hpfs: code page support is disabled hpfs: hpfs_map_sector(): read error hpfs: hpfs_map_sector(): read error ================================================================== BUG: KASAN: out-of-bounds in strcmp+0x6f/0xb0 lib/string.c:288 Read of size 1 at addr ffff88806c6b9fa6 by task syz.0.1/5862 CPU: 0 PID: 5862 Comm: syz.0.1 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xac/0x220 mm/kasan/report.c:468 kasan_report+0x117/0x150 mm/kasan/report.c:581 strcmp+0x6f/0xb0 lib/string.c:288 hpfs_get_ea+0x115/0xda0 fs/hpfs/ea.c:139 hpfs_read_inode+0x657/0x1010 fs/hpfs/inode.c:77 hpfs_fill_super+0x12d5/0x1ec0 fs/hpfs/super.c:712 mount_bdev+0x22b/0x2d0 fs/super.c:1643 legacy_get_tree+0xea/0x180 fs/fs_context.c:662 vfs_get_tree+0x8c/0x280 fs/super.c:1764 do_new_mount+0x24b/0xa40 fs/namespace.c:3386 do_mount fs/namespace.c:3726 [inline] __do_sys_mount fs/namespace.c:3935 [inline] __se_sys_mount+0x2da/0x3c0 fs/namespace.c:3912 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f3eb1b90eea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3eb2988e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f3eb2988ef0 RCX: 00007f3eb1b90eea RDX: 000020000000a000 RSI: 0000200000000000 RDI: 00007f3eb2988eb0 RBP: 000020000000a000 R08: 00007f3eb2988ef0 R09: 0000000003200041 R10: 0000000003200041 R11: 0000000000000246 R12: 0000200000000000 R13: 00007f3eb2988eb0 R14: 0000000000009e15 R15: 0000200000000040 The buggy address belongs to the physical page: page:ffffea0001b1ae40 refcount:1 mapcount:1 mapping:0000000000000000 index:0x3b9 pfn:0x6c6b9 memcg:ffff88807f946000 anon flags: 0xfff800000a0028(uptodate|lru|mappedtodisk|swapbacked|node=0|zone=1|lastcpupid=0x7ff) page_type: 0x0() raw: 00fff800000a0028 ffffea0001b1b288 ffffea0001b1b2c8 ffff88802d2ae771 raw: 00000000000003b9 0000000000000000 0000000100000000 ffff88807f946000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 5768, tgid 5768 (syz-executor), ts 73544678709, free_ts 73520809760 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1cd/0x210 mm/page_alloc.c:1554 prep_new_page mm/page_alloc.c:1561 [inline] get_page_from_freelist+0x195c/0x19f0 mm/page_alloc.c:3191 __alloc_pages+0x1e3/0x460 mm/page_alloc.c:4457 __folio_alloc+0x10/0x20 mm/page_alloc.c:4489 vma_alloc_folio+0x47a/0x8f0 mm/mempolicy.c:2242 wp_page_copy mm/memory.c:3094 [inline] do_wp_page+0x12bd/0x3630 mm/memory.c:3469 handle_pte_fault mm/memory.c:5063 [inline] __handle_mm_fault mm/memory.c:5188 [inline] handle_mm_fault+0x12d4/0x4920 mm/memory.c:5353 do_user_addr_fault+0xad0/0x12e0 arch/x86/mm/fault.c:1324 handle_page_fault arch/x86/mm/fault.c:1465 [inline] exc_page_fault+0x67/0x110 arch/x86/mm/fault.c:1521 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1154 [inline] free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336 free_unref_page_list+0xbe/0x860 mm/page_alloc.c:2475 release_pages+0x1fa0/0x2220 mm/swap.c:1022 folios_put include/linux/mm.h:1548 [inline] folio_batch_move_lru+0x5bb/0x6b0 mm/swap.c:216 lru_add_drain_cpu+0x10e/0x8c0 mm/swap.c:644 lru_add_drain+0x121/0x3e0 mm/swap.c:744 __folio_batch_release+0x48/0xe0 mm/swap.c:1039 folio_batch_release include/linux/pagevec.h:83 [inline] shmem_undo_range+0x5d0/0x1a40 mm/shmem.c:1026 shmem_truncate_range mm/shmem.c:1135 [inline] shmem_evict_inode+0x273/0xa70 mm/shmem.c:1264 evict+0x486/0x870 fs/inode.c:705 __dentry_kill+0x431/0x650 fs/dcache.c:611 dentry_kill+0xb8/0x290 fs/dcache.c:-1 dput+0xfe/0x1e0 fs/dcache.c:918 do_renameat2+0x8b1/0xc70 fs/namei.c:5035 __do_sys_rename fs/namei.c:5079 [inline] __se_sys_rename fs/namei.c:5077 [inline] __x64_sys_rename+0x86/0x90 fs/namei.c:5077 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 Memory state around the buggy address: ffff88806c6b9e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88806c6b9f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88806c6b9f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88806c6ba000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88806c6ba080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================