ntfs: (device loop0): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 0x3fc.
attempt to access beyond end of device
loop0: rw=0, want=2044, limit=247
ntfs: (device loop0): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 0x3fd.
attempt to access beyond end of device
loop0: rw=0, want=2046, limit=247
ntfs: (device loop0): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 0x3fe.
attempt to access beyond end of device
loop0: rw=0, want=2048, limit=247
=====================================================
BUG: KMSAN: uninit-value in post_read_mst_fixup+0x606/0xba0 fs/ntfs/mst.c:39
CPU: 0 PID: 12111 Comm: syz-executor.0 Not tainted 5.9.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:122
 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:201
 post_read_mst_fixup+0x606/0xba0 fs/ntfs/mst.c:39
 ntfs_end_buffer_async_read+0xbf0/0x14f0 fs/ntfs/aops.c:133
 end_bio_bh_io_sync+0x174/0x230 fs/buffer.c:3021
 bio_endio+0xb51/0xdf0 block/bio.c:1451
 submit_bio_checks+0x1b92/0x2250 block/blk-core.c:1075
 submit_bio_noacct+0x61/0x1f70 block/blk-core.c:1198
 submit_bio+0x526/0xa60 block/blk-core.c:1283
 submit_bh_wbc+0xdc0/0xe70 fs/buffer.c:3070
 submit_bh+0x97/0xc0 fs/buffer.c:3076
 ntfs_read_block fs/ntfs/aops.c:345 [inline]
 ntfs_readpage+0x3905/0x3d70 fs/ntfs/aops.c:435
 do_read_cache_page+0x156d/0x1a20 mm/filemap.c:2971
 read_cache_page+0xf3/0x110 mm/filemap.c:3070
 read_mapping_page include/linux/pagemap.h:437 [inline]
 ntfs_map_page fs/ntfs/aops.h:75 [inline]
 check_mft_mirror+0x7d1/0x3130 fs/ntfs/super.c:1109
 load_system_files fs/ntfs/super.c:1772 [inline]
 ntfs_fill_super+0x44e2/0xacd0 fs/ntfs/super.c:2894
 mount_bdev+0x619/0x900 fs/super.c:1417
 ntfs_mount+0xc9/0xe0 fs/ntfs/super.c:3051
 legacy_get_tree+0x163/0x2e0 fs/fs_context.c:592
 vfs_get_tree+0xd8/0x5d0 fs/super.c:1547
 do_new_mount fs/namespace.c:2875 [inline]
 path_mount+0x3dde/0x5db0 fs/namespace.c:3192
 do_mount+0x1c6/0x220 fs/namespace.c:3205
 __do_compat_sys_mount fs/compat.c:122 [inline]
 __se_compat_sys_mount+0x7bb/0xaa0 fs/compat.c:89
 __ia32_compat_sys_mount+0x62/0x80 fs/compat.c:89
 do_syscall_32_irqs_on arch/x86/entry/common.c:80 [inline]
 __do_fast_syscall_32+0x129/0x180 arch/x86/entry/common.c:139
 do_fast_syscall_32+0x6a/0xc0 arch/x86/entry/common.c:162
 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:205
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f6c549
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f5565f20 EFLAGS: 00000292 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00000000f5565f7c RCX: 0000000020000100
RDX: 0000000020000000 RSI: 0000000000000000 RDI: 00000000f5565fbc
RBP: 00000000f5565f7c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Uninit was created at:
 kmsan_save_stack_with_flags+0x3c/0x90 mm/kmsan/kmsan.c:129
 kmsan_alloc_page+0xd3/0x1f0 mm/kmsan/kmsan_shadow.c:278
 __alloc_pages_nodemask+0x84e/0x1040 mm/page_alloc.c:4938
 alloc_pages_current+0x79b/0xb40 mm/mempolicy.c:2275
 alloc_pages include/linux/gfp.h:545 [inline]
 __page_cache_alloc+0xbd/0x2f0 mm/filemap.c:957
 do_read_cache_page+0x35c/0x1a20 mm/filemap.c:2955
 read_cache_page+0xf3/0x110 mm/filemap.c:3070
 read_mapping_page include/linux/pagemap.h:437 [inline]
 ntfs_map_page fs/ntfs/aops.h:75 [inline]
 check_mft_mirror+0x7d1/0x3130 fs/ntfs/super.c:1109
 load_system_files fs/ntfs/super.c:1772 [inline]
 ntfs_fill_super+0x44e2/0xacd0 fs/ntfs/super.c:2894
 mount_bdev+0x619/0x900 fs/super.c:1417
 ntfs_mount+0xc9/0xe0 fs/ntfs/super.c:3051
 legacy_get_tree+0x163/0x2e0 fs/fs_context.c:592
 vfs_get_tree+0xd8/0x5d0 fs/super.c:1547
 do_new_mount fs/namespace.c:2875 [inline]
 path_mount+0x3dde/0x5db0 fs/namespace.c:3192
 do_mount+0x1c6/0x220 fs/namespace.c:3205
 __do_compat_sys_mount fs/compat.c:122 [inline]
 __se_compat_sys_mount+0x7bb/0xaa0 fs/compat.c:89
 __ia32_compat_sys_mount+0x62/0x80 fs/compat.c:89
 do_syscall_32_irqs_on arch/x86/entry/common.c:80 [inline]
 __do_fast_syscall_32+0x129/0x180 arch/x86/entry/common.c:139
 do_fast_syscall_32+0x6a/0xc0 arch/x86/entry/common.c:162
 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:205
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
=====================================================