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powerpc/kexec: Fix return of uninitialized variable

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of_property_read_u64() can fail and leave the variable uninitialized,
which will then be used. Return error if reading the property failed.

Fixes: 2e6bd221d96f ("powerpc/kexec_file: Enable early kernel OPAL calls")
Signed-off-by: Zhang Zekun <zhangzekun11@huawei.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://patch.msgid.link/20240930075628.125138-1-zhangzekun11@huawei.com
This commit is contained in:
Zhang Zekun 2024-09-30 15:56:28 +08:00 committed by Michael Ellerman
parent 352268dc6d
commit 83b5a407fb
1 changed files with 7 additions and 2 deletions
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9
arch/powerpc/kexec/file_load_64.c
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@ -736,13 +736,18 @@ int setup_purgatory_ppc64(struct kimage *image, const void *slave_code,
if (dn) {
u64 val;
of_property_read_u64(dn, "opal-base-address", &val);
ret = of_property_read_u64(dn, "opal-base-address", &val);
if (ret)
goto out;
ret = kexec_purgatory_get_set_symbol(image, "opal_base", &val,
sizeof(val), false);
if (ret)
goto out;
of_property_read_u64(dn, "opal-entry-address", &val);
ret = of_property_read_u64(dn, "opal-entry-address", &val);
if (ret)
goto out;
ret = kexec_purgatory_get_set_symbol(image, "opal_entry", &val,
sizeof(val), false);
}