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| author | Vasily Averin <vvs@virtuozzo.com> | 2017-11-15 08:47:02 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-11-15 11:47:27 +0300 |
| commit | 0e18dd12064e07519f7cbff4149ca7fff620cbed (patch) | |
| tree | 443be827dfc1bebf5eb95dcd2f8608a6fa4a2463 /kernel/locking/spinlock.c | |
| parent | 58ba4d5a25579e5c7e312bd359c95f3a9a0a242c (diff) | |
| download | linux-0e18dd12064e07519f7cbff4149ca7fff620cbed.tar.xz | |
perf/core: Fix memory leak triggered by perf --namespace
perf with --namespace key leaks various memory objects including namespaces
4.14.0+
pid_namespace 1 12 2568 12 8
user_namespace 1 39 824 39 8
net_namespace 1 5 6272 5 8
This happen because perf_fill_ns_link_info() struct patch ns_path:
during initialization ns_path incremented counters on related mnt and dentry,
but without lost path_put nobody decremented them back.
Leaked dentry is name of related namespace,
and its leak does not allow to free unused namespace.
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Hari Bathini <hbathini@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: commit e422267322cd ("perf: Add PERF_RECORD_NAMESPACES to include namespaces related info")
Link: http://lkml.kernel.org/r/c510711b-3904-e5e1-d296-61273d21118d@virtuozzo.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/locking/spinlock.c')
0 files changed, 0 insertions, 0 deletions