binder: 9106:9173 BC_FREE_BUFFER ua79a10fa2c31cc0d no match
==================================================================
BUG: KASAN: slab-out-of-bounds in put_unaligned_be32 include/linux/unaligned/access_ok.h:60 [inline]
BUG: KASAN: slab-out-of-bounds in sha1_base_finish include/crypto/sha1_base.h:102 [inline]
BUG: KASAN: slab-out-of-bounds in sha1_finup+0x44e/0x4b0 arch/x86/crypto/sha1_ssse3_glue.c:70
Write of size 4 at addr ffff8801c66c97f4 by task syz-executor3/9181

CPU: 1 PID: 9181 Comm: syz-executor3 Not tainted 4.18.0-rc1+ #111
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
 put_unaligned_be32 include/linux/unaligned/access_ok.h:60 [inline]
 sha1_base_finish include/crypto/sha1_base.h:102 [inline]
 sha1_finup+0x44e/0x4b0 arch/x86/crypto/sha1_ssse3_glue.c:70
 sha1_avx2_finup arch/x86/crypto/sha1_ssse3_glue.c:232 [inline]
 sha1_avx2_final+0x28/0x30 arch/x86/crypto/sha1_ssse3_glue.c:238
 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:00007f3b48c38c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa
RAX: ffffffffffffffda RBX: 00007f3b48c396d4 RCX: 0000000000455b29
RDX: 0000000020000280 RSI: 0000000020000240 RDI: 0000000000000017
RBP: 000000000072bea0 R08: 0000000020000480 R09: 0000000000000000
R10: 00000000000000e2 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004bfe04 R14: 00000000004cf058 R15: 0000000000000000

Allocated by task 9181:
 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 7964:
 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
 ma_put+0x87/0xb0 net/ipv6/mcast.c:829
 __ipv6_dev_mc_dec+0x288/0x380 net/ipv6/mcast.c:938
 ipv6_mc_destroy_dev+0x38/0x1a0 net/ipv6/mcast.c:2584
 addrconf_ifdown+0xfd6/0x1670 net/ipv6/addrconf.c:3783
 addrconf_notify+0x6e9/0x27f0 net/ipv6/addrconf.c:3574
 notifier_call_chain+0x180/0x390 kernel/notifier.c:93
 __raw_notifier_call_chain kernel/notifier.c:394 [inline]
 raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401
 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1735
 call_netdevice_notifiers net/core/dev.c:1753 [inline]
 rollback_registered_many+0x950/0xef0 net/core/dev.c:7472
 rollback_registered+0x1e9/0x420 net/core/dev.c:7514
 unregister_netdevice_queue+0x32f/0x660 net/core/dev.c:8558
 unregister_netdevice include/linux/netdevice.h:2548 [inline]
 __tun_detach+0x11d1/0x15e0 drivers/net/tun.c:727
 tun_detach drivers/net/tun.c:744 [inline]
 tun_chr_close+0xe3/0x180 drivers/net/tun.c:3271
 __fput+0x35b/0x8b0 fs/file_table.c:209
 ____fput+0x15/0x20 fs/file_table.c:243
 task_work_run+0x1ec/0x2a0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x1b08/0x2750 kernel/exit.c:865
 do_group_exit+0x177/0x440 kernel/exit.c:968
 get_signal+0x88e/0x1970 kernel/signal.c:2468
 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816
 exit_to_usermode_loop+0x2de/0x370 arch/x86/entry/common.c:162
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8801c66c9700
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 244 bytes inside of
 256-byte region [ffff8801c66c9700, ffff8801c66c9800)
The buggy address belongs to the page:
page:ffffea000719b240 count:1 mapcount:0 mapping:ffff8801da8007c0 index:0xffff8801c66c9ac0
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea0006c0ad88 ffffea0006c0dac8 ffff8801da8007c0
raw: ffff8801c66c9ac0 ffff8801c66c90c0 000000010000000b 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801c66c9680: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8801c66c9700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801c66c9780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 fc
                                                             ^
 ffff8801c66c9800: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff8801c66c9880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================