hostwin is allocated and added to hostwin_list in vfio_host_win_add, but
it is only deleted from hostwin_list in vfio_host_win_del, which causes
a memory leak. Also, freeing all elements in hostwin_list is missing in
vfio_disconnect_container.
Fix: 2e4109de8e58 ("vfio/spapr: Create DMA window dynamically (SPAPR IOMMU v2)")
CC: qemu-stable@nongnu.org
Signed-off-by: Peng Liang <liangpeng10@huawei.com>
---
v1 -> v2:
- Don't change to _SAFE variant in vfio_host_win_del. [Alex]
---
hw/vfio/common.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index dd387b0d3959..080046e3f511 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -551,6 +551,7 @@ static int vfio_host_win_del(VFIOContainer *container, hwaddr min_iova,
QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) {
if (hostwin->min_iova == min_iova && hostwin->max_iova == max_iova) {
QLIST_REMOVE(hostwin, hostwin_next);
+ g_free(hostwin);
return 0;
}
}
@@ -2239,6 +2240,7 @@ static void vfio_disconnect_container(VFIOGroup *group)
if (QLIST_EMPTY(&container->group_list)) {
VFIOAddressSpace *space = container->space;
VFIOGuestIOMMU *giommu, *tmp;
+ VFIOHostDMAWindow *hostwin, *next;
QLIST_REMOVE(container, next);
@@ -2249,6 +2251,12 @@ static void vfio_disconnect_container(VFIOGroup *group)
g_free(giommu);
}
+ QLIST_FOREACH_SAFE(hostwin, &container->hostwin_list, hostwin_next,
+ next) {
+ QLIST_REMOVE(hostwin, hostwin_next);
+ g_free(hostwin);
+ }
+
trace_vfio_disconnect_container(container->fd);
close(container->fd);
g_free(container);
--
2.33.1
On Wed, 17 Nov 2021 09:47:39 +0800 Peng Liang <liangpeng10@huawei.com> wrote: > hostwin is allocated and added to hostwin_list in vfio_host_win_add, but > it is only deleted from hostwin_list in vfio_host_win_del, which causes > a memory leak. Also, freeing all elements in hostwin_list is missing in > vfio_disconnect_container. > > Fix: 2e4109de8e58 ("vfio/spapr: Create DMA window dynamically (SPAPR IOMMU v2)") > CC: qemu-stable@nongnu.org > Signed-off-by: Peng Liang <liangpeng10@huawei.com> > --- > v1 -> v2: > - Don't change to _SAFE variant in vfio_host_win_del. [Alex] > --- > hw/vfio/common.c | 8 ++++++++ > 1 file changed, 8 insertions(+) Thanks, pull request sent to include this in 6.2. Alex > > diff --git a/hw/vfio/common.c b/hw/vfio/common.c > index dd387b0d3959..080046e3f511 100644 > --- a/hw/vfio/common.c > +++ b/hw/vfio/common.c > @@ -551,6 +551,7 @@ static int vfio_host_win_del(VFIOContainer *container, hwaddr min_iova, > QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) { > if (hostwin->min_iova == min_iova && hostwin->max_iova == max_iova) { > QLIST_REMOVE(hostwin, hostwin_next); > + g_free(hostwin); > return 0; > } > } > @@ -2239,6 +2240,7 @@ static void vfio_disconnect_container(VFIOGroup *group) > if (QLIST_EMPTY(&container->group_list)) { > VFIOAddressSpace *space = container->space; > VFIOGuestIOMMU *giommu, *tmp; > + VFIOHostDMAWindow *hostwin, *next; > > QLIST_REMOVE(container, next); > > @@ -2249,6 +2251,12 @@ static void vfio_disconnect_container(VFIOGroup *group) > g_free(giommu); > } > > + QLIST_FOREACH_SAFE(hostwin, &container->hostwin_list, hostwin_next, > + next) { > + QLIST_REMOVE(hostwin, hostwin_next); > + g_free(hostwin); > + } > + > trace_vfio_disconnect_container(container->fd); > close(container->fd); > g_free(container);
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