loop2: detected capacity change from 0 to 4096 ntfs3: loop2: Different NTFS sector size (2048) and media sector size (512). ntfs3: loop2: RAW NTFS volume: Filesystem size 8192.00 Gb > volume size 0.00 Gb. Mount in read-only. ntfs3: loop2: NTFS 8192.00 Gb is too big to use 32 bits per cluster. ================================================================== BUG: KASAN: out-of-bounds in memcmp lib/string.c:681 [inline] BUG: KASAN: out-of-bounds in bcmp+0xc0/0x1e0 lib/string.c:713 Read of size 8 at addr ffff88808417d002 by task syz-executor.2/10095 CPU: 1 PID: 10095 Comm: syz-executor.2 Not tainted 6.5.0-rc7-syzkaller-00004-gf7757129e3de #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 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:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 memcmp lib/string.c:681 [inline] bcmp+0xc0/0x1e0 lib/string.c:713 ntfs_init_from_boot fs/ntfs3/super.c:860 [inline] ntfs_fill_super+0x9e6/0x4cb0 fs/ntfs3/super.c:1141 get_tree_bdev+0x468/0x6c0 fs/super.c:1318 vfs_get_tree+0x8c/0x270 fs/super.c:1519 do_new_mount+0x28f/0xae0 fs/namespace.c:3335 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861 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: 0033:0x7f013087e1ea 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:00007f013163eee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f013163ef80 RCX: 00007f013087e1ea RDX: 0000000020000180 RSI: 0000000020000000 RDI: 00007f013163ef40 RBP: 0000000020000180 R08: 00007f013163ef80 R09: 0000000000000044 R10: 0000000000000044 R11: 0000000000000202 R12: 0000000020000000 R13: 00007f013163ef40 R14: 000000000001f3c5 R15: 0000000020000040 The buggy address belongs to the physical page: page:ffffea0002105f40 refcount:1 mapcount:0 mapping:ffff88803cf5d508 index:0xabe pfn:0x8417d memcg:ffff88802ae80000 aops:shmem_aops ino:6d0 dentry name:"memfd:syzkaller" flags: 0xfff0000008001e(referenced|uptodate|dirty|lru|swapbacked|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff0000008001e ffffea00020664c8 ffffea00021cfa08 ffff88803cf5d508 raw: 0000000000000abe 0000000000000000 00000001ffffffff ffff88802ae80000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 10084, tgid 10083 (syz-executor.5), ts 492144784323, free_ts 492059007483 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1570 prep_new_page mm/page_alloc.c:1577 [inline] get_page_from_freelist+0x31e8/0x3370 mm/page_alloc.c:3221 __alloc_pages+0x255/0x670 mm/page_alloc.c:4477 __folio_alloc+0x13/0x30 mm/page_alloc.c:4509 vma_alloc_folio+0x48a/0x9a0 mm/mempolicy.c:2253 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+0x31b/0x630 mm/filemap.c:3923 generic_file_write_iter+0xaf/0x310 mm/filemap.c:4044 call_write_iter include/linux/fs.h:1877 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x782/0xaf0 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:1161 [inline] free_unref_page_prepare+0x903/0xa30 mm/page_alloc.c:2348 free_unref_page_list+0x596/0x830 mm/page_alloc.c:2489 release_pages+0x2193/0x2470 mm/swap.c:1042 __folio_batch_release+0x84/0x100 mm/swap.c:1062 folio_batch_release include/linux/pagevec.h:83 [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:664 __dentry_kill+0x436/0x650 fs/dcache.c:607 dentry_kill+0xbb/0x290 dput+0x1f3/0x420 fs/dcache.c:913 __fput+0x628/0x950 fs/file_table.c:392 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: ffff88808417cf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88808417cf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88808417d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88808417d080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88808417d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================