• Zhang Rui's avatar
    acpi-cpufreq: fix a memleak when unloading driver · dab5fff1
    Zhang Rui authored
    We didn't free per_cpu(acfreq_data, cpu)->freq_table
    when acpi_freq driver is unloaded.
    
    Resulting in the following messages in /sys/kernel/debug/kmemleak:
    
    unreferenced object 0xf6450e80 (size 64):
      comm "modprobe", pid 1066, jiffies 4294677317 (age 19290.453s)
      hex dump (first 32 bytes):
        00 00 00 00 e8 a2 24 00 01 00 00 00 00 9f 24 00  ......$.......$.
        02 00 00 00 00 6a 18 00 03 00 00 00 00 35 0c 00  .....j.......5..
      backtrace:
        [<c123ba97>] kmemleak_alloc+0x27/0x50
        [<c109f96f>] __kmalloc+0xcf/0x110
        [<f9da97ee>] acpi_cpufreq_cpu_init+0x1ee/0x4e4 [acpi_cpufreq]
        [<c11cd8d2>] cpufreq_add_dev+0x142/0x3a0
        [<c11920b7>] sysdev_driver_register+0x97/0x110
        [<c11cce56>] cpufreq_register_driver+0x86/0x140
        [<f9dad080>] 0xf9dad080
        [<c1001130>] do_one_initcall+0x30/0x160
        [<c10626e9>] sys_init_module+0x99/0x1e0
        [<c1002d97>] sysenter_do_call+0x12/0x26
        [<ffffffff>] 0xffffffff
    
    https://bugzilla.kernel.org/show_bug.cgi?id=15807#c21Tested-by: default avatarToralf Forster <toralf.foerster@gmx.de>
    Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
    Signed-off-by: default avatarLen Brown <len.brown@intel.com>
    dab5fff1
acpi-cpufreq.c 19.2 KB