Hi,
I hit a reproducible BUG() when scrubbing a btrfs fs on top of
a dm-crypt device with no_read_workqueue and no_write_workqueue
flags enabled.
Steps to reproduce:
1) cryptsetup create -c aes -d /dev/urandom test /dev/vdb1
2) dmsetup table test --showkeys | sed 's/$/ 2 no_read_workqueue
no_wr
On Wed, Dec 23, 2020 at 04:37:34PM +0100, Maciej S. Szmigiero wrote:
>
> It looks like to me that the skcipher API might not be safe to
> call from a softirq context, after all.
skcipher is safe to use in a softirq. The problem is only in
dm-crypt where it tries to allocate memory with GFP_NOIO.
On Wed, Dec 23, 2020 at 3:37 PM Maciej S. Szmigiero
wrote:
>
> On 14.12.2020 19:11, Maciej S. Szmigiero wrote:
> > Hi,
> >
> > I hit a reproducible BUG() when scrubbing a btrfs fs on top of
> > a dm-crypt device with no_read_workqueue and no_write_workqueue
> > flags enabled.
>
> Still happens on
On Wed, Dec 23, 2020 at 9:20 PM Maciej S. Szmigiero
wrote:
>
> On 23.12.2020 22:09, Ignat Korchagin wrote:
> (..)
> > I've been looking into this for the last couple of days because of
> > other reports [1].
> > Just finished testing a possible solution. Will submit soon.
>
> Thanks for looking in
On Wed, Dec 23, 2020 at 8:57 PM Herbert Xu wrote:
>
> On Wed, Dec 23, 2020 at 04:37:34PM +0100, Maciej S. Szmigiero wrote:
> >
> > It looks like to me that the skcipher API might not be safe to
> > call from a softirq context, after all.
>
> skcipher is safe to use in a softirq. The problem is on
On 23.12.2020 22:09, Ignat Korchagin wrote:
(..)
I've been looking into this for the last couple of days because of
other reports [1].
Just finished testing a possible solution. Will submit soon.
Thanks for looking into it.
By the way, on a bare metal I am actually hitting a different problem
On 14.12.2020 19:11, Maciej S. Szmigiero wrote:
Hi,
I hit a reproducible BUG() when scrubbing a btrfs fs on top of
a dm-crypt device with no_read_workqueue and no_write_workqueue
flags enabled.
Still happens on the current torvalds/master.
Due to this bug it is not possible to use btrfs on to
On 24.12.2020 19:46, Ignat Korchagin wrote:
On Wed, Dec 23, 2020 at 8:57 PM Herbert Xu wrote:
On Wed, Dec 23, 2020 at 04:37:34PM +0100, Maciej S. Szmigiero wrote:
It looks like to me that the skcipher API might not be safe to
call from a softirq context, after all.
skcipher is safe to use
