Re: v4.16-rc2: virtio-block + ext4 lockdep splats / sleeping from invalid context

2018-02-27 Thread Mark Rutland
On Mon, Feb 26, 2018 at 01:44:55PM +0100, Jan Kara wrote: > On Mon 26-02-18 11:38:19, Mark Rutland wrote: > > That seems to be it! > > > > With the below patch applied, I can't trigger the bug after ~10 minutes, > > whereas prior to the patch I can trigger it in ~10 seconds. I'll leave > > that

Re: v4.16-rc2: virtio-block + ext4 lockdep splats / sleeping from invalid context

2018-02-26 Thread Jan Kara
On Mon 26-02-18 11:38:19, Mark Rutland wrote: > On Mon, Feb 26, 2018 at 11:52:56AM +0100, Jan Kara wrote: > > On Fri 23-02-18 15:47:36, Mark Rutland wrote: > > > Hi all, > > > > > > While fuzzing arm64/v4.16-rc2 with syzkaller, I simultaneously hit a > > > number of splats in the block layer: > >

Re: v4.16-rc2: virtio-block + ext4 lockdep splats / sleeping from invalid context

2018-02-26 Thread Mark Rutland
On Mon, Feb 26, 2018 at 11:52:56AM +0100, Jan Kara wrote: > On Fri 23-02-18 15:47:36, Mark Rutland wrote: > > Hi all, > > > > While fuzzing arm64/v4.16-rc2 with syzkaller, I simultaneously hit a > > number of splats in the block layer: > > > > * inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-R}

Re: v4.16-rc2: virtio-block + ext4 lockdep splats / sleeping from invalid context

2018-02-26 Thread Jan Kara
On Fri 23-02-18 15:47:36, Mark Rutland wrote: > Hi all, > > While fuzzing arm64/v4.16-rc2 with syzkaller, I simultaneously hit a > number of splats in the block layer: > > * inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-R} usage in > jbd2_trans_will_send_data_barrier > > * BUG: sleeping function

v4.16-rc2: virtio-block + ext4 lockdep splats / sleeping from invalid context

2018-02-23 Thread Mark Rutland
Hi all, While fuzzing arm64/v4.16-rc2 with syzkaller, I simultaneously hit a number of splats in the block layer: * inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-R} usage in jbd2_trans_will_send_data_barrier * BUG: sleeping function called from invalid context at mm/mempool.c:320 * WARNING: