powerpc/pseries: fix plpks_read_var() code for different consumers
[ Upstream commit1f622f3f80
] Even though plpks_read_var() is currently called to read variables owned by different consumers, it internally supports only OS consumer. Fix plpks_read_var() to handle different consumers correctly. Fixes:2454a7af0f
("powerpc/pseries: define driver for Platform KeyStore") Signed-off-by: Nayna Jain <nayna@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20221106205839.600442-7-nayna@linux.ibm.com Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -366,22 +366,24 @@ static int plpks_read_var(u8 consumer, struct plpks_var *var)
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{
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unsigned long retbuf[PLPAR_HCALL_BUFSIZE] = { 0 };
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struct plpks_auth *auth;
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struct label *label;
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struct label *label = NULL;
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u8 *output;
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int rc;
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if (var->namelen > MAX_NAME_SIZE)
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return -EINVAL;
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auth = construct_auth(PKS_OS_OWNER);
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auth = construct_auth(consumer);
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if (IS_ERR(auth))
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return PTR_ERR(auth);
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label = construct_label(var->component, var->os, var->name,
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var->namelen);
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if (IS_ERR(label)) {
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rc = PTR_ERR(label);
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goto out_free_auth;
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if (consumer == PKS_OS_OWNER) {
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label = construct_label(var->component, var->os, var->name,
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var->namelen);
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if (IS_ERR(label)) {
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rc = PTR_ERR(label);
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goto out_free_auth;
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}
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}
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output = kzalloc(maxobjsize, GFP_KERNEL);
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@ -390,9 +392,15 @@ static int plpks_read_var(u8 consumer, struct plpks_var *var)
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goto out_free_label;
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}
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rc = plpar_hcall(H_PKS_READ_OBJECT, retbuf, virt_to_phys(auth),
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virt_to_phys(label), label->size, virt_to_phys(output),
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maxobjsize);
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if (consumer == PKS_OS_OWNER)
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rc = plpar_hcall(H_PKS_READ_OBJECT, retbuf, virt_to_phys(auth),
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virt_to_phys(label), label->size, virt_to_phys(output),
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maxobjsize);
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else
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rc = plpar_hcall(H_PKS_READ_OBJECT, retbuf, virt_to_phys(auth),
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virt_to_phys(var->name), var->namelen, virt_to_phys(output),
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maxobjsize);
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if (rc != H_SUCCESS) {
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pr_err("Failed to read variable %s for component %s with error %d\n",
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