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KMSAN: uninit-value in gf128mul_4k_lle (3)

Status: fixed on 2019/11/29 15:48
Subsystems: crypto
[Documentation on labels]
Reported-by: syzbot+f8495bff23a879a6d0bd@syzkaller.appspotmail.com
Fix commit: 683916f6a840 net/tls: fix sk_msg trim on fallback to copy mode
First crash: 1989d, last: 1613d
▶ ▼ Discussions (6)
Title Replies (including bot) Last reply
[PATCH 5.3 000/193] 5.3.11-stable review 200 (200) 2019/11/12 18:26
[PATCH net v2] net/tls: fix sk_msg trim on fallback to copy mode 3 (3) 2019/11/06 02:08
[PATCH net] net/tls: fix sk_msg trim on fallback to copy mode 14 (14) 2019/11/04 22:58
Reminder: 6 active syzbot reports in "net/tls" subsystem 1 (1) 2019/08/16 04:18
Reminder: 17 open syzbot bugs in "net/tls" subsystem 1 (1) 2019/06/25 05:50
KMSAN: uninit-value in gf128mul_4k_lle (3) 3 (4) 2019/06/10 22:25
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in gf128mul_4k_lle (2) crypto C 1102 2113d 2132d 0/26 closed as invalid on 2018/07/17 13:23
upstream KMSAN: uninit-value in gf128mul_4k_lle (4) crypto C 6 1375d 1376d 0/26 closed as invalid on 2020/07/22 14:12
upstream KMSAN: uninit-value in gf128mul_4k_lle crypto C 11 2194d 2209d 0/26 closed as invalid on 2018/04/22 15:44

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in u128_xor include/crypto/b128ops.h:66 [inline]
BUG: KMSAN: uninit-value in be128_xor include/crypto/b128ops.h:72 [inline]
BUG: KMSAN: uninit-value in gf128mul_4k_lle+0x1fb/0x2b0 crypto/gf128mul.c:394
CPU: 1 PID: 12578 Comm: syz-executor941 Not tainted 5.4.0-rc5+ #0
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+0x191/0x1f0 lib/dump_stack.c:113
 kmsan_report+0x128/0x220 mm/kmsan/kmsan_report.c:108
 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:245
 u128_xor include/crypto/b128ops.h:66 [inline]
 be128_xor include/crypto/b128ops.h:72 [inline]
 gf128mul_4k_lle+0x1fb/0x2b0 crypto/gf128mul.c:394
 ghash_update+0x9db/0x1130 crypto/ghash-generic.c:103
 crypto_shash_update crypto/shash.c:107 [inline]
 shash_ahash_update+0x53a/0x650 crypto/shash.c:247
 shash_async_update+0x50/0x60 crypto/shash.c:255
 crypto_ahash_update include/crypto/hash.h:534 [inline]
 gcm_hash_update crypto/gcm.c:219 [inline]
 gcm_hash_assoc_remain_continue crypto/gcm.c:328 [inline]
 gcm_hash_assoc_continue crypto/gcm.c:359 [inline]
 gcm_hash_init_continue crypto/gcm.c:384 [inline]
 gcm_hash+0x15d8/0x2400 crypto/gcm.c:414
 gcm_encrypt_continue crypto/gcm.c:439 [inline]
 crypto_gcm_encrypt+0x710/0x9e0 crypto/gcm.c:468
 crypto_aead_encrypt+0xf2/0x180 crypto/aead.c:99
 tls_do_encryption net/tls/tls_sw.c:521 [inline]
 tls_push_record+0x341e/0x4e50 net/tls/tls_sw.c:730
 bpf_exec_tx_verdict+0x1454/0x1c80 net/tls/tls_sw.c:770
 tls_sw_sendmsg+0x158d/0x2710 net/tls/tls_sw.c:1033
 inet6_sendmsg+0x2d8/0x2e0 net/ipv6/af_inet6.c:576
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg net/socket.c:657 [inline]
 __sys_sendto+0x8fc/0xc70 net/socket.c:1952
 __do_sys_sendto net/socket.c:1964 [inline]
 __se_sys_sendto+0x107/0x130 net/socket.c:1960
 __x64_sys_sendto+0x6e/0x90 net/socket.c:1960
 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x441469
Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd5fe92c98 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441469
RDX: ffffffffffffffc1 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 00000000006cb018 R08: 0000000000000000 R09: fffffffffffffe5b
R10: 0000000000000040 R11: 0000000000000246 R12: 00000000004021e0
R13: 0000000000402270 R14: 0000000000000000 R15: 0000000000000000

