Message-ID: <000000000000b3b10305778f05f5@google.com>
Date:   Sat, 06 Oct 2018 06:04:03 -0700
From:   syzbot <syzbot+c5048caf67d09ee24549@...kaller.appspotmail.com>
To:     bp@...en8.de, davem@...emloft.net, herbert@...dor.apana.org.au,
        hpa@...or.com, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org, mingo@...hat.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de, x86@...nel.org
Subject: general protection fault in gcmaes_crypt_by_sg

Hello,

syzbot found the following crash on:

HEAD commit:    12ffaa1197f5 Add linux-next specific files for 20181005
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=16cb7806400000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d6b058a7232046f
dashboard link: https://syzkaller.appspot.com/bug?extid=c5048caf67d09ee24549
compiler:       gcc (GCC) 8.0.1 20180413 (experimental)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+c5048caf67d09ee24549@...kaller.appspotmail.com

@.: renamed from ip6gre0
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 1510 Comm: syz-executor0 Not tainted 4.19.0-rc6-next-20181005+  
#88
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:73 [inline]
RIP: 0010:gcmaes_crypt_by_sg+0x56f/0x2110  
arch/x86/crypto/aesni-intel_glue.c:834
Code: c1 e9 03 80 3c 11 00 0f 85 bf 18 00 00 48 8d 78 08 48 89 84 24 50 01  
00 00 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 <0f> b6 14 11 84  
d2 74 09 80 fa 03 0f 8e 6b 15 00 00 44 8b 60 08 48
RSP: 0018:ffff8801852bf120 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff88019023c6b0 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8359e06c RDI: 0000000000000008
RBP: ffff8801852bf520 R08: ffff8801850c4300 R09: ffff8801befb0060
R10: ffff8801852bf7b0 R11: ffff8801852bf7db R12: 000000000000000d
R13: 000000000000000d R14: ffff8801852bf238 R15: ffff8801852bf7d0
FS:  00000000025d3940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d128000 CR3: 00000001cd273000 CR4: 00000000001406e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
  gcmaes_encrypt.constprop.17+0x7d7/0x1190  
arch/x86/crypto/aesni-intel_glue.c:929
  generic_gcmaes_encrypt+0x12d/0x186 arch/x86/crypto/aesni-intel_glue.c:1294
  crypto_aead_encrypt include/crypto/aead.h:364 [inline]
  gcmaes_wrapper_encrypt+0x162/0x200 arch/x86/crypto/aesni-intel_glue.c:1127
  crypto_aead_encrypt include/crypto/aead.h:364 [inline]
  tls_do_encryption net/tls/tls_sw.c:534 [inline]
  tls_push_record+0xc12/0x17f0 net/tls/tls_sw.c:583
  tls_sw_push_pending_record+0x22/0x30 net/tls/tls_sw.c:597
  tls_handle_open_record net/tls/tls_main.c:155 [inline]
  tls_sk_proto_close+0x439/0x750 net/tls/tls_main.c:272
  inet_release+0x104/0x1f0 net/ipv4/af_inet.c:428
  inet6_release+0x50/0x70 net/ipv6/af_inet6.c:458
  __sock_release+0xd7/0x250 net/socket.c:580
  sock_close+0x19/0x20 net/socket.c:1142
  __fput+0x3bc/0xa70 fs/file_table.c:279
  ____fput+0x15/0x20 fs/file_table.c:312
  task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
  tracehook_notify_resume include/linux/tracehook.h:188 [inline]
  exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
  prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
  syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
  do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
  entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x411051
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48  
83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48  
89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007fff40f9a8d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000411051
RDX: 0000001b2da20000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000049ccd1ef R09: 0000000049ccd1f3
R10: 00007fff40f9a800 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 000000000000010c R15: 0000000000000000
Modules linked in:
---[ end trace a8f523110d8ca375 ]---
RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:73 [inline]
RIP: 0010:gcmaes_crypt_by_sg+0x56f/0x2110  
arch/x86/crypto/aesni-intel_glue.c:834
Code: c1 e9 03 80 3c 11 00 0f 85 bf 18 00 00 48 8d 78 08 48 89 84 24 50 01  
00 00 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 <0f> b6 14 11 84  
d2 74 09 80 fa 03 0f 8e 6b 15 00 00 44 8b 60 08 48
RSP: 0018:ffff8801852bf120 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff88019023c6b0 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8359e06c RDI: 0000000000000008
RBP: ffff8801852bf520 R08: ffff8801850c4300 R09: ffff8801befb0060
R10: ffff8801852bf7b0 R11: ffff8801852bf7db R12: 000000000000000d
R13: 000000000000000d R14: ffff8801852bf238 R15: ffff8801852bf7d0
FS:  00000000025d3940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d128000 CR3: 00000001cd273000 CR4: 00000000001406e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600


---
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