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linux/drivers/vfio
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Li RongQing f0af7f7ffc vfio/type1: Fix error unwind in migration dirty bitmap allocation 
[ Upstream commit 4518e5a60c ]

When setting up dirty page tracking at the vfio IOMMU backend for
device migration, if an error is encountered allocating a tracking
bitmap, the unwind loop fails to free previously allocated tracking
bitmaps.  This occurs because the wrong loop index is used to
generate the tracking object.  This results in unintended memory
usage for the life of the current DMA mappings where bitmaps were
successfully allocated.

Use the correct loop index to derive the tracking object for
freeing during unwind.

Fixes: d6a4c18566 ("vfio iommu: Implementation of ioctl for dirty pages tracking")
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Link: https://lore.kernel.org/r/20250521034647.2877-1-lirongqing@baidu.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-06-27 11:07:11 +01:00
..
fsl-mc vfio/fsl-mc: Block calling interrupt handler without trigger 2024-04-03 15:19:47 +02:00
mdev vfio/mdev: Fix a null-ptr-deref bug for mdev_unregister_parent() 2023-10-06 14:56:45 +02:00
pci hisi_acc_vfio_pci: add eq and aeq interruption restore 2025-06-27 11:07:11 +01:00
platform vfio/platform: check the bounds of read/write syscalls 2025-02-21 13:49:50 +01:00
container.c vfio: Use GFP_KERNEL_ACCOUNT for userspace persistent allocations 2024-04-03 15:19:34 +02:00
iova_bitmap.c iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index() 2025-02-21 13:49:17 +01:00
Kconfig vfio: Introduce the DMA logging feature support 2022-09-08 12:59:00 -06:00
Makefile vfio: Move container code into drivers/vfio/container.c 2022-09-22 15:46:06 -06:00
vfio.h vfio: Make the group FD disassociate from the iommu_group 2022-10-07 08:10:52 -06:00
vfio_iommu_spapr_tce.c vfio/spapr_tce: Fix the comment 2022-07-22 16:24:47 -06:00
vfio_iommu_type1.c vfio/type1: Fix error unwind in migration dirty bitmap allocation 2025-06-27 11:07:11 +01:00
vfio_main.c vfio: Export the device set open count 2022-11-10 12:03:36 -07:00
vfio_spapr_eeh.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
virqfd.c vfio: Introduce interface to flush virqfd inject workqueue 2024-04-03 15:19:46 +02:00