This is a note to let you know that I've just added the patch titled
USB: serial: io_edgeport: fix possible sleep-in-atomic
to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-testing branch.
The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)
The patch will be merged to the usb-next branch sometime soon, after it passes testing, and the merge window is open.
If you have any questions about this process, please let me know.
From c7b8f77872c73f69a16528a9eb87afefcccdc18b Mon Sep 17 00:00:00 2001
From: Jia-Ju Bai baijiaju1990@gmail.com Date: Wed, 13 Dec 2017 20:34:36 +0800 Subject: USB: serial: io_edgeport: fix possible sleep-in-atomic
According to drivers/usb/serial/io_edgeport.c, the driver may sleep under a spinlock. The function call path is: edge_bulk_in_callback (acquire the spinlock) process_rcvd_data process_rcvd_status change_port_settings send_iosp_ext_cmd write_cmd_usb usb_kill_urb --> may sleep
To fix it, the redundant usb_kill_urb() is removed from the error path after usb_submit_urb() fails.
This possible bug is found by my static analysis tool (DSAC) and checked by my code review.
Signed-off-by: Jia-Ju Bai baijiaju1990@gmail.com Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable stable@vger.kernel.org Signed-off-by: Johan Hovold johan@kernel.org --- drivers/usb/serial/io_edgeport.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c index 219265ce3711..17283f4b4779 100644 --- a/drivers/usb/serial/io_edgeport.c +++ b/drivers/usb/serial/io_edgeport.c @@ -2282,7 +2282,6 @@ static int write_cmd_usb(struct edgeport_port *edge_port, /* something went wrong */ dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n", __func__, status); - usb_kill_urb(urb); usb_free_urb(urb); atomic_dec(&CmdUrbs); return status;