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AFNElJ/Wug+xKfm9W9At7Kxv/zjx+8SgtYLAEOcLRJYngzsndd472nu/SUZAgli51H8B7MuLmNyFbw==@lists.linux.dev X-Gm-Message-State: AOJu0YySyBj2AILMwjJiVS6NKVspdnFOpnqmXmEDBzwWYwC9PaqEfXgt HIAoQumsQMInq/m2ioMWyPz6vUEXLweM/AXVLXK8a7jvs9m8sfSNKBB4ImKQP0cipeGp7sINmhB nbMQw4JIytf8kHzgaAMbvrktd0q16fRDftYQBG9TPfEyk13PCh2+ms/jGoc8= Precedence: bulk X-Mailing-List: ntfs3@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:152a:b0:696:924c:43cc with SMTP id 006d021491bc7-69d7ecd6832mr9160881eaf.47.1779763721076; Mon, 25 May 2026 19:48:41 -0700 (PDT) Date: Mon, 25 May 2026 19:48:41 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a150a09.820a0220.e7972.0005.GAE@google.com> Subject: [syzbot] [ntfs3?] KMSAN: uninit-value in ni_seek_data_or_hole From: syzbot To: almaz.alexandrovich@paragon-software.com, linux-kernel@vger.kernel.org, ntfs3@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: cca95436be15 Merge tag 'phy-fixes-7.1' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10e36d6a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=91978e795dcd971b dashboard link: https://syzkaller.appspot.com/bug?extid=c2cfe997245202e46f10 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=147dad96580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=140c2cec580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/fb3ceeccf5bc/disk-cca95436.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/af588c0672f1/vmlinux-cca95436.xz kernel image: https://storage.googleapis.com/syzbot-assets/beac806b38fd/bzImage-cca95436.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/7ca9c62c48ea/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c2cfe997245202e46f10@syzkaller.appspotmail.com ntfs3(loop0): Mark volume as dirty due to NTFS errors ntfs3(loop0): ino=1a, mi_enum_attr ntfs3(loop0): ino=1a, mi_enum_attr ntfs3(loop0): Failed to initialize $Extend/$Reparse. ===================================================== BUG: KMSAN: uninit-value in ni_seek_data_or_hole+0x24f/0x5f0 fs/ntfs3/frecord.c:2862 ni_seek_data_or_hole+0x24f/0x5f0 fs/ntfs3/frecord.c:2862 ntfs_llseek+0x22a/0x4a0 fs/ntfs3/file.c:1530 vfs_llseek fs/read_write.c:391 [inline] ksys_lseek fs/read_write.c:404 [inline] __do_sys_lseek fs/read_write.c:414 [inline] __se_sys_lseek fs/read_write.c:412 [inline] __x64_sys_lseek+0x29d/0x460 fs/read_write.c:412 x64_sys_call+0x3004/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:9 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: ni_seek_data_or_hole+0x248/0x5f0 fs/ntfs3/frecord.c:2862 ntfs_llseek+0x22a/0x4a0 fs/ntfs3/file.c:1530 vfs_llseek fs/read_write.c:391 [inline] ksys_lseek fs/read_write.c:404 [inline] __do_sys_lseek fs/read_write.c:414 [inline] __se_sys_lseek fs/read_write.c:412 [inline] __x64_sys_lseek+0x29d/0x460 fs/read_write.c:412 x64_sys_call+0x3004/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:9 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Local variable lcn created at: ni_seek_data_or_hole+0x72/0x5f0 fs/ntfs3/frecord.c:2851 ntfs_llseek+0x22a/0x4a0 fs/ntfs3/file.c:1530 CPU: 0 UID: 0 PID: 5901 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 ===================================================== --- 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