audit: type=1400 audit(1513088869.011:7): avc: denied { map } for pid=3155 comm="syzkaller691756" path="/root/syzkaller691756485" 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: 3155 Comm: syzkaller691756 Not tainted 4.15.0-rc2+ #150 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:124 RSP: 0018:ffff8801c53ff4a0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 0000000064417904 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 0000000000000fd6 RDI: 0000000000000008 RBP: ffff8801c53ff4f0 R08: ffffed00399af7fb R09: 0000000000000000 R10: 0000000000000003 R11: ffffed00399af7fa R12: ffff8801c53ff6a8 R13: ffff8801c53ff590 R14: ffff8801c53ff5d8 R15: ffff8801c53ff5b8 FS: 0000000001255880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020931fd0 CR3: 00000001c5153000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: crypto_ctr_crypt+0x3ca/0x840 crypto/ctr.c:146 skcipher_crypt_blkcipher crypto/skcipher.c:622 [inline] skcipher_decrypt_blkcipher+0x213/0x310 crypto/skcipher.c:640 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: 0033:0x43ffa9 RSP: 002b:00007fff368d1388 EFLAGS: 00000207 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043ffa9 RDX: 0000000000000020 RSI: 00000000201f5000 RDI: 0000000000000004 RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401910 R13: 00000000004019a0 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: ffff8801c53ff4a0 RIP: scatterwalk_pagedone include/crypto/scatterwalk.h:111 [inline] RSP: ffff8801c53ff4a0 RIP: scatterwalk_done include/crypto/scatterwalk.h:119 [inline] RSP: ffff8801c53ff4a0 RIP: blkcipher_walk_done+0x300/0xde0 crypto/blkcipher.c:124 RSP: ffff8801c53ff4a0 ---[ end trace b9d7792ae65afa89 ]---