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xen-netback: validate queue numbers in xenvif_set_hash_mapping()

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Checking them before the grant copy means nothing as to the validity of
the incoming request. As we shouldn't make the new data live before
having validated it, introduce a second instance of the mapping array.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jan Beulich
2018-09-25 02:13:01 -06:00
committed by David S. Miller
parent 780e83c259
commit 22f9cde340
3 changed files with 18 additions and 8 deletions
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3
drivers/net/xen-netback/common.h
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@@ -241,8 +241,9 @@ struct xenvif_hash_cache {
struct xenvif_hash {
unsigned int alg;
u32 flags;
bool mapping_sel;
u8 key[XEN_NETBK_MAX_HASH_KEY_SIZE];
u32 mapping[XEN_NETBK_MAX_HASH_MAPPING_SIZE];
u32 mapping[2][XEN_NETBK_MAX_HASH_MAPPING_SIZE];
unsigned int size;
struct xenvif_hash_cache cache;
};