Re: [PATCH] usb: musb: tusb6010: uninitialized data in tusb_fifo_write_unaligned()

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Le 15/09/2021 à 12:36, Dan Carpenter a écrit :
This is writing to the first 1 - 3 bytes of "len" and then writing all
four bytes to musb_writel().  The last byte is always going to be
garbage.  Zero out the last bytes instead.

Fixes: 550a7375fe72 ("USB: Add MUSB and TUSB support")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
  drivers/usb/musb/tusb6010.c | 1 +
  1 file changed, 1 insertion(+)

diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c
index c42937692207..c510fb84faa6 100644
--- a/drivers/usb/musb/tusb6010.c
+++ b/drivers/usb/musb/tusb6010.c
@@ -190,6 +190,7 @@ tusb_fifo_write_unaligned(void __iomem *fifo, const u8 *buf, u16 len)
  	}
  	if (len > 0) {
  		/* Write the rest 1 - 3 bytes to FIFO */
+		len = 0;

+		val = 0;
?

  		memcpy(&val, buf, len);
  		musb_writel(fifo, 0, val);
  	}



CJ



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