IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
==================================================================
BUG: KASAN: use-after-free in isofs_read_inode fs/isofs/inode.c:1348 [inline]
BUG: KASAN: use-after-free in __isofs_iget+0x1c58/0x2010 fs/isofs/inode.c:1548
Read of size 1 at addr ffff880089450015 by task syz-executor.2/10050

CPU: 0 PID: 10050 Comm: syz-executor.2 Not tainted 4.18.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x15a/0x20d lib/dump_stack.c:113
 print_address_description.cold.6+0x9/0x244 mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report mm/kasan/report.c:412 [inline]
 kasan_report.cold.7+0x242/0x305 mm/kasan/report.c:396
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:430
 isofs_read_inode fs/isofs/inode.c:1348 [inline]
 __isofs_iget+0x1c58/0x2010 fs/isofs/inode.c:1548
 isofs_iget fs/isofs/isofs.h:134 [inline]
 isofs_export_iget.part.1+0x12/0x80 fs/isofs/export.c:29
 isofs_export_iget fs/isofs/export.c:170 [inline]
 isofs_fh_to_dentry+0xc7/0x104 fs/isofs/export.c:170
 exportfs_decode_fh+0x119/0x665 fs/exportfs/expfs.c:432
 do_handle_to_path fs/fhandle.c:152 [inline]
 handle_to_path fs/fhandle.c:207 [inline]
 do_handle_open+0x26c/0x5d0 fs/fhandle.c:223
 __do_sys_open_by_handle_at fs/fhandle.c:265 [inline]
 __se_sys_open_by_handle_at fs/fhandle.c:256 [inline]
 __x64_sys_open_by_handle_at+0x71/0xb0 fs/fhandle.c:256
 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fc57bbf78d9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 
RSP: 002b:00007fc57b36e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
RAX: ffffffffffffffda RBX: 00007fc57bcfbf60 RCX: 00007fc57bbf78d9
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000005
RBP: 00007fc57bc51cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc4f21129f R14: 00007fc57b36e300 R15: 0000000000022000

The buggy address belongs to the page:
page:ffffea0002251400 count:0 mapcount:0 mapping:0000000000000000 index:0x1
flags: 0xfff00000000000()
raw: 00fff00000000000 ffffea0002253648 ffffea0002253888 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not active (free page?)

Memory state around the buggy address:
 ffff88008944ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88008944ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff880089450000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                         ^
 ffff880089450080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff880089450100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready