Hello,
syzbot found the following crash on:
HEAD commit: fd0bfa8d6e04 Merge branch 'bpf-af-xdp-cleanups'
git tree: bpf-next
console output: https://syzkaller.appspot.com/x/log.txt?x=11da9427800000
kernel config: https://syzkaller.appspot.com/x/.config?x=b632d8e2c2ab2c1
dashboard link: https://syzkaller.appspot.com/bug?extid=0ce137753c78f7b6acc1
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: [email protected]
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
(ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 12139 Comm: syz-executor2 Not tainted 4.17.0-rc4+ #17
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:__hlist_del include/linux/list.h:649 [inline]
RIP: 0010:hlist_del_rcu include/linux/rculist.h:427 [inline]
RIP: 0010:bpf_tcp_close+0x7d2/0xf80 kernel/bpf/sockmap.c:271
RSP: 0018:ffff8801a8f8ef70 EFLAGS: 00010a02
RAX: ffffed00351f1dfd RBX: dffffc0000000000 RCX: dead000000000200
RDX: 0000000000000000 RSI: 1bd5a00000000040 RDI: ffff8801cb710910
RBP: ffff8801a8f8f110 R08: ffffed003350ac9d R09: ffffed003350ac9c
R10: ffffed003350ac9c R11: ffff88019a8564e3 R12: ffff8801cb710380
R13: ffff8801b17ea6e0 R14: ffff8801cb710398 R15: ffff8801cb710900
FS: 00007f9890c43700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fde1a668000 CR3: 000000019dca2000 CR4: 00000000001406f0
DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
inet_release+0x104/0x1f0 net/ipv4/af_inet.c:427
inet6_release+0x50/0x70 net/ipv6/af_inet6.c:459
sock_release+0x96/0x1b0 net/socket.c:594
sock_close+0x16/0x20 net/socket.c:1149
__fput+0x34d/0x890 fs/file_table.c:209
____fput+0x15/0x20 fs/file_table.c:243
task_work_run+0x1e4/0x290 kernel/task_work.c:113
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0x1aee/0x2730 kernel/exit.c:865
do_group_exit+0x16f/0x430 kernel/exit.c:968
get_signal+0x886/0x1960 kernel/signal.c:2469
do_signal+0x98/0x2040 arch/x86/kernel/signal.c:810
exit_to_usermode_loop+0x28a/0x310 arch/x86/entry/common.c:162
prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
syscall_return_slowpath arch/x86/entry/common.c:265 [inline]
do_syscall_64+0x6ac/0x800 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455a09
RSP: 002b:00007f9890c42ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000072bec8 RCX: 0000000000455a09
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000072bec8
RBP: 000000000072bec8 R08: 0000000000000000 R09: 000000000072bea0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcb48ac3ff R14: 00007f9890c439c0 R15: 0000000000000000
Code: ff 48 c1 e9 03 80 3c 19 00 0f 85 a9 05 00 00 49 8b 4f 18 48 8b 85 98
fe ff ff 48 89 ce c6 00 00 48 c1 ee 03 48 89 95 d8 fe ff ff <80> 3c 1e 00
0f 85 c6 05 00 00 48 8b 85 98 fe ff ff 48 85 d2 48
RIP: __hlist_del include/linux/list.h:649 [inline] RSP: ffff8801a8f8ef70
RIP: hlist_del_rcu include/linux/rculist.h:427 [inline] RSP:
ffff8801a8f8ef70
RIP: bpf_tcp_close+0x7d2/0xf80 kernel/bpf/sockmap.c:271 RSP:
ffff8801a8f8ef70
---[ end trace e81227e93c7e7b75 ]---
---
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 [email protected].
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
syzbot.
