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BUG: KASAN: use-after-free in __le32_to_cpup include/uapi/linux/byteorder/little_endian.h:58 [inline]
BUG: KASAN: use-after-free in le32_to_cpuvp crypto/chacha20_generic.c:19 [inline]
BUG: KASAN: use-after-free in crypto_chacha20_init crypto/chacha20_generic.c:58 [inline]
BUG: KASAN: use-after-free in crypto_chacha20_crypt+0xaf1/0xbd0 crypto/chacha20_generic.c:91
Read of size 4 at addr ffff8801d897c940 by task kworker/1:2/1309

CPU: 1 PID: 1309 Comm: kworker/1:2 Not tainted 4.15.0-rc3+ #156
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: crypto cryptd_queue_worker
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
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:429
 __le32_to_cpup include/uapi/linux/byteorder/little_endian.h:58 [inline]
 le32_to_cpuvp crypto/chacha20_generic.c:19 [inline]
 crypto_chacha20_init crypto/chacha20_generic.c:58 [inline]
 crypto_chacha20_crypt+0xaf1/0xbd0 crypto/chacha20_generic.c:91
 chacha20_simd+0xe4/0x410 arch/x86/crypto/chacha20_glue.c:78
 crypto_skcipher_decrypt include/crypto/skcipher.h:463 [inline]
 cryptd_skcipher_decrypt+0x2de/0x5a0 crypto/cryptd.c:523
 cryptd_queue_worker+0xff/0x1b0 crypto/cryptd.c:190
 process_one_work+0xbf3/0x1bc0 kernel/workqueue.c:2112
 worker_thread+0x223/0x1990 kernel/workqueue.c:2246
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:441

Allocated by task 6054:
 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
 kmem_cache_alloc_trace+0x136/0x750 mm/slab.c:3610
 kmalloc include/linux/slab.h:499 [inline]
 kzalloc include/linux/slab.h:688 [inline]
 xfrm_state_alloc+0xb8/0x630 net/xfrm/xfrm_state.c:565
 pfkey_msg2xfrm_state net/key/af_key.c:1109 [inline]
 pfkey_add+0x71b/0x3270 net/key/af_key.c:1491
 pfkey_process+0x60b/0x720 net/key/af_key.c:2809
 pfkey_sendmsg+0x4d6/0x9f0 net/key/af_key.c:3648
 sock_sendmsg_nosec net/socket.c:636 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:646
 ___sys_sendmsg+0x755/0x890 net/socket.c:2026
 __sys_sendmsg+0xe5/0x210 net/socket.c:2060
 SYSC_sendmsg net/socket.c:2071 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2067
 entry_SYSCALL_64_fastpath+0x1f/0x96

Freed by task 1309:
 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:3488 [inline]
 kfree+0xca/0x250 mm/slab.c:3803
 xfrm_state_gc_destroy net/xfrm/xfrm_state.c:453 [inline]
 xfrm_state_gc_task+0x53e/0x6c0 net/xfrm/xfrm_state.c:469
 process_one_work+0xbf3/0x1bc0 kernel/workqueue.c:2112
 worker_thread+0x223/0x1990 kernel/workqueue.c:2246
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:441

The buggy address belongs to the object at ffff8801d897c940
 which belongs to the cache kmalloc-1024 of size 1024
The buggy address is located 0 bytes inside of
 1024-byte region [ffff8801d897c940, ffff8801d897cd40)
The buggy address belongs to the page:
page:00000000321de7f9 count:1 mapcount:0 mapping:000000003c55c6f5 index:0x0 compound_mapcount: 0
flags: 0x2fffc0000008100(slab|head)
raw: 02fffc0000008100 ffff8801d897c040 0000000000000000 0000000100000007
raw: ffffea0007625fa0 ffffea00076c63a0 ffff8801db000ac0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801d897c800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801d897c880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8801d897c900: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
                                           ^
 ffff8801d897c980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801d897ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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