ntfs: (device loop4): ntfs_ucstonls(): Unicode name contains characters that cannot be converted to character set cp857. You might want to try to use the mount option nls=utf8. ntfs: (device loop4): ntfs_filldir(): Skipping unrepresentable inode 0x4. ================================================================== BUG: KASAN: slab-out-of-bounds in ntfs_filldir fs/ntfs/dir.c:1021 [inline] BUG: KASAN: slab-out-of-bounds in ntfs_readdir+0xdda/0x3550 fs/ntfs/dir.c:1200 Read of size 1 at addr ffff888021c62d99 by task syz-executor/4192 CPU: 1 PID: 4192 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x168/0x230 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_filldir fs/ntfs/dir.c:1021 [inline] ntfs_readdir+0xdda/0x3550 fs/ntfs/dir.c:1200 iterate_dir+0x218/0x560 fs/readdir.c:-1 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64+0xe5/0x260 fs/readdir.c:354 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: 0033:0x7efda4468933 Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 52 3d f8 ff 66 90 b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 c7 c2 a8 ff ff ff f7 d8 RSP: 002b:00007ffc16391fc8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 0000555583c62640 RCX: 00007efda4468933 RDX: 0000000000008000 RSI: 0000555583c62640 RDI: 0000000000000006 RBP: 0000555583c62614 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8 R13: 0000000000000016 R14: 0000555583c62610 R15: 00007ffc16395370 Allocated by task 4192: 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_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc+0xb5/0xf0 mm/kasan/common.c:522 kmalloc include/linux/slab.h:612 [inline] ntfs_readdir+0x798/0x3550 fs/ntfs/dir.c:1162 iterate_dir+0x218/0x560 fs/readdir.c:-1 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64+0xe5/0x260 fs/readdir.c:354 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 Last potentially related work creation: kasan_save_stack+0x35/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:3011 [inline] call_rcu+0x182/0x930 kernel/rcu/tree.c:3091 percpu_ref_put_many include/linux/percpu-refcount.h:322 [inline] percpu_ref_put+0x1f6/0x200 include/linux/percpu-refcount.h:338 rcu_do_batch kernel/rcu/tree.c:2523 [inline] rcu_core+0x962/0x15d0 kernel/rcu/tree.c:2763 handle_softirqs+0x328/0x820 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 The buggy address belongs to the object at ffff888021c62c00 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 409 bytes inside of 512-byte region [ffff888021c62c00, ffff888021c62e00) The buggy address belongs to the page: page:ffffea0000871800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x21c60 head:ffffea0000871800 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888016841c80 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 9, ts 9169585130, free_ts 0 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192 __alloc_pages+0x1e1/0x470 mm/page_alloc.c:5487 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+0x81e/0xdf0 mm/slub.c:3013 __slab_alloc mm/slub.c:3100 [inline] slab_alloc_node mm/slub.c:3191 [inline] kmem_cache_alloc_node_trace+0x1dd/0x300 mm/slub.c:3275 kmalloc_node include/linux/slab.h:625 [inline] kzalloc_node include/linux/slab.h:749 [inline] blkg_alloc+0xad/0x660 block/blk-cgroup.c:158 blkcg_init_queue+0x26/0x430 block/blk-cgroup.c:1198 blk_alloc_queue+0x439/0x5a0 block/blk-core.c:582 blk_mq_init_queue_data block/blk-mq.c:3150 [inline] blk_mq_init_queue+0x33/0xd0 block/blk-mq.c:3164 scsi_alloc_sdev+0x6f2/0xab0 drivers/scsi/scsi_scan.c:319 scsi_probe_and_add_lun+0x1bf/0x3d00 drivers/scsi/scsi_scan.c:1157 __scsi_scan_target+0x1d8/0x1010 drivers/scsi/scsi_scan.c:1638 scsi_scan_channel drivers/scsi/scsi_scan.c:1726 [inline] scsi_scan_host_selected+0x36e/0x690 drivers/scsi/scsi_scan.c:1755 do_scsi_scan_host drivers/scsi/scsi_scan.c:1894 [inline] do_scan_async+0x11a/0x700 drivers/scsi/scsi_scan.c:1904 async_run_entry_fn+0x9f/0x3e0 kernel/async.c:127 process_one_work+0x863/0x1000 kernel/workqueue.c:2310 page_owner free stack trace missing Memory state around the buggy address: ffff888021c62c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888021c62d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc >ffff888021c62d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888021c62e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888021c62e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================