On Tue 14-07-20 10:32:20, Suren Baghdasaryan wrote:
[...]
> I'm not sure how we can annotate the fact that the inode_lock in
> generic_file_write_iter and in shmem_fallocate always operate on
> different inodes. Ideas?
I believe that the standard way is to use lockdep_set_class on your
backing ino
On Tue, 14 Jul 2020 10:32:20 -0700 Suren Baghdasaryan wrote:
> On Tue, Jul 14, 2020 at 9:41 AM Suren Baghdasaryan wrote:
> >
> > On Tue, Jul 14, 2020 at 8:47 AM Todd Kjos wrote:
> > >
> > > +Suren Baghdasaryan +Hridya Valsaraju who support the ashmem driver.
> >
> > Thanks for looping me in.
>
On Tue, Jul 14, 2020 at 8:47 AM Todd Kjos wrote:
>
> +Suren Baghdasaryan +Hridya Valsaraju who support the ashmem driver.
Thanks for looping me in.
>
>
> On Tue, Jul 14, 2020 at 7:18 AM Michal Hocko wrote:
> >
> > On Tue 14-07-20 22:08:59, Hillf Danton wrote:
> > >
> > > On Tue, 14 Jul 2020 10:
On Tue, 14 Jul 2020 10:26:29 +0200 Michal Hocko wrote:
> On Tue 14-07-20 13:32:05, Hillf Danton wrote:
> >
> > On Mon, 13 Jul 2020 20:41:11 -0700 Eric Biggers wrote:
> > > On Tue, Jul 14, 2020 at 11:32:52AM +0800, Hillf Danton wrote:
> > > >
> > > > Add FALLOC_FL_NOBLOCK and on the shmem side t
On Tue 14-07-20 22:08:59, Hillf Danton wrote:
>
> On Tue, 14 Jul 2020 10:26:29 +0200 Michal Hocko wrote:
> > On Tue 14-07-20 13:32:05, Hillf Danton wrote:
> > >
> > > On Mon, 13 Jul 2020 20:41:11 -0700 Eric Biggers wrote:
> > > > On Tue, Jul 14, 2020 at 11:32:52AM +0800, Hillf Danton wrote:
> > >
On Tue 14-07-20 13:32:05, Hillf Danton wrote:
>
> On Mon, 13 Jul 2020 20:41:11 -0700 Eric Biggers wrote:
> > On Tue, Jul 14, 2020 at 11:32:52AM +0800, Hillf Danton wrote:
> > >
> > > Add FALLOC_FL_NOBLOCK and on the shmem side try to lock inode upon the
> > > new flag. And the overall upside is t
On Mon, 13 Jul 2020 20:41:11 -0700 Eric Biggers wrote:
> On Tue, Jul 14, 2020 at 11:32:52AM +0800, Hillf Danton wrote:
> >
> > Add FALLOC_FL_NOBLOCK and on the shmem side try to lock inode upon the
> > new flag. And the overall upside is to keep the current gfp either in
> > the khugepaged conte
On Tue, Jul 14, 2020 at 11:32:52AM +0800, Hillf Danton wrote:
>
> Add FALLOC_FL_NOBLOCK and on the shmem side try to lock inode upon the
> new flag. And the overall upside is to keep the current gfp either in
> the khugepaged context or not.
>
> --- a/include/uapi/linux/falloc.h
> +++ b/include/u
Mon, 13 Jul 2020 17:32:19 -0700
> syzbot has found a reproducer for the following crash on:
>
> HEAD commit:11ba4688 Linux 5.8-rc5
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=13f1bf4710
> kernel config: https://syzkaller.appspot.com/x/.config?x
syzbot has found a reproducer for the following crash on:
HEAD commit:11ba4688 Linux 5.8-rc5
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=175391fb10
kernel config: https://syzkaller.appspot.com/x/.config?x=a160d1053fc89af5
dashboard link: https://syzk
syzbot has found a reproducer for the following crash on:
HEAD commit:11ba4688 Linux 5.8-rc5
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13f1bf4710
kernel config: https://syzkaller.appspot.com/x/.config?x=a160d1053fc89af5
dashboard link: https://syzk
ashmem is calling shmem_fallocate() during memory reclaim, which can deadlock on
inode_lock(). +Cc maintainers of drivers/staging/android/ashmem.c.
On Thu, Dec 26, 2019 at 01:25:09PM -0800, syzbot wrote:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit:46cf053e Linux 5.5-rc
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