SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=7902 comm=syz-executor.0
==================================================================
netlink: 124 bytes leftover after parsing attributes in process `syz-executor.0'.
BUG: KASAN: use-after-free in __ext4_check_dir_entry+0x2f9/0x340 fs/ext4/dir.c:68
Read of size 2 at addr ffff88808cf3f003 by task syz-executor.1/7912

CPU: 0 PID: 7912 Comm: syz-executor.1 Not tainted 4.14.184-syzkaller #0
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=7914 comm=syz-executor.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+0x1b2/0x283 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1dc mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0xa9/0x2b9 mm/kasan/report.c:393
 __ext4_check_dir_entry+0x2f9/0x340 fs/ext4/dir.c:68
 ext4_readdir+0x819/0x27e0 fs/ext4/dir.c:240
 iterate_dir+0x1a0/0x5e0 fs/readdir.c:52
 SYSC_getdents64 fs/readdir.c:355 [inline]
 SyS_getdents64+0x130/0x240 fs/readdir.c:336
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45ca69
RSP: 002b:00007fbffbbe4c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00000000004dcec0 RCX: 000000000045ca69
RDX: 00000000c0002521 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000000f7 R14: 00000000004c3a1c R15: 00007fbffbbe56d4

The buggy address belongs to the page:
page:ffffea000233cfc0 count:0 mapcount:-127 mapping:          (null) index:0x0
flags: 0xfffe0000000000()
raw: 00fffe0000000000 0000000000000000 0000000000000000 00000000ffffff80
raw: ffffea00022f83a0 ffffea00024ba320 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808cf3ef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88808cf3ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88808cf3f000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88808cf3f080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88808cf3f100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=7903 comm=syz-executor.5
netlink: 148 bytes leftover after parsing attributes in process `syz-executor.5'.
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=7926 comm=syz-executor.5
netlink: 124 bytes leftover after parsing attributes in process `syz-executor.0'.
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=7936 comm=syz-executor.0