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| author | Stefano Stabellini <stefano.stabellini@xilinx.com> | 2021-02-15 08:53:44 +0100 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2021-02-15 08:53:44 +0100 |
| commit | 36bf1dfb8b266e089afa9b7b984217f17027bf35 (patch) | |
| tree | beb8cddf0a2e8db742905bc9b49d983e4d885220 /arch/arm | |
| parent | ebee0eab08594b2bd5db716288a4f1ae5936e9bc (diff) | |
| download | linux-36bf1dfb8b266e089afa9b7b984217f17027bf35.tar.gz | |
xen/arm: don't ignore return errors from set_phys_to_machine
set_phys_to_machine can fail due to lack of memory, see the kzalloc call in arch/arm/xen/p2m.c:__set_phys_to_machine_multi. Don't ignore the potential return error in set_foreign_p2m_mapping, returning it to the caller instead. This is part of XSA-361. Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com> Cc: stable@vger.kernel.org Reviewed-by: Julien Grall <jgrall@amazon.com> Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/xen/p2m.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/arm/xen/p2m.c b/arch/arm/xen/p2m.c index e52950a43f2e..fd6e3aafe272 100644 --- a/arch/arm/xen/p2m.c +++ b/arch/arm/xen/p2m.c @@ -95,8 +95,10 @@ int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops, for (i = 0; i < count; i++) { if (map_ops[i].status) continue; - set_phys_to_machine(map_ops[i].host_addr >> XEN_PAGE_SHIFT, - map_ops[i].dev_bus_addr >> XEN_PAGE_SHIFT); + if (unlikely(!set_phys_to_machine(map_ops[i].host_addr >> XEN_PAGE_SHIFT, + map_ops[i].dev_bus_addr >> XEN_PAGE_SHIFT))) { + return -ENOMEM; + } } return 0; |