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| author | Chunyu Hu <chuhu@redhat.com> | 2017-07-20 18:36:09 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-27 15:03:29 -0700 |
| commit | d40d512105e3f16c2cb3bf3ba8533681650cfeb2 (patch) | |
| tree | d3ab0d509c1bde90c23a95cbf09cb6818dc3cdb4 /kernel | |
| parent | c0cb1831e96c8e08586b7c9b3e21e0e62d3ead61 (diff) | |
| download | linux-stable-d40d512105e3f16c2cb3bf3ba8533681650cfeb2.tar.gz linux-stable-d40d512105e3f16c2cb3bf3ba8533681650cfeb2.tar.bz2 linux-stable-d40d512105e3f16c2cb3bf3ba8533681650cfeb2.zip | |
tracing: Fix kmemleak in instance_rmdir
commit db9108e054700c96322b0f0028546aa4e643cf0b upstream.
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
Fixes: ccfe9e42e451 ("tracing: Make tracing_cpumask available for all instances")
Signed-off-by: Chunyu Hu <chuhu@redhat.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 5b83ac63e7e9..111dfd986dbf 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -6405,6 +6405,7 @@ static int instance_delete(const char *name) debugfs_remove_recursive(tr->dir); free_trace_buffers(tr); + free_cpumask_var(tr->tracing_cpumask); kfree(tr->name); kfree(tr); |