loop4: detected capacity change from 0 to 16491 ntfs: volume version 3.1. ================================================================== BUG: KASAN: use-after-free in ntfs_attr_find+0x91a/0xd80 fs/ntfs/attrib.c:597 Read of size 2 at addr ffff88805b9808a4 by task syz-executor.4/14423 CPU: 1 PID: 14423 Comm: syz-executor.4 Not tainted 6.0.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:317 print_report+0x108/0x1f0 mm/kasan/report.c:433 kasan_report+0xc3/0xf0 mm/kasan/report.c:495 ntfs_attr_find+0x91a/0xd80 fs/ntfs/attrib.c:597 ntfs_attr_lookup+0x4c3/0x2370 ntfs_read_locked_inode+0xa26/0x47c0 fs/ntfs/inode.c:666 ntfs_iget+0x10f/0x190 fs/ntfs/inode.c:177 load_and_check_logfile+0x3f/0xd0 fs/ntfs/super.c:1208 load_system_files+0x31f4/0x47e0 fs/ntfs/super.c:1941 ntfs_fill_super+0x19a9/0x2bf0 fs/ntfs/super.c:2891 mount_bdev+0x26c/0x3a0 fs/super.c:1400 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff2f408a93a 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:00007ff2f518bf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007ff2f408a93a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ff2f518bfe0 RBP: 00007ff2f518c020 R08: 00007ff2f518c020 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 00007ff2f518bfe0 R15: 0000000020000040 The buggy address belongs to the physical page: page:ffffea00016e6000 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x5b980 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 dead000000000100 dead000000000122 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 14220, tgid 14213 (syz-executor.3), ts 332967345048, free_ts 333463802598 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5515 __folio_alloc+0xf/0x30 mm/page_alloc.c:5546 vma_alloc_folio+0x662/0xb60 mm/mempolicy.c:2231 shmem_alloc_folio mm/shmem.c:1557 [inline] shmem_alloc_and_acct_folio+0x5a4/0xd90 mm/shmem.c:1587 shmem_getpage_gfp+0x8dc/0x3410 mm/shmem.c:1921 shmem_getpage mm/shmem.c:150 [inline] shmem_write_begin+0xcc/0x1a0 mm/shmem.c:2512 generic_perform_write+0x2a8/0x5b0 mm/filemap.c:3738 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3866 generic_file_write_iter+0xab/0x310 mm/filemap.c:3898 call_write_iter include/linux/fs.h:2187 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x7dc/0xc50 fs/read_write.c:578 ksys_pwrite64 fs/read_write.c:693 [inline] __do_sys_pwrite64 fs/read_write.c:703 [inline] __se_sys_pwrite64 fs/read_write.c:700 [inline] __x64_sys_pwrite64+0x1af/0x240 fs/read_write.c:700 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 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:1449 [inline] free_pcp_prepare+0x812/0x900 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page_list+0xb4/0x7b0 mm/page_alloc.c:3522 release_pages+0x22c3/0x2540 mm/swap.c:1012 __pagevec_release+0x7d/0xf0 mm/swap.c:1032 pagevec_release include/linux/pagevec.h:71 [inline] folio_batch_release include/linux/pagevec.h:135 [inline] shmem_undo_range+0x84a/0x2510 mm/shmem.c:956 shmem_truncate_range mm/shmem.c:1044 [inline] shmem_evict_inode+0x279/0xa90 mm/shmem.c:1142 evict+0x2a4/0x620 fs/inode.c:665 __dentry_kill+0x3b1/0x5b0 fs/dcache.c:607 dentry_kill+0xbb/0x290 dput+0x1f3/0x410 fs/dcache.c:913 __fput+0x5a8/0x820 fs/file_table.c:333 task_work_run+0x146/0x1c0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:169 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:294 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 Memory state around the buggy address: ffff88805b980780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88805b980800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88805b980880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88805b980900: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88805b980980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================