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AJvYcCXrctxr25z0JsYY/C5qSB+bmLVPZLzMCAvzipFPDL5075w2GduT3KMRXzMdyb8CmAbhFIgblQ==@lists.linux.dev X-Gm-Message-State: AOJu0YyvvbMLQMeOUWmAiXNaOTS6D0yc92k/M3/v7ER5DxsFGCMd4wXr yeqKAxcTO93GHm89GGS9S2gMEzjeDUHmnszQYs2SIIWZ2mId3PRsvUg9t1Pswyr4maBD6E070ys kDszaelrbkx33mXCpbTTlEkzUt5QXsp9F4CqNl2uw+EwDHSLrVIT3nzSx8W4= 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:f00a:b0:65b:257b:a898 with SMTP id 006d021491bc7-67767294c72mr5285827eaf.29.1771188865489; Sun, 15 Feb 2026 12:54:25 -0800 (PST) Date: Sun, 15 Feb 2026 12:54:25 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69923281.050a0220.340abe.038e.GAE@google.com> Subject: [syzbot] [ntfs3?] WARNING in ntfs_extend_initialized_size (2) 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: 635c467cc14e Add linux-next specific files for 20260213 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=11d8c722580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f09eec269f9f4746 dashboard link: https://syzkaller.appspot.com/bug?extid=2bd8e813c7f767aa9bb1 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=15996c02580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=138f115a580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/24870d51cbd0/disk-635c467c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/49283c738806/vmlinux-635c467c.xz kernel image: https://storage.googleapis.com/syzbot-assets/8c5f9d1da977/bzImage-635c467c.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/0f8de5f7f0e7/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2bd8e813c7f767aa9bb1@syzkaller.appspotmail.com loop0: detected capacity change from 0 to 4096 ------------[ cut here ]------------ is_compressed(ni) WARNING: fs/ntfs3/file.c:236 at ntfs_extend_initialized_size+0x1dc/0x210 fs/ntfs3/file.c:236, CPU#0: syz.0.17/5995 Modules linked in: CPU: 0 UID: 0 PID: 5995 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:ntfs_extend_initialized_size+0x1dc/0x210 fs/ntfs3/file.c:236 Code: 0d ff 4c 89 33 31 ed eb 05 e8 20 6b a3 fe 89 e8 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d e9 cb a1 8e 08 cc e8 05 6b a3 fe 90 <0f> 0b 90 e9 31 ff ff ff 89 d1 80 e1 07 80 c1 03 38 c1 0f 8c e1 fe RSP: 0018:ffffc90003667c30 EFLAGS: 00010293 RAX: ffffffff8322375b RBX: ffff88805c1f1670 RCX: ffff8880300f9e40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000800 R08: ffff88805c1f1737 R09: 1ffff1100b83e2e6 R10: dffffc0000000000 R11: ffffed100b83e2e7 R12: 0000000000000012 R13: 0000000000000fee R14: 1ffff1100b83e2ce R15: 0000000000000000 FS: 000055556ac47500(0000) GS:ffff888125460000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f963fff CR3: 000000007a426000 CR4: 00000000003526f0 Call Trace: ntfs_fallocate+0xf21/0x1220 fs/ntfs3/file.c:670 vfs_fallocate+0x669/0x7e0 fs/open.c:340 ksys_fallocate fs/open.c:364 [inline] __do_sys_fallocate fs/open.c:369 [inline] __se_sys_fallocate fs/open.c:367 [inline] __x64_sys_fallocate+0xc0/0x110 fs/open.c:367 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f248b59bf79 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffdfe289018 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f248b815fa0 RCX: 00007f248b59bf79 RDX: 0000000000000fff RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f248b6327e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f248b815fac R14: 00007f248b815fa0 R15: 00007f248b815fa0 --- 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