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xen/pvcalls: free active map buffer on pvcalls_front_free_map 

[ Upstream commit f57034cede ]

Data buffer for active map is allocated in alloc_active_ring and freed
in free_active_ring function, which is used only for the error
cleanup. pvcalls_front_release is calling pvcalls_front_free_map which
ends foreign access for this buffer, but doesn't free allocated pages.
Call free_active_ring to clean all allocated resources.

Signed-off-by: Oleksii Moisieiev <oleksii_moisieiev@epam.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Link: https://lore.kernel.org/r/6a762ee32dd655cbb09a4aa0e2307e8919761311.1671531297.git.oleksii_moisieiev@epam.com
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Oleksii Moisieiev 2022-12-20 14:50:13 +00:00 committed by Greg Kroah-Hartman
parent 25714807b1
commit b91ec58ffb
1 changed files with 3 additions and 1 deletions
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4
drivers/xen/pvcalls-front.c
View File

@ -225,6 +225,8 @@ again:
return IRQ_HANDLED;
}
static void free_active_ring(struct sock_mapping *map);
static void pvcalls_front_free_map(struct pvcalls_bedata *bedata,
struct sock_mapping *map)
{
@ -240,7 +242,7 @@ static void pvcalls_front_free_map(struct pvcalls_bedata *bedata,
for (i = 0; i < (1 << PVCALLS_RING_ORDER); i++)
gnttab_end_foreign_access(map->active.ring->ref[i], NULL);
gnttab_end_foreign_access(map->active.ref, NULL);
free_page((unsigned long)map->active.ring);
free_active_ring(map);
kfree(map);
}