syzbot

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BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:131 [inline]
BUG: KMSAN: kernel-infoleak in copy_to_user_iter lib/iov_iter.c:24 [inline]
BUG: KMSAN: kernel-infoleak in iterate_ubuf include/linux/iov_iter.h:30 [inline]
BUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:302 [inline]
BUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:330 [inline]
BUG: KMSAN: kernel-infoleak in _copy_to_iter+0xef3/0x3400 lib/iov_iter.c:197
 instrument_copy_to_user include/linux/instrumented.h:131 [inline]
 copy_to_user_iter lib/iov_iter.c:24 [inline]
 iterate_ubuf include/linux/iov_iter.h:30 [inline]
 iterate_and_advance2 include/linux/iov_iter.h:302 [inline]
 iterate_and_advance include/linux/iov_iter.h:330 [inline]
 _copy_to_iter+0xef3/0x3400 lib/iov_iter.c:197
 copy_page_to_iter+0x46d/0x790 lib/iov_iter.c:374
 copy_folio_to_iter include/linux/uio.h:204 [inline]
 filemap_read+0xd03/0x2300 mm/filemap.c:2857
 blkdev_read_iter+0x89f/0xb00 block/fops.c:855
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x8ec/0xf90 fs/read_write.c:574
 ksys_read+0x1d9/0x470 fs/read_write.c:717
 __do_sys_read fs/read_write.c:726 [inline]
 __se_sys_read fs/read_write.c:724 [inline]
 __x64_sys_read+0x97/0xf0 fs/read_write.c:724
 x64_sys_call+0x311c/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:1
 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:
 ntfs_write_bh+0x6c2/0xeb0 fs/ntfs3/fsntfs.c:1465
 mi_write+0xb4/0x2f0 fs/ntfs3/record.c:402
 ni_write_inode+0xcdb/0x1cc0 fs/ntfs3/frecord.c:3228
 ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1053
 write_inode fs/fs-writeback.c:1584 [inline]
 __writeback_single_inode+0x8a0/0x10a0 fs/fs-writeback.c:1827
 writeback_sb_inodes+0xb1a/0x1d50 fs/fs-writeback.c:2056
 wb_writeback+0x4d3/0xc50 fs/fs-writeback.c:2241
 wb_do_writeback fs/fs-writeback.c:2388 [inline]
 wb_workfn+0x3a2/0x1970 fs/fs-writeback.c:2428
 process_one_work kernel/workqueue.c:3302 [inline]
 process_scheduled_works+0xb65/0x1e40 kernel/workqueue.c:3385
 worker_thread+0xee4/0x1590 kernel/workqueue.c:3466
 kthread+0x53f/0x600 kernel/kthread.c:436
 ret_from_fork+0x20f/0x8d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Uninit was stored to memory at:
 hdr_insert_de+0xdbe/0xe60 fs/ntfs3/index.c:834
 indx_insert_into_root+0x878/0x38c0 fs/ntfs3/index.c:1631
 indx_insert_entry+0x104f/0x1240 fs/ntfs3/index.c:2002
 ni_add_name+0xef7/0x11e0 fs/ntfs3/frecord.c:2769
 ni_rename+0x97/0x220 fs/ntfs3/frecord.c:2800
 ntfs_rename+0xde9/0x1280 fs/ntfs3/namei.c:331
 vfs_rename+0x2149/0x2650 fs/namei.c:6054
 filename_renameat2+0xb7f/0x1260 fs/namei.c:6172
 __do_sys_rename fs/namei.c:6216 [inline]
 __se_sys_rename+0xc5/0x5d0 fs/namei.c:6212
 __x64_sys_rename+0x78/0xb0 fs/namei.c:6212
 x64_sys_call+0x329/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:83
 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 created at:
 slab_post_alloc_hook mm/slub.c:4576 [inline]
 slab_alloc_node mm/slub.c:4898 [inline]
 __kmalloc_cache_noprof+0x35e/0x1240 mm/slub.c:5410
 kmalloc_noprof include/linux/slab.h:950 [inline]
 ntfs_rename+0x885/0x1280 fs/ntfs3/namei.c:306
 vfs_rename+0x2149/0x2650 fs/namei.c:6054
 filename_renameat2+0xb7f/0x1260 fs/namei.c:6172
 __do_sys_rename fs/namei.c:6216 [inline]
 __se_sys_rename+0xc5/0x5d0 fs/namei.c:6212
 __x64_sys_rename+0x78/0xb0 fs/namei.c:6212
 x64_sys_call+0x329/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:83
 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

Bytes 404-407 of 1536 are uninitialized
Memory access of size 1536 starts at ffff888049622000
Data copied to user address 00007f91f6b55000

CPU: 0 UID: 0 PID: 5902 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
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