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author | Junhao He <hejunhao3@huawei.com> | 2024-04-25 15:46:25 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-30 10:44:26 +0300 |
commit | ff48247144d13a3a0817127703724256008efa78 (patch) | |
tree | a01861877ec0cc898c8f234146ebe481af2747be /drivers/perf/hisilicon/hns3_pmu.c | |
parent | f38d98652a2d1ef09f1e6205383535a04c0f16b9 (diff) | |
download | linux-ff48247144d13a3a0817127703724256008efa78.tar.xz |
drivers/perf: hisi_pcie: Fix out-of-bound access when valid event group
[ Upstream commit 77fce82678ea5fd51442e62febec2004f79e041b ]
The perf tool allows users to create event groups through following
cmd [1], but the driver does not check whether the array index is out of
bounds when writing data to the event_group array. If the number of events
in an event_group is greater than HISI_PCIE_MAX_COUNTERS, the memory write
overflow of event_group array occurs.
Add array index check to fix the possible array out of bounds violation,
and return directly when write new events are written to array bounds.
There are 9 different events in an event_group.
[1] perf stat -e '{pmu/event1/, ... ,pmu/event9/}'
Fixes: 8404b0fbc7fb ("drivers/perf: hisi: Add driver for HiSilicon PCIe PMU")
Signed-off-by: Junhao He <hejunhao3@huawei.com>
Reviewed-by: Jijie Shao <shaojijie@huawei.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20240425124627.13764-2-hejunhao3@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/perf/hisilicon/hns3_pmu.c')
0 files changed, 0 insertions, 0 deletions