From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B383C7460 for ; Fri, 6 Jan 2023 16:15:42 +0000 (UTC) Received: by mail-io1-f71.google.com with SMTP id m5-20020a6b7f45000000b006fc1dded1b9so1025561ioq.18 for ; Fri, 06 Jan 2023 08:15:42 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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=UNRYTiAron3sOqUpJ4KY77PVeml0gjHFzZsHxgV0AOw=; b=YAxL+Z5+yOX2sOzYc/Q8CMuGqnXO490ILuKx8ccCey/8jScxIASiPKjfxegyc2lFKx skkRi+ywM3h4UrMD166Qm434TN8IlUr3pMeKU6TB1YQkpYLlUnj4va0qD9uJueq4U5sZ 2FER7ZCAwc9IlYEv+2F6K6Qvbx6NUu+bQ3tWX0YI7qFkvzOlr6MCdNjON53we3EPNss3 5rgfesjNaGQqZktCzxs2V+Sbltc2Y5TSf4C1BZnLqUX3Qu5SZam9bVWHxW3pk5GCR5QD i9YKjRn76+hFRhwWsGLYwJFDXiGq/wsT/P1Je6y4AX0pluSblYh/6C75QqMuBxse9lvO oN+Q== X-Gm-Message-State: AFqh2krEJaA/n8p51AHqAT85rOYohZcx94fnkN8M/UG1nDY8ga/IrgEo mtc1woZAP7ef/KX1KsenHYaN/QQlroqdF4WhVN3ZDdbK3F10 X-Google-Smtp-Source: AMrXdXvVvhoHVE3I5wZ5bk8vuHXbnqPkZRWPGd+DQI0jEuAuia7zdBysgwK4Q/e0aLDS5CAtqfWlHrgRsDXT9ZqkBcqkh1oi5xO/ Precedence: bulk X-Mailing-List: ntfs3@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:c71:b0:30d:87b7:cfb2 with SMTP id f17-20020a056e020c7100b0030d87b7cfb2mr595870ilj.228.1673021741666; Fri, 06 Jan 2023 08:15:41 -0800 (PST) Date: Fri, 06 Jan 2023 08:15:41 -0800 In-Reply-To: <000000000000fd3bbe05efb0d1fd@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000009d209d05f19abaed@google.com> Subject: Re: [syzbot] [vfs?] [ntfs3?] [tmpfs?] WARNING in walk_component From: syzbot To: akpm@linux-foundation.org, almaz.alexandrovich@paragon-software.com, hughd@google.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, ntfs3@lists.linux.dev, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 1f5abbd77e2c Merge tag 'thermal-6.2-rc3' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=113cc806480000 kernel config: https://syzkaller.appspot.com/x/.config?x=46221e8203c7aca6 dashboard link: https://syzkaller.appspot.com/bug?extid=eba014ac93ef29f83dc8 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17f5d83a480000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1727f4b4480000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6c5b2e8c2c94/disk-1f5abbd7.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8956b2eee8db/vmlinux-1f5abbd7.xz kernel image: https://storage.googleapis.com/syzbot-assets/c3464b3b12f5/bzImage-1f5abbd7.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/6acfd5ce1186/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+eba014ac93ef29f83dc8@syzkaller.appspotmail.com ------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON(!is_rwsem_reader_owned(sem)): count = 0x0, magic = 0xffff8880708871d0, owner = 0x0, curr 0xffff8880279e1d40, list empty WARNING: CPU: 1 PID: 5194 at kernel/locking/rwsem.c:1336 __up_read+0x5c0/0x720 kernel/locking/rwsem.c:1336 Modules linked in: CPU: 1 PID: 5194 Comm: syz-executor234 Not tainted 6.2.0-rc2-syzkaller-00203-g1f5abbd77e2c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:__up_read+0x5c0/0x720 kernel/locking/rwsem.c:1336 Code: 03 80 3c 02 00 0f 85 35 01 00 00 49 8b 17 4d 89 f1 4c 89 e9 48 c7 c6 80 44 4c 8a ff 34 24 48 c7 c7 c0 41 4c 8a e8 70 b8 5c 08 <0f> 0b 5e e9 38 fb ff ff 48 89 df e8 e0 8a 6c 00 e9 b2 fa ff ff 48 RSP: 0018:ffffc90003f4fb58 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffffffff8e730c28 RCX: 0000000000000000 RDX: ffff8880279e1d40 RSI: ffffffff8166721c RDI: fffff520007e9f5d RBP: ffff8880708871d8 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000000 R12: 1ffff920007e9f6f R13: ffff8880708871d0 R14: ffff8880279e1d40 R15: ffff8880708871d0 FS: 00007f022ae3c700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f02330f3120 CR3: 000000001d72a000 CR4: 0000000000350ee0 Call Trace: inode_unlock_shared include/linux/fs.h:771 [inline] lookup_slow fs/namei.c:1703 [inline] walk_component+0x34a/0x5a0 fs/namei.c:1993 lookup_last fs/namei.c:2450 [inline] path_lookupat+0x1ba/0x840 fs/namei.c:2474 filename_lookup+0x1d2/0x590 fs/namei.c:2503 user_path_at_empty+0x46/0x60 fs/namei.c:2876 user_path_at include/linux/namei.h:57 [inline] __do_sys_chdir fs/open.c:514 [inline] __se_sys_chdir fs/open.c:508 [inline] __x64_sys_chdir+0xbb/0x240 fs/open.c:508 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f02330b1a19 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f022ae3c2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 0000000000000029 RCX: 00007f02330b1a19 RDX: 00007f02330b1a19 RSI: ffffffffffffffb8 RDI: 0000000020000380 RBP: 00007f0233155798 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0233155790 R13: 00007f023315579c R14: 6573726168636f69 R15: 0030656c69662f2e