Re: KMSAN: uninit-value in rcu_accelerate_cbs / KMSAN: uninit-value in rcu_process_callbacks

2018-11-15 Thread Alexander Potapenko
On Thu, Nov 15, 2018 at 5:05 AM Kyungtae Kim wrote: > > Thank you for all your comments. > > Thanks, > Kyungtae Kim > On Wed, Nov 14, 2018 at 11:05 AM Paul E. McKenney > wrote: > > > > On Wed, Nov 14, 2018 at 04:31:11PM +0100, Alexander Potapenko wrote: > > > On Wed, Nov 14, 2018 at 4:09 PM

Re: KMSAN: uninit-value in rcu_accelerate_cbs / KMSAN: uninit-value in rcu_process_callbacks

2018-11-15 Thread Alexander Potapenko
On Thu, Nov 15, 2018 at 5:05 AM Kyungtae Kim wrote: > > Thank you for all your comments. > > Thanks, > Kyungtae Kim > On Wed, Nov 14, 2018 at 11:05 AM Paul E. McKenney > wrote: > > > > On Wed, Nov 14, 2018 at 04:31:11PM +0100, Alexander Potapenko wrote: > > > On Wed, Nov 14, 2018 at 4:09 PM

Re: KMSAN: uninit-value in rcu_accelerate_cbs / KMSAN: uninit-value in rcu_process_callbacks

2018-11-14 Thread Kyungtae Kim
Thank you for all your comments. Thanks, Kyungtae Kim On Wed, Nov 14, 2018 at 11:05 AM Paul E. McKenney wrote: > > On Wed, Nov 14, 2018 at 04:31:11PM +0100, Alexander Potapenko wrote: > > On Wed, Nov 14, 2018 at 4:09 PM Paul E. McKenney > > wrote: > > > > > > On Wed, Nov 14, 2018 at 04:03:33AM

Re: KMSAN: uninit-value in rcu_accelerate_cbs / KMSAN: uninit-value in rcu_process_callbacks

2018-11-14 Thread Kyungtae Kim
Thank you for all your comments. Thanks, Kyungtae Kim On Wed, Nov 14, 2018 at 11:05 AM Paul E. McKenney wrote: > > On Wed, Nov 14, 2018 at 04:31:11PM +0100, Alexander Potapenko wrote: > > On Wed, Nov 14, 2018 at 4:09 PM Paul E. McKenney > > wrote: > > > > > > On Wed, Nov 14, 2018 at 04:03:33AM

Re: KMSAN: uninit-value in rcu_accelerate_cbs / KMSAN: uninit-value in rcu_process_callbacks

2018-11-14 Thread Paul E. McKenney
On Wed, Nov 14, 2018 at 04:31:11PM +0100, Alexander Potapenko wrote: > On Wed, Nov 14, 2018 at 4:09 PM Paul E. McKenney > wrote: > > > > On Wed, Nov 14, 2018 at 04:03:33AM -0500, Kyungtae Kim wrote: > > > We report two crashes in v4.19-rc8 (4.20-rc1 as well, I guess): > > > (Unfortunately, there

Re: KMSAN: uninit-value in rcu_accelerate_cbs / KMSAN: uninit-value in rcu_process_callbacks

2018-11-14 Thread Paul E. McKenney
On Wed, Nov 14, 2018 at 04:31:11PM +0100, Alexander Potapenko wrote: > On Wed, Nov 14, 2018 at 4:09 PM Paul E. McKenney > wrote: > > > > On Wed, Nov 14, 2018 at 04:03:33AM -0500, Kyungtae Kim wrote: > > > We report two crashes in v4.19-rc8 (4.20-rc1 as well, I guess): > > > (Unfortunately, there

Re: KMSAN: uninit-value in rcu_accelerate_cbs / KMSAN: uninit-value in rcu_process_callbacks

2018-11-14 Thread Alexander Potapenko
On Wed, Nov 14, 2018 at 4:09 PM Paul E. McKenney wrote: > > On Wed, Nov 14, 2018 at 04:03:33AM -0500, Kyungtae Kim wrote: > > We report two crashes in v4.19-rc8 (4.20-rc1 as well, I guess): > > (Unfortunately, there is no repro for those.) > > > > The two crashes seem to share the same issue. > >

Re: KMSAN: uninit-value in rcu_accelerate_cbs / KMSAN: uninit-value in rcu_process_callbacks

2018-11-14 Thread Alexander Potapenko
On Wed, Nov 14, 2018 at 4:09 PM Paul E. McKenney wrote: > > On Wed, Nov 14, 2018 at 04:03:33AM -0500, Kyungtae Kim wrote: > > We report two crashes in v4.19-rc8 (4.20-rc1 as well, I guess): > > (Unfortunately, there is no repro for those.) > > > > The two crashes seem to share the same issue. > >

Re: KMSAN: uninit-value in rcu_accelerate_cbs / KMSAN: uninit-value in rcu_process_callbacks

2018-11-14 Thread Paul E. McKenney
On Wed, Nov 14, 2018 at 04:03:33AM -0500, Kyungtae Kim wrote: > We report two crashes in v4.19-rc8 (4.20-rc1 as well, I guess): > (Unfortunately, there is no repro for those.) > > The two crashes seem to share the same issue. > In both cases, (uninitialized) memory access violation occurs > when

Re: KMSAN: uninit-value in rcu_accelerate_cbs / KMSAN: uninit-value in rcu_process_callbacks

2018-11-14 Thread Paul E. McKenney
On Wed, Nov 14, 2018 at 04:03:33AM -0500, Kyungtae Kim wrote: > We report two crashes in v4.19-rc8 (4.20-rc1 as well, I guess): > (Unfortunately, there is no repro for those.) > > The two crashes seem to share the same issue. > In both cases, (uninitialized) memory access violation occurs > when

KMSAN: uninit-value in rcu_accelerate_cbs / KMSAN: uninit-value in rcu_process_callbacks

2018-11-14 Thread Kyungtae Kim
We report two crashes in v4.19-rc8 (4.20-rc1 as well, I guess): (Unfortunately, there is no repro for those.) The two crashes seem to share the same issue. In both cases, (uninitialized) memory access violation occurs when "rdp->cblist" is about to be accessed (kernel/rcu/tree.c:2838,1728). I

KMSAN: uninit-value in rcu_accelerate_cbs / KMSAN: uninit-value in rcu_process_callbacks

2018-11-14 Thread Kyungtae Kim
We report two crashes in v4.19-rc8 (4.20-rc1 as well, I guess): (Unfortunately, there is no repro for those.) The two crashes seem to share the same issue. In both cases, (uninitialized) memory access violation occurs when "rdp->cblist" is about to be accessed (kernel/rcu/tree.c:2838,1728). I