• Chunyu Hu's avatar
    tracing: Fix kmemleak in instance_rmdir · db9108e0
    Chunyu Hu authored
    Hit the kmemleak when executing instance_rmdir, it forgot releasing
    mem of tracing_cpumask. With this fix, the warn does not appear any
    more.
    
    unreferenced object 0xffff93a8dfaa7c18 (size 8):
      comm "mkdir", pid 1436, jiffies 4294763622 (age 9134.308s)
      hex dump (first 8 bytes):
        ff ff ff ff ff ff ff ff                          ........
      backtrace:
        [<ffffffff88b6567a>] kmemleak_alloc+0x4a/0xa0
        [<ffffffff8861ea41>] __kmalloc_node+0xf1/0x280
        [<ffffffff88b505d3>] alloc_cpumask_var_node+0x23/0x30
        [<ffffffff88b5060e>] alloc_cpumask_var+0xe/0x10
        [<ffffffff88571ab0>] instance_mkdir+0x90/0x240
        [<ffffffff886e5100>] tracefs_syscall_mkdir+0x40/0x70
        [<ffffffff886565c9>] vfs_mkdir+0x109/0x1b0
        [<ffffffff8865b1d0>] SyS_mkdir+0xd0/0x100
        [<ffffffff88403857>] do_syscall_64+0x67/0x150
        [<ffffffff88b710e7>] return_from_SYSCALL_64+0x0/0x6a
        [<ffffffffffffffff>] 0xffffffffffffffff
    
    Link: http://lkml.kernel.org/r/1500546969-12594-1-git-send-email-chuhu@redhat.com
    
    Cc: stable@vger.kernel.org
    Fixes: ccfe9e42 ("tracing: Make tracing_cpumask available for all instances")
    Signed-off-by: default avatarChunyu Hu <chuhu@redhat.com>
    Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
    db9108e0
trace.c 201 KB