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linux-imx/drivers/cpufreq
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Christian Marangi 22d4c2a841 cpufreq: stats: Fix buffer overflow detection in trans_stats() 
commit ea167a7fc2 upstream.

Commit 3c0897c180 ("cpufreq: Use scnprintf() for avoiding potential
buffer overflow") switched from snprintf to the more secure scnprintf
but never updated the exit condition for PAGE_SIZE.

As the commit say and as scnprintf document, what scnprintf returns what
is actually written not counting the '\0' end char. This results in the
case of len exceeding the size, len set to PAGE_SIZE - 1, as it can be
written at max PAGE_SIZE - 1 (as '\0' is not counted)

Because of len is never set to PAGE_SIZE, the function never break early,
never prints the warning and never return -EFBIG.

Fix this by changing the condition to PAGE_SIZE - 1 to correctly trigger
the error.

Cc: 5.10+ <stable@vger.kernel.org> # 5.10+
Fixes: 3c0897c180 ("cpufreq: Use scnprintf() for avoiding potential buffer overflow")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-11-28 17:20:00 +00:00
..
acpi-cpufreq.c cpufreq: acpi: Convert to platform remove callback returning void 2023-07-20 16:02:13 +05:30
amd_freq_sensitivity.c
amd-pstate-trace.c
amd-pstate-trace.h
amd-pstate-ut.c ARM cpufreq updates for 6.6 2023-08-28 14:12:05 +02:00
amd-pstate.c cpufreq: amd-pstate: fix global sysfs attribute type 2023-08-07 19:41:48 +02:00
apple-soc-cpufreq.c cpufreq: apple-soc: Fix an IS_ERR() vs NULL check 2023-03-01 19:34:54 +01:00
armada-8k-cpufreq.c cpufreq: armada-8k: add ap807 support 2023-06-19 09:50:31 +05:30
armada-37xx-cpufreq.c cpufreq: Explicitly include correct DT includes 2023-07-20 16:01:57 +05:30
bmips-cpufreq.c
brcmstb-avs-cpufreq.c cpufreq: brcmstb-avs-cpufreq: Fix -Warray-bounds bug 2023-08-03 11:25:04 +05:30
cppc_cpufreq.c cpufreq: cppc: Set fie_disabled to FIE_DISABLED if fails to create kworker_fie 2023-08-17 14:24:58 +05:30
cpufreq_conservative.c
cpufreq_governor_attr_set.c
cpufreq_governor.c cpufreq: governor: Free dbs_data directly when gov->init() fails 2023-08-29 20:21:35 +02:00
cpufreq_governor.h
cpufreq_ondemand.c
cpufreq_ondemand.h
cpufreq_performance.c
cpufreq_powersave.c
cpufreq_stats.c cpufreq: stats: Fix buffer overflow detection in trans_stats() 2023-11-28 17:20:00 +00:00
cpufreq_userspace.c
cpufreq-dt-platdev.c cpufreq: blocklist more Qualcomm platforms in cpufreq-dt-platdev 2023-08-09 10:57:18 +05:30
cpufreq-dt.c cpufreq: dt: Convert to platform remove callback returning void 2023-07-20 16:02:12 +05:30
cpufreq-dt.h
cpufreq-nforce2.c
cpufreq.c cpufreq: Support per-policy performance boost 2023-08-29 20:51:40 +02:00
davinci-cpufreq.c cpufreq: davinci: Convert to platform remove callback returning void 2023-07-20 16:02:13 +05:30
e_powersaver.c
elanfreq.c
freq_table.c Updates for 6.4 2023-04-20 19:30:01 +02:00
gx-suspmod.c
highbank-cpufreq.c
ia64-acpi-cpufreq.c
imx-cpufreq-dt.c cpufreq: imx-cpufreq-dt: Convert to platform remove callback returning void 2023-07-20 16:02:13 +05:30
imx6q-cpufreq.c cpufreq: imx6q: Convert to platform remove callback returning void 2023-07-20 16:02:12 +05:30
intel_pstate.c cpufreq: intel_pstate: set stale CPU frequency to minimum 2023-08-21 21:11:40 +02:00
Kconfig cpufreq: Make CONFIG_CPUFREQ_DT_PLATDEV depend on OF 2023-06-30 09:43:43 +02:00
Kconfig.arm cpufreq: Fix typo in the ARM_BRCMSTB_AVS_CPUFREQ Kconfig entry 2023-03-22 20:14:37 +01:00
Kconfig.powerpc