[ +John ]
On 05/26/2018 11:13 AM, syzbot wrote:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: fd0bfa8d6e04 Merge branch 'bpf-af-xdp-cleanups'
> git tree: bpf-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=11da9427800000
> kernel config: https://syzkaller.appspot.com/x/.config?x=b632d8e2c2ab2c1
> dashboard link: https://syzkaller.appspot.com/bug?extid=0ce137753c78f7b6acc1
> 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: [email protected]
Should be fixed by: https://patchwork.ozlabs.org/patch/920695/
> kasan: CONFIG_KASAN_INLINE enabled
> kasan: GPF could be caused by NULL-ptr deref or user memory access
> general protection fault: 0000 [#1] SMP KASAN
> Dumping ftrace buffer:
> (ftrace buffer empty)
> Modules linked in:
> CPU: 0 PID: 12139 Comm: syz-executor2 Not tainted 4.17.0-rc4+ #17
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
> RIP: 0010:__hlist_del include/linux/list.h:649 [inline]
> RIP: 0010:hlist_del_rcu include/linux/rculist.h:427 [inline]
> RIP: 0010:bpf_tcp_close+0x7d2/0xf80 kernel/bpf/sockmap.c:271
> RSP: 0018:ffff8801a8f8ef70 EFLAGS: 00010a02
> RAX: ffffed00351f1dfd RBX: dffffc0000000000 RCX: dead000000000200
> RDX: 0000000000000000 RSI: 1bd5a00000000040 RDI: ffff8801cb710910
> RBP: ffff8801a8f8f110 R08: ffffed003350ac9d R09: ffffed003350ac9c
> R10: ffffed003350ac9c R11: ffff88019a8564e3 R12: ffff8801cb710380
> R13: ffff8801b17ea6e0 R14: ffff8801cb710398 R15: ffff8801cb710900
> FS: 00007f9890c43700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007fde1a668000 CR3: 000000019dca2000 CR4: 00000000001406f0
> DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
> Call Trace:
> inet_release+0x104/0x1f0 net/ipv4/af_inet.c:427
> inet6_release+0x50/0x70 net/ipv6/af_inet6.c:459
> sock_release+0x96/0x1b0 net/socket.c:594
> sock_close+0x16/0x20 net/socket.c:1149
> __fput+0x34d/0x890 fs/file_table.c:209
> ____fput+0x15/0x20 fs/file_table.c:243
> task_work_run+0x1e4/0x290 kernel/task_work.c:113
> exit_task_work include/linux/task_work.h:22 [inline]
> do_exit+0x1aee/0x2730 kernel/exit.c:865
> do_group_exit+0x16f/0x430 kernel/exit.c:968
> get_signal+0x886/0x1960 kernel/signal.c:2469
> do_signal+0x98/0x2040 arch/x86/kernel/signal.c:810
> exit_to_usermode_loop+0x28a/0x310 arch/x86/entry/common.c:162
> prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
> syscall_return_slowpath arch/x86/entry/common.c:265 [inline]
> do_syscall_64+0x6ac/0x800 arch/x86/entry/common.c:290
> entry_SYSCALL_64_after_hwframe+0x49/0xbe
> RIP: 0033:0x455a09
> RSP: 002b:00007f9890c42ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
> RAX: fffffffffffffe00 RBX: 000000000072bec8 RCX: 0000000000455a09
> RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000072bec8
> RBP: 000000000072bec8 R08: 0000000000000000 R09: 000000000072bea0
> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
> R13: 00007ffcb48ac3ff R14: 00007f9890c439c0 R15: 0000000000000000
> Code: ff 48 c1 e9 03 80 3c 19 00 0f 85 a9 05 00 00 49 8b 4f 18 48 8b 85 98 fe ff ff 48 89 ce c6 00 00 48 c1 ee 03 48 89 95 d8 fe ff ff <80> 3c 1e 00 0f 85 c6 05 00 00 48 8b 85 98 fe ff ff 48 85 d2 48
> RIP: __hlist_del include/linux/list.h:649 [inline] RSP: ffff8801a8f8ef70
> RIP: hlist_del_rcu include/linux/rculist.h:427 [inline] RSP: ffff8801a8f8ef70
> RIP: bpf_tcp_close+0x7d2/0xf80 kernel/bpf/sockmap.c:271 RSP: ffff8801a8f8ef70
> ---[ end trace e81227e93c7e7b75 ]---
>
>
> ---
> 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 [email protected].
