syzbot

ntfs: (device loop0): parse_options(): Option utf8 is no longer supported, using option nls=utf8. Please use option nls=utf8 in the future and make sure utf8 is compiled either as a module or into the kernel.
ntfs: volume version 3.1.
==================================================================
BUG: KASAN: use-after-free in ntfs_commit_pages_after_write fs/ntfs/file.c:1604 [inline]
BUG: KASAN: use-after-free in ntfs_perform_write+0x4288/0x6ef4 fs/ntfs/file.c:1860
Write of size 1 at addr ffff0000e12fe170 by task syz-executor432/4222

CPU: 0 PID: 4222 Comm: syz-executor432 Not tainted 6.1.89-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x174/0x4c0 mm/kasan/report.c:395
 kasan_report+0xd4/0x130 mm/kasan/report.c:495
 kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:189
 memcpy+0x60/0x90 mm/kasan/shadow.c:66
 ntfs_commit_pages_after_write fs/ntfs/file.c:1604 [inline]
 ntfs_perform_write+0x4288/0x6ef4 fs/ntfs/file.c:1860
 ntfs_file_write_iter+0xf78/0x17b0 fs/ntfs/file.c:1917
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x610/0x914 fs/read_write.c:584
 ksys_write+0x15c/0x26c fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

The buggy address belongs to the physical page:
page:00000000a3002a9a refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x1212fe
flags: 0x5ffe00000000000(node=0|zone=2|lastcpupid=0xfff)
raw: 05ffe00000000000 fffffc0003836248 fffffc00038523c8 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e12fe000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000e12fe080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff0000e12fe100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                             ^
 ffff0000e12fe180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000e12fe200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================