[PATCH 1/4] ibmebus: fix device reference leaks in sysfs interface
From: Johan Hovold <johan@kernel.org>
Date: 2016-11-01 15:26:36
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
Make sure to drop any reference taken by bus_find_device() in the sysfs
callbacks that are used to create and destroy devices based on
device-tree entries.
Fixes: 6bccf755ff53 ("[POWERPC] ibmebus: dynamic addition/removal...)
Signed-off-by: Johan Hovold <johan@kernel.org>
---
arch/powerpc/kernel/ibmebus.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/ibmebus.c b/arch/powerpc/kernel/ibmebus.c
index 6ca9a2ffaac7..c7d3ff7e101c 100644
--- a/arch/powerpc/kernel/ibmebus.c
+++ b/arch/powerpc/kernel/ibmebus.c@@ -262,6 +262,7 @@ static ssize_t ibmebus_store_probe(struct bus_type *bus, const char *buf, size_t count) { struct device_node *dn = NULL; + struct device *dev; char *path; ssize_t rc = 0;
@@ -269,8 +270,10 @@ static ssize_t ibmebus_store_probe(struct bus_type *bus, if (!path) return -ENOMEM; - if (bus_find_device(&ibmebus_bus_type, NULL, path, - ibmebus_match_path)) { + dev = bus_find_device(&ibmebus_bus_type, NULL, path, + ibmebus_match_path); + if (dev) { + put_device(dev); printk(KERN_WARNING "%s: %s has already been probed\n", __func__, path); rc = -EEXIST;
@@ -307,6 +310,7 @@ static ssize_t ibmebus_store_remove(struct bus_type *bus, if ((dev = bus_find_device(&ibmebus_bus_type, NULL, path, ibmebus_match_path))) { of_device_unregister(to_platform_device(dev)); + put_device(dev); kfree(path); return count;
--
2.7.3