KMSAN: uninit-value in aes_encrypt (2)

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit:    3c8ca708 test_kmsan.c: fix SPDX comment
git tree:       https://github.com/google/kmsan.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=14129497600000
kernel config:  https://syzkaller.appspot.com/x/.config?x=c07a3d4f8a59e198
dashboard link: https://syzkaller.appspot.com/bug?extid=9e3b178624a8a2f8fa28
compiler:       clang version 9.0.0 (/home/glider/llvm/clang  
80fee25776c2fb61e74c1ecb1a523375c2500b69)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11331128e00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=140b47ef600000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+9e3b178624a8a2f8fa28@xxxxxxxxxxxxxxxxxxxxxxxxx

IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
8021q: adding VLAN 0 to HW filter on device batadv0
=====================================================
BUG: KMSAN: uninit-value in subshift lib/crypto/aes.c:149 [inline]
BUG: KMSAN: uninit-value in aes_encrypt+0x12d5/0x1bd0 lib/crypto/aes.c:282
CPU: 0 PID: 12200 Comm: syz-executor134 Not tainted 5.4.0-rc3+ #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+0x14a/0x2f0 mm/kmsan/kmsan_report.c:110
 __msan_warning+0x73/0xf0 mm/kmsan/kmsan_instr.c:245
 subshift lib/crypto/aes.c:149 [inline]
 aes_encrypt+0x12d5/0x1bd0 lib/crypto/aes.c:282
 aesti_encrypt+0xe8/0x130 crypto/aes_ti.c:31
 crypto_cipher_encrypt_one include/linux/crypto.h:1763 [inline]
 crypto_cbcmac_digest_update+0x3cf/0x550 crypto/ccm.c:871
 crypto_shash_update crypto/shash.c:107 [inline]
 shash_ahash_finup+0x659/0xb20 crypto/shash.c:276
 shash_async_finup+0xbb/0x110 crypto/shash.c:291
 crypto_ahash_op+0x1cd/0x6e0 crypto/ahash.c:368
 crypto_ahash_finup+0x8c/0xb0 crypto/ahash.c:393
 crypto_ccm_auth+0x14b2/0x1570 crypto/ccm.c:230
 crypto_ccm_encrypt+0x283/0x840 crypto/ccm.c:309
 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: 0033:0x441cf9
Code: 43 02 00 85 c0 b8 00 00 00 00 48 0f 44 c3 5b c3 90 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 0b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00000000007eff08 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441cf9
RDX: fffffffffffffee0 RSI: 00000000200005c0 RDI: 0000000000000003
RBP: 00000000007eff30 R08: 0000000000000000 R09: 00000000000000b6
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000403490
R13: 0000000000403520 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/0x170 mm/kmsan/kmsan.c:319
 __msan_chain_origin+0x6b/0xe0 mm/kmsan/kmsan_instr.c:179
 __crypto_xor+0x1e8/0x1470 crypto/algapi.c:992
 crypto_xor include/crypto/algapi.h:213 [inline]
 crypto_cbcmac_digest_update+0x2ba/0x550 crypto/ccm.c:865
 crypto_shash_update crypto/shash.c:107 [inline]
 shash_ahash_finup+0x659/0xb20 crypto/shash.c:276
 shash_async_finup+0xbb/0x110 crypto/shash.c:291
 crypto_ahash_op+0x1cd/0x6e0 crypto/ahash.c:368
 crypto_ahash_finup+0x8c/0xb0 crypto/ahash.c:393
 crypto_ccm_auth+0x14b2/0x1570 crypto/ccm.c:230
 crypto_ccm_encrypt+0x283/0x840 crypto/ccm.c:309
 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+0x153/0x370 mm/kmsan/kmsan_shadow.c:391
 __alloc_pages_nodemask+0x149d/0x60c0 mm/page_alloc.c:4794
 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:2372
 sk_page_frag_refill+0xa4/0x330 net/core/sock.c:2392
 sk_msg_alloc+0x203/0x1050 net/core/skmsg.c:37
 tls_alloc_encrypted_msg net/tls/tls_sw.c:284 [inline]
 tls_sw_sendmsg+0xb56/0x2710 net/tls/tls_sw.c:953
 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
=====================================================


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