audit: type=1400 audit(1512741330.535:7): avc:  denied  { map } for  pid=3150 comm="syzkaller576099" path="/root/syzkaller576099542" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
==================================================================
BUG: KASAN: wild-memory-access in memcpy include/linux/string.h:341 [inline]
BUG: KASAN: wild-memory-access in memcpy_dir crypto/scatterwalk.c:28 [inline]
BUG: KASAN: wild-memory-access in scatterwalk_copychunks+0x206/0x480 crypto/scatterwalk.c:43
Write of size 16 at addr 00050800c4072f18 by task syzkaller576099/3150

CPU: 0 PID: 3150 Comm: syzkaller576099 Not tainted 4.15.0-rc2+ #212
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
 kasan_report_error mm/kasan/report.c:349 [inline]
 kasan_report+0x13b/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]
 memcpy_dir crypto/scatterwalk.c:28 [inline]
 scatterwalk_copychunks+0x206/0x480 crypto/scatterwalk.c:43
 blkcipher_done_slow crypto/blkcipher.c:81 [inline]
 blkcipher_walk_done+0xa4b/0xde0 crypto/blkcipher.c:118
 glue_ctr_crypt_128bit+0x597/0xc20 arch/x86/crypto/glue_helper.c:289
 ctr_crypt+0x34/0x40 arch/x86/crypto/serpent_avx2_glue.c:168
 __ablk_encrypt+0x1d1/0x2d0 crypto/ablk_helper.c:64
 ablk_encrypt+0x23e/0x2c0 crypto/ablk_helper.c:84
 skcipher_crypt_ablkcipher crypto/skcipher.c:714 [inline]
 skcipher_decrypt_ablkcipher+0x312/0x420 crypto/skcipher.c:732
 crypto_skcipher_decrypt include/crypto/skcipher.h:463 [inline]
 chacha_decrypt crypto/chacha20poly1305.c:152 [inline]
 poly_tail_continue+0x42a/0x6b0 crypto/chacha20poly1305.c:167
 poly_tail+0x40f/0x520 crypto/chacha20poly1305.c:201
 poly_cipherpad+0x33e/0x470 crypto/chacha20poly1305.c:231
 poly_cipher+0x303/0x440 crypto/chacha20poly1305.c:262
 poly_adpad+0x347/0x480 crypto/chacha20poly1305.c:292
 poly_ad+0x25c/0x300 crypto/chacha20poly1305.c:316
 poly_setkey+0x2fc/0x3e0 crypto/chacha20poly1305.c:343
 poly_init+0x16c/0x1d0 crypto/chacha20poly1305.c:366
 poly_genkey+0x422/0x590 crypto/chacha20poly1305.c:406
 chachapoly_decrypt+0x73/0x90 crypto/chacha20poly1305.c:488
 crypto_aead_decrypt include/crypto/aead.h:362 [inline]
 _aead_recvmsg crypto/algif_aead.c:308 [inline]
 aead_recvmsg+0x14a7/0x1bc0 crypto/algif_aead.c:329
 sock_recvmsg_nosec net/socket.c:805 [inline]
 sock_recvmsg+0xc9/0x110 net/socket.c:812
 ___sys_recvmsg+0x29b/0x630 net/socket.c:2207
 __sys_recvmsg+0xe2/0x210 net/socket.c:2252
 SYSC_recvmsg net/socket.c:2264 [inline]
 SyS_recvmsg+0x2d/0x50 net/socket.c:2259
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x43ff39
RSP: 002b:00007ffc8b821e58 EFLAGS: 00000217 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043ff39
RDX: 0000000000000000 RSI: 0000000020c0c000 RDI: 0000000000000004
RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018a0
R13: 0000000000401930 R14: 0000000000000000 R15: 0000000000000000
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