general protection fault in gcmaes_crypt_by_sg

From: syzbot
Date: Sat Oct 06 2018 - 09:04:06 EST

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@xxxxxxxxxxxxxxxxxxxxxxxxx

@: 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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