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| author | Herve Codina <herve.codina@bootlin.com> | 2024-06-14 20:32:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-08-03 10:00:49 +0300 |
| commit | 3a7f23e1d81ce7a011c15636c182102b365fbb93 (patch) | |
| tree | 41c233c4db5595d06676ad6b0b9232543725194c | |
| parent | 95065edb8ebb27771d5f1e898eef6ab43dc6c87c (diff) | |
| download | linux-3a7f23e1d81ce7a011c15636c182102b365fbb93.tar.xz | |
irqdomain: Fixed unbalanced fwnode get and put
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@bootlin.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240614173232.1184015-4-herve.codina@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | kernel/irq/irqdomain.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index aadc8891cc16..efeacf17c239 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -155,7 +155,6 @@ static struct irq_domain *__irq_domain_create(struct fwnode_handle *fwnode, 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); @@ -164,7 +163,6 @@ static struct irq_domain *__irq_domain_create(struct fwnode_handle *fwnode, domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED; break; default: - domain->fwnode = fwnode; domain->name = fwid->name; break; } @@ -184,7 +182,6 @@ static struct irq_domain *__irq_domain_create(struct fwnode_handle *fwnode, } domain->name = strreplace(name, '/', ':'); - domain->fwnode = fwnode; domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED; } @@ -200,8 +197,8 @@ static struct irq_domain *__irq_domain_create(struct fwnode_handle *fwnode, 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); |