Messages in this thread Patch in this message | | | From | Yangbo Lu <> | Subject | [net] ptp: fix NULL pointer dereference in ptp_clock_register | Date | Mon, 5 Jul 2021 16:53:06 +0800 |
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Fix NULL pointer dereference in ptp_clock_register. The argument "parent" of ptp_clock_register may be NULL pointer.
Fixes: 73f37068d540 ("ptp: support ptp physical/virtual clocks conversion") Reported-by: kernel test robot <oliver.sang@intel.com> Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> --- drivers/ptp/ptp_clock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c index f012fa581cf4..ce6d9fc85607 100644 --- a/drivers/ptp/ptp_clock.c +++ b/drivers/ptp/ptp_clock.c @@ -236,7 +236,7 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info, } /* PTP virtual clock is being registered under physical clock */ - if (parent->class && parent->class->name && + if (parent && parent->class && parent->class->name && strcmp(parent->class->name, "ptp") == 0) ptp->is_virtual_clock = true; base-commit: 6ff63a150b5556012589ae59efac1b5eeb7d32c3 -- 2.25.1
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