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TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
BUG: KASAN: slab-out-of-bounds in put_unaligned_le64 include/linux/unaligned/access_ok.h:50 [inline]
BUG: KASAN: slab-out-of-bounds in crypto_sha3_final+0x416/0x450 crypto/sha3_generic.c:235
Write of size 8 at addr ffff8801c5a9c0c0 by task syz-executor5/15093

CPU: 0 PID: 15093 Comm: syz-executor5 Not tainted 4.17.0+ #106
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+0x1c9/0x2b4 lib/dump_stack.c:113
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
 __asan_report_store8_noabort+0x17/0x20 mm/kasan/report.c:438
 put_unaligned_le64 include/linux/unaligned/access_ok.h:50 [inline]
 crypto_sha3_final+0x416/0x450 crypto/sha3_generic.c:235
 crypto_shash_final+0x104/0x260 crypto/shash.c:152
 kdf_ctr security/keys/dh.c:186 [inline]
 keyctl_dh_compute_kdf security/keys/dh.c:217 [inline]
 __keyctl_dh_compute+0x1198/0x1be0 security/keys/dh.c:389
 keyctl_dh_compute+0xc5/0x11f security/keys/dh.c:425
 __do_sys_keyctl security/keys/keyctl.c:1741 [inline]
 __se_sys_keyctl security/keys/keyctl.c:1637 [inline]
 __x64_sys_keyctl+0x12a/0x3b0 security/keys/keyctl.c:1637
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455b29
Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007ff63a25ec68 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa
RAX: ffffffffffffffda RBX: 00007ff63a25f6d4 RCX: 0000000000455b29
RDX: 0000000020000500 RSI: 00000000200004c0 RDI: 0000000000000017
RBP: 000000000072bea0 R08: 0000000020000580 R09: 0000000000000000
R10: 0000000000000032 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004bfd31 R14: 00000000004ceb30 R15: 0000000000000000

Allocated by task 15093:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553
 __do_kmalloc mm/slab.c:3718 [inline]
 __kmalloc+0x14e/0x760 mm/slab.c:3727
 kmalloc include/linux/slab.h:518 [inline]
 keyctl_dh_compute_kdf security/keys/dh.c:211 [inline]
 __keyctl_dh_compute+0x1000/0x1be0 security/keys/dh.c:389
 keyctl_dh_compute+0xc5/0x11f security/keys/dh.c:425
 __do_sys_keyctl security/keys/keyctl.c:1741 [inline]
 __se_sys_keyctl security/keys/keyctl.c:1637 [inline]
 __x64_sys_keyctl+0x12a/0x3b0 security/keys/keyctl.c:1637
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 14368:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3498 [inline]
 kfree+0xd9/0x260 mm/slab.c:3813
 ext4_ext_remove_space+0x14fc/0x4bb0 fs/ext4/extents.c:3051
 ext4_ext_truncate+0x1d1/0x220 fs/ext4/extents.c:4638
 ext4_truncate+0xef0/0x1670 fs/ext4/inode.c:4463
 ext4_setattr+0x17e8/0x2af0 fs/ext4/inode.c:5563
 notify_change+0xc0c/0x10f0 fs/attr.c:333
 do_truncate+0x1ac/0x2b0 fs/open.c:63
 handle_truncate fs/namei.c:2989 [inline]
 do_last fs/namei.c:3408 [inline]
 path_openat+0x31da/0x4e10 fs/namei.c:3540
 do_filp_open+0x255/0x380 fs/namei.c:3574
 do_sys_open+0x584/0x760 fs/open.c:1101
 __do_sys_openat fs/open.c:1128 [inline]
 __se_sys_openat fs/open.c:1122 [inline]
 __x64_sys_openat+0x9d/0x100 fs/open.c:1122
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8801c5a9c080
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 0 bytes to the right of
 64-byte region [ffff8801c5a9c080, ffff8801c5a9c0c0)
The buggy address belongs to the page:
page:ffffea000716a700 count:1 mapcount:0 mapping:ffff8801da800340 index:0x0
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea0006f3ee08 ffffea00073b8288 ffff8801da800340
raw: 0000000000000000 ffff8801c5a9c000 0000000100000020 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801c5a9bf80: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
 ffff8801c5a9c000: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff8801c5a9c080: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                           ^
 ffff8801c5a9c100: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8801c5a9c180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
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