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BUG: KASAN: slab-out-of-bounds in rmd160_final+0x211/0x250 crypto/rmd160.c:334
Write of size 4 at addr ffff8801d700e818 by task syz-executor1/7928

CPU: 1 PID: 7928 Comm: syz-executor1 Not tainted 4.18.0-rc2+ #117
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_store4_noabort+0x17/0x20 mm/kasan/report.c:437
 rmd160_final+0x211/0x250 crypto/rmd160.c:334
 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: 0033:0x455a99
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:00007efee5db6c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa
RAX: ffffffffffffffda RBX: 00007efee5db76d4 RCX: 0000000000455a99
RDX: 0000000020000200 RSI: 00000000200001c0 RDI: 0000000000000017
RBP: 000000000072bea0 R08: 0000000020000140 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004bfd68 R14: 00000000004cefb8 R15: 0000000000000000

Allocated by task 7928:
 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 4567:
 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
 xt_free_table_info+0xb7/0x180 net/netfilter/x_tables.c:1202
 __do_replace+0x86f/0xad0 net/ipv6/netfilter/ip6_tables.c:1107
 do_replace net/ipv6/netfilter/ip6_tables.c:1160 [inline]
 do_ip6t_set_ctl+0x49c/0x64b net/ipv6/netfilter/ip6_tables.c:1684
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x7d/0xd0 net/netfilter/nf_sockopt.c:115
 ipv6_setsockopt+0x105/0x170 net/ipv6/ipv6_sockglue.c:927
 tcp_setsockopt+0x93/0xe0 net/ipv4/tcp.c:3049
 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:3040
 __sys_setsockopt+0x1c5/0x3b0 net/socket.c:1947
 __do_sys_setsockopt net/socket.c:1958 [inline]
 __se_sys_setsockopt net/socket.c:1955 [inline]
 __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1955
 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 ffff8801d700e800
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 24 bytes inside of
 32-byte region [ffff8801d700e800, ffff8801d700e820)
The buggy address belongs to the page:
page:ffffea00075c0380 count:1 mapcount:0 mapping:ffff8801da8001c0 index:0xffff8801d700efc1
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea0007613b08 ffffea0006bd9908 ffff8801da8001c0
raw: ffff8801d700efc1 ffff8801d700e000 0000000100000022 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801d700e700: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8801d700e780: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff8801d700e800: 00 00 00 fc fc fc fc fc fb fb fb fb fc fc fc fc
                            ^
 ffff8801d700e880: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8801d700e900: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
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