Re: INFO: rcu detected stall in sys_sendfile64 (2)

2019-03-13 Thread Dmitry Vyukov
On Tue, Mar 12, 2019 at 5:08 AM Al Viro wrote: > > On Mon, Mar 11, 2019 at 08:59:00PM -0700, syzbot wrote: > > syzbot has bisected this bug to: > > > > commit 34e07e42c55aeaa78e93b057a6664e2ecde3fadb > > Author: Chris Wilson > > Date: Thu Feb 8 10:54:48 2018 + > > > > drm/i915: Add miss

Re: INFO: rcu detected stall in sys_sendfile64 (2)

2019-03-13 Thread Tetsuo Handa
(Moving most recipients to bcc: in order to avoid flooding.) On 2019/03/12 13:08, Al Viro wrote: > Umm... Might be a good idea to add some plausibility filters - it is, > in theory, possible that adding a line in a comment changes behaviour > (without compiler bugs, even - playing with __LINE__ i

Re: INFO: rcu detected stall in sys_sendfile64 (2)

2019-03-12 Thread syzbot
syzbot has bisected this bug to: commit 34e07e42c55aeaa78e93b057a6664e2ecde3fadb Author: Chris Wilson Date: Thu Feb 8 10:54:48 2018 + drm/i915: Add missing kerneldoc for 'ent' in i915_driver_init_early bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1322028320 start

Re: INFO: rcu detected stall in sys_sendfile64 (2)

2019-03-12 Thread Al Viro
On Mon, Mar 11, 2019 at 08:59:00PM -0700, syzbot wrote: > syzbot has bisected this bug to: > > commit 34e07e42c55aeaa78e93b057a6664e2ecde3fadb > Author: Chris Wilson > Date: Thu Feb 8 10:54:48 2018 + > > drm/i915: Add missing kerneldoc for 'ent' in i915_driver_init_early > > bisection

Re: INFO: rcu detected stall in sys_sendfile64 (2)

2019-03-12 Thread Jani Nikula
On Tue, 12 Mar 2019, Al Viro wrote: > On Mon, Mar 11, 2019 at 08:59:00PM -0700, syzbot wrote: >> syzbot has bisected this bug to: >> >> commit 34e07e42c55aeaa78e93b057a6664e2ecde3fadb >> Author: Chris Wilson >> Date: Thu Feb 8 10:54:48 2018 + >> >> drm/i915: Add missing kerneldoc for