loop0: detected capacity change from 0 to 4096 ntfs3: loop0: Different NTFS' sector size (2048) and media sector size (512) ================================================================== BUG: KASAN: use-after-free in ntfs_iget5+0x120/0x2b10 fs/ntfs3/inode.c:526 Read of size 8 at addr ffff0000f7328600 by task syz.0.6059/17491 CPU: 0 PID: 17491 Comm: syz.0.6059 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 print_address_description+0x88/0x218 mm/kasan/report.c:316 print_report+0x50/0x68 mm/kasan/report.c:420 kasan_report+0xa8/0x100 mm/kasan/report.c:524 __asan_report_load8_noabort+0x2c/0x38 mm/kasan/report_generic.c:351 ntfs_iget5+0x120/0x2b10 fs/ntfs3/inode.c:526 ntfs_fill_super+0x1a64/0x32ac fs/ntfs3/super.c:1033 get_tree_bdev+0x358/0x544 fs/super.c:1366 ntfs_fs_get_tree+0x28/0x38 fs/ntfs3/super.c:1383 vfs_get_tree+0x90/0x274 fs/super.c:1573 do_new_mount+0x228/0x810 fs/namespace.c:3078 path_mount+0x5b4/0xe78 fs/namespace.c:3408 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount fs/namespace.c:3606 [inline] __arm64_sys_mount+0x49c/0x584 fs/namespace.c:3606 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Allocated by task 6751: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x28/0x34 mm/kasan/generic.c:505 __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x74/0x43c 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+0x1b0/0x298 mm/slub.c:3390 alloc_inode_sb include/linux/fs.h:3245 [inline] reiserfs_alloc_inode+0x2c/0xc4 fs/reiserfs/super.c:642 alloc_inode fs/inode.c:261 [inline] iget5_locked+0xa4/0x228 fs/inode.c:1328 reiserfs_fill_super+0xe2c/0x1d40 fs/reiserfs/super.c:2053 mount_bdev+0x264/0x358 fs/super.c:1443 get_super_block+0x44/0x58 fs/reiserfs/super.c:2601 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632 vfs_get_tree+0x90/0x274 fs/super.c:1573 do_new_mount+0x228/0x810 fs/namespace.c:3078 path_mount+0x5b4/0xe78 fs/namespace.c:3408 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount fs/namespace.c:3606 [inline] __arm64_sys_mount+0x49c/0x584 fs/namespace.c:3606 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:45 __kasan_record_aux_stack+0xc0/0xdc mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 call_rcu+0x100/0x954 kernel/rcu/tree.c:2849 destroy_inode fs/inode.c:316 [inline] evict+0x748/0x810 fs/inode.c:720 iput_final fs/inode.c:1834 [inline] iput+0x764/0x7f4 fs/inode.c:1860 reiserfs_fill_super+0x105c/0x1d40 fs/reiserfs/super.c:2078 mount_bdev+0x264/0x358 fs/super.c:1443 get_super_block+0x44/0x58 fs/reiserfs/super.c:2601 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632 vfs_get_tree+0x90/0x274 fs/super.c:1573 do_new_mount+0x228/0x810 fs/namespace.c:3078 path_mount+0x5b4/0xe78 fs/namespace.c:3408 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount fs/namespace.c:3606 [inline] __arm64_sys_mount+0x49c/0x584 fs/namespace.c:3606 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 The buggy address belongs to the object at ffff0000f7328000 which belongs to the cache reiser_inode_cache of size 1568 The buggy address is located 1536 bytes inside of 1568-byte region [ffff0000f7328000, ffff0000f7328620) The buggy address belongs to the physical page: page:000000006058fb6a refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff0000f732a7c0 pfn:0x137328 head:000000006058fb6a order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff0000d32de401 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c4b33b00 raw: ffff0000f732a7c0 000000008013000e 00000001ffffffff ffff0000d32de401 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000f7328500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000f7328580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000f7328600: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000f7328680: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000f7328700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== Unable to handle kernel paging request at virtual address dfff800000000002 KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 [dfff800000000002] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 17491 Comm: syz.0.6059 Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : ntfs_iget5+0x12c/0x2b10 fs/ntfs3/inode.c:526 lr : ntfs_iget5+0x120/0x2b10 fs/ntfs3/inode.c:526 sp : ffff8000217a7600 x29: ffff8000217a7820 x28: ffff0000f58c4000 x27: ffff0000db9561e8 x26: ffff8000217a7780 x25: dfff800000000000 x24: ffff7000042f4ef0 x23: ffff800011dd3780 x22: 0000000000000010 x21: 0000000000000002 x20: ffff0000f7328830 x19: 0000000000000000 x18: ffff800011abbcc0 x17: 1fffe00033ed797e x16: ffff800008042d90 x15: 0000000040000000 x14: 0000000000000002 x13: 0000000000ff0100 x12: 0000000000080000 x11: 000000000003531d x10: ffff8000217ba000 x9 : 0000000000000000 x8 : 0000000000000002 x7 : 0000000000000004 x6 : ffff800008251e80 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800008191794 x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000001 Call trace: ntfs_iget5+0x12c/0x2b10 fs/ntfs3/inode.c:526 ntfs_fill_super+0x1a64/0x32ac fs/ntfs3/super.c:1033 get_tree_bdev+0x358/0x544 fs/super.c:1366 ntfs_fs_get_tree+0x28/0x38 fs/ntfs3/super.c:1383 vfs_get_tree+0x90/0x274 fs/super.c:1573 do_new_mount+0x228/0x810 fs/namespace.c:3078 path_mount+0x5b4/0xe78 fs/namespace.c:3408 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount fs/namespace.c:3606 [inline] __arm64_sys_mount+0x49c/0x584 fs/namespace.c:3606 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Code: 97cc3973 f94002c8 91004116 d343fec8 (38f96908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 97cc3973 bl 0xffffffffff30e5cc 4: f94002c8 ldr x8, [x22] 8: 91004116 add x22, x8, #0x10 c: d343fec8 lsr x8, x22, #3 * 10: 38f96908 ldrsb w8, [x8, x25] <-- trapping instruction