Re: possible deadlock in ovl_write_iter

2018-11-27 Thread Amir Goldstein
> > This looks like a false positive because lockdep is not aware of > > s_stack_depth of the file (fs) associated with the pipe. > > There must be some annotation to tell lockdep about this. > It's a long story that can be summed up as "not simple": https://lkml.org/lkml/2017/9/21/63 Overlayfs

Re: possible deadlock in ovl_write_iter

2018-11-27 Thread Amir Goldstein
> > This looks like a false positive because lockdep is not aware of > > s_stack_depth of the file (fs) associated with the pipe. > > There must be some annotation to tell lockdep about this. > It's a long story that can be summed up as "not simple": https://lkml.org/lkml/2017/9/21/63 Overlayfs

Re: possible deadlock in ovl_write_iter

2018-11-27 Thread Dmitry Vyukov
On Tue, Nov 27, 2018 at 4:07 PM, Amir Goldstein wrote: > On Tue, Nov 27, 2018 at 9:06 AM syzbot > wrote: >> >> syzbot has found a reproducer for the following crash on: >> >> HEAD commit:6f8b52ba442c Merge tag 'hwmon-for-v4.20-rc5' of git://git... >> git tree: upstream >> console

Re: possible deadlock in ovl_write_iter

2018-11-27 Thread Dmitry Vyukov
On Tue, Nov 27, 2018 at 4:07 PM, Amir Goldstein wrote: > On Tue, Nov 27, 2018 at 9:06 AM syzbot > wrote: >> >> syzbot has found a reproducer for the following crash on: >> >> HEAD commit:6f8b52ba442c Merge tag 'hwmon-for-v4.20-rc5' of git://git... >> git tree: upstream >> console

Re: possible deadlock in ovl_write_iter

2018-11-27 Thread Amir Goldstein
On Tue, Nov 27, 2018 at 9:06 AM syzbot wrote: > > syzbot has found a reproducer for the following crash on: > > HEAD commit:6f8b52ba442c Merge tag 'hwmon-for-v4.20-rc5' of git://git... > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=120f390540 >

Re: possible deadlock in ovl_write_iter

2018-11-27 Thread Amir Goldstein
On Tue, Nov 27, 2018 at 9:06 AM syzbot wrote: > > syzbot has found a reproducer for the following crash on: > > HEAD commit:6f8b52ba442c Merge tag 'hwmon-for-v4.20-rc5' of git://git... > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=120f390540 >

Re: possible deadlock in ovl_write_iter

2018-11-27 Thread Dmitry Vyukov
On Tue, Nov 27, 2018 at 8:44 AM, Amir Goldstein wrote: > On Tue, Nov 27, 2018 at 9:06 AM syzbot > wrote: >> >> syzbot has found a reproducer for the following crash on: >> >> HEAD commit:6f8b52ba442c Merge tag 'hwmon-for-v4.20-rc5' of git://git... >> git tree: upstream >> console

Re: possible deadlock in ovl_write_iter

2018-11-27 Thread Dmitry Vyukov
On Tue, Nov 27, 2018 at 8:44 AM, Amir Goldstein wrote: > On Tue, Nov 27, 2018 at 9:06 AM syzbot > wrote: >> >> syzbot has found a reproducer for the following crash on: >> >> HEAD commit:6f8b52ba442c Merge tag 'hwmon-for-v4.20-rc5' of git://git... >> git tree: upstream >> console

Re: possible deadlock in ovl_write_iter

2018-11-26 Thread Amir Goldstein
On Tue, Nov 27, 2018 at 9:06 AM syzbot wrote: > > syzbot has found a reproducer for the following crash on: > > HEAD commit:6f8b52ba442c Merge tag 'hwmon-for-v4.20-rc5' of git://git... > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=120f390540 >

Re: possible deadlock in ovl_write_iter

2018-11-26 Thread Amir Goldstein
On Tue, Nov 27, 2018 at 9:06 AM syzbot wrote: > > syzbot has found a reproducer for the following crash on: > > HEAD commit:6f8b52ba442c Merge tag 'hwmon-for-v4.20-rc5' of git://git... > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=120f390540 >

Re: possible deadlock in ovl_write_iter

2018-11-26 Thread syzbot
syzbot has found a reproducer for the following crash on: HEAD commit:6f8b52ba442c Merge tag 'hwmon-for-v4.20-rc5' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=120f390540 kernel config:

Re: possible deadlock in ovl_write_iter

2018-11-26 Thread syzbot
syzbot has found a reproducer for the following crash on: HEAD commit:6f8b52ba442c Merge tag 'hwmon-for-v4.20-rc5' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=120f390540 kernel config:

Re: possible deadlock in ovl_write_iter

2018-09-26 Thread Amir Goldstein
[CC: fsdevel] On Thu, Sep 27, 2018 at 6:48 AM Amir Goldstein wrote: > > On Wed, Sep 26, 2018 at 11:44 PM syzbot > wrote: > > > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit:a38523185b40 erge tag 'libnvdimm-fixes-4.19-rc6' of git://.. > > git tree: upstream

Re: possible deadlock in ovl_write_iter

2018-09-26 Thread Amir Goldstein
[CC: fsdevel] On Thu, Sep 27, 2018 at 6:48 AM Amir Goldstein wrote: > > On Wed, Sep 26, 2018 at 11:44 PM syzbot > wrote: > > > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit:a38523185b40 erge tag 'libnvdimm-fixes-4.19-rc6' of git://.. > > git tree: upstream

Re: possible deadlock in ovl_write_iter

2018-09-26 Thread Amir Goldstein
On Wed, Sep 26, 2018 at 11:44 PM syzbot wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit:a38523185b40 erge tag 'libnvdimm-fixes-4.19-rc6' of git://.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=178f63fa40 > kernel

Re: possible deadlock in ovl_write_iter

2018-09-26 Thread Amir Goldstein
On Wed, Sep 26, 2018 at 11:44 PM syzbot wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit:a38523185b40 erge tag 'libnvdimm-fixes-4.19-rc6' of git://.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=178f63fa40 > kernel

possible deadlock in ovl_write_iter

2018-09-26 Thread syzbot
Hello, syzbot found the following crash on: HEAD commit:a38523185b40 erge tag 'libnvdimm-fixes-4.19-rc6' of git://.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=178f63fa40 kernel config: https://syzkaller.appspot.com/x/.config?x=dfb440e26f0a6f6f

possible deadlock in ovl_write_iter

2018-09-26 Thread syzbot
Hello, syzbot found the following crash on: HEAD commit:a38523185b40 erge tag 'libnvdimm-fixes-4.19-rc6' of git://.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=178f63fa40 kernel config: https://syzkaller.appspot.com/x/.config?x=dfb440e26f0a6f6f