Hello, syzbot found the following issue on: HEAD commit: 489fa31ea873 Merge branch 'work.misc' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=101dd650c80000 kernel config: https://syzkaller.appspot.com/x/.config?x=cbfa7a73c540248d dashboard link: https://syzkaller.appspot.com/bug?extid=ef50f8eb00b54feb7ba2 compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=145580a8c80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1505a9f7480000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6bea5d39bf58/disk-489fa31e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/265538df6fa2/vmlinux-489fa31e.xz kernel image: https://storage.googleapis.com/syzbot-assets/8f0a643c86ea/bzImage-489fa31e.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/b7a87da8b417/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ef50f8eb00b54feb7ba2@xxxxxxxxxxxxxxxxxxxxxxxxx ntfs: (device loop0): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 0x4002. syz-executor392: attempt to access beyond end of device loop0: rw=0, sector=32774, nr_sectors = 2 limit=4096 ntfs: (device loop0): ntfs_end_buffer_async_read(): Buffer I/O error, logical block 0x4003. ntfs: (device loop0): check_mft_mirror(): Failed to read $MFTMirr. ntfs: (device loop0): load_system_files(): $MFTMirr does not match $MFT. Will not be able to remount read-write. Run ntfsfix and/or chkdsk. ================================================================== BUG: KASAN: use-after-free in ntfs_attr_find+0x7d6/0xd50 fs/ntfs/attrib.c:609 Read of size 2 at addr ffff888074945152 by task syz-executor392/5071 CPU: 0 PID: 5071 Comm: syz-executor392 Not tainted 6.2.0-syzkaller-10827-g489fa31ea873 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Call Trace: <TASK> __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:319 [inline] print_report+0x163/0x540 mm/kasan/report.c:430 kasan_report+0x143/0x170 mm/kasan/report.c:536 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 load_system_files+0x1333/0x4840 fs/ntfs/super.c:1808 ntfs_fill_super+0x19b4/0x2bd0 fs/ntfs/super.c:2900 mount_bdev+0x271/0x3a0 fs/super.c:1371 legacy_get_tree+0xef/0x190 fs/fs_context.c:610 vfs_get_tree+0x8c/0x270 fs/super.c:1501 do_new_mount+0x28f/0xae0 fs/namespace.c:3042 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3571 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: 0033:0x7fd8fb0684fa Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 f8 03 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:00007ffc35f01968 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fd8fb0684fa RDX: 000000002001f6c0 RSI: 000000002001f640 RDI: 00007ffc35f01970 RBP: 00007ffc35f01970 R08: 00007ffc35f019b0 R09: 000000000001f61d R10: 0000000000008703 R11: 0000000000000286 R12: 0000000000000004 R13: 0000555555fa63b8 R14: 00007ffc35f019b0 R15: 0000000000000000 </TASK> The buggy address belongs to the physical page: page:ffffea0001d25140 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x74945 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea0001d24dc8 ffffea0001d246c8 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 5071, tgid 5071 (syz-executor392), ts 54020629953, free_ts 54043005684 prep_new_page mm/page_alloc.c:2552 [inline] get_page_from_freelist+0x37e0/0x3970 mm/page_alloc.c:4325 __alloc_pages+0x291/0x7f0 mm/page_alloc.c:5591 __folio_alloc+0x13/0x30 mm/page_alloc.c:5623 vma_alloc_folio+0x48a/0x9a0 mm/mempolicy.c:2244 wp_page_copy mm/memory.c:3064 [inline] do_wp_page+0xb09/0x3620 mm/memory.c:3426 handle_pte_fault mm/memory.c:4927 [inline] __handle_mm_fault mm/memory.c:5051 [inline] handle_mm_fault+0x23a0/0x51c0 mm/memory.c:5197 do_user_addr_fault arch/x86/mm/fault.c:1407 [inline] handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x685/0x8a0 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1453 [inline] free_pcp_prepare mm/page_alloc.c:1503 [inline] free_unref_page_prepare+0xf0e/0xf70 mm/page_alloc.c:3387 free_unref_page_list+0x6be/0x960 mm/page_alloc.c:3528 release_pages+0x219e/0x2470 mm/swap.c:1042 tlb_batch_pages_flush mm/mmu_gather.c:97 [inline] tlb_flush_mmu_free mm/mmu_gather.c:292 [inline] tlb_flush_mmu+0x100/0x210 mm/mmu_gather.c:299 tlb_finish_mmu+0xd4/0x1f0 mm/mmu_gather.c:391 unmap_region+0x253/0x2a0 mm/mmap.c:2146 do_vmi_align_munmap+0xba3/0x1200 mm/mmap.c:2395 do_vmi_munmap+0x24a/0x2b0 mm/mmap.c:2452 __vm_munmap+0x200/0x310 mm/mmap.c:2731 __do_sys_munmap mm/mmap.c:2756 [inline] __se_sys_munmap mm/mmap.c:2753 [inline] __x64_sys_munmap+0x60/0x70 mm/mmap.c:2753 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 Memory state around the buggy address: ffff888074945000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888074945080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888074945100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888074945180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888074945200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== --- This report is generated by a bot. 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