Re: WARNING in refcount_sub_and_test (2)

2018-04-01 Thread Dmitry Vyukov
On Fri, Mar 30, 2018 at 12:01 AM, syzbot wrote: > Hello, > > syzbot hit the following crash on bpf-next commit > 22527437e0a0c96ee3153e9d0382942b0fd4f9dd (Thu Mar 29 02:36:15 2018 +) > Merge branch 'nfp-bpf-updates' > syzbot dashboard link: > https://syzkaller.appspot.com/bug?extid=c7b0dde061c

WARNING in refcount_sub_and_test (2)

2018-03-29 Thread syzbot
Hello, syzbot hit the following crash on bpf-next commit 22527437e0a0c96ee3153e9d0382942b0fd4f9dd (Thu Mar 29 02:36:15 2018 +) Merge branch 'nfp-bpf-updates' syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=c7b0dde061c523bc4b0f C reproducer: https://syzkaller.appspot.com/x/r

Re: WARNING in refcount_sub_and_test

2017-10-27 Thread Dmitry Vyukov
On Fri, Oct 27, 2017 at 11:36 AM, Eric Dumazet wrote: > On Fri, 2017-10-27 at 08:09 +0200, Dmitry Vyukov wrote: > >> Yes, I've noticed this one. It seems to happen on a first incoming >> network connection (ssh/scp). I have not seen it before. > > https://git.kernel.org/pub/scm/linux/kernel/git/ti

Re: WARNING in refcount_sub_and_test

2017-10-27 Thread Eric Dumazet
On Fri, 2017-10-27 at 08:09 +0200, Dmitry Vyukov wrote: > Yes, I've noticed this one. It seems to happen on a first incoming > network connection (ssh/scp). I have not seen it before. https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=timers/core&id=52f737c2da40259ac9962170ce60

Re: WARNING in refcount_sub_and_test

2017-10-26 Thread Dmitry Vyukov
On Thu, Oct 26, 2017 at 6:56 PM, Xin Long wrote: > Hi all, > > I am failed to reproduce it on target kernel with the reproducer file > or replaying the target syzkaller description log file, do I made > something wrong or there exists more subjects then the line in > repro.

Re: WARNING in refcount_sub_and_test

2017-10-26 Thread Dmitry Vyukov
On Fri, Oct 27, 2017 at 4:30 AM, ChunYu Wang wrote: > Maybe I have just made some mistakes on understanding the reproduction > methods, will try it again. This is reproducible with the C program. If bot posts it, it was able to reproduce the bug with the compiled C program. If it was not able to

Re: WARNING in refcount_sub_and_test

2017-10-26 Thread ChunYu Wang
Maybe I have just made some mistakes on understanding the reproduction methods, will try it again. Thanks, - ChunYu On Thu, Oct 26, 2017 at 10:49 PM, Dmitry Vyukov wrote: > On Thu, Oct 26, 2017 at 10:53 AM, ChunYu Wang wrote: >> Hi all, >> >> I am failed to reproduce it on target kernel with th

Re: WARNING in refcount_sub_and_test

2017-10-26 Thread Xin Long
On Fri, Oct 27, 2017 at 12:56 AM, Xin Long wrote: > On Fri, Oct 27, 2017 at 12:13 AM, Dmitry Vyukov wrote: >> On Thu, Oct 26, 2017 at 5:49 PM, Xin Long wrote: >>> On Thu, Oct 26, 2017 at 10:49 PM, Dmitry Vyukov wrote: On Thu, Oct 26, 2017 at 10:53 AM, ChunYu Wang wrote: > Hi all,

Re: WARNING in refcount_sub_and_test

2017-10-26 Thread Xin Long
On Fri, Oct 27, 2017 at 12:13 AM, Dmitry Vyukov wrote: > On Thu, Oct 26, 2017 at 5:49 PM, Xin Long wrote: >> On Thu, Oct 26, 2017 at 10:49 PM, Dmitry Vyukov wrote: >>> On Thu, Oct 26, 2017 at 10:53 AM, ChunYu Wang wrote: Hi all, I am failed to reproduce it on target kernel with t

Re: WARNING in refcount_sub_and_test

2017-10-26 Thread Dmitry Vyukov
On Thu, Oct 26, 2017 at 5:49 PM, Xin Long wrote: > On Thu, Oct 26, 2017 at 10:49 PM, Dmitry Vyukov wrote: >> On Thu, Oct 26, 2017 at 10:53 AM, ChunYu Wang wrote: >>> Hi all, >>> >>> I am failed to reproduce it on target kernel with the reproducer file >>> or replaying the target syzkaller descri

Re: WARNING in refcount_sub_and_test

2017-10-26 Thread Xin Long
On Thu, Oct 26, 2017 at 10:49 PM, Dmitry Vyukov wrote: > On Thu, Oct 26, 2017 at 10:53 AM, ChunYu Wang wrote: >> Hi all, >> >> I am failed to reproduce it on target kernel with the reproducer file >> or replaying the target syzkaller description log file, do I made >> something wrong or there exi

Re: WARNING in refcount_sub_and_test

2017-10-26 Thread Dmitry Vyukov
On Thu, Oct 26, 2017 at 10:53 AM, ChunYu Wang wrote: > Hi all, > > I am failed to reproduce it on target kernel with the reproducer file > or replaying the target syzkaller description log file, do I made > something wrong or there exists more subjects then the line in > repro.txt: > > #{Threaded:

Re: WARNING in refcount_sub_and_test

2017-10-26 Thread ChunYu Wang
Hi all, I am failed to reproduce it on target kernel with the reproducer file or replaying the target syzkaller description log file, do I made something wrong or there exists more subjects then the line in repro.txt: #{Threaded:true Collide:true Repeat:false Procs:1 Sandbox:namespace Fault:false