On Tue, Sep 01, 2020 at 09:10:05AM +0800, Ming Lei wrote:
> On Tue, Sep 1, 2020 at 8:53 AM Qian Cai wrote:
> >
> > On Fri, Aug 07, 2020 at 09:34:08PM +0900, Tetsuo Handa wrote:
> > > On 2020/08/07 21:27, Al Viro wrote:
> > > > On Fri, Aug 07, 2020 at 07:35:08PM +0900, Tetsuo Handa wrote:
> > > >>
On Mon, Aug 31, 2020 at 11:32:28PM -0400, Qian Cai wrote:
> I used a new debug patch but not sure how to capture without
> printk_ratelimited() because the call sites are large,
if (!strcmp(current->comm, "bugger"))
printk(KERN_ERR
and call the binary you are running
On Tue, Sep 01, 2020 at 02:09:28AM +0100, Al Viro wrote:
> On Mon, Aug 31, 2020 at 08:51:32PM -0400, Qian Cai wrote:
> > On Fri, Aug 07, 2020 at 09:34:08PM +0900, Tetsuo Handa wrote:
> > > On 2020/08/07 21:27, Al Viro wrote:
> > > > On Fri, Aug 07, 2020 at 07:35:08PM +0900, Tetsuo Handa wrote:
> >
On Tue, Sep 01, 2020 at 02:09:28AM +0100, Al Viro wrote:
> On Mon, Aug 31, 2020 at 08:51:32PM -0400, Qian Cai wrote:
> > On Fri, Aug 07, 2020 at 09:34:08PM +0900, Tetsuo Handa wrote:
> > > On 2020/08/07 21:27, Al Viro wrote:
> > > > On Fri, Aug 07, 2020 at 07:35:08PM +0900, Tetsuo Handa wrote:
> >
On Tue, Sep 1, 2020 at 8:53 AM Qian Cai wrote:
>
> On Fri, Aug 07, 2020 at 09:34:08PM +0900, Tetsuo Handa wrote:
> > On 2020/08/07 21:27, Al Viro wrote:
> > > On Fri, Aug 07, 2020 at 07:35:08PM +0900, Tetsuo Handa wrote:
> > >> syzbot is reporting hung task at pipe_release() [1], for
On Mon, Aug 31, 2020 at 08:51:32PM -0400, Qian Cai wrote:
> On Fri, Aug 07, 2020 at 09:34:08PM +0900, Tetsuo Handa wrote:
> > On 2020/08/07 21:27, Al Viro wrote:
> > > On Fri, Aug 07, 2020 at 07:35:08PM +0900, Tetsuo Handa wrote:
> > >> syzbot is reporting hung task at pipe_release() [1], for
On Fri, Aug 07, 2020 at 09:34:08PM +0900, Tetsuo Handa wrote:
> On 2020/08/07 21:27, Al Viro wrote:
> > On Fri, Aug 07, 2020 at 07:35:08PM +0900, Tetsuo Handa wrote:
> >> syzbot is reporting hung task at pipe_release() [1], for for_each_bvec()
> >> from
> >> iterate_bvec() from
On Sun, Aug 09, 2020 at 10:31:23AM +0800, Ming Lei wrote:
> On Fri, Aug 07, 2020 at 03:11:48PM +0100, Matthew Wilcox wrote:
> > On Fri, Aug 07, 2020 at 09:41:14PM +0800, Ming Lei wrote:
> > > On Fri, Aug 07, 2020 at 01:38:54PM +0100, Al Viro wrote:
> > > > FWIW, my preference would be to have
On Fri, Aug 07, 2020 at 03:11:48PM +0100, Matthew Wilcox wrote:
> On Fri, Aug 07, 2020 at 09:41:14PM +0800, Ming Lei wrote:
> > On Fri, Aug 07, 2020 at 01:38:54PM +0100, Al Viro wrote:
> > > FWIW, my preference would be to have for_each_bvec() advance past
> > > zero-length
> > > segments; I'll
On 2020/08/07 23:11, Matthew Wilcox wrote:
> (I find the whole bvec handling a mess of confusing macros and would
> welcome more of it being inline functions, in general).
Indeed. Inlined functions will be more useful than macros when syzbot
calculates the location of the source code from address
On 2020/08/07 22:41, Ming Lei wrote:
>> FWIW, my preference would be to have for_each_bvec() advance past zero-length
>> segments; I'll need to go through its uses elsewhere in the tree first,
>> though
>> (after I grab some sleep),
>
> Usually block layer doesn't allow/support zero bvec,
On Fri, Aug 07, 2020 at 09:41:14PM +0800, Ming Lei wrote:
> On Fri, Aug 07, 2020 at 01:38:54PM +0100, Al Viro wrote:
> > FWIW, my preference would be to have for_each_bvec() advance past
> > zero-length
> > segments; I'll need to go through its uses elsewhere in the tree first,
> > though
> >
On Fri, Aug 07, 2020 at 01:38:54PM +0100, Al Viro wrote:
> On Fri, Aug 07, 2020 at 01:27:27PM +0100, Al Viro wrote:
> > On Fri, Aug 07, 2020 at 07:35:08PM +0900, Tetsuo Handa wrote:
> > > syzbot is reporting hung task at pipe_release() [1], for for_each_bvec()
> > > from
> > > iterate_bvec() from
On Fri, Aug 07, 2020 at 01:27:27PM +0100, Al Viro wrote:
> On Fri, Aug 07, 2020 at 07:35:08PM +0900, Tetsuo Handa wrote:
> > syzbot is reporting hung task at pipe_release() [1], for for_each_bvec()
> > from
> > iterate_bvec() from iterate_all_kinds() from iov_iter_alignment() from
> >
On 2020/08/07 21:27, Al Viro wrote:
> On Fri, Aug 07, 2020 at 07:35:08PM +0900, Tetsuo Handa wrote:
>> syzbot is reporting hung task at pipe_release() [1], for for_each_bvec() from
>> iterate_bvec() from iterate_all_kinds() from iov_iter_alignment() from
>> ext4_unaligned_io() from
On Fri, Aug 07, 2020 at 07:35:08PM +0900, Tetsuo Handa wrote:
> syzbot is reporting hung task at pipe_release() [1], for for_each_bvec() from
> iterate_bvec() from iterate_all_kinds() from iov_iter_alignment() from
> ext4_unaligned_io() from ext4_dio_write_iter() from ext4_file_write_iter()
>
syzbot is reporting hung task at pipe_release() [1], for for_each_bvec() from
iterate_bvec() from iterate_all_kinds() from iov_iter_alignment() from
ext4_unaligned_io() from ext4_dio_write_iter() from ext4_file_write_iter() from
call_write_iter() from do_iter_readv_writev() from do_iter_write()
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