>
> syzbot will keep track of this bug report. See:
> https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot.
On Mon, May 28, 2018 at 12:15 AM, Daniel Borkmann <[email protected]> wrote:
> [ +John ]
>
> On 05/26/2018 11:13 AM, syzbot wrote:
>> Hello,
>>
>> syzbot found the following crash on:
>>
>> HEAD commit: fd0bfa8d6e04 Merge branch 'bpf-af-xdp-cleanups'
>> git tree: bpf-next
>> console output: https://syzkaller.appspot.com/x/log.txt?x=11da9427800000
>> kernel config: https://syzkaller.appspot.com/x/.config?x=b632d8e2c2ab2c1
>> dashboard link: https://syzkaller.appspot.com/bug?extid=0ce137753c78f7b6acc1
>> 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: [email protected]
>
> Should be fixed by: https://patchwork.ozlabs.org/patch/920695/
#syz fix: bpf: sockhash fix race with bpf_tcp_close and map delete
>> kasan: CONFIG_KASAN_INLINE enabled
>> kasan: GPF could be caused by NULL-ptr deref or user memory access
>> general protection fault: 0000 [#1] SMP KASAN
>> Dumping ftrace buffer:
>> (ftrace buffer empty)
>> Modules linked in:
>> CPU: 0 PID: 12139 Comm: syz-executor2 Not tainted 4.17.0-rc4+ #17
>> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
>> RIP: 0010:__hlist_del include/linux/list.h:649 [inline]
>> RIP: 0010:hlist_del_rcu include/linux/rculist.h:427 [inline]
>> RIP: 0010:bpf_tcp_close+0x7d2/0xf80 kernel/bpf/sockmap.c:271
>> RSP: 0018:ffff8801a8f8ef70 EFLAGS: 00010a02
>> RAX: ffffed00351f1dfd RBX: dffffc0000000000 RCX: dead000000000200
>> RDX: 0000000000000000 RSI: 1bd5a00000000040 RDI: ffff8801cb710910
>> RBP: ffff8801a8f8f110 R08: ffffed003350ac9d R09: ffffed003350ac9c
>> R10: ffffed003350ac9c R11: ffff88019a8564e3 R12: ffff8801cb710380
>> R13: ffff8801b17ea6e0 R14: ffff8801cb710398 R15: ffff8801cb710900
>> FS: 00007f9890c43700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
>> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> CR2: 00007fde1a668000 CR3: 000000019dca2000 CR4: 00000000001406f0
>> DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000
>> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
>> Call Trace:
>> inet_release+0x104/0x1f0 net/ipv4/af_inet.c:427
>> inet6_release+0x50/0x70 net/ipv6/af_inet6.c:459
>> sock_release+0x96/0x1b0 net/socket.c:594
>> sock_close+0x16/0x20 net/socket.c:1149
>> __fput+0x34d/0x890 fs/file_table.c:209
>> ____fput+0x15/0x20 fs/file_table.c:243
>> task_work_run+0x1e4/0x290 kernel/task_work.c:113
>> exit_task_work include/linux/task_work.h:22 [inline]
>> do_exit+0x1aee/0x2730 kernel/exit.c:865
>> do_group_exit+0x16f/0x430 kernel/exit.c:968
>> get_signal+0x886/0x1960 kernel/signal.c:2469
>> do_signal+0x98/0x2040 arch/x86/kernel/signal.c:810
>> exit_to_usermode_loop+0x28a/0x310 arch/x86/entry/common.c:162
>> prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
>> syscall_return_slowpath arch/x86/entry/common.c:265 [inline]
>> do_syscall_64+0x6ac/0x800 arch/x86/entry/common.c:290
>> entry_SYSCALL_64_after_hwframe+0x49/0xbe
>> RIP: 0033:0x455a09
>> RSP: 002b:00007f9890c42ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
>> RAX: fffffffffffffe00 RBX: 000000000072bec8 RCX: 0000000000455a09
>> RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000072bec8