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:151 [inline]
 kmsan_internal_chain_origin+0xbd/0x180 mm/kmsan/kmsan.c:319
 __msan_chain_origin+0x6b/0xd0 mm/kmsan/kmsan_instr.c:179
 crypto_xor include/crypto/algapi.h:209 [inline]
 ghash_update+0xa83/0x1130 crypto/ghash-generic.c:102
 crypto_shash_update crypto/shash.c:107 [inline]
 shash_ahash_update+0x53a/0x650 crypto/shash.c:247
 shash_async_update+0x50/0x60 crypto/shash.c:255
 crypto_ahash_update include/crypto/hash.h:534 [inline]
 gcm_hash_update crypto/gcm.c:219 [inline]
 gcm_hash_assoc_remain_continue crypto/gcm.c:328 [inline]
 gcm_hash_assoc_continue crypto/gcm.c:359 [inline]
 gcm_hash_init_continue crypto/gcm.c:384 [inline]
 gcm_hash+0x15d8/0x2400 crypto/gcm.c:414
 gcm_encrypt_continue crypto/gcm.c:439 [inline]
 crypto_gcm_encrypt+0x710/0x9e0 crypto/gcm.c:468
 crypto_aead_encrypt+0xf2/0x180 crypto/aead.c:99
 tls_do_encryption net/tls/tls_sw.c:521 [inline]
 tls_push_record+0x341e/0x4e50 net/tls/tls_sw.c:730
 bpf_exec_tx_verdict+0x1454/0x1c80 net/tls/tls_sw.c:770
 tls_sw_sendmsg+0x158d/0x2710 net/tls/tls_sw.c:1033
 inet6_sendmsg+0x2d8/0x2e0 net/ipv6/af_inet6.c:576
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg net/socket.c:657 [inline]
 __sys_sendto+0x8fc/0xc70 net/socket.c:1952
 __do_sys_sendto net/socket.c:1964 [inline]
 __se_sys_sendto+0x107/0x130 net/socket.c:1960
 __x64_sys_sendto+0x6e/0x90 net/socket.c:1960
 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:151 [inline]
 kmsan_internal_chain_origin+0xbd/0x180 mm/kmsan/kmsan.c:319
 __msan_chain_origin+0x6b/0xd0 mm/kmsan/kmsan_instr.c:179
 __crypto_xor+0x1e8/0x1470 crypto/algapi.c:992
 crypto_xor include/crypto/algapi.h:213 [inline]
 crypto_ctr_crypt_inplace crypto/ctr.c:87 [inline]
 crypto_ctr_crypt+0x613/0xaf0 crypto/ctr.c:111
 crypto_skcipher_encrypt+0xd2/0x150 crypto/skcipher.c:855
 crypto_gcm_encrypt+0x4a5/0x9e0 crypto/gcm.c:467
 crypto_aead_encrypt+0xf2/0x180 crypto/aead.c:99
 tls_do_encryption net/tls/tls_sw.c:521 [inline]
 tls_push_record+0x341e/0x4e50 net/tls/tls_sw.c:730
 bpf_exec_tx_verdict+0x1454/0x1c80 net/tls/tls_sw.c:770
 tls_sw_sendmsg+0x158d/0x2710 net/tls/tls_sw.c:1033
 inet6_sendmsg+0x2d8/0x2e0 net/ipv6/af_inet6.c:576
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg net/socket.c:657 [inline]
 __sys_sendto+0x8fc/0xc70 net/socket.c:1952
 __do_sys_sendto net/socket.c:1964 [inline]
 __se_sys_sendto+0x107/0x130 net/socket.c:1960
 __x64_sys_sendto+0x6e/0x90 net/socket.c:1960
 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7

Uninit was created at:
 kmsan_save_stack_with_flags+0x3f/0x90 mm/kmsan/kmsan.c:151
 kmsan_internal_alloc_meta_for_pages mm/kmsan/kmsan_shadow.c:362 [inline]
 kmsan_alloc_page+0x153/0x360 mm/kmsan/kmsan_shadow.c:391
 __alloc_pages_nodemask+0x149d/0x60c0 mm/page_alloc.c:4796
 alloc_pages_current+0x68d/0x9a0 mm/mempolicy.c:2188
 alloc_pages include/linux/gfp.h:511 [inline]
 skb_page_frag_refill+0x2b0/0x580 net/core/sock.c:2376
 sk_page_frag_refill+0xa4/0x330 net/core/sock.c:2396
 tcp_sendmsg_locked+0x29e2/0x6a00 net/ipv4/tcp.c:1320
 tcp_sendmsg+0xb2/0x100 net/ipv4/tcp.c:1436
 inet6_sendmsg+0x178/0x2e0 net/ipv6/af_inet6.c:576
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg net/socket.c:657 [inline]
 __sys_sendto+0x8fc/0xc70 net/socket.c:1952
 __do_sys_sendto net/socket.c:1964 [inline]
 __se_sys_sendto+0x107/0x130 net/socket.c:1960
 __x64_sys_sendto+0x6e/0x90 net/socket.c:1960
 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
=====================================================