Kconfig.x86 cpufreq: amd-pstate: Add a kernel config option to set default mode 2023-06-21 18:44:56 +02:00
kirkwood-cpufreq.c cpufreq: kirkwood: Convert to platform remove callback returning void 2023-07-20 16:02:13 +05:30
longhaul.c
longhaul.h
longrun.c
loongson2_cpufreq.c
Makefile Power management updates for 6.3-rc1 2023-02-21 12:13:58 -08:00
maple-cpufreq.c cpufreq: Adjust includes to remove of_device.h 2023-04-13 17:46:35 -05:00
mediatek-cpufreq-hw.c cpufreq: mediatek-hw: Convert to platform remove callback returning void 2023-07-20 16:02:12 +05:30
mediatek-cpufreq.c cpufreq: mediatek-hw: Remove unused define 2023-08-11 06:15:21 +05:30
mvebu-cpufreq.c
omap-cpufreq.c cpufreq: omap: Convert to platform remove callback returning void 2023-07-20 16:02:14 +05:30
p4-clockmod.c
pasemi-cpufreq.c
pcc-cpufreq.c cpufreq: pcc: Fix the potentinal scheduling delays in target_index() 2023-08-29 20:41:29 +02:00
pmac32-cpufreq.c Devicetree updates for v6.4, part 2: 2023-04-27 10:09:05 -07:00
pmac64-cpufreq.c cpufreq: Adjust includes to remove of_device.h 2023-04-13 17:46:35 -05:00
powernow-k6.c
powernow-k7.c
powernow-k7.h
powernow-k8.c cpufreq: powernow-k8: Use related_cpus instead of cpus in driver.exit() 2023-08-28 12:27:30 +05:30
powernow-k8.h
powernv-cpufreq.c
ppc_cbe_cpufreq_pervasive.c
ppc_cbe_cpufreq_pmi.c cpufreq: Explicitly include correct DT includes 2023-07-20 16:01:57 +05:30
ppc_cbe_cpufreq.c cpufreq: Explicitly include correct DT includes 2023-07-20 16:01:57 +05:30
ppc_cbe_cpufreq.h
pxa2xx-cpufreq.c
pxa3xx-cpufreq.c
qcom-cpufreq-hw.c cpufreq: qcom-cpufreq-hw: add support for 4 freq domains 2023-08-23 20:31:08 +05:30
qcom-cpufreq-nvmem.c cpufreq: qcom-nvmem: Convert to platform remove callback returning void 2023-07-20 16:02:13 +05:30
qoriq-cpufreq.c cpufreq: qoriq: Convert to platform remove callback returning void 2023-07-20 16:02:13 +05:30
raspberrypi-cpufreq.c cpufreq: raspberrypi: Convert to platform remove callback returning void 2023-07-20 16:02:13 +05:30
s3c64xx-cpufreq.c
s5pv210-cpufreq.c
sa1110-cpufreq.c
sc520_freq.c
scmi-cpufreq.c cpufreq: Use of_property_present() for testing DT property presence 2023-03-13 09:58:11 +05:30
scpi-cpufreq.c cpufreq: scpi: Convert to platform remove callback returning void 2023-07-20 16:02:12 +05:30
sh-cpufreq.c
sparc-us2e-cpufreq.c cpufreq: sparc: Don't mark cpufreq callbacks with __init 2023-07-12 12:45:18 +02:00
sparc-us3-cpufreq.c cpufreq: sparc: Don't mark cpufreq callbacks with __init 2023-07-12 12:45:18 +02:00
spear-cpufreq.c cpufreq: Adjust includes to remove of_device.h 2023-04-13 17:46:35 -05:00
speedstep-centrino.c
speedstep-ich.c
speedstep-lib.c
speedstep-lib.h
speedstep-smi.c
sti-cpufreq.c cpufreq: Explicitly include correct DT includes 2023-07-20 16:01:57 +05:30
sun50i-cpufreq-nvmem.c cpufreq: sun50i: Convert to platform remove callback returning void 2023-07-20 16:02:12 +05:30
tegra20-cpufreq.c Devicetree updates for v6.4, part 2: 2023-04-27 10:09:05 -07:00
tegra124-cpufreq.c Devicetree updates for v6.4, part 2: 2023-04-27 10:09:05 -07:00
tegra186-cpufreq.c cpufreq: tegra186: Convert to platform remove callback returning void 2023-07-20 16:02:13 +05:30
tegra194-cpufreq.c cpufreq: tegra194: fix warning due to missing opp_put 2023-11-20 11:58:57 +01:00
ti-cpufreq.c cpufreq: Explicitly include correct DT includes 2023-07-20 16:01:57 +05:30
vexpress-spc-cpufreq.c cpufreq: vexpress: Convert to platform remove callback returning void 2023-07-20 16:02:12 +05:30