It's possible that dev_set_name() returns -ENOMEM. We could catch and handle it by adding dev_set_name() return value check.

Cc: stable@vger.kernel.org Fixes: a33121e5487b ("ptp: fix the race between the release of ptp_clock and cdev") Signed-off-by: Ma Ke make_ruc2021@163.com --- drivers/ptp/ptp_clock.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c index 77a36e7bddd5..82405c07be3e 100644 --- a/drivers/ptp/ptp_clock.c +++ b/drivers/ptp/ptp_clock.c @@ -348,7 +348,9 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info, ptp->dev.groups = ptp->pin_attr_groups; ptp->dev.release = ptp_clock_release; dev_set_drvdata(&ptp->dev, ptp); - dev_set_name(&ptp->dev, "ptp%d", ptp->index); + err = dev_set_name(&ptp->dev, "ptp%d", ptp->index); + if (err) + goto no_pps;

/* Create a posix clock and link it to the device. */ err = posix_clock_register(&ptp->clock, &ptp->dev);