Crashes (2958):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/11/16 09:06 https://github.com/google/kmsan.git master 9c6a71628ab9 cdac920b .config console log report syz C ci-upstream-kmsan-gce
2019/08/21 00:28 https://github.com/google/kmsan.git master 61ccdad1fcdf cfc9868f .config console log report syz C ci-upstream-kmsan-gce
2019/07/19 03:54 https://github.com/google/kmsan.git master beaab8a31e0d 7bb222f7 .config console log report syz C ci-upstream-kmsan-gce
2018/11/18 04:41 https://github.com/google/kmsan.git master cddc52641fd2 adf636a8 .config console log report syz C ci-upstream-kmsan-gce
2019/11/24 00:38 https://github.com/google/kmsan.git master 4a1d41e39c62 598ca6c8 .config console log report ci-upstream-kmsan-gce
2019/11/23 00:47 https://github.com/google/kmsan.git master b7a871998d3e 598ca6c8 .config console log report ci-upstream-kmsan-gce
2019/11/22 22:44 https://github.com/google/kmsan.git master b7a871998d3e 598ca6c8 .config console log report ci-upstream-kmsan-gce
2019/11/22 20:29 https://github.com/google/kmsan.git master b7a871998d3e 598ca6c8 .config console log report ci-upstream-kmsan-gce
2019/11/22 18:03 https://github.com/google/kmsan.git master b7a871998d3e 598ca6c8 .config console log report ci-upstream-kmsan-gce
2019/11/22 13:04 https://github.com/google/kmsan.git master b7a871998d3e 598ca6c8 .config console log report ci-upstream-kmsan-gce
2019/11/22 11:18 https://github.com/google/kmsan.git master b7a871998d3e 8098ea0f .config console log report ci-upstream-kmsan-gce
2019/11/22 08:29 https://github.com/google/kmsan.git master b7a871998d3e 8098ea0f .config console log report ci-upstream-kmsan-gce
2019/11/21 23:41 https://github.com/google/kmsan.git master 287021d5afde 8098ea0f .config console log report ci-upstream-kmsan-gce
2019/11/21 20:26 https://github.com/google/kmsan.git master 287021d5afde 8098ea0f .config console log report ci-upstream-kmsan-gce
2019/11/21 18:15 https://github.com/google/kmsan.git master 287021d5afde 8098ea0f .config console log report ci-upstream-kmsan-gce
2019/11/21 16:49 https://github.com/google/kmsan.git master 287021d5afde 8098ea0f .config console log report ci-upstream-kmsan-gce
2019/11/21 15:06 https://github.com/google/kmsan.git master 3db92f3b3586 8098ea0f .config console log report ci-upstream-kmsan-gce
2019/11/21 11:59 https://github.com/google/kmsan.git master 3db92f3b3586 8098ea0f .config console log report ci-upstream-kmsan-gce
2019/11/21 08:16 https://github.com/google/kmsan.git master 3db92f3b3586 8098ea0f .config console log report ci-upstream-kmsan-gce
2019/11/21 06:46 https://github.com/google/kmsan.git master 3db92f3b3586 8098ea0f .config console log report ci-upstream-kmsan-gce
2019/11/21 04:17 https://github.com/google/kmsan.git master 3db92f3b3586 8098ea0f .config console log report ci-upstream-kmsan-gce
2019/11/21 03:06 https://github.com/google/kmsan.git master 3db92f3b3586 8098ea0f .config console log report ci-upstream-kmsan-gce
2019/11/21 01:40 https://github.com/google/kmsan.git master 3db92f3b3586 8098ea0f .config console log report ci-upstream-kmsan-gce
2019/11/20 22:00 https://github.com/google/kmsan.git master 3db92f3b3586 8098ea0f .config console log report ci-upstream-kmsan-gce
2019/11/20 19:08 https://github.com/google/kmsan.git master 9c6a71628ab9 f4b7ed07 .config console log report ci-upstream-kmsan-gce
2019/11/20 18:06 https://github.com/google/kmsan.git master 9c6a71628ab9 f4b7ed07 .config console log report ci-upstream-kmsan-gce
