loop0: detected capacity change from 0 to 128
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
hpfs: filesystem error: invalid number of hotfixes: 2066844986, used: 2066844985; already mounted read-only
hpfs: filesystem error: improperly stopped
hpfs: filesystem error: warning: spare dnodes used, try chkdsk
hpfs: You really don't want any checks? You are crazy...
hpfs: hpfs_map_sector(): read error
hpfs: code page support is disabled
==================================================================
BUG: KASAN: use-after-free in strcmp+0x6b/0xc0 lib/string.c:283
Read of size 1 at addr ffff88801f3e98a6 by task syz.0.0/5317

CPU: 0 UID: 0 PID: 5317 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xba/0x230 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 strcmp+0x6b/0xc0 lib/string.c:283
 hpfs_get_ea+0x134/0xee0 fs/hpfs/ea.c:139
 hpfs_read_inode+0x1a6/0x1050 fs/hpfs/inode.c:63
 hpfs_fill_super+0x123d/0x1fa0 fs/hpfs/super.c:651
 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1694
 vfs_get_tree+0x92/0x2a0 fs/super.c:1754
 fc_mount fs/namespace.c:1193 [inline]
 do_new_mount_fc fs/namespace.c:3760 [inline]
 do_new_mount+0x341/0xd30 fs/namespace.c:3836
 do_mount fs/namespace.c:4159 [inline]
 __do_sys_mount fs/namespace.c:4348 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4325
 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: 0033:0x7f0c7db9d20a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f0c7ea00e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f0c7ea00ee0 RCX: 00007f0c7db9d20a
RDX: 000020000000a000 RSI: 0000200000009ec0 RDI: 00007f0c7ea00ea0
RBP: 000020000000a000 R08: 00007f0c7ea00ee0 R09: 0000000003a00041
R10: 0000000003a00041 R11: 0000000000000246 R12: 0000200000009ec0
R13: 00007f0c7ea00ea0 R14: 0000000000009e2f R15: 0000200000000300
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x55ab7d9c9 pfn:0x1f3e9
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f0(buddy)
raw: 00fff00000000000 ffffea00002ed9c8 ffffea00007f7788 0000000000000000
raw: 000000055ab7d9c9 0000000000000000 00000000f0000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 5314, tgid 5314 (dhcpcd), ts 83575822422, free_ts 90174945299
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x231/0x280 mm/page_alloc.c:1888
 prep_new_page mm/page_alloc.c:1896 [inline]
 get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3961
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5249
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2485
 folio_alloc_mpol_noprof+0x39/0x70 mm/mempolicy.c:2504
 swap_cache_alloc_folio+0xd5/0x240 mm/swap_state.c:571
 swap_cluster_readahead+0x369/0x690 mm/swap_state.c:749
 swapin_readahead+0x196/0xc50 mm/swap_state.c:924
 do_swap_page+0x54f/0x58d0 mm/memory.c:4793
 handle_pte_fault mm/memory.c:6311 [inline]
 __handle_mm_fault mm/memory.c:6446 [inline]
 handle_mm_fault+0x12d2/0x3310 mm/memory.c:6615
 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334
 handle_page_fault arch/x86/mm/fault.c:1474 [inline]
 exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
page last free pid 73 tgid 73 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1432 [inline]
 free_unref_folios+0xd38/0x14c0 mm/page_alloc.c:3039
 shrink_folio_list+0x297b/0x51a0 mm/vmscan.c:1532
 evict_folios+0x4795/0x5880 mm/vmscan.c:4708
 try_to_shrink_lruvec+0x8b2/0xb40 mm/vmscan.c:4871
 shrink_one+0x25c/0x710 mm/vmscan.c:4916
 shrink_many mm/vmscan.c:4979 [inline]
 lru_gen_shrink_node mm/vmscan.c:5057 [inline]
 shrink_node+0x30e2/0x39d0 mm/vmscan.c:6037
 kswapd_shrink_node mm/vmscan.c:6884 [inline]
 balance_pgdat mm/vmscan.c:7060 [inline]
 kswapd+0x13ef/0x2a40 mm/vmscan.c:7333
 kthread+0x388/0x470 kernel/kthread.c:467
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Memory state around the buggy address:
 ffff88801f3e9780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88801f3e9800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88801f3e9880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                               ^
 ffff88801f3e9900: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88801f3e9980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================