From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id CC8ACC02198 for ; Wed, 5 Feb 2025 18:53:06 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 5A0DE6B007B; Wed, 5 Feb 2025 13:53:06 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 5502E6B0085; Wed, 5 Feb 2025 13:53:06 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3F1A26B0088; Wed, 5 Feb 2025 13:53:06 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 1D9B86B0085 for ; Wed, 5 Feb 2025 13:53:06 -0500 (EST) Received: from smtpin14.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id A2D4C1209DE for ; Wed, 5 Feb 2025 18:53:05 +0000 (UTC) X-FDA: 83086788330.14.844D777 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) by imf10.hostedemail.com (Postfix) with ESMTP id EE2CCC0008 for ; Wed, 5 Feb 2025 18:53:03 +0000 (UTC) Authentication-Results: imf10.hostedemail.com; dkim=none; spf=pass (imf10.hostedemail.com: domain of 3j7OjZwkbAMg6CDyozzs5o33wr.u22uzs86s5q217s17.q20@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.200 as permitted sender) smtp.mailfrom=3j7OjZwkbAMg6CDyozzs5o33wr.u22uzs86s5q217s17.q20@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1738781584; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references; bh=qDYV7j+0Ng3pBdeYSpKXURozsltAjUJSfrXA0FKOfCI=; b=gEowKx2BhZYE8OXS6KGhKiUhVCDjmkgLb0JHklmXGyjgojFI+bQ9DSzBvX0irn1ND/R+8T qBw2ZMfn+QwPVRtjdC81FcvzKAm49qvdtco9Nk18AY5ACcDzFnEF0Zeq2gHqGFYEhzNBom Clx3eiTyEJ7Xhg7VLWnc/CX/ykLrFzY= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1738781584; a=rsa-sha256; cv=none; b=1ATIkDqPQhd/xyznYM0uoqaV2o26lcUOHXnJ50+Ul/tfG6JmDit82MOlzeLrrk3PosAn3A fru2GKP/CuuGrY7ZYWjfo/m7JICl3+2e6gsG4egeNscwiDgvOCcOIlvcrd4I0Vo83ogdkn zXZL9buzqKlGKftl6fsMQPCVnLZ150M= ARC-Authentication-Results: i=1; imf10.hostedemail.com; dkim=none; spf=pass (imf10.hostedemail.com: domain of 3j7OjZwkbAMg6CDyozzs5o33wr.u22uzs86s5q217s17.q20@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.200 as permitted sender) smtp.mailfrom=3j7OjZwkbAMg6CDyozzs5o33wr.u22uzs86s5q217s17.q20@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none) Received: by mail-il1-f200.google.com with SMTP id e9e14a558f8ab-3d052db03a6so496025ab.0 for ; Wed, 05 Feb 2025 10:53:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738781583; x=1739386383; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=qDYV7j+0Ng3pBdeYSpKXURozsltAjUJSfrXA0FKOfCI=; b=DX8Wpti7lELsHg3+jcFEKuhhFx15mhPAeQ4eIafn5TbWPVdYDpDjl40BtZXdgp/Sg6 49EHSEexSXUPj+Gyns5lCHFrJ5UKJAwhciIkN70/kK1ufIlNNVmYsSjQcj2Y5NhmilD1 cMqdKp6cweUSpWyrByfmKSpQ64wkIsSuDuz+okostm47pyymopPXtbs2hEUhETWGrmFf OZSn7NcV5D5GP3WVPtQDSr0AR2JuBKHCi11sFxcQkoSDhG48ltF3rHN5s6jfl25xCTRa biycEoGBO/gRHrikB8gGp6SYQQD1MhWI3FBB4AnNJ3VMX0JuH9GKdcLueOOaRcffr9si OLTw== X-Forwarded-Encrypted: i=1; AJvYcCXINFyP58qFGpCHLZ8oaWadu5YJaXBGBKHtF+lI541f2N4zEYYPAVamOvI2ie5U/wngDIznd9YaNA==@kvack.org X-Gm-Message-State: