ntfs: (device loop1): ntfs_ucstonls(): Unicode name contains characters that cannot be converted to character set default. You might want to try to use the mount option nls=utf8. ntfs: (device loop1): 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+0xe21/0x3660 fs/ntfs/dir.c:1200 Read of size 1 at addr ffff888061e9c199 by task syz-executor/4190 CPU: 0 PID: 4190 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 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_filldir fs/ntfs/dir.c:1021 [inline] ntfs_readdir+0xe21/0x3660 fs/ntfs/dir.c:1200 iterate_dir+0x213/0x550 fs/readdir.c:-1 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64+0xf2/0x270 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: 0033:0x7f5e60fa27f3 Code: c7 c0 e8 ff ff ff 64 c7 00 16 00 00 00 31 c0 eb 9e e8 81 9b fd ff 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 e8 ff ff ff f7 d8 RSP: 002b:00007ffdcc542658 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 0000555567b9ba80 RCX: 00007f5e60fa27f3 RDX: 0000000000008000 RSI: 0000555567b9bab0 RDI: 0000000000000006 RBP: 0000555567b9bab0 R08: 00007f5e611cae20 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000293 R12: 0000555567b9ba84 R13: ffffffffffffffe8 R14: 0000000000000016 R15: 00007ffdcc5459f0 Allocated by task 4190: 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+0xaf/0xe0 mm/kasan/common.c:522 kmalloc include/linux/slab.h:612 [inline] ntfs_readdir+0x77a/0x3660 fs/ntfs/dir.c:1162 iterate_dir+0x213/0x550 fs/readdir.c:-1 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64+0xf2/0x270 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 The buggy address belongs to the object at ffff888061e9c000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 409 bytes inside of 512-byte region [ffff888061e9c000, ffff888061e9c200) The buggy address belongs to the page: page:ffffea000187a700 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888061e9d800 pfn:0x61e9c head:ffffea000187a700 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea00017c4200 0000000400000004 ffff888016c41c80 raw: ffff888061e9d800 000000008010000e 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 4190, ts 62969758107, free_ts 23298820308 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x24f6/0x2670 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+0x807/0xdd0 mm/slub.c:3013 __slab_alloc mm/slub.c:3100 [inline] slab_alloc_node mm/slub.c:3191 [inline] __kmalloc_node_track_caller+0x13d/0x3a0 mm/slub.c:4963 kmalloc_reserve net/core/skbuff.c:356 [inline] __alloc_skb+0x22c/0x750 net/core/skbuff.c:427 alloc_skb include/linux/skbuff.h:1162 [inline] alloc_uevent_skb+0x7d/0x230 lib/kobject_uevent.c:290 uevent_net_broadcast_tagged lib/kobject_uevent.c:351 [inline] kobject_uevent_net_broadcast+0x17e/0x530 lib/kobject_uevent.c:412 kobject_uevent_env+0x550/0x890 lib/kobject_uevent.c:608 device_add+0xac2/0x1050 drivers/base/core.c:3393 netdev_register_kobject+0x184/0x320 net/core/net-sysfs.c:2014 register_netdevice+0x10e8/0x1720 net/core/dev.c:10423 __rtnl_newlink net/core/rtnetlink.c:3530 [inline] rtnl_newlink+0x139e/0x1920 net/core/rtnetlink.c:3578 rtnetlink_rcv_msg+0x82c/0xf00 net/core/rtnetlink.c:5688 netlink_rcv_skb+0x1e9/0x430 net/netlink/af_netlink.c:2512 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x78f/0x940 net/netlink/af_netlink.c:1344 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_contig_range+0x96/0xf0 mm/page_alloc.c:9428 destroy_args+0xef/0xa00 mm/debug_vm_pgtable.c:1018 debug_vm_pgtable+0x321/0x380 mm/debug_vm_pgtable.c:1336 do_one_initcall+0x272/0x730 init/main.c:1315 do_initcall_level+0x13d/0x1f0 init/main.c:1388 do_initcalls+0x4b/0x90 init/main.c:1404 kernel_init_freeable+0x3d5/0x560 init/main.c:1628 kernel_init+0x19/0x1b0 init/main.c:1519 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Memory state around the buggy address: ffff888061e9c080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888061e9c100: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc >ffff888061e9c180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888061e9c200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888061e9c280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================