R10: 0000000020001fde R11: 0000000000000212 R12: 00000000006f3ef8
R13: 00000000ffffffff R14: 00007f4ce2e186d4 R15: 000000000000000c
netlink: 17 bytes leftover after parsing attributes in process `syz-executor1'.
netlink: 17 bytes leftover after parsing attributes in process `syz-executor1'.
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:341 [inline]
BUG: KASAN: slab-out-of-bounds in sha3_update+0xdf/0x2e0 crypto/sha3_generic.c:161
Write of size 137 at addr ffff8801cdc0f178 by task syz-executor0/5954

CPU: 1 PID: 5954 Comm: syz-executor0 Not tainted 4.15.0-rc2+ #141
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 print_address_description+0x73/0x250 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report+0x25b/0x340 mm/kasan/report.c:409
 check_memory_region_inline mm/kasan/kasan.c:260 [inline]
 check_memory_region+0x137/0x190 mm/kasan/kasan.c:267
 memcpy+0x37/0x50 mm/kasan/kasan.c:303
 memcpy include/linux/string.h:341 [inline]
 sha3_update+0xdf/0x2e0 crypto/sha3_generic.c:161
 crypto_shash_update+0xcb/0x220 crypto/shash.c:109
 hmac_update+0x7e/0xa0 crypto/hmac.c:122
 crypto_shash_update+0xcb/0x220 crypto/shash.c:109
 hmac_update+0x7e/0xa0 crypto/hmac.c:122
 crypto_shash_update+0xcb/0x220 crypto/shash.c:109
 shash_ahash_update+0xbe/0x120 crypto/shash.c:228
 shash_async_update+0x19/0x20 crypto/shash.c:236
 crypto_ahash_update include/crypto/hash.h:522 [inline]
 hash_sendmsg+0x49a/0x9c0 crypto/algif_hash.c:112
 sock_sendmsg_nosec net/socket.c:632 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:642
 ___sys_sendmsg+0x75b/0x8a0 net/socket.c:2048
 __sys_sendmsg+0xe5/0x210 net/socket.c:2082
 SYSC_sendmsg net/socket.c:2093 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2089
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x4529d9
RSP: 002b:00007f133b942c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000758190 RCX: 00000000004529d9
RDX: 0000000000040003 RSI: 000000002034cfc8 RDI: 0000000000000017
RBP: 000000000000039b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2728
R13: 00000000ffffffff R14: 00007f133b9436d4 R15: 0000000000000008

Allocated by task 5941:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
 __do_kmalloc mm/slab.c:3711 [inline]
 __kmalloc+0x162/0x760 mm/slab.c:3720
 kmalloc include/linux/slab.h:504 [inline]
 sock_kmalloc+0x112/0x190 net/core/sock.c:1979
 hash_accept_parent_nokey+0x76/0x320 crypto/algif_hash.c:470
 hash_accept_parent+0x9a/0xd0 crypto/algif_hash.c:497
 af_alg_accept+0x125/0x670 crypto/af_alg.c:294
 alg_accept+0x46/0x60 crypto/af_alg.c:330
 SYSC_accept4+0x384/0x850 net/socket.c:1573
 SyS_accept4 net/socket.c:1523 [inline]
 SYSC_accept net/socket.c:1607 [inline]
 SyS_accept+0x26/0x30 net/socket.c:1604
 entry_SYSCALL_64_fastpath+0x1f/0x96

Freed by task 3492:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3491 [inline]
 kfree+0xca/0x250 mm/slab.c:3806
 sk_prot_free net/core/sock.c:1506 [inline]
 __sk_destruct+0x74a/0x910 net/core/sock.c:1585
 sk_destruct+0x47/0x80 net/core/sock.c:1593
 __sk_free+0x57/0x230 net/core/sock.c:1601
 sk_free+0x2a/0x40 net/core/sock.c:1612
 sock_put include/net/sock.h:1655 [inline]
 af_alg_release+0x5d/0x70 crypto/af_alg.c:126
 sock_release+0x8d/0x1e0 net/socket.c:596
 sock_close+0x16/0x20 net/socket.c:1125
 __fput+0x333/0x7f0 fs/file_table.c:210
 ____fput+0x15/0x20 fs/file_table.c:244
 task_work_run+0x199/0x270 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x9bb/0x1ae0 kernel/exit.c:865
 do_group_exit+0x149/0x400 kernel/exit.c:968
 SYSC_exit_group kernel/exit.c:979 [inline]
 SyS_exit_group+0x1d/0x20 kernel/exit.c:977
 entry_SYSCALL_64_fastpath+0x1f/0x96

The buggy address belongs to the object at ffff8801cdc0ec40
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 1336 bytes inside of
 2048-byte region [ffff8801cdc0ec40, ffff8801cdc0f440)
The buggy address belongs to the page:
page:00000000b5ebb744 count:1 mapcount:0 mapping:00000000f6dc9167 index:0x0 compound_mapcount: 0
flags: 0x2fffc0000008100(slab|head)
raw: 02fffc0000008100 ffff8801cdc0e3c0 0000000000000000 0000000100000003
raw: ffffea00070ec320 ffffea000732d020 ffff8801db000c40 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801cdc0f080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801cdc0f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801cdc0f180: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff8801cdc0f200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801cdc0f280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================