Patch "powerpc/powernv: Add a null pointer check in opal_powercap_init()" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

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

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     powerpc-powernv-add-a-null-pointer-check-in-opal_pow.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 88fbff41693c2eb6f23c29402dbe3e3784918d3b
Author: Kunwu Chan <chentao@xxxxxxxxxx>
Date:   Sun Nov 26 17:57:39 2023 +0800

    powerpc/powernv: Add a null pointer check in opal_powercap_init()
    
    [ Upstream commit e123015c0ba859cf48aa7f89c5016cc6e98e018d ]
    
    kasprintf() returns a pointer to dynamically allocated memory
    which can be NULL upon failure.
    
    Fixes: b9ef7b4b867f ("powerpc: Convert to using %pOFn instead of device_node.name")
    Signed-off-by: Kunwu Chan <chentao@xxxxxxxxxx>
    Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
    Link: https://msgid.link/20231126095739.1501990-1-chentao@xxxxxxxxxx
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/arch/powerpc/platforms/powernv/opal-powercap.c b/arch/powerpc/platforms/powernv/opal-powercap.c
index c16d44f6f1d1..ce9ec3962cef 100644
--- a/arch/powerpc/platforms/powernv/opal-powercap.c
+++ b/arch/powerpc/platforms/powernv/opal-powercap.c
@@ -196,6 +196,12 @@ void __init opal_powercap_init(void)
 
 		j = 0;
 		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) {
 			powercap_add_attr(min, "powercap-min",
 					  &pcaps[i].pattrs[j]);