2019/11/20 16:57 https://github.com/google/kmsan.git master 9c6a71628ab9 f4b7ed07 .config console log report ci-upstream-kmsan-gce
2019/11/20 15:55 https://github.com/google/kmsan.git master 9c6a71628ab9 f4b7ed07 .config console log report ci-upstream-kmsan-gce
2019/11/20 13:34 https://github.com/google/kmsan.git master 9c6a71628ab9 f4b7ed07 .config console log report ci-upstream-kmsan-gce
2019/11/20 12:22 https://github.com/google/kmsan.git master 9c6a71628ab9 f4b7ed07 .config console log report ci-upstream-kmsan-gce
2019/11/20 10:30 https://github.com/google/kmsan.git master 9c6a71628ab9 f4b7ed07 .config console log report ci-upstream-kmsan-gce
2019/11/20 05:05 https://github.com/google/kmsan.git master 9c6a71628ab9 f4b7ed07 .config console log report ci-upstream-kmsan-gce
2019/11/20 05:02 https://github.com/google/kmsan.git master 9c6a71628ab9 f4b7ed07 .config console log report ci-upstream-kmsan-gce
2019/11/20 03:49 https://github.com/google/kmsan.git master 9c6a71628ab9 f4b7ed07 .config console log report ci-upstream-kmsan-gce
2019/11/20 01:51 https://github.com/google/kmsan.git master 9c6a71628ab9 5bc70212 .config console log report ci-upstream-kmsan-gce
2019/11/19 23:48 https://github.com/google/kmsan.git master 9c6a71628ab9 5bc70212 .config console log report ci-upstream-kmsan-gce
2019/11/19 20:19 https://github.com/google/kmsan.git master 9c6a71628ab9 5bc70212 .config console log report ci-upstream-kmsan-gce
2019/11/19 18:49 https://github.com/google/kmsan.git master 9c6a71628ab9 5bc70212 .config console log report ci-upstream-kmsan-gce
2019/11/19 17:51 https://github.com/google/kmsan.git master 9c6a71628ab9 5bc70212 .config console log report ci-upstream-kmsan-gce
2019/11/19 15:40 https://github.com/google/kmsan.git master 9c6a71628ab9 5bc70212 .config console log report ci-upstream-kmsan-gce
2019/11/19 13:15 https://github.com/google/kmsan.git master 9c6a71628ab9 5bc70212 .config console log report ci-upstream-kmsan-gce
2019/11/19 10:48 https://github.com/google/kmsan.git master 9c6a71628ab9 5bc70212 .config console log report ci-upstream-kmsan-gce
2019/11/19 04:29 https://github.com/google/kmsan.git master 9c6a71628ab9 5bc70212 .config console log report ci-upstream-kmsan-gce
2019/11/18 23:41 https://github.com/google/kmsan.git master 9c6a71628ab9 1daed50a .config console log report ci-upstream-kmsan-gce
2019/11/18 22:39 https://github.com/google/kmsan.git master 9c6a71628ab9 1daed50a .config console log report ci-upstream-kmsan-gce
2019/11/18 22:37 https://github.com/google/kmsan.git master 9c6a71628ab9 1daed50a .config console log report ci-upstream-kmsan-gce
2019/11/18 21:33 https://github.com/google/kmsan.git master 9c6a71628ab9 1daed50a .config console log report ci-upstream-kmsan-gce
2019/11/18 14:20 https://github.com/google/kmsan.git master 9c6a71628ab9 1daed50a .config console log report ci-upstream-kmsan-gce
2019/11/18 09:40 https://github.com/google/kmsan.git master 9c6a71628ab9 d5696d51 .config console log report ci-upstream-kmsan-gce
2019/11/18 06:56 https://github.com/google/kmsan.git master 9c6a71628ab9 d5696d51 .config console log report ci-upstream-kmsan-gce
2019/11/18 04:40 https://github.com/google/kmsan.git master 9c6a71628ab9 d5696d51 .config console log report ci-upstream-kmsan-gce
2019/11/18 03:00 https://github.com/google/kmsan.git master 9c6a71628ab9 d5696d51 .config console log report ci-upstream-kmsan-gce
2018/11/12 22:35 https://github.com/google/kmsan.git master 644011fe6d60 74dbb806 .config console log report ci-upstream-kmsan-gce
* Struck through repros no longer work on HEAD.