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powerpc/powernv: Add a null pointer check in opal_powercap_init()

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[ Upstream commit e123015c0ba859cf48aa7f89c5016cc6e98e018d ]

kasprintf() returns a pointer to dynamically allocated memory
which can be NULL upon failure.

Fixes: b9ef7b4b86 ("powerpc: Convert to using %pOFn instead of device_node.name")
Signed-off-by: Kunwu Chan <chentao@kylinos.cn>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20231126095739.1501990-1-chentao@kylinos.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kunwu Chan 2023-11-26 17:57:39 +08:00 committed by Greg Kroah-Hartman
parent e93d7cf4c1
commit 9da4a56dd3
1 changed files with 6 additions and 0 deletions
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6
arch/powerpc/platforms/powernv/opal-powercap.c
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@ -196,6 +196,12 @@ void __init opal_powercap_init(void)
j = 0; j = 0;
pcaps[i].pg.name = kasprintf(GFP_KERNEL, "%pOFn", node); pcaps[i].pg.name = kasprintf(GFP_KERNEL, "%pOFn", node);
if (!pcaps[i].pg.name) {
kfree(pcaps[i].pattrs);
kfree(pcaps[i].pg.attrs);
goto out_pcaps_pattrs;
}
if (has_min) { if (has_min) {
powercap_add_attr(min, "powercap-min", powercap_add_attr(min, "powercap-min",
&pcaps[i].pattrs[j]); &pcaps[i].pattrs[j]);