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Thu, 18 Sep 2025 12:56:02 -0700 (PDT) Date: Thu, 18 Sep 2025 12:56:02 -0700 In-Reply-To: <20250918193455.115481-1-sidharthseela@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68cc63d2.a00a0220.37dadf.0005.GAE@google.com> Subject: Re: [syzbot] [ntfs3?] KMSAN: uninit-value in ntfs_read_hdr (3) From: syzbot To: linux-kernel@vger.kernel.org, sidharthseela@gmail.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KMSAN: uninit-value in ntfs_read_hdr ===================================================== 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 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_lookup+0x60/0x410 fs/ntfs3/namei.c:71 lookup_one_qstr_excl+0x23f/0x7a0 fs/namei.c:1697 filename_create+0x2cb/0x590 fs/namei.c:4140 do_linkat+0x1fb/0x1040 fs/namei.c:4908 __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: 1 UID: 0 PID: 6379 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 ===================================================== Tested on: commit: cbf658dd Merge tag 'net-6.17-rc7' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1430c0e2580000 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 patch: https://syzkaller.appspot.com/x/patch.diff?x=11383f62580000