ntfs3: loop3: NTFS 0.00 Gb is too big to use 32 bits per cluster. ================================================================== BUG: KASAN: use-after-free in memcmp+0x172/0x1c0 lib/string.c:681 Read of size 8 at addr ffff888090dde002 by task syz-executor.3/28583 CPU: 0 PID: 28583 Comm: syz-executor.3 Not tainted 6.5.0-rc4-syzkaller-00251-gf0ab9f34e59e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan/report.c:588 memcmp+0x172/0x1c0 lib/string.c:681 memcmp include/linux/fortify-string.h:728 [inline] ntfs_init_from_boot fs/ntfs3/super.c:860 [inline] ntfs_fill_super+0x6e0/0x43b0 fs/ntfs3/super.c:1141 get_tree_bdev+0x43e/0x7d0 fs/super.c:1318 vfs_get_tree+0x88/0x350 fs/super.c:1519 do_new_mount fs/namespace.c:3335 [inline] path_mount+0x1492/0x1ed0 fs/namespace.c:3662 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount fs/namespace.c:3861 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f52c047e1ea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f52c1291ee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f52c1291f80 RCX: 00007f52c047e1ea RDX: 0000000020000100 RSI: 0000000020000000 RDI: 00007f52c1291f40 RBP: 0000000020000100 R08: 00007f52c1291f80 R09: 000000000080001c R10: 000000000080001c R11: 0000000000000202 R12: 0000000020000000 R13: 00007f52c1291f40 R14: 000000000001f239 R15: 0000000020000200 The buggy address belongs to the physical page: page:ffffea0002437780 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x90dde flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000000 ffffea00011e3e08 ffffea0002207408 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 0x141cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_WRITE), pid 28500, tgid 28500 (syz-executor.1), ts 1962973706132, free_ts 1964447593598 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d2/0x350 mm/page_alloc.c:1570 prep_new_page mm/page_alloc.c:1577 [inline] get_page_from_freelist+0x10a9/0x31e0 mm/page_alloc.c:3221 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4477 alloc_pages+0x1a9/0x270 mm/mempolicy.c:2292 folio_alloc+0x1e/0x60 mm/mempolicy.c:2302 filemap_alloc_folio+0x3bb/0x490 mm/filemap.c:979 __filemap_get_folio+0x288/0x990 mm/filemap.c:1933 ext4_da_write_begin+0x3c7/0x8c0 fs/ext4/inode.c:2883 generic_perform_write+0x278/0x600 mm/filemap.c:3923 ext4_buffered_write_iter+0x11f/0x3c0 fs/ext4/file.c:299 ext4_file_write_iter+0x7ee/0x1950 fs/ext4/file.c:722 __kernel_write_iter+0x261/0x7e0 fs/read_write.c:517 dump_emit_page fs/coredump.c:888 [inline] dump_user_range+0x299/0x790 fs/coredump.c:915 elf_core_dump+0x2721/0x38e0 fs/binfmt_elf.c:2142 do_coredump+0x2c96/0x3fc0 fs/coredump.c:764 get_signal+0x2464/0x2770 kernel/signal.c:2867 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1161 [inline] free_unref_page_prepare+0x508/0xb90 mm/page_alloc.c:2348 free_unref_page_list+0xe6/0xb30 mm/page_alloc.c:2489 release_pages+0x32a/0x14e0 mm/swap.c:1042 __folio_batch_release+0x77/0xe0 mm/swap.c:1062 folio_batch_release include/linux/pagevec.h:83 [inline] truncate_inode_pages_range+0x33e/0xfb0 mm/truncate.c:372 ext4_evict_inode+0x2c5/0x1a30 fs/ext4/inode.c:193 evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1791 [inline] iput.part.0+0x55e/0x7a0 fs/inode.c:1817 iput+0x5c/0x80 fs/inode.c:1807 dentry_unlink_inode+0x292/0x430 fs/dcache.c:401 __dentry_kill+0x3b8/0x640 fs/dcache.c:607 dentry_kill fs/dcache.c:745 [inline] dput+0x703/0xfd0 fs/dcache.c:913 __fput+0x53c/0xac0 fs/file_table.c:392 task_work_run+0x14d/0x240 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa99/0x2a20 kernel/exit.c:874 do_group_exit+0xd4/0x2a0 kernel/exit.c:1024 Memory state around the buggy address: ffff888090dddf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888090dddf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888090dde000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888090dde080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888090dde100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 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