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4225fea1cb
linux/drivers/ptp
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Yang Yingliang 4225fea1cb 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().

Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: a33121e548 ("ptp: fix the race between the release of ptp_clock and cdev")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-10-20 14:44:33 +01:00
..
idt8a340_reg.h ptp: ptp_clockmatrix: Add wait_for_sys_apll_dpll_lock. 2021-02-17 13:49:25 -08:00
Kconfig ptp: ocp: add COMMON_CLK dependency 2021-09-20 11:11:54 +01:00
Makefile ptp: add ptp virtual clock driver framework 2021-07-01 13:08:18 -07:00
ptp_chardev.c ptp: only allow phase values lower than 1 period 2020-08-05 12:06:44 -07:00
ptp_clock.c ptp: Fix possible memory leak in ptp_clock_register() 2021-10-20 14:44:33 +01:00
ptp_clockmatrix.c ptp: ptp_clockmatrix: Demote non-kernel-doc header to standard comment 2021-03-12 17:09:34 -08:00
ptp_clockmatrix.h ptp: ptp_clockmatrix: Remove unused header declarations. 2021-02-17 13:49:25 -08:00
ptp_dte.c ptp: ptp_dte: use devm_platform_ioremap_resource() to simplify code 2019-10-10 16:21:13 -07:00
ptp_idt82p33.c ptp: idt82p33: optimize _idt82p33_adjfine 2020-11-07 13:10:31 -08:00
ptp_idt82p33.h ptp: idt82p33: use i2c_master_send for bus write 2020-11-07 13:10:27 -08:00
ptp_ines.c ptp: ptp_ines: use new PTP_MSGTYPE_* define(s) 2020-11-23 13:43:39 -08:00
ptp_kvm_arm.c ptp: arm/arm64: Enable ptp_kvm for arm/arm64 2021-04-07 16:33:20 +01:00
ptp_kvm_common.c ptp: Don't print an error if ptp_kvm is not supported 2021-04-20 17:17:55 +01:00
ptp_kvm_x86.c ptp: fix error print of ptp_kvm on X86_64 platform 2021-10-15 11:19:25 +01:00
ptp_ocp.c ptp: ocp: Fix error path for pci_ocp_device_init() 2021-08-16 17:18:39 -07:00
ptp_pch.c ptp_pch: Load module automatically if ID matches 2021-10-02 16:13:00 +01:00
ptp_private.h ptp: add kernel API ptp_get_vclocks_index() 2021-07-01 13:08:18 -07:00
ptp_qoriq_debugfs.c
ptp_qoriq.c ptp_qoriq: fix overflow in ptp_qoriq_adjfine() u64 calcalation 2021-03-24 12:10:03 -07:00
ptp_sysfs.c ptp: Fix possible memory leak caused by invalid cast 2021-08-08 12:56:41 +01:00
ptp_vclock.c ethernet: fix PTP_1588_CLOCK dependencies 2021-08-13 17:49:05 -07:00
ptp_vmw.c ptp: add VMware virtual PTP clock driver 2020-03-05 17:25:07 -08:00