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usb: gadget: fix potential double-free in m66592_probe. 

[ Upstream commit 44734a5941 ]

m66592_free_request() is called under label "err_add_udc"
and "clean_up", and m66592->ep0_req is not set to NULL after
first free, leading to a double-free. Fix this issue by
setting m66592->ep0_req to NULL after the first free.

Fixes: 0f91349b89 ("usb: gadget: convert all users to the new udc infrastructure")
Signed-off-by: Qiushi Wu <wu000273@umn.edu>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Qiushi Wu 2020-05-22 23:06:25 -05:00 committed by Greg Kroah-Hartman
parent 51ad579d64
commit 84e1326ffc
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/gadget/udc/m66592-udc.c
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@ -1667,7 +1667,7 @@ static int m66592_probe(struct platform_device *pdev)
err_add_udc:
m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
m66592->ep0_req = NULL;
clean_up3:
if (m66592->pdata->on_chip) {
clk_disable(m66592->clk);