syzbot

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BUG: KMSAN: uninit-value in memcmp lib/string.c:683 [inline]
BUG: KMSAN: uninit-value in bcmp+0x98/0x150 lib/string.c:715
 memcmp lib/string.c:683 [inline]
 bcmp+0x98/0x150 lib/string.c:715
 _Z6memcmpPKvU25pass_dynamic_object_size0S0_U25pass_dynamic_object_size0m include/linux/fortify-string.h:727 [inline]
 ni_update_parent+0xcc0/0x14c0 fs/ntfs3/frecord.c:3148
 ni_write_inode+0x1b67/0x1c40 fs/ntfs3/frecord.c:3264
 ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1019
 write_inode fs/fs-writeback.c:1525 [inline]
 __writeback_single_inode+0x88f/0x1190 fs/fs-writeback.c:1745
 writeback_sb_inodes+0xaa9/0x1c90 fs/fs-writeback.c:1976
 __writeback_inodes_wb+0x14e/0x480 fs/fs-writeback.c:2047
 wb_writeback+0x4fa/0xc00 fs/fs-writeback.c:2158
 wb_check_old_data_flush fs/fs-writeback.c:2262 [inline]
 wb_do_writeback fs/fs-writeback.c:2315 [inline]
 wb_workfn+0x10ca/0x1910 fs/fs-writeback.c:2343
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xb97/0x1d90 kernel/workqueue.c:3319
 worker_thread+0xedf/0x1590 kernel/workqueue.c:3400
 kthread+0xd59/0xf00 kernel/kthread.c:464
 ret_from_fork+0x6e/0x90 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4167 [inline]
 slab_alloc_node mm/slub.c:4210 [inline]
 kmem_cache_alloc_noprof+0x81b/0xec0 mm/slub.c:4217
 getname_flags+0x102/0xac0 fs/namei.c:146
 getname include/linux/fs.h:2852 [inline]
 __do_sys_rename fs/namei.c:5317 [inline]
 __se_sys_rename fs/namei.c:5315 [inline]
 __x64_sys_rename+0x70/0x140 fs/namei.c:5315
 x64_sys_call+0x3553/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:83
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x1b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 UID: 0 PID: 74 Comm: kworker/u8:5 Not tainted 6.15.0-rc3-syzkaller-00094-g02ddfb981de8 #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: writeback wb_workfn (flush-7:0)
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