| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.19 155/639] driver: uio: fix possible memory leak in __uio_register_device | Date | Fri, 24 Jan 2020 10:25:25 +0100 |
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From: Liu Jian <liujian56@huawei.com>
[ Upstream commit 1a392b3de7c5747506b38fc14b2e79977d3c7770 ]
'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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- 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 2762148c169df..e4b418757017f 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -938,8 +938,10 @@ 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; -- 2.20.1
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