loop0: detected capacity change from 0 to 4096 ================================================================== BUG: KASAN: slab-out-of-bounds in ntfs_iget5+0x14a/0x3760 fs/ntfs3/inode.c:528 Read of size 8 at addr ffff888067327f60 by task syz.0.1852/8031 CPU: 0 PID: 8031 Comm: syz.0.1852 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 ntfs_iget5+0x14a/0x3760 fs/ntfs3/inode.c:528 ntfs_fill_super+0x1db1/0x37b0 fs/ntfs3/super.c:1004 get_tree_bdev+0x3f1/0x610 fs/super.c:1325 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x24a/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f5ea06fc0ca Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5e9e953e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f5e9e953ee0 RCX: 00007f5ea06fc0ca RDX: 000020000001f6c0 RSI: 00002000000001c0 RDI: 00007f5e9e953ea0 RBP: 000020000001f6c0 R08: 00007f5e9e953ee0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00002000000001c0 R13: 00007f5e9e953ea0 R14: 000000000001f732 R15: 0000200000002dc0 Allocated by task 7988: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x9c/0xd0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3225 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3238 kmem_cache_zalloc include/linux/slab.h:728 [inline] alloc_buffer_head+0x21/0x100 fs/buffer.c:3311 alloc_page_buffers+0x341/0x600 fs/buffer.c:832 grow_dev_page fs/buffer.c:968 [inline] grow_buffers fs/buffer.c:1014 [inline] __getblk_slow fs/buffer.c:1041 [inline] __getblk_gfp+0x4cc/0xb60 fs/buffer.c:1336 __getblk include/linux/buffer_head.h:416 [inline] do_readahead fs/jbd2/recovery.c:94 [inline] jread+0x344/0x970 fs/jbd2/recovery.c:158 do_one_pass+0x326/0x2e30 fs/jbd2/recovery.c:526 jbd2_journal_skip_recovery+0x4d/0x130 fs/jbd2/recovery.c:361 jbd2_journal_wipe+0x43a/0x5f0 fs/jbd2/journal.c:2558 ocfs2_journal_wipe+0xa0/0x280 fs/ocfs2/journal.c:1152 ocfs2_check_volume fs/ocfs2/super.c:2422 [inline] ocfs2_mount_volume+0xae4/0x15a0 fs/ocfs2/super.c:1822 ocfs2_fill_super+0x2ee2/0x50f0 fs/ocfs2/super.c:1083 mount_bdev+0x287/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x24a/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 4490: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1710 [inline] slab_free_freelist_hook+0xea/0x170 mm/slub.c:1736 slab_free mm/slub.c:3504 [inline] kmem_cache_free+0x8f/0x210 mm/slub.c:3520 free_buffer_head+0x45/0xb0 fs/buffer.c:3327 try_to_free_buffers+0x3b4/0x4e0 fs/buffer.c:3268 do_invalidatepage mm/truncate.c:157 [inline] truncate_cleanup_page+0x170/0x420 mm/truncate.c:176 truncate_inode_pages_range+0x292/0xfe0 mm/truncate.c:325 kill_bdev block/bdev.c:77 [inline] blkdev_flush_mapping+0x188/0x360 block/bdev.c:659 blkdev_put_whole block/bdev.c:690 [inline] blkdev_put+0x4d1/0x7d0 block/bdev.c:957 blkdev_close+0x76/0xa0 block/fops.c:478 __fput+0x234/0x930 fs/file_table.c:311 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff888067327e80 which belongs to the cache buffer_head of size 168 The buggy address is located 56 bytes to the right of 168-byte region [ffff888067327e80, ffff888067327f28) The buggy address belongs to the page: page:ffffea00019cc9c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x67327 memcg:ffff88801bbb4401 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 0000000b00000001 ffff88801794ca00 raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bbb4401 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x112c50(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5448, ts 119329231395, free_ts 83937208383 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501 alloc_slab_page mm/slub.c:1780 [inline] allocate_slab mm/slub.c:1917 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1980 ___slab_alloc+0x80a/0xdd0 mm/slub.c:3013 __slab_alloc mm/slub.c:3100 [inline] slab_alloc_node mm/slub.c:3191 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x195/0x290 mm/slub.c:3238 kmem_cache_zalloc include/linux/slab.h:728 [inline] alloc_buffer_head+0x21/0x100 fs/buffer.c:3311 alloc_page_buffers+0x341/0x600 fs/buffer.c:832 grow_dev_page fs/buffer.c:968 [inline] grow_buffers fs/buffer.c:1014 [inline] __getblk_slow fs/buffer.c:1041 [inline] __getblk_gfp+0x4cc/0xb60 fs/buffer.c:1336 __bread_gfp+0x28/0x380 fs/buffer.c:1381 sb_bread_unmovable include/linux/buffer_head.h:343 [inline] ntfs_bread fs/ntfs3/fsntfs.c:1002 [inline] ntfs_read_run_nb+0x4aa/0xde0 fs/ntfs3/fsntfs.c:1222 ntfs_read_bh+0x3c/0x7c0 fs/ntfs3/fsntfs.c:1296 mi_read+0x19a/0x590 fs/ntfs3/record.c:133 ntfs_read_mft fs/ntfs3/inode.c:69 [inline] ntfs_iget5+0x44c/0x3760 fs/ntfs3/inode.c:527 ntfs_fill_super+0x1789/0x37b0 fs/ntfs3/super.c:941 get_tree_bdev+0x3f1/0x610 fs/super.c:1325 vfs_get_tree+0x88/0x270 fs/super.c:1530 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396 free_slab mm/slub.c:2020 [inline] discard_slab mm/slub.c:2026 [inline] __unfreeze_partials+0x1a5/0x200 mm/slub.c:2512 put_cpu_partial+0x12d/0x190 mm/slub.c:2592 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3225 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3238 getname_flags+0xb5/0x500 fs/namei.c:138 user_path_at_empty+0x2a/0x190 fs/namei.c:2890 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0x107/0x500 fs/stat.c:221 vfs_fstatat fs/stat.c:243 [inline] __do_sys_newfstatat fs/stat.c:411 [inline] __se_sys_newfstatat fs/stat.c:405 [inline] __x64_sys_newfstatat+0x15f/0x200 fs/stat.c:405 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Memory state around the buggy address: ffff888067327e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888067327e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888067327f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc ^ ffff888067327f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888067328000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================