On Wed, 16 Mar 2022, Greg KH wrote: > On Wed, Mar 16, 2022 at 04:18:16PM +0000, Lee Jones wrote: > > Stable Team, > > > > > Revert of revert of "io_uring: wait potential ->release() on resurrect", > > > which adds a helper for resurrect not racing completion reinit, as was > > > removed because of a strange bug with no clear root or link to the > > > patch. > > > > > > Was improved, instead of rcu_synchronize(), just wait_for_completion() > > > because we're at 0 refs and it will happen very shortly. Specifically > > > use non-interruptible version to ignore all pending signals that may > > > have ended prior interruptible wait. > > > > > > This reverts commit cb5e1b81304e089ee3ca948db4d29f71902eb575. > > > > > > Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx> > > > --- > > > fs/io_uring.c | 18 ++++++++++++++---- > > > 1 file changed, 14 insertions(+), 4 deletions(-) > > > > Please back-port this as far as it will apply. > > > > Definitely through v5.10.y. > > > > It solves a critical bug. > > > > Subject: "io_uring: return back safer resurrect" > > > > Upstream commit:: f70865db5ff35f5ed0c7e9ef63e7cca3d4947f04 > > It only applies to 5.10.y. It showed up in 5.12, so if you want it > further back than 5.10.y, can you provide a working backport? Works for me, thanks. -- Lee Jones [李琼斯] Principal Technical Lead - Developer Services Linaro.org │ Open source software for Arm SoCs Follow Linaro: Facebook | Twitter | Blog
