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BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:345 [inline]
BUG: KASAN: slab-out-of-bounds in tgr160_final+0x93/0xe0 crypto/tgr192.c:614
Write of size 20 at addr ffff88017997c794 by task syz-executor5/27318

CPU: 0 PID: 27318 Comm: syz-executor5 Not tainted 4.18.0-rc1+ #107
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
 check_memory_region_inline mm/kasan/kasan.c:260 [inline]
 check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267
 memcpy+0x37/0x50 mm/kasan/kasan.c:303
 memcpy include/linux/string.h:345 [inline]
 tgr160_final+0x93/0xe0 crypto/tgr192.c:614
 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:00007f818ee88c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa
RAX: ffffffffffffffda RBX: 00007f818ee896d4 RCX: 0000000000455b29
RDX: 0000000020a53ffb RSI: 0000000020000100 RDI: 0000000000000017
RBP: 000000000072bea0 R08: 0000000020000140 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004bfd31 R14: 00000000004ceb30 R15: 0000000000000000

Allocated by task 27318:
 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 15684:
 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
 kvfree+0x61/0x70 mm/util.c:442
 __vunmap+0x326/0x460 mm/vmalloc.c:1529
 vfree+0x68/0x100 mm/vmalloc.c:1593
 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:870 [inline]
 get_entries net/ipv4/netfilter/ip_tables.c:1027 [inline]
 do_ipt_get_ctl+0xa1f/0xc00 net/ipv4/netfilter/ip_tables.c:1703
 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline]
 nf_getsockopt+0x80/0xe0 net/netfilter/nf_sockopt.c:122
 ip_getsockopt+0x1fb/0x2b0 net/ipv4/ip_sockglue.c:1574
 tcp_getsockopt+0x93/0xe0 net/ipv4/tcp.c:3534
 sock_common_getsockopt+0x9a/0xe0 net/core/sock.c:2999
 __sys_getsockopt+0x1ad/0x390 net/socket.c:1984
 __do_sys_getsockopt net/socket.c:1995 [inline]
 __se_sys_getsockopt net/socket.c:1992 [inline]
 __x64_sys_getsockopt+0xbe/0x150 net/socket.c:1992
 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 ffff88017997c780
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 20 bytes inside of
 32-byte region [ffff88017997c780, ffff88017997c7a0)
The buggy address belongs to the page:
page:ffffea0005e65f00 count:1 mapcount:0 mapping:ffff8801da8001c0 index:0xffff88017997cfc1
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea0005548f88 ffffea000739e4c8 ffff8801da8001c0
raw: ffff88017997cfc1 ffff88017997c000 0000000100000027 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88017997c680: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff88017997c700: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff88017997c780: 00 00 00 fc fc fc fc fc fb fb fb fb fc fc fc fc
                            ^
 ffff88017997c800: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff88017997c880: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
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