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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 ffff8801d6dd3958 by task syz-executor4/9834

CPU: 1 PID: 9834 Comm: syz-executor4 Not tainted 4.18.0-rc2+ #118
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:00007fe45d4a0c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa
RAX: ffffffffffffffda RBX: 00007fe45d4a16d4 RCX: 0000000000455a99
RDX: 0000000020a53ffb RSI: 0000000020000100 RDI: 0000000000000017
RBP: 000000000072bea0 R08: 0000000020000140 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004bfd68 R14: 00000000004cefb8 R15: 0000000000000000

Allocated by task 9834:
 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 90:
 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
 kfree_const+0x59/0x70 mm/util.c:38
 kernfs_put+0x258/0x760 fs/kernfs/dir.c:532
 sysfs_put include/linux/sysfs.h:533 [inline]
 kobject_del.part.4+0x42/0xf0 lib/kobject.c:574
 kobject_del lib/kobject.c:569 [inline]
 kobject_cleanup lib/kobject.c:637 [inline]
 kobject_release lib/kobject.c:672 [inline]
 kref_put include/linux/kref.h:70 [inline]
 kobject_put+0x155/0x280 lib/kobject.c:689
 net_rx_queue_update_kobjects+0x436/0x630 net/core/net-sysfs.c:968
 remove_queue_kobjects net/core/net-sysfs.c:1424 [inline]
 netdev_unregister_kobject+0x1f2/0x2e0 net/core/net-sysfs.c:1566
 rollback_registered_many+0x890/0xef0 net/core/dev.c:7496
 unregister_netdevice_many+0xfb/0x4d0 net/core/dev.c:8577
 default_device_exit_batch+0x459/0x560 net/core/dev.c:9043
 ops_exit_list.isra.7+0x105/0x160 net/core/net_namespace.c:155
 cleanup_net+0x537/0xb50 net/core/net_namespace.c:523
 process_one_work+0xc73/0x1ba0 kernel/workqueue.c:2153
 worker_thread+0x189/0x13c0 kernel/workqueue.c:2296
 kthread+0x345/0x410 kernel/kthread.c:240
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412

The buggy address belongs to the object at ffff8801d6dd3940
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 24 bytes inside of
 32-byte region [ffff8801d6dd3940, ffff8801d6dd3960)
The buggy address belongs to the page:
page:ffffea00075b74c0 count:1 mapcount:0 mapping:ffff8801da8001c0 index:0xffff8801d6dd3fc1
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea00075b3dc8 ffffea00075b5d08 ffff8801da8001c0
raw: ffff8801d6dd3fc1 ffff8801d6dd3000 000000010000003d 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801d6dd3800: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8801d6dd3880: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff8801d6dd3900: fb fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
                                                    ^
 ffff8801d6dd3980: fb fb fb fb fc fc fc fc 00 fc fc fc fc fc fc fc
 ffff8801d6dd3a00: 00 00 00 00 fc fc fc fc 00 fc fc fc fc fc fc fc
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