diff options
| author | Xiongfeng Wang <wangxiongfeng2@huawei.com> | 2022-11-18 09:31:34 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-11-24 13:09:24 +0300 |
| commit | c508eb042d9739bf9473526f53303721b70e9100 (patch) | |
| tree | db65bd9cd139c5d130d028c16d4480d8ce0d0136 /arch/x86/events/intel | |
| parent | d5b73506b5b1b4a6e675c54b7977ea08e64cba19 (diff) | |
| download | linux-c508eb042d9739bf9473526f53303721b70e9100.tar.xz | |
perf/x86/intel/uncore: Fix reference count leak in sad_cfg_iio_topology()
pci_get_device() will increase the reference count for the returned
pci_dev, and also decrease the reference count for the input parameter
*from* if it is not NULL.
If we break the loop in sad_cfg_iio_topology() with 'dev' not NULL. We
need to call pci_dev_put() to decrease the reference count. Since
pci_dev_put() can handle the NULL input parameter, we can just add one
pci_dev_put() right before 'return ret'.
Fixes: c1777be3646b ("perf/x86/intel/uncore: Enable I/O stacks to IIO PMON mapping on SNR")
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Link: https://lore.kernel.org/r/20221118063137.121512-2-wangxiongfeng2@huawei.com
Diffstat (limited to 'arch/x86/events/intel')
| -rw-r--r-- | arch/x86/events/intel/uncore_snbep.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c index b8f9bd150b42..b14d59183516 100644 --- a/arch/x86/events/intel/uncore_snbep.c +++ b/arch/x86/events/intel/uncore_snbep.c @@ -4743,6 +4743,8 @@ static int sad_cfg_iio_topology(struct intel_uncore_type *type, u8 *sad_pmon_map type->topology[die][stack_id].iio->pci_bus_no = dev->bus->number; } + pci_dev_put(dev); + return ret; } |