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BUG: KMSAN: uninit-value in gf128mul_4k_lle+0x2b6/0x320 crypto/gf128mul.c:391
CPU: 1 PID: 19666 Comm: syz-executor0 Not tainted 4.17.0+ #9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:1125
 __msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:620
 gf128mul_4k_lle+0x2b6/0x320 crypto/gf128mul.c:391
 ghash_update+0xa16/0x1150 crypto/ghash-generic.c:75
 crypto_shash_update crypto/shash.c:117 [inline]
 shash_ahash_update crypto/shash.c:239 [inline]
 shash_async_update+0x298/0x360 crypto/shash.c:247
 crypto_ahash_update include/crypto/hash.h:525 [inline]
 gcm_hash_update crypto/gcm.c:235 [inline]
 gcm_hash_assoc_remain_continue crypto/gcm.c:344 [inline]
 gcm_hash_init_continue crypto/gcm.c:402 [inline]
 gcm_hash+0x8c5/0x24d0 crypto/gcm.c:430
 gcm_encrypt_continue crypto/gcm.c:455 [inline]
 crypto_gcm_encrypt+0xa18/0xb00 crypto/gcm.c:484
 big_key_crypt+0x742/0x780 include/crypto/aead.h:370
 big_key_preparse+0x3f4/0xed0 security/keys/big_key.c:244
 key_create_or_update+0x7a6/0x1a80 security/keys/key.c:849
 __do_sys_add_key security/keys/keyctl.c:122 [inline]
 __se_sys_add_key+0x741/0x980 security/keys/keyctl.c:62
 __x64_sys_add_key+0x15d/0x1b0 security/keys/keyctl.c:62
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x455a99
RSP: 002b:00007f404e9d6c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000f8
RAX: ffffffffffffffda RBX: 00007f404e9d76d4 RCX: 0000000000455a99
RDX: 00000000200022c0 RSI: 0000000020001200 RDI: 00000000200032c0
RBP: 000000000072bea0 R08: fffffffffffffffe R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004bb509 R14: 00000000004c80a0 R15: 0000000000000000

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:282 [inline]
 kmsan_save_stack mm/kmsan/kmsan.c:297 [inline]
 kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:689
 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:464
 __crypto_xor+0x23c/0x16b0 crypto/algapi.c:1014
 crypto_xor include/crypto/algapi.h:217 [inline]
 ghash_update+0x9d4/0x1150 crypto/ghash-generic.c:74
 crypto_shash_update crypto/shash.c:117 [inline]
 shash_ahash_update crypto/shash.c:239 [inline]
 shash_async_update+0x298/0x360 crypto/shash.c:247
 crypto_ahash_update include/crypto/hash.h:525 [inline]
 gcm_hash_update crypto/gcm.c:235 [inline]
 gcm_hash_assoc_remain_continue crypto/gcm.c:344 [inline]
 gcm_hash_init_continue crypto/gcm.c:402 [inline]
 gcm_hash+0x8c5/0x24d0 crypto/gcm.c:430
 gcm_encrypt_continue crypto/gcm.c:455 [inline]
 crypto_gcm_encrypt+0xa18/0xb00 crypto/gcm.c:484
 big_key_crypt+0x742/0x780 include/crypto/aead.h:370
 big_key_preparse+0x3f4/0xed0 security/keys/big_key.c:244
 key_create_or_update+0x7a6/0x1a80 security/keys/key.c:849
 __do_sys_add_key security/keys/keyctl.c:122 [inline]
 __se_sys_add_key+0x741/0x980 security/keys/keyctl.c:62
 __x64_sys_add_key+0x15d/0x1b0 security/keys/keyctl.c:62
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:282 [inline]
 kmsan_save_stack mm/kmsan/kmsan.c:297 [inline]
 kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:689
 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:464
 __crypto_xor+0x23c/0x16b0 crypto/algapi.c:1014
 crypto_xor include/crypto/algapi.h:217 [inline]
 crypto_ctr_crypt_inplace crypto/ctr.c:115 [inline]
 crypto_ctr_crypt+0x7d5/0xd30 crypto/ctr.c:142
 skcipher_crypt_blkcipher crypto/skcipher.c:623 [inline]
 skcipher_encrypt_blkcipher+0x22a/0x320 crypto/skcipher.c:632
 crypto_skcipher_encrypt include/crypto/skcipher.h:443 [inline]
 crypto_gcm_encrypt+0x543/0xb00 crypto/gcm.c:483
 big_key_crypt+0x742/0x780 include/crypto/aead.h:370
 big_key_preparse+0x3f4/0xed0 security/keys/big_key.c:244
 key_create_or_update+0x7a6/0x1a80 security/keys/key.c:849
 __do_sys_add_key security/keys/keyctl.c:122 [inline]
 __se_sys_add_key+0x741/0x980 security/keys/keyctl.c:62
 __x64_sys_add_key+0x15d/0x1b0 security/keys/keyctl.c:62
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:282 [inline]
 kmsan_alloc_meta_for_pages+0x161/0x3a0 mm/kmsan/kmsan.c:819
 kmsan_alloc_page+0x82/0xe0 mm/kmsan/kmsan.c:889
 __alloc_pages_nodemask+0xf7b/0x5cc0 mm/page_alloc.c:4402
 alloc_pages_current+0x6b1/0x970 mm/mempolicy.c:2093
 alloc_pages include/linux/gfp.h:494 [inline]
 big_key_alloc_buffer+0x23e/0xa30 security/keys/big_key.c:179
 big_key_preparse+0x20a/0xed0 security/keys/big_key.c:228
 key_create_or_update+0x7a6/0x1a80 security/keys/key.c:849
 __do_sys_add_key security/keys/keyctl.c:122 [inline]
 __se_sys_add_key+0x741/0x980 security/keys/keyctl.c:62
 __x64_sys_add_key+0x15d/0x1b0 security/keys/keyctl.c:62
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
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