audit: type=1400 audit(1513440810.683:7): avc: denied { map } for pid=3150 comm="syzkaller682513" path="/root/syzkaller682513094" 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 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 3150 Comm: syzkaller682513 Not tainted 4.15.0-rc2-mm1+ #39 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:86 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:111 [inline] RIP: 0010:scatterwalk_done include/crypto/scatterwalk.h:119 [inline] RIP: 0010:blkcipher_walk_done+0x300/0xde0 crypto/blkcipher.c:123 RSP: 0018:ffff8801c4ecf330 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 0000000060453082 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 0000000000000f60 RDI: 0000000000000008 RBP: ffff8801c4ecf380 R08: 00000000fffff8f8 R09: 0000000000000000 R10: 0000000000000004 R11: ffff8801bc0a8f50 R12: ffff8801c4ecf630 R13: ffff8801c4ecf4e0 R14: ffff8801c4ecf528 R15: ffff8801c4ecf508 FS: 00000000009dc880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002022efc8 CR3: 00000001ca816006 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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:61 ablk_encrypt+0x23e/0x2c0 crypto/ablk_helper.c:81 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 chacha_encrypt crypto/chacha20poly1305.c:446 [inline] chachapoly_encrypt+0x418/0x620 crypto/chacha20poly1305.c:467 crypto_aead_encrypt include/crypto/aead.h:330 [inline] _aead_recvmsg crypto/algif_aead.c:308 [inline] aead_recvmsg+0x1295/0x1bc0 crypto/algif_aead.c:329 sock_recvmsg_nosec net/socket.c:809 [inline] sock_recvmsg+0xc9/0x110 net/socket.c:816 ___sys_recvmsg+0x29b/0x630 net/socket.c:2185 __sys_recvmsg+0xe2/0x210 net/socket.c:2230 SYSC_recvmsg net/socket.c:2242 [inline] SyS_recvmsg+0x2d/0x50 net/socket.c:2237 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x43ff89 RSP: 002b:00007ffcc1fbb2f8 EFLAGS: 00000217 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043ff89 RDX: 0000000000000002 RSI: 000000002022efc8 RDI: 0000000000000004 RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018f0 R13: 0000000000401980 R14: 0000000000000000 R15: 0000000000000000 Code: 00 fc ff df 48 c1 e9 03 80 3c 11 00 0f 85 7a 09 00 00 48 8d 78 08 48 ba 00 00 00 00 00 fc ff df 49 89 45 20 48 89 f9 48 c1 e9 03 <0f> b6 14 11 84 d2 74 09 80 fa 03 0f 8e 3e 09 00 00 4c 89 f9 8b RIP: scatterwalk_start include/crypto/scatterwalk.h:86 [inline] RSP: ffff8801c4ecf330 RIP: scatterwalk_pagedone include/crypto/scatterwalk.h:111 [inline] RSP: ffff8801c4ecf330 RIP: scatterwalk_done include/crypto/scatterwalk.h:119 [inline] RSP: ffff8801c4ecf330 RIP: blkcipher_walk_done+0x300/0xde0 crypto/blkcipher.c:123 RSP: ffff8801c4ecf330 ---[ end trace a1c6f34c0ca3f7e3 ]---