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; going on - but anything won't be destroyed because it's read-only hpfs: filesystem error: improperly stopped hpfs: filesystem error: warning: spare dnodes used, try chkdsk hpfs: Proceeding, but your filesystem could be corrupted if you delete files or directories 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:265 Read of size 1 at addr ffff88801af6a8a6 by task syz.0.0/5313 CPU: 0 UID: 0 PID: 5313 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: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description+0x55/0x1e0 mm/kasan/report.c:378 print_report+0x58/0x70 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 strcmp+0x6b/0xc0 lib/string.c:265 hpfs_get_ea+0x137/0xeb0 fs/hpfs/ea.c:139 hpfs_read_inode+0x1a9/0x1060 fs/hpfs/inode.c:63 hpfs_fill_super+0x1275/0x1fa0 fs/hpfs/super.c:652 get_tree_bdev_flags+0x430/0x4f0 fs/super.c:1887 vfs_get_tree+0x92/0x2a0 fs/super.c:1947 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa608f9f34a 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:00007fa609ebae18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fa609ebaea0 RCX: 00007fa608f9f34a RDX: 000020000000a000 RSI: 0000200000009ec0 RDI: 00007fa609ebae60 RBP: 000020000000a000 R08: 00007fa609ebaea0 R09: 0000000003a00041 R10: 0000000003a00041 R11: 0000000000000246 R12: 0000200000009ec0 R13: 00007fa609ebae60 R14: 0000000000009e22 R15: 0000200000000100 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x328 pfn:0x1af6a flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 dead000000000100 dead000000000122 0000000000000000 raw: 0000000000000328 0000000000000000 00000000ffffffff 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 0x152c4a(GFP_NOFS|__GFP_HIGHMEM|__GFP_MOVABLE|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 5276, tgid 5276 (syz-executor), ts 92823234532 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871 prep_new_page mm/page_alloc.c:1879 [inline] get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943 __alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436 alloc_pages_mpol+0x21e/0x390 mm/mempolicy.c:2495 alloc_frozen_pages_noprof mm/mempolicy.c:2566 [inline] alloc_pages_noprof+0xb1/0x2b0 mm/mempolicy.c:2586 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2596 filemap_alloc_folio_noprof+0x111/0x460 mm/filemap.c:1019 ractl_alloc_folio mm/readahead.c:200 [inline] page_cache_ra_unbounded+0x390/0x9d0 mm/readahead.c:288 do_page_cache_ra mm/readahead.c:348 [inline] page_cache_ra_order+0xb47/0xee0 mm/readahead.c:558 do_sync_mmap_readahead+0x75e/0x990 mm/filemap.c:3443 filemap_fault+0x7d9/0x13b0 mm/filemap.c:3597 __do_fault+0x138/0x2a0 mm/memory.c:5503 do_read_fault mm/memory.c:5938 [inline] do_fault mm/memory.c:6072 [inline] do_pte_missing+0x2215/0x34b0 mm/memory.c:4638 handle_pte_fault mm/memory.c:6496 [inline] __handle_mm_fault mm/memory.c:6645 [inline] handle_mm_fault+0x19f5/0x3720 mm/memory.c:6814 do_user_addr_fault+0xa4f/0x1340 arch/x86/mm/fault.c:1343 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536 page last free pid 76 tgid 76 ts 94817759891 stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] __free_pages_prepare mm/page_alloc.c:1418 [inline] free_unref_folios+0xdc2/0x14e0 mm/page_alloc.c:3022 shrink_folio_list+0x4b23/0x5350 mm/vmscan.c:1575 evict_folios+0x3821/0x49e0 mm/vmscan.c:4841 try_to_shrink_lruvec+0xe3b/0x1340 mm/vmscan.c:5004 shrink_one+0x233/0x730 mm/vmscan.c:5045 shrink_many mm/vmscan.c:5108 [inline] lru_gen_shrink_node mm/vmscan.c:5186 [inline] shrink_node+0x3303/0x3b60 mm/vmscan.c:6175 kswapd_shrink_node mm/vmscan.c:7029 [inline] balance_pgdat mm/vmscan.c:7207 [inline] kswapd+0x185e/0x32c0 mm/vmscan.c:7483 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 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: ffff88801af6a780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88801af6a800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88801af6a880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88801af6a900: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88801af6a980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================