2019-05-24 05:30:17

by syzbot

[permalink] [raw]
Subject: bpf build error

Hello,

syzbot found the following crash on:

HEAD commit: e6f6cd0d bpf: sockmap, fix use after free from sleep in ps..
git tree: bpf
console output: https://syzkaller.appspot.com/x/log.txt?x=16f116e4a00000
kernel config: https://syzkaller.appspot.com/x/.config?x=fc045131472947d7
dashboard link: https://syzkaller.appspot.com/bug?extid=cbe357153903f8d9409a
compiler: gcc (GCC) 9.0.0 20181231 (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]

net/core/skbuff.c:2340:6: error: ‘struct msghdr’ has no member named ‘flags’

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2019-05-24 08:10:17

by Daniel Borkmann

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Subject: Re: bpf build error

On 05/24/2019 07:28 AM, syzbot wrote:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit:    e6f6cd0d bpf: sockmap, fix use after free from sleep in ps..
> git tree:       bpf
> console output: https://syzkaller.appspot.com/x/log.txt?x=16f116e4a00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=fc045131472947d7
> dashboard link: https://syzkaller.appspot.com/bug?extid=cbe357153903f8d9409a
> compiler:       gcc (GCC) 9.0.0 20181231 (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]
>
> net/core/skbuff.c:2340:6: error: ‘struct msghdr’ has no member named ‘flags’

Disregard, tossed from bpf tree.

2019-05-24 09:26:05

by Dmitry Vyukov

[permalink] [raw]
Subject: Re: bpf build error

On Fri, May 24, 2019 at 10:08 AM Daniel Borkmann <[email protected]> wrote:
>
> On 05/24/2019 07:28 AM, syzbot wrote:
> > Hello,
> >
> > syzbot found the following crash on:
> >
> > HEAD commit: e6f6cd0d bpf: sockmap, fix use after free from sleep in ps..
> > git tree: bpf
> > console output: https://syzkaller.appspot.com/x/log.txt?x=16f116e4a00000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=fc045131472947d7
> > dashboard link: https://syzkaller.appspot.com/bug?extid=cbe357153903f8d9409a
> > compiler: gcc (GCC) 9.0.0 20181231 (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]
> >
> > net/core/skbuff.c:2340:6: error: ‘struct msghdr’ has no member named ‘flags’
>
> Disregard, tossed from bpf tree.

Let's close it then

#syz invalid

or it will hang open on the dashboard distracting people looking for
open bugs and new bpf build breakages won't be reported.