN+iHl2IGCxfpCt9mniRrNmUz+wBSr+nEIIeXHiekQ=; h=From:Subject:Date:Message-ID; b=b2yWlTx+LDBIzZueoisK14S6ReXcCxUXFAJbKnQwXQF3BDsZ0CHPMKEWfOjp7Qz3G d2HCpinnytxt6feCq/DNExlIJvvDa6wr5jtqVz3M8mLB8ir0boVLPICAPoAZ95d1Hq SdXQ8ZCsiKSWorfK/gt/YIWkfGZLm+HfWPqKmUgQ= X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([221.216.154.155]) by sina.com (10.54.253.33) with ESMTP id 6A811DC300002020; Sun, 16 Aug 2026 10:17:41 +0800 (CST) X-Sender: hdanton@sina.com X-Auth-ID: hdanton@sina.com Authentication-Results: sina.com; spf=none smtp.mailfrom=hdanton@sina.com; dkim=none header.i=none; dmarc=none action=none header.from=hdanton@sina.com X-SMAIL-MID: 3924706685366 X-SMAIL-UIID: E52F7793EFCD4456800DFAC367C471E8-20260816-101741-1 From: Hillf Danton To: syzbot Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [bridge?] KASAN: use-after-free Read in filemap_map_pages Date: Sun, 16 Aug 2026 10:17:32 +0800 Message-ID: <20260816021733.1177-1-hdanton@sina.com> In-Reply-To: <6a8060cb.5ca1970b.32aa76.0008.GAE@google.com> References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit > Date: Sat, 15 Aug 2026 05:51:23 -0700 [thread overview] > syzbot has found a reproducer for the following issue on: > > HEAD commit: 15ef2f78c49d Merge tag 'input-for-v7.2-rc7' of git://git.k.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=11cfe279580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=1d67342c314f228d > dashboard link: https://syzkaller.appspot.com/bug?extid=b72767277f29b6407083 > compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15cfe279580000 #syz test --- x/mm/mmu_gather.c +++ y/mm/mmu_gather.c @@ -358,7 +358,7 @@ static inline void __tlb_remove_table_on #else static inline void __tlb_remove_table_one(void *table) { - tlb_remove_table_sync_rcu(); + tlb_remove_table_sync_one(); __tlb_remove_table(table); } #endif /* CONFIG_PT_RECLAIM */ --