>> RBP: 000000000072bec8 R08: 0000000000000000 R09: 000000000072bea0
>> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
>> R13: 00007ffcb48ac3ff R14: 00007f9890c439c0 R15: 0000000000000000
>> Code: ff 48 c1 e9 03 80 3c 19 00 0f 85 a9 05 00 00 49 8b 4f 18 48 8b 85 98 fe ff ff 48 89 ce c6 00 00 48 c1 ee 03 48 89 95 d8 fe ff ff <80> 3c 1e 00 0f 85 c6 05 00 00 48 8b 85 98 fe ff ff 48 85 d2 48
>> RIP: __hlist_del include/linux/list.h:649 [inline] RSP: ffff8801a8f8ef70
>> RIP: hlist_del_rcu include/linux/rculist.h:427 [inline] RSP: ffff8801a8f8ef70
>> RIP: bpf_tcp_close+0x7d2/0xf80 kernel/bpf/sockmap.c:271 RSP: ffff8801a8f8ef70
>> ---[ end trace e81227e93c7e7b75 ]---
>>
>>
>> ---
>> 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 [email protected].
>>
>> syzbot will keep track of this bug report. See:
>> https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot.
>
> --
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> For more options, visit https://groups.google.com/d/optout.
On 06/07/2018 09:58 AM, Dmitry Vyukov wrote:
> On Mon, May 28, 2018 at 12:15 AM, Daniel Borkmann <[email protected]> wrote:
>> [ +John ]
>>
>> On 05/26/2018 11:13 AM, syzbot wrote:
>>> Hello,
>>>
>>> syzbot found the following crash on:
>>>
>>> HEAD commit: fd0bfa8d6e04 Merge branch 'bpf-af-xdp-cleanups'
>>> git tree: bpf-next
>>> console output: https://syzkaller.appspot.com/x/log.txt?x=11da9427800000
>>> kernel config: https://syzkaller.appspot.com/x/.config?x=b632d8e2c2ab2c1
>>> dashboard link: https://syzkaller.appspot.com/bug?extid=0ce137753c78f7b6acc1
>>> 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: [email protected]
>>
>> Should be fixed by: https://patchwork.ozlabs.org/patch/920695/
>
> #syz fix: bpf: sockhash fix race with bpf_tcp_close and map delete
>
Hi, actually that patch was dropped because it needed an update. I
should have a new patch today/tomorrow though and will add the
correct fix tag then.
Thanks,
John
syzbot has found a reproducer for the following crash on:
HEAD commit: 6fcf9b1d4d6c r8169: fix runtime suspend
git tree: bpf-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1600b10c400000
kernel config: https://syzkaller.appspot.com/x/.config?x=d264f2b04177ca7c
dashboard link: https://syzkaller.appspot.com/bug?extid=0ce137753c78f7b6acc1
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=15ba0a1c400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=100c8170400000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: [email protected]
IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready
8021q: adding VLAN 0 to HW filter on device team0
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
CPU: 1 PID: 4705 Comm: syz-executor133 Not tainted 4.18.0-rc3+ #47
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:bpf_tcp_close+0x215/0x1050 kernel/bpf/sockmap.c:327
Code:
------------[ cut here ]------------
Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected
to SLAB object 'TCPv6' (offset 704, size 64)!
WARNING: CPU: 1 PID: 4705 at mm/usercopy.c:81 usercopy_warn+0xf5/0x120
mm/usercopy.c:76
Kernel panic - not syncing: panic_on_warn set ...
Dumping ftrace buffer:
(ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..