loop1: detected capacity change from 0 to 4096 ntfs3: loop1: Different NTFS sector size (4096) and media sector size (512). ntfs3: loop1: RAW NTFS volume: Filesystem size 16384.00 Gb > volume size 0.00 Gb. Mount in read-only. ntfs3: loop1: NTFS 16384.00 Gb is too big to use 32 bits per cluster. ================================================================== BUG: KASAN: use-after-free in memcmp lib/string.c:681 [inline] BUG: KASAN: use-after-free in bcmp+0xc0/0x1e0 lib/string.c:713 Read of size 8 at addr ffff88803dac0002 by task syz-executor.1/27183 CPU: 0 PID: 27183 Comm: syz-executor.1 Not tainted 6.6.0-rc6-syzkaller-00043-gdd72f9c7e512 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 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:858 [inline] ntfs_fill_super+0x9c2/0x4c50 fs/ntfs3/super.c:1139 get_tree_bdev+0x416/0x5b0 fs/super.c:1577 vfs_get_tree+0x8c/0x280 fs/super.c:1750 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: 0033:0x7f175c27e1ea 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:00007f175cfafee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f175cfaff80 RCX: 00007f175c27e1ea RDX: 000000002001f6c0 RSI: 0000000020000000 RDI: 00007f175cfaff40 RBP: 000000002001f6c0 R08: 00007f175cfaff80 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 00007f175cfaff40 R14: 000000000001f257 R15: 000000002001f540 The buggy address belongs to the physical page: page:ffffea0000f6b000 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x1 pfn:0x3dac0 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffff7f(buddy) raw: 00fff00000000000 ffffea0000ef6008 ffffea0002056c08 0000000000000000 raw: 0000000000000001 0000000000000004 00000000ffffff7f 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 7306, tgid 7268 (syz-executor.0), ts 316232862404, free_ts 316489547766 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0x31db/0x3360 mm/page_alloc.c:3170 __alloc_pages+0x255/0x670 mm/page_alloc.c:4426 __folio_alloc+0x13/0x30 mm/page_alloc.c:4458 vma_alloc_folio+0x48a/0x9a0 mm/mempolicy.c:2258 shmem_alloc_folio mm/shmem.c:1658 [inline] shmem_alloc_and_acct_folio+0x438/0x9b0 mm/shmem.c:1683 shmem_get_folio_gfp+0xca4/0x2b60 mm/shmem.c:2020 shmem_get_folio mm/shmem.c:2143 [inline] shmem_write_begin+0x170/0x300 mm/shmem.c:2688 generic_perform_write+0x31b/0x630 mm/filemap.c:3969 shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2865 call_write_iter include/linux/fs.h:1956 [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:1136 [inline] free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312 free_unref_page_list+0x596/0x830 mm/page_alloc.c:2451 release_pages+0x2113/0x23f0 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+0x6ad/0x19c0 mm/shmem.c:1022 shmem_truncate_range mm/shmem.c:1114 [inline] shmem_evict_inode+0x29e/0xa80 mm/shmem.c:1243 evict+0x2a4/0x620 fs/inode.c:664 __dentry_kill+0x436/0x650 fs/dcache.c:607 dentry_kill+0xbb/0x290 dput+0x21e/0x470 fs/dcache.c:913 __fput+0x60d/0x910 fs/file_table.c:392 __do_sys_close fs/open.c:1572 [inline] __se_sys_close+0x15f/0x220 fs/open.c:1557 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: ffff88803dabff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88803dabff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88803dac0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88803dac0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88803dac0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================