LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
* general protection fault in gcmaes_crypt_by_sg
@ 2018-10-06 13:04 syzbot
  2018-10-08 10:06 ` Ard Biesheuvel
  0 siblings, 1 reply; 4+ messages in thread
From: syzbot @ 2018-10-06 13:04 UTC (permalink / raw)
  To: bp, davem, herbert, hpa, linux-crypto, linux-kernel, mingo,
	syzkaller-bugs, tglx, x86

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@syzkaller.appspotmail.com

@\x19: 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


---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with  
syzbot.

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: general protection fault in gcmaes_crypt_by_sg
  2018-10-06 13:04 general protection fault in gcmaes_crypt_by_sg syzbot
@ 2018-10-08 10:06 ` Ard Biesheuvel
  2019-02-20 16:03   ` Dmitry Vyukov
  0 siblings, 1 reply; 4+ messages in thread
From: Ard Biesheuvel @ 2018-10-08 10:06 UTC (permalink / raw)
  To: syzbot, borisp, aviadye, davejwatson
  Cc: Borislav Petkov, David S. Miller, Herbert Xu, H. Peter Anvin,
	open list:HARDWARE RANDOM NUMBER GENERATOR CORE,
	Linux Kernel Mailing List, Ingo Molnar, syzkaller-bugs,
	Thomas Gleixner, the arch/x86 maintainers

(add the TLS maintainers)

On 6 October 2018 at 15:04, syzbot
<syzbot+c5048caf67d09ee24549@syzkaller.appspotmail.com> wrote:
> 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@syzkaller.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
>
>
> ---
> This bug is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at syzkaller@googlegroups.com.
>
> syzbot will keep track of this bug report. See:
> https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
> syzbot.

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: general protection fault in gcmaes_crypt_by_sg
  2018-10-08 10:06 ` Ard Biesheuvel
@ 2019-02-20 16:03   ` Dmitry Vyukov
  2019-02-26  7:33     ` Eric Biggers
  0 siblings, 1 reply; 4+ messages in thread
From: Dmitry Vyukov @ 2019-02-20 16:03 UTC (permalink / raw)
  To: Ard Biesheuvel
  Cc: syzbot, borisp, aviadye, davejwatson, Borislav Petkov,
	David S. Miller, Herbert Xu, H. Peter Anvin,
	open list:HARDWARE RANDOM NUMBER GENERATOR CORE,
	Linux Kernel Mailing List, Ingo Molnar, syzkaller-bugs,
	Thomas Gleixner, the arch/x86 maintainers

On Mon, Oct 8, 2018 at 12:06 PM Ard Biesheuvel
<ard.biesheuvel@linaro.org> wrote:
>
> (add the TLS maintainers)
>
> On 6 October 2018 at 15:04, syzbot
> <syzbot+c5048caf67d09ee24549@syzkaller.appspotmail.com> wrote:
> > 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@syzkaller.appspotmail.com


This last happened 4 months ago. Probably fixed by something?
Candidate for closure as obsolete.

> > @ : 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
> >
> >
> > ---
> > This bug is generated by a bot. It may contain errors.
> > See https://goo.gl/tpsmEJ for more information about syzbot.
> > syzbot engineers can be reached at syzkaller@googlegroups.com.
> >
> > syzbot will keep track of this bug report. See:
> > https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
> > syzbot.
>
> --
> You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/CAKv%2BGu_-7AWaQhLdc4KLwowUZjKV0zy8spWnFELEyk-Bya%2B77A%40mail.gmail.com.
> For more options, visit https://groups.google.com/d/optout.

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: general protection fault in gcmaes_crypt_by_sg
  2019-02-20 16:03   ` Dmitry Vyukov
@ 2019-02-26  7:33     ` Eric Biggers
  0 siblings, 0 replies; 4+ messages in thread
From: Eric Biggers @ 2019-02-26  7:33 UTC (permalink / raw)
  To: Dmitry Vyukov
  Cc: Ard Biesheuvel, syzbot, borisp, aviadye, davejwatson,
	Borislav Petkov, David S. Miller, Herbert Xu, H. Peter Anvin,
	open list:HARDWARE RANDOM NUMBER GENERATOR CORE,
	Linux Kernel Mailing List, Ingo Molnar, syzkaller-bugs,
	Thomas Gleixner, the arch/x86 maintainers

On Wed, Feb 20, 2019 at 05:03:38PM +0100, 'Dmitry Vyukov' via syzkaller-bugs wrote:
> On Mon, Oct 8, 2018 at 12:06 PM Ard Biesheuvel
> <ard.biesheuvel@linaro.org> wrote:
> >
> > (add the TLS maintainers)
> >
> > On 6 October 2018 at 15:04, syzbot
> > <syzbot+c5048caf67d09ee24549@syzkaller.appspotmail.com> wrote:
> > > 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@syzkaller.appspotmail.com
> 
> 
> This last happened 4 months ago. Probably fixed by something?
> Candidate for closure as obsolete.
> 
> > > @ : 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
> > >
> > >
> > > ---
> > > This bug is generated by a bot. It may contain errors.
> > > See https://goo.gl/tpsmEJ for more information about syzbot.
> > > syzbot engineers can be reached at syzkaller@googlegroups.com.
> > >
> > > syzbot will keep track of this bug report. See:
> > > https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
> > > syzbot.
> >
> > --
> > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group.
> > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com.
> > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/CAKv%2BGu_-7AWaQhLdc4KLwowUZjKV0zy8spWnFELEyk-Bya%2B77A%40mail.gmail.com.
> > For more options, visit https://groups.google.com/d/optout.
> 
> -- 
> You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/CACT4Y%2BYqC91oC_%3D%3DO780gNmOeJmyOn9QR0VRxNtFNJrhp%3Dt7Vg%40mail.gmail.com.

(As with the other reports of this...)

AFAICS this was fixed by this commit:

	commit d829e9c4112b52f4f00195900fd4c685f61365ab
	Author: Daniel Borkmann <daniel@iogearbox.net>
	Date:   Sat Oct 13 02:45:59 2018 +0200

	    tls: convert to generic sk_msg interface

So telling syzbot:

#syz fix: tls: convert to generic sk_msg interface

The issue was that described in this comment in tls_sw_sendmsg():

                /* Open records defined only if successfully copied, otherwise
                 * we would trim the sg but not reset the open record frags.
                 */
                tls_ctx->pending_open_record_frags = true;

Basically, on sendmsg() to a TLS socket, if the message buffer was partially
unmapped, a TLS record would be marked as pending (and then tried to be sent at
sock_release() time) even though it had actually been discarded.

- Eric

^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2019-02-26  7:33 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-10-06 13:04 general protection fault in gcmaes_crypt_by_sg syzbot
2018-10-08 10:06 ` Ard Biesheuvel
2019-02-20 16:03   ` Dmitry Vyukov
2019-02-26  7:33     ` Eric Biggers

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).