KMSAN: uninit-value in gf128mul_4k

KMSAN: uninit-value in gf128mul_4k_lle (2)
Status: closed as invalid on 2018/07/17 13:23
Reported-by: syzbot+adaa00fe5d0738baf2b4@syzkaller.appspotmail.com
First crash: 775d, last: 694d

similar bugs (2):
Kernel	Title	Repro	Bisected	Count	Last	Reported	Patched	Status
upstream	KMSAN: uninit-value in gf128mul_4k_lle	C		11	775d	790d	0/17	closed as invalid on 2018/04/22 15:44
upstream	KMSAN: uninit-value in gf128mul_4k_lle (3)	C		2958	195d	560d	15/17	fixed on 2019/11/29 15:48

Sample crash report:

==================================================================
BUG: KMSAN: uninit-value in gf128mul_4k_lle+0x2b6/0x320 crypto/gf128mul.c:391
CPU: 0 PID: 4464 Comm: syzkaller799785 Not tainted 4.16.0+ #87
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+0x185/0x1d0 lib/dump_stack.c:53
 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067
 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:683
 gf128mul_4k_lle+0x2b6/0x320 crypto/gf128mul.c:391
 ghash_update+0xa26/0x1160 crypto/ghash-generic.c:75
 crypto_shash_update crypto/shash.c:117 [inline]
 shash_ahash_update crypto/shash.c:239 [inline]
 shash_async_update+0x290/0x360 crypto/shash.c:247
 crypto_ahash_update include/crypto/hash.h:522 [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+0x8b5/0x24a0 crypto/gcm.c:430
 gcm_encrypt_continue crypto/gcm.c:455 [inline]
 crypto_gcm_encrypt+0xa13/0xaf0 crypto/gcm.c:484
 big_key_crypt+0x73d/0x780 include/crypto/aead.h:370
 big_key_preparse+0x3df/0xec0 security/keys/big_key.c:243
 key_create_or_update+0x7a8/0x1a40 security/keys/key.c:849
 SYSC_add_key+0x6c2/0x960 security/keys/keyctl.c:122
 SyS_add_key+0x77/0xa0 security/keys/keyctl.c:62
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x43fcd9
RSP: 002b:00007fff1f67b858 EFLAGS: 00000207 ORIG_RAX: 00000000000000f8
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fcd9
RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000020000100
RBP: 00000000006ca018 R08: 00000000fffffffc R09: 00000000004002c8
R10: 00000000000004d1 R11: 0000000000000207 R12: 0000000000401600
R13: 0000000000401690 R14: 0000000000000000 R15: 0000000000000000

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline]
 kmsan_save_stack mm/kmsan/kmsan.c:293 [inline]
 kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:684
 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:528
 __crypto_xor+0x23c/0x16b0 crypto/algapi.c:1012
 crypto_xor include/crypto/algapi.h:210 [inline]
 ghash_update+0x9e4/0x1160 crypto/ghash-generic.c:74
 crypto_shash_update crypto/shash.c:117 [inline]
 shash_ahash_update crypto/shash.c:239 [inline]
 shash_async_update+0x290/0x360 crypto/shash.c:247
 crypto_ahash_update include/crypto/hash.h:522 [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+0x8b5/0x24a0 crypto/gcm.c:430
 gcm_encrypt_continue crypto/gcm.c:455 [inline]
 crypto_gcm_encrypt+0xa13/0xaf0 crypto/gcm.c:484
 big_key_crypt+0x73d/0x780 include/crypto/aead.h:370
 big_key_preparse+0x3df/0xec0 security/keys/big_key.c:243
 key_create_or_update+0x7a8/0x1a40 security/keys/key.c:849
 SYSC_add_key+0x6c2/0x960 security/keys/keyctl.c:122
 SyS_add_key+0x77/0xa0 security/keys/keyctl.c:62
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline]
 kmsan_save_stack mm/kmsan/kmsan.c:293 [inline]
 kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:684
 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:528
 __crypto_xor+0x23c/0x16b0 crypto/algapi.c:1012
 crypto_xor include/crypto/algapi.h:210 [inline]
 crypto_ctr_crypt_inplace+0x29a/0x3a0 crypto/ctr.c:115
 crypto_ctr_crypt+0x54c/0x7d0 crypto/ctr.c:142
 skcipher_crypt_blkcipher crypto/skcipher.c:623 [inline]
 skcipher_encrypt_blkcipher+0x222/0x320 crypto/skcipher.c:632
 crypto_skcipher_encrypt include/crypto/skcipher.h:443 [inline]
 crypto_gcm_encrypt+0x53e/0xaf0 crypto/gcm.c:483
 big_key_crypt+0x73d/0x780 include/crypto/aead.h:370
 big_key_preparse+0x3df/0xec0 security/keys/big_key.c:243
 key_create_or_update+0x7a8/0x1a40 security/keys/key.c:849
 SYSC_add_key+0x6c2/0x960 security/keys/keyctl.c:122
 SyS_add_key+0x77/0xa0 security/keys/keyctl.c:62
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline]
 kmsan_alloc_meta_for_pages+0x161/0x3a0 mm/kmsan/kmsan.c:814
 kmsan_alloc_page+0x82/0xe0 mm/kmsan/kmsan.c:868
 __alloc_pages_nodemask+0xf5b/0x5dc0 mm/page_alloc.c:4283
 alloc_pages_current+0x6b5/0x970 mm/mempolicy.c:2055
 alloc_pages include/linux/gfp.h:494 [inline]
 big_key_alloc_buffer+0x241/0xa00 security/keys/big_key.c:178
 big_key_preparse+0x20a/0xec0 security/keys/big_key.c:227
 key_create_or_update+0x7a8/0x1a40 security/keys/key.c:849
 SYSC_add_key+0x6c2/0x960 security/keys/keyctl.c:122
 SyS_add_key+0x77/0xa0 security/keys/keyctl.c:62
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
==================================================================

Crashes (1102):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-kmsan-gce	2018/04/24 09:27	https://github.com/google/kmsan.git master	d2d741e5	e7e85d36	.config	log	report	syz	C	davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/04/23 03:46	https://github.com/google/kmsan.git master	d2d741e5	d23fcf6c	.config	log	report	syz	C	davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/12 16:36	https://github.com/google/kmsan.git master	b64f7ec0	06c33b3a	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/02 13:18	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/02 13:10	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/02 12:08	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/02 10:44	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/02 09:22	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/02 07:16	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/02 05:57	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/02 03:45	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/02 02:37	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/02 01:10	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/02 00:43	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 23:09	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 22:09	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 21:09	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 19:57	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 18:11	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 16:42	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 16:17	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 15:00	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 13:06	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 11:45	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 10:12	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 09:04	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 07:16	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 06:15	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 04:53	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 03:40	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 02:31	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/07/01 00:47	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/06/30 23:06	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/06/30 20:44	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/06/30 19:38	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/06/30 18:23	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/06/30 18:21	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/06/30 14:49	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/06/30 13:35	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/06/30 12:34	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/06/30 10:36	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/06/30 08:12	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/06/30 07:10	https://github.com/google/kmsan.git master	12390609	dba0b50e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kmsan-gce	2018/04/23 02:43	https://github.com/google/kmsan.git master	d2d741e5	d23fcf6c	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org