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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6A280E7DF16 for ; Mon, 2 Feb 2026 18:05:35 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4f4ZKT590sz309N; Tue, 03 Feb 2026 05:05:33 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=209.85.160.79 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1770055533; cv=none; b=dYc9o57XDwi5/owXSzSH1Xi3DbtYHC0Bt5Ga+HUltxul3ebSzzY/umAsO7PAnFjRS7FuDyIafXArIqUuKOAZWkb8fwIEv57tAW8HptaOIBmOeVBli1vpqXacrTR/LsQD0P08jMtLJ268dK14dWP6se2FKjQFBO74auoHVriye93/AHwzJN4WGa7Gxn9KWW2VijRDpMd9GL809g8LPGfB6kOGw7RZZi/TSDfinwYJ5A5+k7sySFUgouTUeKVh+g8OOZVm/gUDaElzmOdzwpnY2eVUx+1pzyR2Bs+7UkPUuS8FX5uhmb7FQbyl8/25lPFJY2HVDMldP63mHR4SliPGtQ== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1770055533; c=relaxed/relaxed; bh=2CYBvIOK9TzJ05c6sx0DJ6AmLW4gBCAz8kSfM8FzVRQ=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=l4Rtrv7TsmDl46j1YylBub5X1oOi7jGSaS2HhLgblOk5ThoVOeXfGLaRuppzotJE+d2Gxe8+JuXkIXQju6qrT1ECrjp3p8J0IziBaTF9+uR8xK+otT+Qjw37NUGA/hZq7bnqYDC/GAgiHNhyD2zbceE+VUTmCk4oLzSekEhLUQisI3YvDP6BmBmBolBSu+ydIk/1RRW6UkVZob7wyJ2xTLRRYkME7kxD6YCdCVDes8dH0mZeWzO9aRhEqRy60PtyXSSPv1HZaVo5U3mHVqDPqkSW6bmFJ/UPp3fFRq2lx8DCpnjhbbG0/0hocw0UNrgE5RwytFtBZQcPVh9CvRMQNw== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass (client-ip=209.85.160.79; helo=mail-oa1-f79.google.com; envelope-from=3aoeaaqkbai09fg1r22v8r66zu.x55x2vb9v8t54av4a.t53@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com; receiver=lists.ozlabs.org) smtp.mailfrom=m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com Authentication-Results: lists.ozlabs.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com (client-ip=209.85.160.79; helo=mail-oa1-f79.google.com; envelope-from=3aoeaaqkbai09fg1r22v8r66zu.x55x2vb9v8t54av4a.t53@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com; receiver=lists.ozlabs.org) Received: from mail-oa1-f79.google.com (mail-oa1-f79.google.com [209.85.160.79]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4f4ZKR3psJz2xpn for ; Tue, 03 Feb 2026 05:05:31 +1100 (AEDT) Received: by mail-oa1-f79.google.com with SMTP id 586e51a60fabf-4042a16a369so10404985fac.2 for ; Mon, 02 Feb 2026 10:05:30 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770055528; x=1770660328; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=2CYBvIOK9TzJ05c6sx0DJ6AmLW4gBCAz8kSfM8FzVRQ=; b=nj/MsZ+dROuFiCrcFNoAcAcsf0+u3FyZ3p4SpCbEs9uX4+fYh/0NrLo8X0W8xDNVUF jMRAPrC6xkpps+Cj7C/NJmChJfuZvI1Iy7IBsN/TszKvaZuL/AJZ/DbjdoygawEg+MpD NIIGWE7GBu32kvg8GFIM/J4GUhuZUfHmn3/vE1+8AqVRKJ0yV3ePlHJygrYl3zlaMPV7 eihRXo1Aqmm7b+/cvbUO4NFk1u2UFbBBsMJzkfuy2lozU2qjSyuibeArxfLdct01WpYr zg4jsJLYRTjShMSiAp2UDUGcbh/TQMmnSe1bUA3/vOWEALwt7RYFrOK2r7oT6M7p4gkM VBPQ== X-Forwarded-Encrypted: i=1; AJvYcCXBZ/ir/517RCFLZFjHKLrZ+BP6cst+I7fwca+WqpDekZi1qiGtxP0K+oZTXcwXUSA0pMDSxsr8guAhuw==@lists.ozlabs.org X-Gm-Message-State: AOJu0YyVRX+rZWmSXI6g9UYtQ0kpHbBC+P8BhdPMf3NSzNS5W/hfSAtW cWJ9mOviFKGzwv3gcGXURcVDVOz06DjA5d1LMwsh8lfFeUKEeuWZ4TqjFbNCwua7OQkHtE1e2dR ovu7V2tAliic1Lc2yhNlU0mSvUKVkb7YGy92xwt2mwswBeV2kgP9a+toPxjI= X-Mailing-List: linux-erofs@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 X-Received: by 2002:a05:6820:814:b0:659:9a49:90a6 with SMTP id 006d021491bc7-6630f03f81bmr5615195eaf.37.1770055528278; Mon, 02 Feb 2026 10:05:28 -0800 (PST) Date: Mon, 02 Feb 2026 10:05:28 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6980e768.050a0220.16b13.00a7.GAE@google.com> Subject: [syzbot] [erofs?] WARNING in erofs_iget (2) From: syzbot To: chao@kernel.org, dhavale@google.com, guochunhai@vivo.com, jefflexu@linux.alibaba.com, lihongbo22@huawei.com, linux-erofs@lists.ozlabs.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, xiang@kernel.org, zbestahu@gmail.