AOJu0YxRAYtBmsdlQzyZFYPE9piF/4ua2tSC3wip1igqCoLYj0SxUYOq YzEDTA4jNWoJ0CiekWmd8L4bwdi9hmXId0FZqmZxZLfNwEIEAoSyzSwgW+LGH2Y0ln14DveprNR MmDJ6JIIRr9dv+dWjrPjIRgvg8mN6FdJFRzeatZEFOJKwDr3WqGmXfHo= X-Google-Smtp-Source: AGHT+IEhJWeKOTmZ9PeHLjWCvfpb95n3CovTNjj5uKj5kahddtxpg7508wvgYjmxvMuvxjeEDXYHbYA+oqxj3rTamLCovc/dIMjw MIME-Version: 1.0 X-Received: by 2002:a05:6e02:218f:b0:3d0:2a04:1ce2 with SMTP id e9e14a558f8ab-3d04f917778mr32567125ab.16.1738781583104; Wed, 05 Feb 2025 10:53:03 -0800 (PST) Date: Wed, 05 Feb 2025 10:53:03 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67a3b38f.050a0220.19061f.05ea.GAE@google.com> Subject: Re: [syzbot] [hardening?] [mm?] BUG: bad usercopy in vfs_readlink From: syzbot To: akpm@linux-foundation.org, brauner@kernel.org, gustavoars@kernel.org, jack@suse.cz, kees@kernel.org, linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mjguzik@gmail.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: t8ya3kkhsen4zbacrse6psrq17gaynic X-Rspamd-Queue-Id: EE2CCC0008 X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1738781583-232095 X-HE-Meta: U2FsdGVkX19TTscVPy/hgkAWAWLZvOBzB/rDWFAMNcYnVXWBSDhQtbJGYdrN00BjI2ZpsmCb8Hx1v1zUUkguApEkC0svy88rSilKIjvODjic4cPOyWwC1lYwyZan1AkicQfjBE8HMHmB8nPNRLpykS9H3TDWDJcEYbvf3jrkS/QZYz7wSItwDo7CZ4+3kJKOSas8tYyPu6ud7pUfzXmaVY4lfZ1l8jL5wIL4Nel/puvTjCNWAEcfrHdwko4DAwL/ZdTiN1d6bfOyK/ALQgL1RoubVmj47Xn8AjjtUecZ6F3B/zl3DzTjrifZ76Wva7nKGj8gb/usMdPMMxBUGYF3tjU26dnoziXzAG8n2fcZoFJ7RJH3GnxiOG0EXfV6Ey7hRV5EXnfKm+d0IuoqxG4iefR/tgXxAVg7Hq0uFyhrqRuSLsaHOTYfISa4jYoeh/MsoDMqoMpv71TE3MnG23mAGXKcvP5lFokcN4BUgE1BV0znP279dTEwMm5g1MYDm988aCaCDInNN3Gmbx7AvJzketkyEy15R2950s+8ubCTum8wijiKszqGAD+7MYKbznzwaJkHAmpWysDjXWQisJ2Rg0aoFm08v9IPzME36DYZ/7xf96WOQ9GAcbJ65YKzGIXyo7fl75BvpoMhFkBtifyn7gWnZ6rHmQwqnvr2cWhGGdQdet5uqWOlcCwyFhYtorHODYzwLqa498MYDXrxVjrG3w46tvBjFW1otfelUzl4Ou+AOxPemG+cWqLG/+PpAE5i7qfeoMWMqaOEEAK/3VwfF3ByfvZ+7DLZGfGk7+FAX6iokSRau12lMzDPIMa22MOCFcpNPzdjyyOaXNhq3iEOGT7WrD5f1o5vXjjMuldeNyE7VFrdNR0FG9SgxfjfeT9vwY/a44dPbnLDO/JD772+sYJlLKse+mDFKDTGF/wzlSzjxNE4xeEmICMpMqot4LwOPnrTIRbp/8ZfbcYefo+ x5m1sLgg 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 0BhR7J47 YSzCDyY23jhg7ap24kRayV+ht+8UMU/K7PXTxIj2Wt5B+SY0mYJiUtwLgxyUPiNd3h2l3ZsRZHTb9Ul2uMoUfUTkcgaTzvATg+kCX5K/hWqLqgrMcyfU4zhPGXbN40Xr X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, syzbot has tested the proposed patch and the reproducer did not trigger any issue: Reported-by: syzbot+48a99e426f29859818c0@syzkaller.appspotmail.com Tested-by: syzbot+48a99e426f29859818c0@syzkaller.appspotmail.com Tested on: commit: 92514ef2 Merge tag 'for-6.14-rc1-tag' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1770beb0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=207eb10d2de1b054 dashboard link: https://syzkaller.appspot.com/bug?extid=48a99e426f29859818c0 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=16dde318580000 Note: testing is done by a robot and is best-effort only.