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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+0xefa/0x10a0 crypto/sha3_generic.c:235
Write of size 8 at addr ffff8801d6b6f124 by task syz-executor0/18734

CPU: 0 PID: 18734 Comm: syz-executor0 Not tainted 4.18.0-rc2+ #20
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+0xefa/0x10a0 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
 compat_keyctl_dh_compute+0x2d0/0x400 security/keys/compat_dh.c:39
 __do_compat_sys_keyctl security/keys/compat.c:136 [inline]
 __se_compat_sys_keyctl security/keys/compat.c:59 [inline]
 __ia32_compat_sys_keyctl+0x137/0x3b0 security/keys/compat.c:59
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f50cb9
Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 
RSP: 002b:00000000f5f4c0ac EFLAGS: 00000282 ORIG_RAX: 0000000000000120
RAX: ffffffffffffffda RBX: 0000000000000017 RCX: 00000000200006c0
RDX: 0000000020000540 RSI: 0000000000000005 RDI: 0000000020009080
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 1007031017:
 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
 compat_keyctl_dh_compute+0x2d0/0x400 security/keys/compat_dh.c:39
 __do_compat_sys_keyctl security/keys/compat.c:136 [inline]
 __se_compat_sys_keyctl security/keys/compat.c:59 [inline]
 __ia32_compat_sys_keyctl+0x137/0x3b0 security/keys/compat.c:59
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

Freed by task 17354:
 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
 free_modprobe_argv+0x54/0xa0 kernel/kmod.c:66
 call_usermodehelper_freeinfo kernel/umh.c:44 [inline]
 call_usermodehelper_exec+0x27a/0x500 kernel/umh.c:576
 call_modprobe kernel/kmod.c:99 [inline]
 __request_module+0x4ba/0xcdd kernel/kmod.c:171
 inet_create+0xe5c/0x1070 net/ipv4/af_inet.c:293
 __sock_create+0x53c/0x940 net/socket.c:1322
 sock_create net/socket.c:1362 [inline]
 __sys_socket+0x106/0x260 net/socket.c:1392
 __do_sys_socket net/socket.c:1401 [inline]
 __se_sys_socket net/socket.c:1399 [inline]
 __ia32_sys_socket+0x73/0xb0 net/socket.c:1399
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

The buggy address belongs to the object at ffff8801d6b6f100
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 4 bytes to the right of
 32-byte region [ffff8801d6b6f100, ffff8801d6b6f120)
The buggy address belongs to the page:
page:ffffea00075adbc0 count:1 mapcount:0 mapping:ffff8801da8001c0 index:0xffff8801d6b6ffc1
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea00060ef508 ffffea00072e8788 ffff8801da8001c0
raw: ffff8801d6b6ffc1 ffff8801d6b6f000 0000000100000033 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801d6b6f000: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8801d6b6f080: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff8801d6b6f100: 00 00 00 00 fc fc fc fc fb fb fb fb fc fc fc fc
                               ^
 ffff8801d6b6f180: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8801d6b6f200: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
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