wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready ================================================================== BUG: KASAN: use-after-free in ntfs_ucsncmp fs/ntfs/unistr.c:156 [inline] BUG: KASAN: use-after-free in ntfs_are_names_equal+0x178/0x1a0 fs/ntfs/unistr.c:75 Read of size 2 at addr ffff888088442ee8 by task syz-executor.3/7951 CPU: 1 PID: 7951 Comm: syz-executor.3 Not tainted 4.14.202-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x14b/0x1f1 lib/dump_stack.c:58 print_address_description.cold.6+0x9/0x1ca mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report.cold.7+0x11a/0x2d4 mm/kasan/report.c:409 IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready __asan_report_load2_noabort+0x14/0x20 mm/kasan/report.c:428 IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready ntfs_ucsncmp fs/ntfs/unistr.c:156 [inline] ntfs_are_names_equal+0x178/0x1a0 fs/ntfs/unistr.c:75 ntfs_attr_find+0x36c/0xb60 fs/ntfs/attrib.c:628 ntfs_external_attr_find fs/ntfs/attrib.c:1107 [inline] ntfs_attr_lookup+0x1085/0x2480 fs/ntfs/attrib.c:1205 ntfs_read_locked_attr_inode fs/ntfs/inode.c:1266 [inline] ntfs_attr_iget+0x742/0x23c0 fs/ntfs/inode.c:251 ntfs_read_locked_inode+0x25c1/0x51d0 fs/ntfs/inode.c:986 ntfs_iget+0xda/0x110 fs/ntfs/inode.c:190 load_system_files fs/ntfs/super.c:1988 [inline] ntfs_fill_super+0x4c20/0x76e0 fs/ntfs/super.c:2908 mount_bdev+0x26f/0x330 fs/super.c:1134 ntfs_mount+0x10/0x20 fs/ntfs/super.c:3065 mount_fs+0x7f/0x269 fs/super.c:1237 vfs_kern_mount.part.9+0x58/0x3c0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x352/0x2af0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xb1/0xd0 fs/namespace.c:3072 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x4607ea RSP: 002b:00007f2b1c363a88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f2b1c363b20 RCX: 00000000004607ea RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f2b1c363ae0 ieee80211 phy7: mac80211_hwsim_conf_tx (queue=2 txop=0 cw_min=15 cw_max=1023 aifs=3) RBP: 00007f2b1c363ae0 R08: 00007f2b1c363b20 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 ieee80211 phy7: mac80211_hwsim_conf_tx (queue=3 txop=0 cw_min=15 cw_max=1023 aifs=7) R13: 0000000020000100 R14: 0000000020000200 R15: 000000002007dc00 The buggy address belongs to the page: page:ffffea0002211080 count:0 mapcount:-127 mapping: (null) index:0x1 flags: 0xfffe0000000000() raw: 00fffe0000000000 0000000000000000 0000000000000001 00000000ffffff80 raw: ffff88813fffb838 ffffea0002213ea0 0000000000000001 0000000000000000 ieee80211 phy7: mac80211_hwsim_bss_info_changed(changed=0x2000 vif->addr=02:00:00:00:07:00) page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888088442d80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888088442e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888088442e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888088442f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888088442f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================