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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 ffff8801c865f8d8 by task syz-executor7/9917

CPU: 0 PID: 9917 Comm: syz-executor7 Not tainted 4.17.0+ #105
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: 0033:0x455b29
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:00007f53738ffc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa
RAX: ffffffffffffffda RBX: 00007f53739006d4 RCX: 0000000000455b29
RDX: 0000000020a53ffb RSI: 0000000020000100 RDI: 0000000000000017
RBP: 000000000072bea0 R08: 0000000020000040 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004bfd31 R14: 00000000004ceb30 R15: 0000000000000000

Allocated by task 9917:
 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 4526:
 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
 __memcg_destroy_list_lru_node mm/list_lru.c:302 [inline]
 memcg_destroy_list_lru_node.isra.7+0xaf/0x100 mm/list_lru.c:353
 memcg_destroy_list_lru mm/list_lru.c:441 [inline]
 list_lru_destroy+0x2ac/0x4d0 mm/list_lru.c:601
 deactivate_locked_super+0xa3/0x100 fs/super.c:333
 deactivate_super+0x193/0x1c0 fs/super.c:357
 cleanup_mnt+0xbf/0x160 fs/namespace.c:1174
 mntput_no_expire+0x828/0xbc0 fs/namespace.c:1238
 mntput fs/namespace.c:1248 [inline]
 kern_unmount+0xbd/0xf0 fs/namespace.c:3006
 mq_put_mnt+0x37/0x41 ipc/mqueue.c:1557
 put_ipc_ns+0x5e/0x180 ipc/namespace.c:163
 free_nsproxy+0xcf/0x220 kernel/nsproxy.c:180
 switch_task_namespaces+0xb8/0xd0 kernel/nsproxy.c:229
 exit_task_namespaces+0x17/0x20 kernel/nsproxy.c:234
 do_exit+0x1b03/0x2750 kernel/exit.c:864
 do_group_exit+0x177/0x440 kernel/exit.c:968
 __do_sys_exit_group kernel/exit.c:979 [inline]
 __se_sys_exit_group kernel/exit.c:977 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:977
 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 ffff8801c865f8c0
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 24 bytes inside of
 32-byte region [ffff8801c865f8c0, ffff8801c865f8e0)
The buggy address belongs to the page:
page:ffffea00072197c0 count:1 mapcount:0 mapping:ffff8801da8001c0 index:0xffff8801c865ffc1
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea0006c5f288 ffffea00071ab348 ffff8801da8001c0
raw: ffff8801c865ffc1 ffff8801c865f000 000000010000003f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801c865f780: 00 00 00 fc fc fc fc fc 00 00 00 00 fc fc fc fc
 ffff8801c865f800: fb fb fb fb fc fc fc fc 05 fc fc fc fc fc fc fc
>ffff8801c865f880: fb fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
                                                    ^
 ffff8801c865f900: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8801c865f980: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
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