loop9: detected capacity change from 0 to 4096 ntfs3: loop9: Different NTFS' sector size (1024) and media sector size (512) ================================================================== BUG: KASAN: use-after-free in ntfs_iget5+0x14e/0x37d0 fs/ntfs3/inode.c:527 Read of size 8 at addr ffff88804c40a150 by task syz.9.902/9290 CPU: 1 PID: 9290 Comm: syz.9.902 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0xa8/0x210 mm/kasan/report.c:420 kasan_report+0x10b/0x140 mm/kasan/report.c:524 ntfs_iget5+0x14e/0x37d0 fs/ntfs3/inode.c:527 ntfs_fill_super+0x1b0f/0x3f30 fs/ntfs3/super.c:970 get_tree_bdev+0x3f1/0x610 fs/super.c:1366 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3078 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3606 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f5dffb90eea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5e00a34e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f5e00a34ef0 RCX: 00007f5dffb90eea RDX: 00002000000002c0 RSI: 0000200000000040 RDI: 00007f5e00a34eb0 RBP: 00002000000002c0 R08: 00007f5e00a34ef0 R09: 0000000000000082 R10: 0000000000000082 R11: 0000000000000246 R12: 0000200000000040 R13: 00007f5e00a34eb0 R14: 000000000001f84f R15: 00002000000000c0 Allocated by task 7251: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x6b/0x80 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x4b/0x480 mm/slab.h:737 slab_alloc_node mm/slub.c:3359 [inline] slab_alloc mm/slub.c:3367 [inline] __kmem_cache_alloc_lru mm/slub.c:3374 [inline] kmem_cache_alloc_lru+0x11a/0x2e0 mm/slub.c:3390 alloc_inode_sb include/linux/fs.h:3245 [inline] f2fs_alloc_inode+0x151/0x520 fs/f2fs/super.c:1419 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x5f/0x1c0 fs/inode.c:1063 new_inode+0x25/0x1c0 fs/inode.c:1091 f2fs_new_inode+0xcb/0x1040 fs/f2fs/namei.c:191 f2fs_mkdir+0x129/0x560 fs/f2fs/namei.c:700 vfs_mkdir+0x387/0x570 fs/namei.c:4114 do_mkdirat+0x1d0/0x430 fs/namei.c:4139 __do_sys_mkdir fs/namei.c:4159 [inline] __se_sys_mkdir fs/namei.c:4157 [inline] __x64_sys_mkdir+0x6a/0x80 fs/namei.c:4157 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:486 call_rcu+0x154/0x980 kernel/rcu/tree.c:2849 destroy_inode fs/inode.c:316 [inline] evict+0x7da/0x870 fs/inode.c:720 dispose_list fs/inode.c:738 [inline] evict_inodes+0x604/0x690 fs/inode.c:792 generic_shutdown_super+0x93/0x340 fs/super.c:480 kill_block_super+0x7c/0xe0 fs/super.c:1470 kill_f2fs_super+0x2ed/0x3a0 fs/f2fs/super.c:4688 deactivate_locked_super+0x93/0xf0 fs/super.c:332 cleanup_mnt+0x463/0x4f0 fs/namespace.c:1191 task_work_run+0x1ca/0x250 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Second to last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:486 call_rcu+0x154/0x980 kernel/rcu/tree.c:2849 destroy_inode fs/inode.c:316 [inline] evict+0x7da/0x870 fs/inode.c:720 f2fs_fill_super+0x54a1/0x6b20 fs/f2fs/super.c:4592 mount_bdev+0x287/0x3c0 fs/super.c:1443 legacy_get_tree+0xe6/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3078 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3606 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88804c409aa0 which belongs to the cache f2fs_inode_cache of size 2144 The buggy address is located 1712 bytes inside of 2144-byte region [ffff88804c409aa0, ffff88804c40a300) The buggy address belongs to the physical page: page:ffffea0001310200 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88804c40e1a0 pfn:0x4c408 head:ffffea0001310200 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff888028471601 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff88801a32c280 raw: ffff88804c40e1a0 00000000800e0009 00000001ffffffff ffff888028471601 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5272, tgid 5271 (syz.4.167), ts 132356222504, free_ts 110884953744 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2532 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x1a26/0x1ac0 mm/page_alloc.c:4328 __alloc_pages+0x1df/0x4e0 mm/page_alloc.c:5614 alloc_slab_page+0x5d/0x160 mm/slub.c:1799 allocate_slab mm/slub.c:1944 [inline] new_slab+0x87/0x2c0 mm/slub.c:1997 ___slab_alloc+0xbc6/0x1230 mm/slub.c:3154 __slab_alloc mm/slub.c:3240 [inline] slab_alloc_node mm/slub.c:3325 [inline] slab_alloc mm/slub.c:3367 [inline] __kmem_cache_alloc_lru mm/slub.c:3374 [inline] kmem_cache_alloc_lru+0x1ae/0x2e0 mm/slub.c:3390 alloc_inode_sb include/linux/fs.h:3245 [inline] f2fs_alloc_inode+0x151/0x520 fs/f2fs/super.c:1419 alloc_inode fs/inode.c:261 [inline] iget_locked+0x1a9/0x830 fs/inode.c:1373 f2fs_iget+0x52/0x4b30 fs/f2fs/inode.c:490 f2fs_fill_super+0x4849/0x6b20 fs/f2fs/super.c:4409 mount_bdev+0x287/0x3c0 fs/super.c:1443 legacy_get_tree+0xe6/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3078 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3606 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] __free_pages_ok+0xb46/0xc40 mm/page_alloc.c:1715 free_large_kmalloc+0xfd/0x190 mm/slab_common.c:913 kmem_free fs/xfs/kmem.h:62 [inline] xlog_write_log_records+0x348/0x3c0 fs/xfs/xfs_log_recover.c:1586 xlog_clear_stale_blocks+0x246/0x420 fs/xfs/xfs_log_recover.c:1681 xlog_find_tail+0x7ac/0xa00 fs/xfs/xfs_log_recover.c:1365 xlog_recover+0x48/0x450 fs/xfs/xfs_log_recover.c:3385 xfs_log_mount+0x2ba/0x460 fs/xfs/xfs_log.c:716 xfs_mountfs+0xc42/0x1d10 fs/xfs/xfs_mount.c:819 xfs_fs_fill_super+0x10f0/0x1350 fs/xfs/xfs_super.c:1690 get_tree_bdev+0x3f1/0x610 fs/super.c:1366 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3078 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3606 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Memory state around the buggy address: ffff88804c40a000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804c40a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88804c40a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88804c40a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804c40a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================