loop2: detected capacity change from 0 to 8185 ================================================================== BUG: KASAN: use-after-free in ntfs_is_extended_system_file fs/ntfs/inode.c:484 [inline] BUG: KASAN: use-after-free in ntfs_read_locked_inode+0x5714/0x5af0 fs/ntfs/inode.c:1023 Read of size 8 at addr ffff88805d848db8 by task syz-executor.2/12255 CPU: 0 PID: 12255 Comm: syz-executor.2 Not tainted 5.13.0-rc2-next-20210518-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x13e/0x1d6 lib/dump_stack.c:129 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:233 __kasan_report mm/kasan/report.c:419 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:436 ntfs_is_extended_system_file fs/ntfs/inode.c:484 [inline] ntfs_read_locked_inode+0x5714/0x5af0 fs/ntfs/inode.c:1023 ntfs_iget+0x12d/0x180 fs/ntfs/inode.c:177 load_and_init_upcase fs/ntfs/super.c:1655 [inline] load_system_files fs/ntfs/super.c:1810 [inline] ntfs_fill_super+0x1f75/0x84e0 fs/ntfs/super.c:2893 mount_bdev+0x34d/0x410 fs/super.c:1368 legacy_get_tree+0x105/0x220 fs/fs_context.c:592 vfs_get_tree+0x89/0x2f0 fs/super.c:1498 do_new_mount fs/namespace.c:2905 [inline] path_mount+0x132a/0x1fa0 fs/namespace.c:3235 do_mount fs/namespace.c:3248 [inline] __do_sys_mount fs/namespace.c:3456 [inline] __se_sys_mount fs/namespace.c:3433 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3433 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x467afa Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8af851dfa8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 0000000000467afa RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f8af851e000 RBP: 00007f8af851e040 R08: 00007f8af851e040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f8af851e000 R15: 0000000020086e00 The buggy address belongs to the page: page:ffffea0001761200 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x5d848 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea0001761388 ffffea0001760ec8 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 0x100cca(GFP_HIGHUSER_MOVABLE), pid 12249, ts 428841914903, free_ts 429069267659 prep_new_page mm/page_alloc.c:2377 [inline] get_page_from_freelist+0x125c/0x2ed0 mm/page_alloc.c:4038 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5239 alloc_pages_vma+0xdd/0x770 mm/mempolicy.c:2236 wp_page_copy+0x1bf/0x2270 mm/memory.c:2897 do_wp_page+0x2cb/0x1ad0 mm/memory.c:3204 handle_pte_fault mm/memory.c:4395 [inline] __handle_mm_fault+0x236b/0x5200 mm/memory.c:4512 handle_mm_fault+0x1b9/0x7e0 mm/memory.c:4610 do_user_addr_fault+0x483/0x1210 arch/x86/mm/fault.c:1390 handle_page_fault arch/x86/mm/fault.c:1475 [inline] exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1531 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:577 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1305 [inline] free_pcp_prepare+0x217/0x300 mm/page_alloc.c:1349 free_unref_page_prepare mm/page_alloc.c:3272 [inline] free_unref_page_list+0x19f/0x1050 mm/page_alloc.c:3340 release_pages+0x824/0x20b0 mm/swap.c:972 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:242 [inline] tlb_flush_mmu+0xe9/0x6b0 mm/mmu_gather.c:249 zap_pte_range mm/memory.c:1337 [inline] zap_pmd_range mm/memory.c:1375 [inline] zap_pud_range mm/memory.c:1404 [inline] zap_p4d_range mm/memory.c:1425 [inline] unmap_page_range+0x1a87/0x2660 mm/memory.c:1446 unmap_single_vma+0x198/0x300 mm/memory.c:1491 unmap_vmas+0x16d/0x2f0 mm/memory.c:1523 exit_mmap+0x1d0/0x620 mm/mmap.c:3201 __mmput+0x122/0x470 kernel/fork.c:1096 mmput+0x58/0x60 kernel/fork.c:1117 exit_mm kernel/exit.c:502 [inline] do_exit+0xb0a/0x2a70 kernel/exit.c:813 do_group_exit+0x125/0x310 kernel/exit.c:923 __do_sys_exit_group kernel/exit.c:934 [inline] __se_sys_exit_group kernel/exit.c:932 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:932 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae Memory state around the buggy address: ffff88805d848c80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88805d848d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88805d848d80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88805d848e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88805d848e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================