CVE-2021-47455

In the Linux kernel, the following vulnerability has been resolved: ptp:
Fix possible memory leak in ptp_clock_register() I got memory leak as
follows when doing fault injection test: unreferenced object
0xffff88800906c618 (size 8): comm “i2c-idt82p33931”, pid 4421, jiffies
4294948083 (age 13.188s) hex dump (first 8 bytes): 70 74 70 30 00 00 00 00
ptp0… backtrace: [<00000000312ed458>] __kmalloc_track_caller+0x19f/0x3a0
[<0000000079f6e2ff>] kvasprintf+0xb5/0x150 [<0000000026aae54f>]
kvasprintf_const+0x60/0x190 [<00000000f323a5f7>]
kobject_set_name_vargs+0x56/0x150 [<000000004e35abdd>]
dev_set_name+0xc0/0x100 [<00000000f20cfe25>] ptp_clock_register+0x9f4/0xd30
[ptp] [<000000008bb9f0de>] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33]
When posix_clock_register() returns an error, the name allocated in
dev_set_name() will be leaked, the put_device() should be used to give up
the device reference, then the name will be freed in kobject_cleanup() and
other memory will be freed in ptp_clock_release().