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AJvYcCXbceeKGA4qM0f12U3CCGUo2ix+HwRSoVlZgeTkV7GWQXS9L+z9mmJbVCAu01/PXz11bA32Ew==@lists.linux.dev X-Gm-Message-State: AOJu0YwhHnO7/0SHCzNxd/y2EqB0URaiVX3/Fy9R+nA+mIw1e8dMjLZD G5L9gC88SspEIVO1htU+X2l44Y1ssYJzlpDhfDnpWj4KSLyPRZnNGu5E+rpm19AtPGuzkwDWa7S uGCxnl+acHMPxFuePjmAo/BMawKaY47fvaosxixZVLnfU8/ummur3pM2gcEs= X-Google-Smtp-Source: AGHT+IGuYh75Y60zj7Y/gHFM/I67F7Vl1AwrWJRBeRODoKjYWT1WvezaqxPPx54gfsrIG1iuHQ8PWhCQYzwZLiHytsAIskMPspqP Precedence: bulk X-Mailing-List: ntfs3@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:c245:0:b0:424:64c:5b5a with SMTP id e9e14a558f8ab-4241a412e23mr46960825ab.0.1758149730125; Wed, 17 Sep 2025 15:55:30 -0700 (PDT) Date: Wed, 17 Sep 2025 15:55:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68cb3c62.050a0220.50883.002b.GAE@google.com> Subject: [syzbot] [ntfs3?] KMSAN: uninit-value in ntfs_read_hdr (3) 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: 5aca7966d2a7 Merge tag 'perf-tools-fixes-for-v6.17-2025-09.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12998c7c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1b093ccee5a9e08c dashboard link: https://syzkaller.appspot.com/bug?extid=332bd4e9d148f11a87dc 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=14ccc534580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16998c7c580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/7dcf9f15bc6a/disk-5aca7966.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8836a30085d9/vmlinux-5aca7966.xz kernel image: https://storage.googleapis.com/syzbot-assets/b00f10dc0558/bzImage-5aca7966.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/78b7a2febda1/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+332bd4e9d148f11a87dc@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in ntfs_dir_emit fs/ntfs3/dir.c:335 [inline] BUG: KMSAN: uninit-value in ntfs_read_hdr+0xfcc/0x13e0 fs/ntfs3/dir.c:385 ntfs_dir_emit fs/ntfs3/dir.c:335 [inline] ntfs_read_hdr+0xfcc/0x13e0 fs/ntfs3/dir.c:385 ntfs_readdir+0xf21/0x1a30 fs/ntfs3/dir.c:496 iterate_dir+0x452/0x620 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:410 [inline] __se_sys_getdents64+0x17e/0x550 fs/readdir.c:396 __x64_sys_getdents64+0x97/0xe0 fs/readdir.c:396 x64_sys_call+0x3a14/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:218 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: ntfs_write_bh+0x6ae/0xe90 fs/ntfs3/fsntfs.c:1430 indx_write fs/ntfs3/index.c:1027 [inline] indx_insert_into_buffer+0x287/0x2010 fs/ntfs3/index.c:1809 indx_insert_entry+0xcde/0x1050 fs/ntfs3/index.c:1986 ni_add_name+0xef7/0x11e0 fs/ntfs3/frecord.c:2995 ntfs_link_inode+0x221/0x350 fs/ntfs3/inode.c:1728 ntfs_link+0x20e/0x500 fs/ntfs3/namei.c:146 vfs_link+0x8eb/0xb30 fs/namei.c:4854 do_linkat+0x4af/0x1040 fs/namei.c:4924 __do_sys_link fs/namei.c:4958 [inline] __se_sys_link fs/namei.c:4956 [inline] __x64_sys_link+0xd7/0x140 fs/namei.c:4956 x64_sys_call+0x162f/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:87 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: hdr_insert_de+0x4c8/0x550 fs/ntfs3/index.c:838 indx_insert_into_buffer+0x1b6/0x2010 fs/ntfs3/index.c:1805 indx_insert_entry+0xcde/0x1050 fs/ntfs3/index.c:1986 ni_add_name+0xef7/0x11e0 fs/ntfs3/frecord.c:2995 ntfs_link_inode+0x221/0x350 fs/ntfs3/inode.c:1728 ntfs_link+0x20e/0x500 fs/ntfs3/namei.c:146 vfs_link+0x8eb/0xb30 fs/namei.c:4854 do_linkat+0x4af/0x1040 fs/namei.c:4924 __do_sys_link fs/namei.c:4958 [inline] __se_sys_link fs/namei.c:4956 [inline] __x64_sys_link+0xd7/0x140 fs/namei.c:4956 x64_sys_call+0x162f/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:87 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:4197 [inline] slab_alloc_node mm/slub.c:4240 [inline] kmem_cache_alloc_noprof+0x81b/0xec0 mm/slub.c:4247 ntfs_link_inode+0x90/0x350 fs/ntfs3/inode.c:1716 ntfs_link+0x20e/0x500 fs/ntfs3/namei.c:146 vfs_link+0x8eb/0xb30 fs/namei.c:4854 do_linkat+0x4af/0x1040 fs/namei.c:4924 __do_sys_link fs/namei.c:4958 [inline] __se_sys_link fs/namei.c:4956 [inline] __x64_sys_link+0xd7/0x140 fs/namei.c:4956 x64_sys_call+0x162f/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:87 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 UID: 0 PID: 5963 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 ===================================================== --- 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