On 17/04/19 14:30, Stefan Hajnoczi wrote: > On Wed, Apr 17, 2019 at 12:54 PM Paolo Bonzini <pbonz...@redhat.com> wrote: >> Linux places a limit of UIO_MAXIOV pages on SG_IO ioctls (and if the limit >> is exceeded, a confusing ENOMEM error is returned[1]). Prevent the guest >> from exceeding these limits, by capping the maximum transfer length to >> that value in the block limits VPD page. >> >> [1] Oh well, at least it was easier to follow the kernel source knowing >> it had to end as ENOMEM... >> >> Cc: qemu-sta...@nongnu.org >> Cc: qemu-block@nongnu.org >> Cc: Stefan Hajnoczi <stefa...@redhat.com> >> Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> >> --- >> hw/scsi/scsi-generic.c | 17 +++++++++++++---- >> 1 file changed, 13 insertions(+), 4 deletions(-) > > Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com> >
This is acually only an issue with kernels prior to 4.5, so it should be fixed downstream instead. Paolo
