IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1
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BUG: KASAN: use-after-free in ntfs_attr_find+0xacd/0xc20 fs/ntfs/attrib.c:611
Read of size 2 at addr ffff888043cc60ca by task syz-executor.3/9430

batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
CPU: 1 PID: 9430 Comm: syz-executor.3 Not tainted 4.14.296-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load_n_noabort+0x6b/0x80 mm/kasan/report.c:440
 ntfs_attr_find+0xacd/0xc20 fs/ntfs/attrib.c:611
 ntfs_attr_lookup+0xeca/0x1f30 fs/ntfs/attrib.c:1207
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
 ntfs_read_locked_inode+0xa8d/0x51b0 fs/ntfs/inode.c:1031
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1
 ntfs_iget+0xfa/0x130 fs/ntfs/inode.c:190
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
 load_and_init_mft_mirror fs/ntfs/super.c:1041 [inline]
 load_system_files fs/ntfs/super.c:1786 [inline]
 ntfs_fill_super+0xa5a/0x7180 fs/ntfs/super.c:2909
 mount_bdev+0x2b3/0x360 fs/super.c:1134
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2572 [inline]
 do_mount+0xe65/0x2a30 fs/namespace.c:2905
 SYSC_mount fs/namespace.c:3121 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3098
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f3080567ada
RSP: 002b:00007f307ead8f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f3080567ada
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f307ead8fe0
RBP: 00007f307ead9020 R08: 00007f307ead9020 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f307ead8fe0 R15: 000000002007a5e0

The buggy address belongs to the page:
page:ffffea00010f3180 count:0 mapcount:0 mapping:          (null) index:0x1
flags: 0xfff00000000000()
raw: 00fff00000000000 0000000000000000 0000000000000001 00000000ffffffff
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready
raw: dead000000000100 dead000000000200 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
batman_adv: batadv0: Interface activated: batadv_slave_1
 ffff888043cc5f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888043cc6000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888043cc6080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                              ^
IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready
 ffff888043cc6100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888043cc6180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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