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Subject[PATCH v2 1/2] driver: uio: fix possible memory leak in __uio_register_device
Date
'idev' is malloced in __uio_register_device() and leak free it before
leaving from the uio_get_minor() error handing case, it will cause
memory leak.

Fixes: a93e7b331568 ("uio: Prevent device destruction while fds are
open")
Signed-off-by: Liu Jian <liujian56@huawei.com>
Reviewed-by: Hamish Martin <hamish.martin@alliedtelesis.co.nz>
---
drivers/uio/uio.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index b4ae2d9..4d20220 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -941,8 +941,10 @@ int __uio_register_device(struct module *owner,
atomic_set(&idev->event, 0);

ret = uio_get_minor(idev);
- if (ret)
+ if (ret) {
+ kfree(idev);
return ret;
+ }

idev->dev.devt = MKDEV(uio_major, idev->minor);
idev->dev.class = &uio_class;
--
2.7.4
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