loop3: detected capacity change from 0 to 190 ntfs: volume version 3.1. ================================================================== BUG: KASAN: use-after-free in ntfs_attr_find+0x7d6/0xd50 fs/ntfs/attrib.c:609 Read of size 2 at addr ffff88804d7480ea by task syz-executor.3/15956 CPU: 1 PID: 15956 Comm: syz-executor.3 Not tainted 6.4.0-rc3-syzkaller-00032-g933174ae28ba #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:351 [inline] print_report+0x163/0x540 mm/kasan/report.c:462 kasan_report+0x176/0x1b0 mm/kasan/report.c:572 ntfs_attr_find+0x7d6/0xd50 fs/ntfs/attrib.c:609 ntfs_attr_lookup+0x4e4/0x2390 ntfs_read_locked_attr_inode fs/ntfs/inode.c:1239 [inline] ntfs_attr_iget+0x50a/0x2360 fs/ntfs/inode.c:238 ntfs_read_locked_inode+0x33d5/0x49c0 fs/ntfs/inode.c:960 ntfs_iget+0x113/0x190 fs/ntfs/inode.c:177 load_system_files+0x3528/0x4840 fs/ntfs/super.c:1982 ntfs_fill_super+0x19b3/0x2bd0 fs/ntfs/super.c:2900 mount_bdev+0x274/0x3a0 fs/super.c:1380 legacy_get_tree+0xef/0x190 fs/fs_context.c:610 vfs_get_tree+0x8c/0x270 fs/super.c:1510 do_new_mount+0x28f/0xae0 fs/namespace.c:3039 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fac6608d69a Code: 48 c7 c2 b8 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fac66d63f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000000099d RCX: 00007fac6608d69a RDX: 000000002001f1c0 RSI: 0000000020000040 RDI: 00007fac66d63fe0 RBP: 00007fac66d64020 R08: 00007fac66d64020 R09: 000000000000000f R10: 000000000000000f R11: 0000000000000202 R12: 000000002001f1c0 R13: 0000000020000040 R14: 00007fac66d63fe0 R15: 0000000020000140 The buggy address belongs to the physical page: page:ffffea000135d200 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x4d748 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000000 ffffea000133b208 ffffea0000f5a888 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 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 15854, tgid 15849 (syz-executor.4), ts 2171800607041, free_ts 2173042545481 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1731 prep_new_page mm/page_alloc.c:1738 [inline] get_page_from_freelist+0x321c/0x33a0 mm/page_alloc.c:3502 __alloc_pages+0x255/0x670 mm/page_alloc.c:4768 __folio_alloc+0x13/0x30 mm/page_alloc.c:4800 vma_alloc_folio+0x48a/0x9a0 mm/mempolicy.c:2240 shmem_alloc_folio mm/shmem.c:1579 [inline] shmem_alloc_and_acct_folio+0x5e7/0xe10 mm/shmem.c:1603 shmem_get_folio_gfp+0x120f/0x3470 mm/shmem.c:1948 shmem_get_folio mm/shmem.c:2079 [inline] shmem_write_begin+0x172/0x4e0 mm/shmem.c:2573 generic_perform_write+0x300/0x5e0 mm/filemap.c:3923 __generic_file_write_iter+0x17a/0x400 mm/filemap.c:4051 generic_file_write_iter+0xaf/0x310 mm/filemap.c:4083 call_write_iter include/linux/fs.h:1868 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x790/0xb20 fs/read_write.c:584 ksys_write+0x1a0/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x903/0xa30 mm/page_alloc.c:2564 free_unref_page_list+0x596/0x830 mm/page_alloc.c:2705 release_pages+0x2193/0x2470 mm/swap.c:1042 __pagevec_release+0x84/0x100 mm/swap.c:1062 pagevec_release include/linux/pagevec.h:63 [inline] folio_batch_release include/linux/pagevec.h:132 [inline] shmem_undo_range+0x6af/0x1ba0 mm/shmem.c:954 shmem_truncate_range mm/shmem.c:1049 [inline] shmem_evict_inode+0x258/0x9f0 mm/shmem.c:1164 evict+0x2a4/0x620 fs/inode.c:665 __dentry_kill+0x436/0x650 fs/dcache.c:607 dentry_kill+0xbb/0x290 dput+0x1f3/0x420 fs/dcache.c:913 __fput+0x5e4/0x890 fs/file_table.c:329 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 Memory state around the buggy address: ffff88804d747f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88804d748000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88804d748080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88804d748100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88804d748180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================