netlabel: Fix a potential NULL pointer dereference
Fix a potential NULL pointer dereference seen when trying to remove a static label configuration with an invalid address/mask combination. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -574,9 +574,10 @@ static int netlbl_unlhsh_remove_addr4(struct net *net,
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list_entry = netlbl_af4list_remove(addr->s_addr, mask->s_addr,
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&iface->addr4_list);
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spin_unlock(&netlbl_unlhsh_lock);
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if (list_entry == NULL)
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ret_val = -ENOENT;
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if (list_entry != NULL)
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entry = netlbl_unlhsh_addr4_entry(list_entry);
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else
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ret_val = -ENOENT;
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audit_buf = netlbl_audit_start_common(AUDIT_MAC_UNLBL_STCDEL,
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audit_info);
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@ -634,9 +635,10 @@ static int netlbl_unlhsh_remove_addr6(struct net *net,
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spin_lock(&netlbl_unlhsh_lock);
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list_entry = netlbl_af6list_remove(addr, mask, &iface->addr6_list);
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spin_unlock(&netlbl_unlhsh_lock);
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if (list_entry == NULL)
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ret_val = -ENOENT;
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if (list_entry != NULL)
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entry = netlbl_unlhsh_addr6_entry(list_entry);
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else
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ret_val = -ENOENT;
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audit_buf = netlbl_audit_start_common(AUDIT_MAC_UNLBL_STCDEL,
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audit_info);
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