6.6-stable review patch. If anyone has any objections, please let me know.
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From: Kunwu Chan chentao@kylinos.cn
[ Upstream commit 9a260f2dd827bbc82cc60eb4f4d8c22707d80742 ]
kasprintf() returns a pointer to dynamically allocated memory which can be NULL upon failure. Add a null pointer check, and release 'ent' to avoid memory leaks.
Fixes: bfd2f0d49aef ("powerpc/powernv: Get rid of old scom_controller abstraction") Signed-off-by: Kunwu Chan chentao@kylinos.cn Signed-off-by: Michael Ellerman mpe@ellerman.id.au Link: https://msgid.link/20231208085937.107210-1-chentao@kylinos.cn Signed-off-by: Sasha Levin sashal@kernel.org --- arch/powerpc/platforms/powernv/opal-xscom.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/arch/powerpc/platforms/powernv/opal-xscom.c b/arch/powerpc/platforms/powernv/opal-xscom.c index 262cd6fac907..748c2b97fa53 100644 --- a/arch/powerpc/platforms/powernv/opal-xscom.c +++ b/arch/powerpc/platforms/powernv/opal-xscom.c @@ -165,6 +165,11 @@ static int scom_debug_init_one(struct dentry *root, struct device_node *dn, ent->chip = chip; snprintf(ent->name, 16, "%08x", chip); ent->path.data = (void *)kasprintf(GFP_KERNEL, "%pOF", dn); + if (!ent->path.data) { + kfree(ent); + return -ENOMEM; + } + ent->path.size = strlen((char *)ent->path.data);
dir = debugfs_create_dir(ent->name, root);