usb: xhci: Fix a potential null pointer dereference in xhci_debugfs_create_endpoint()
[ Upstream commit 5bce256f ] In xhci_debugfs_create_slot(), kzalloc() can fail and dev->debugfs_private will be NULL. In xhci_debugfs_create_endpoint(), dev->debugfs_private is used without any null-pointer check, and can cause a null pointer dereference. To fix this bug, a null-pointer check is added in xhci_debugfs_create_endpoint(). This bug is found by a runtime fuzzing tool named FIZZER written by us. [subjet line change change, add potential -Mathais] Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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