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 33a647c659ff Add linux-next specific files for 20260129 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1404f93a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1b94612779ae7173 dashboard link: https://syzkaller.appspot.com/bug?extid=c2dd47dc153320cc4692 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17f2a45a580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17e5db2a580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/9d0ce0a8fecd/disk-33a647c6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4369620c4390/vmlinux-33a647c6.xz kernel image: https://storage.googleapis.com/syzbot-assets/18ae695e8dfc/bzImage-33a647c6.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/d92cbdf601af/mount_0.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=1102045a580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c2dd47dc153320cc4692@syzkaller.appspotmail.com VFS_WARN_ON_INODE(strlen(link) != linklen): inode:ffff8880591b5fc8 fs:erofs mode:120777 opflags:0x8 flags:0x0 state:0x1 count:1 ------------[ cut here ]------------ 1 WARNING: ./include/linux/fs.h:953 at inode_set_cached_link include/linux/fs.h:953 [inline], CPU#1: syz-executor/5938 WARNING: ./include/linux/fs.h:953 at erofs_fill_symlink fs/erofs/inode.c:25 [inline], CPU#1: syz-executor/5938 WARNING: ./include/linux/fs.h:953 at erofs_read_inode fs/erofs/inode.c:160 [inline], CPU#1: syz-executor/5938 WARNING: ./include/linux/fs.h:953 at erofs_fill_inode fs/erofs/inode.c:216 [inline], CPU#1: syz-executor/5938 WARNING: ./include/linux/fs.h:953 at erofs_iget+0x1f4d/0x2b10 fs/erofs/inode.c:285, CPU#1: syz-executor/5938 Modules linked in: CPU: 1 UID: 0 PID: 5938 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:inode_set_cached_link include/linux/fs.h:953 [inline] RIP: 0010:erofs_fill_symlink fs/erofs/inode.c:25 [inline] RIP: 0010:erofs_read_inode fs/erofs/inode.c:160 [inline] RIP: 0010:erofs_fill_inode fs/erofs/inode.c:216 [inline] RIP: 0010:erofs_iget+0x1f4d/0x2b10 fs/erofs/inode.c:285 Code: 0f 8c 65 e2 ff ff 48 89 df e8 ff 10 e3 fd e9 58 e2 ff ff e8 d5 af 79 fd 48 8b 7c 24 10 48 c7 c6 e0 7f 1e 8c e8 c4 a7 fd fd 90 <0f> 0b 90 e9 3c fe ff ff e8 b6 af 79 fd 48 8b 7c 24 10 48 c7 c6 60 RSP: 0018:ffffc900043bf780 EFLAGS: 00010246 RAX: 8b808a9eaf282f00 RBX: 0000000000000017 RCX: 8b808a9eaf282f00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc900043bf9a0 R08: ffffc900043bf367 R09: 1ffff92000877e6c R10: dffffc0000000000 R11: fffff52000877e6d R12: 0000000000000027 R13: 1ffff1100b236c03 R14: 0000000000000027 R15: ffff888027ca6d80 FS: 0000555581765500(0000) GS:ffff8881253a4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555581790aa8 CR3: 000000007f6b8000 CR4: 00000000003526f0 Call Trace: erofs_lookup+0x186/0x320 fs/erofs/namei.c:214 __lookup_slow+0x2b7/0x410 fs/namei.c:1916 lookup_slow+0x53/0x70 fs/namei.c:1933 walk_component fs/namei.c:2279 [inline] lookup_last fs/namei.c:2780 [inline] path_lookupat+0x3f5/0x8c0 fs/namei.c:2804 filename_lookup+0x256/0x5d0 fs/namei.c:2833 user_path_at+0x40/0x160 fs/namei.c:3612 ksys_umount fs/namespace.c:2052 [inline] __do_sys_umount fs/namespace.c:2060 [inline] __se_sys_umount fs/namespace.c:2058 [inline] __x64_sys_umount+0xf6/0x170 fs/namespace.c:2058 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f995879c117 Code: a2 c7 05 7c 94 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffcc0f75bd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f995879c117 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcc0f75c90 RBP: 00007ffcc0f75c90 R08: 00007ffcc0f76c90 R09: 00000000ffffffff R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcc0f76d80 R13: 00007f995880471f R14: 00005555817654e8 R15: 00007ffcc0f78f40 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup