| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 083/148] USB: gadgetfs: Fix a potential memory leak in dev_config() | Date | Tue, 12 Dec 2017 13:44:53 +0100 |
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4.9-stable review patch. If anyone has any objections, please let me know.
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From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
[ Upstream commit b6e7aeeaf235901c42ec35de4633c7c69501d303 ]
'kbuf' is allocated just a few lines above using 'memdup_user()'. If the 'if (dev->buf)' test fails, this memory is never released.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/usb/gadget/legacy/inode.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/usb/gadget/legacy/inode.c +++ b/drivers/usb/gadget/legacy/inode.c @@ -1819,8 +1819,10 @@ dev_config (struct file *fd, const char spin_lock_irq (&dev->lock); value = -EINVAL; - if (dev->buf) + if (dev->buf) { + kfree(kbuf); goto fail; + } dev->buf = kbuf; /* full or low speed config */
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