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| author | Pengjie Zhang <zhangpengjie2@huawei.com> | 2025-09-15 09:21:35 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-12-18 16:03:11 +0300 |
| commit | 469b0b8ce08818f3e4f01d2fa8d0dadeab501e1f (patch) | |
| tree | 035dc73f3a07044560632ae3b9c3b5d00a78c84a /drivers/devfreq | |
| parent | 2873d804b4f342c92bd0ff1a151d19e72650430b (diff) | |
| download | linux-469b0b8ce08818f3e4f01d2fa8d0dadeab501e1f.tar.xz | |
PM / devfreq: hisi: Fix potential UAF in OPP handling
[ Upstream commit 26dd44a40096468396b6438985d8e44e0743f64c ]
Ensure all required data is acquired before calling dev_pm_opp_put(opp)
to maintain correct resource acquisition and release order.
Fixes: 7da2fdaaa1e6 ("PM / devfreq: Add HiSilicon uncore frequency scaling driver")
Signed-off-by: Pengjie Zhang <zhangpengjie2@huawei.com>
Reviewed-by: Jie Zhan <zhanjie9@hisilicon.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Link: https://patchwork.kernel.org/project/linux-pm/patch/20250915062135.748653-1-zhangpengjie2@huawei.com/
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/devfreq')
| -rw-r--r-- | drivers/devfreq/hisi_uncore_freq.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/devfreq/hisi_uncore_freq.c b/drivers/devfreq/hisi_uncore_freq.c index 96d1815059e3..c1ed70fa0a40 100644 --- a/drivers/devfreq/hisi_uncore_freq.c +++ b/drivers/devfreq/hisi_uncore_freq.c @@ -265,10 +265,11 @@ static int hisi_uncore_target(struct device *dev, unsigned long *freq, dev_err(dev, "Failed to get opp for freq %lu hz\n", *freq); return PTR_ERR(opp); } - dev_pm_opp_put(opp); data = (u32)(dev_pm_opp_get_freq(opp) / HZ_PER_MHZ); + dev_pm_opp_put(opp); + return hisi_uncore_cmd_send(uncore, HUCF_PCC_CMD_SET_FREQ, &data); } |