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tracing: Fix kmemleak in instance_rmdir
author
Chunyu Hu
<chuhu@redhat.com>
Thu, 20 Jul 2017 10:36:09 +0000
(18:36 +0800)
committer
Steven Rostedt (VMware)
<rostedt@goodmis.org>
Thu, 20 Jul 2017 13:24:25 +0000
(09:24 -0400)
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:
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>
kernel/trace/trace.c
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diff --git
a/kernel/trace/trace.c
b/kernel/trace/trace.c
index 2d0ffcc49dba0354e17f2a083d86ad407fc2b425..42b9355033d45d5a7c27bf0606799772e70d7421 100644
(file)
--- a/
kernel/trace/trace.c
+++ b/
kernel/trace/trace.c
@@
-7774,6
+7774,7
@@
static int instance_rmdir(const char *name)
}
kfree(tr->topts);
+ free_cpumask_var(tr->tracing_cpumask);
kfree(tr->name);
kfree(tr);