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| author | Jiri Olsa <jolsa@kernel.org> | 2017-04-11 09:14:46 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-04-11 09:48:12 +0200 |
| commit | 7f00f388712b29005782bad7e4b25942620f3b9c (patch) | |
| tree | f8b1b2f7a6ec3238171276b7c3ecac242fccc36d /arch/x86/kernel/ftrace.c | |
| parent | x86/debug: Fix the printk() debug output of signal_fault(), do_trap() and do_... (diff) | |
| download | linux-7f00f388712b29005782bad7e4b25942620f3b9c.tar.xz linux-7f00f388712b29005782bad7e4b25942620f3b9c.zip | |
x86/intel_rdt: Fix locking in rdtgroup_schemata_write()
The schemata lock is released before freeing the resource's temporary
tmp_cbms allocation. That's racy versus another write which allocates and
uses new temporary storage, resulting in memory leaks, freeing in use
memory, double a free or any combination of those.
Move the unlock after the release code.
Fixes: 60ec2440c63d ("x86/intel_rdt: Add schemata file")
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Shaohua Li <shli@fb.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20170411071446.15241-1-jolsa@kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/ftrace.c')
0 files changed, 0 insertions, 0 deletions