loop0: detected capacity change from 0 to 4096 ntfs: (device loop0): is_boot_sector_ntfs(): Invalid end of sector marker. ================================================================== BUG: KASAN: use-after-free in ntfs_attr_find+0x7d6/0xd50 fs/ntfs/attrib.c:609 Read of size 2 at addr ffff88805b95b042 by task syz.0.16/5019 CPU: 0 PID: 5019 Comm: syz.0.16 Not tainted 6.1.119-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:395 kasan_report+0x136/0x160 mm/kasan/report.c:495 ntfs_attr_find+0x7d6/0xd50 fs/ntfs/attrib.c:609 ntfs_attr_lookup+0x4e0/0x2390 ntfs_read_locked_inode+0xa34/0x49c0 fs/ntfs/inode.c:666 ntfs_read_inode_mount+0xda2/0x2660 fs/ntfs/inode.c:2098 ntfs_fill_super+0x1880/0x2bd0 fs/ntfs/super.c:2855 mount_bdev+0x2c9/0x3f0 fs/super.c:1443 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x2ba/0xb40 fs/namespace.c:3056 do_mount fs/namespace.c:3399 [inline] __do_sys_mount fs/namespace.c:3607 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3584 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f331258167a 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:00007f33133dde88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f33133ddf10 RCX: 00007f331258167a RDX: 00000000200000c0 RSI: 00000000200001c0 RDI: 00007f33133dded0 RBP: 00000000200000c0 R08: 00007f33133ddf10 R09: 0000000000000004 R10: 0000000000000004 R11: 0000000000000246 R12: 00000000200001c0 R13: 00007f33133dded0 R14: 000000000001f640 R15: 0000000020000100 The buggy address belongs to the physical page: page:ffffea00016e56c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x5b95b flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea00016e5708 ffff8880b8e411e0 0000000000000000 raw: 0000000000000001 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 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_ZERO), pid 5019, tgid 5018 (syz.0.16), ts 127382105888, free_ts 127426131168 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2517 prep_new_page mm/page_alloc.c:2524 [inline] get_page_from_freelist+0x3731/0x38d0 mm/page_alloc.c:4313 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5590 __folio_alloc+0xf/0x30 mm/page_alloc.c:5622 vma_alloc_folio+0x486/0x990 mm/mempolicy.c:2243 alloc_page_vma include/linux/gfp.h:284 [inline] do_anonymous_page mm/memory.c:4189 [inline] handle_pte_fault mm/memory.c:5027 [inline] __handle_mm_fault mm/memory.c:5171 [inline] handle_mm_fault+0x2e8e/0x5340 mm/memory.c:5292 do_user_addr_fault arch/x86/mm/fault.c:1340 [inline] handle_page_fault arch/x86/mm/fault.c:1431 [inline] exc_page_fault+0x26f/0x620 arch/x86/mm/fault.c:1487 asm_exc_page_fault+0x22/0x30 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:1444 [inline] free_pcp_prepare mm/page_alloc.c:1494 [inline] free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3369 free_unref_page_list+0x663/0x900 mm/page_alloc.c:3510 release_pages+0x2836/0x2b40 mm/swap.c:1055 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline] tlb_flush_mmu_free mm/mmu_gather.c:254 [inline] tlb_flush_mmu+0xfc/0x210 mm/mmu_gather.c:261 tlb_finish_mmu+0xce/0x1f0 mm/mmu_gather.c:361 unmap_region+0x29f/0x2f0 mm/mmap.c:2331 do_mas_align_munmap+0xef5/0x15a0 mm/mmap.c:2580 do_mas_munmap+0x246/0x2b0 mm/mmap.c:2638 __vm_munmap+0x268/0x370 mm/mmap.c:2924 __do_sys_munmap mm/mmap.c:2949 [inline] __se_sys_munmap mm/mmap.c:2946 [inline] __x64_sys_munmap+0x5c/0x70 mm/mmap.c:2946 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Memory state around the buggy address: ffff88805b95af00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805b95af80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805b95b000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88805b95b080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88805b95b100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================