Steve Sistare 5f63c879ca vfio/type1: restore locked_vm ... commit 90fdd158a6 upstream. When a vfio container is preserved across exec or fork-exec, the new task's mm has a locked_vm count of 0. After a dma vaddr is updated using VFIO_DMA_MAP_FLAG_VADDR, locked_vm remains 0, and the pinned memory does not count against the task's RLIMIT_MEMLOCK. To restore the correct locked_vm count, when VFIO_DMA_MAP_FLAG_VADDR is used and the dma's mm has changed, add the dma's locked_vm count to the new mm->locked_vm, subject to the rlimit, and subtract it from the old mm->locked_vm. Fixes: c3cbab24db ("vfio/type1: implement interfaces to update vaddr") Cc: stable@vger.kernel.org Signed-off-by: Steve Sistare <steven.sistare@oracle.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/1675184289-267876-5-git-send-email-steven.sistare@oracle.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-03-10 09:40:13 +01:00
..
fsl-mc	vfio: Use kconfig if XX/endif blocks instead of repeating 'depends on'	2021-08-26 10:36:51 -06:00
mdev	VFIO update for v5.15-rc1	2021-09-02 13:41:33 -07:00
pci	vfio/pci: Fix vf_token mechanism when device-specific VF drivers are used	2022-04-20 09:34:13 +02:00
platform	vfio: platform: Do not pass return buffer to ACPI _RST method	2022-12-31 13:14:27 +01:00
Kconfig	vfio: Use kconfig if XX/endif blocks instead of repeating 'depends on'	2021-08-26 10:36:51 -06:00
Makefile	vfio/fsl-mc: Add VFIO framework skeleton for fsl-mc devices	2020-10-07 14:17:33 -06:00
vfio.c	vfio: Clear the caps->buf to NULL after free	2022-08-25 11:40:41 +02:00
vfio_iommu_spapr_tce.c	vfio/spapr_tce: convert get_user_pages() --> pin_user_pages()	2020-07-27 13:43:38 -06:00
vfio_iommu_type1.c	vfio/type1: restore locked_vm	2023-03-10 09:40:13 +01:00
vfio_spapr_eeh.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
virqfd.c	vfio/virqfd: Drain events from eventfd in virqfd_wakeup()	2020-11-15 09:49:10 -05:00