From: Hangyu Hua <hbh25y@gmail.com> mainline inclusion from mainline-v5.17-rc1 commit 89f3594d0de58e8a57d92d497dea9fee3d4b9cda category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I4U74M CVE: CVE-2022-24958 -------------------------------- dev->buf does not need to be released if it already exists before executing dev_config. Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Hangyu Hua <hbh25y@gmail.com> Link: https://lore.kernel.org/r/20211231172138.7993-2-hbh25y@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Yuan Can <yuancan@huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> --- drivers/usb/gadget/legacy/inode.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c index 523d05e5dca5..454860d52ce7 100644 --- a/drivers/usb/gadget/legacy/inode.c +++ b/drivers/usb/gadget/legacy/inode.c @@ -1828,8 +1828,9 @@ dev_config (struct file *fd, const char __user *buf, size_t len, loff_t *ptr) spin_lock_irq (&dev->lock); value = -EINVAL; if (dev->buf) { + spin_unlock_irq(&dev->lock); kfree(kbuf); - goto fail; + return value; } dev->buf = kbuf; -- 2.20.1