6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Herve Codina <herve.codina@xxxxxxxxxxx>
commit 6ce3e98184b625d2870991880bf9586ded7ea7f9 upstream.
fwnode_handle_get(fwnode) is called when a domain is created with fwnode
passed as a function parameter. fwnode_handle_put(domain->fwnode) is called
when the domain is destroyed but during the creation a path exists that
does not set domain->fwnode.
If this path is taken, the fwnode get will never be put.
To avoid the unbalanced get and put, set domain->fwnode unconditionally.
Fixes: d59f6617eef0 ("genirq: Allow fwnode to carry name information only")
Signed-off-by: Herve Codina <herve.codina@xxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20240614173232.1184015-4-herve.codina@xxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/irq/irqdomain.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -154,7 +154,6 @@ static struct irq_domain *__irq_domain_c
switch (fwid->type) {
case IRQCHIP_FWNODE_NAMED:
case IRQCHIP_FWNODE_NAMED_ID:
- domain->fwnode = fwnode;
domain->name = kstrdup(fwid->name, GFP_KERNEL);
if (!domain->name) {
kfree(domain);
@@ -163,7 +162,6 @@ static struct irq_domain *__irq_domain_c
domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
break;
default:
- domain->fwnode = fwnode;
domain->name = fwid->name;
break;
}
@@ -183,7 +181,6 @@ static struct irq_domain *__irq_domain_c
}
domain->name = strreplace(name, '/', ':');
- domain->fwnode = fwnode;
domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
}
@@ -199,8 +196,8 @@ static struct irq_domain *__irq_domain_c
domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
}
- fwnode_handle_get(fwnode);
- fwnode_dev_initialized(fwnode, true);
+ domain->fwnode = fwnode_handle_get(fwnode);
+ fwnode_dev_initialized(domain->fwnode, true);
/* Fill structure */
INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL);
