4.19-stable review patch. If anyone has any objections, please let me know.
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From: Zhang Rui rui.zhang@intel.com
[ Upstream commit 4e440abc894585a34c2904a32cd54af1742311b3 ]
Fix a bug that pdata->cpu_map[] is set before out-of-bounds check. The problem might be triggered on systems with more than 128 cores per package.
Fixes: 7108b80a542b ("hwmon/coretemp: Handle large core ID value") Signed-off-by: Zhang Rui rui.zhang@intel.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20240202092144.71180-2-rui.zhang@intel.com Signed-off-by: Guenter Roeck linux@roeck-us.net Stable-dep-of: fdaf0c8629d4 ("hwmon: (coretemp) Fix bogus core_id to attr name mapping") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/hwmon/coretemp.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c index 33371f7a4c0f..6832569c9bac 100644 --- a/drivers/hwmon/coretemp.c +++ b/drivers/hwmon/coretemp.c @@ -480,18 +480,14 @@ static int create_core_data(struct platform_device *pdev, unsigned int cpu, if (pkg_flag) { attr_no = PKG_SYSFS_ATTR_NO; } else { - index = ida_alloc(&pdata->ida, GFP_KERNEL); + index = ida_alloc_max(&pdata->ida, NUM_REAL_CORES - 1, GFP_KERNEL); if (index < 0) return index; + pdata->cpu_map[index] = topology_core_id(cpu); attr_no = index + BASE_SYSFS_ATTR_NO; }
- if (attr_no > MAX_CORE_DATA - 1) { - err = -ERANGE; - goto ida_free; - } - tdata = init_temp_data(cpu, pkg_flag); if (!tdata) { err = -ENOMEM;