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AJvYcCX1nZ5Bo7+AIiQh3ULtUPXFFb61cIi0gx0bhCqsB2Kjd447P7Opttotd3uJCJguBIuM6DQMIe3iQtcImERp@vger.kernel.org X-Gm-Message-State: AOJu0YxSHySuCFvwWCNgylSDwSbxhzenGzj91vn1WlLW5YgQv3a0vP3+ aGPJasj23KB4sHKHXV+RXIzqPAXVvS9IXRvhgIzjTrqu3d2Dipm0SaEUxHwWd2YbKASv3r/z2PH AkYXDM+YJknr+7dyCV3RrjHHuPw0nZiw46E2of9NK9zOZUGbWaj3ZS8QluFE= X-Google-Smtp-Source: AGHT+IGL7YFyjcgeyIa0tMkaVS20x/UVQe/jRyOl88Crr9hcWdzGgNffX9ms3yaS2L49FkEq1PfmLM1GP5UVYunghN32qezSZf4N Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4289:b0:659:9a49:8e21 with SMTP id 006d021491bc7-65cfe748da1mr7332434eaf.19.1766671585267; Thu, 25 Dec 2025 06:06:25 -0800 (PST) Date: Thu, 25 Dec 2025 06:06:25 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <694d44e1.050a0220.35954c.0041.GAE@google.com> Subject: [syzbot] [jfs?] VFS: Busy inodes after unmount (use-after-free) (4) From: syzbot To: brauner@kernel.org, jack@suse.cz, jfs-discussion@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, shaggy@kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: ccd1cdca5cd4 Merge tag 'nfsd-6.19-1' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1697109a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a94030c847137a18 dashboard link: https://syzkaller.appspot.com/bug?extid=d569e274f46ca86f78fa compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14b1c8fc580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1478e022580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/f7b489f9e06c/disk-ccd1cdca.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6a3b40a08a43/vmlinux-ccd1cdca.xz kernel image: https://storage.googleapis.com/syzbot-assets/deb72d1923f7/bzImage-ccd1cdca.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/6c19056fd03d/mount_0.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=16972f1a580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d569e274f46ca86f78fa@syzkaller.appspotmail.com tblock:ffffc900027792a0: 00000002 00000000 027793b8 ffffc900 tblock:ffffc900027792b0: 99a20540 ffffffff 00003ab0 00000000 tblock:ffffc900027792c0: 44b53100 ffff8881 00000003 00000ab0 tblock:ffffc900027792d0: 00000000 dead4ead ffffffff 00000000 tblock:ffffc900027792e0: ffffffff ffffffff 99a203c0 ffffffff tblock:ffffc900027792f0: 00000000 00000000 00000000 00000000 tblock:ffffc90002779300: 8ba58f60 ffffffff 00000300 00000000 tblock:ffffc90002779310: 02779310 ffffc900 02779310 ffffc900 tblock:ffffc90002779320: 5a664d70 ffff8880 00000000 00000000 VFS: Busy inodes after unmount of loop0 (jfs) ------------[ cut here ]------------ kernel BUG at fs/super.c:653! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5960 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:generic_shutdown_super+0x2bc/0x2c0 fs/super.c:651 Code: 03 42 80 3c 28 00 74 08 4c 89 f7 e8 8e fa ed ff 49 8b 16 48 81 c3 68 06 00 00 48 c7 c7 e0 b2 79 8b 48 89 de e8 a5 8c ee fe 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f RSP: 0018:ffffc9000404fd00 EFLAGS: 00010246 RAX: 000000000000002d RBX: ffff8880318d6668 RCX: 29d16eab6a395c00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 1ffff1100631acf0 R08: ffff8880b86247d3 R09: 1ffff110170c48fa R10: dffffc0000000000 R11: ffffed10170c48fb R12: 0000000000000000 R13: dffffc0000000000 R14: ffffffff8e38bea0 R15: ffff8880318d6780 FS: 00005555777b6500(0000) GS:ffff888125e1f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbab6082000 CR3: 0000000030db6000 CR4: 0000000000350ef0 Call Trace: kill_block_super+0x44/0x90 fs/super.c:1722 deactivate_locked_super+0xbc/0x130 fs/super.c:474 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1318 task_work_run+0x1d4/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0xef/0x4e0 kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline] do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb469390a77 Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 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 a8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffc903b6258 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000064 RCX: 00007fb469390a77 RDX: 0000000000000200 RSI: 0000000000000009 RDI: 00007ffc903b7400 RBP: 00007fb469413d7d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000202 R12: 00007ffc903b7400 R13: 00007fb469413d7d R14: 00005555777b64a8 R15: 00007ffc903b84d0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:generic_shutdown_super+0x2bc/0x2c0 fs/super.c:651 Code: 03 42 80 3c 28 00 74 08 4c 89 f7 e8 8e fa ed ff 49 8b 16 48 81 c3 68 06 00 00 48 c7 c7 e0 b2 79 8b 48 89 de e8 a5 8c ee fe 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f RSP: 0018:ffffc9000404fd00 EFLAGS: 00010246 RAX: 000000000000002d RBX: ffff8880318d6668 RCX: 29d16eab6a395c00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 1ffff1100631acf0 R08: ffff8880b86247d3 R09: 1ffff110170c48fa R10: dffffc0000000000 R11: ffffed10170c48fb R12: 0000000000000000 R13: dffffc0000000000 R14: ffffffff8e38bea0 R15: ffff8880318d6780 FS: 00005555777b6500(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005619d76b3a38 CR3: 0000000030db6000 CR4: 0000000000350ef0 --- 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