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96cfe05051
of_parse_thermal_zones() parses the thermal-zones node and registers a thermal_zone device for each subnode. However, if a thermal zone is consuming a thermal sensor and that thermal sensor device hasn't probed yet, an attempt to set trip_point_*_temp for that thermal zone device can cause a NULL pointer dereference. Fix it. console:/sys/class/thermal/thermal_zone87 # echo 120000 > trip_point_0_temp ... Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020 ... Call trace: of_thermal_set_trip_temp+0x40/0xc4 trip_point_temp_store+0xc0/0x1dc dev_attr_store+0x38/0x88 sysfs_kf_write+0x64/0xc0 kernfs_fop_write_iter+0x108/0x1d0 vfs_write+0x2f4/0x368 ksys_write+0x7c/0xec __arm64_sys_write+0x20/0x30 el0_svc_common.llvm.7279915941325364641+0xbc/0x1bc do_el0_svc+0x28/0xa0 el0_svc+0x14/0x24 el0_sync_handler+0x88/0xec el0_sync+0x1c0/0x200 While at it, fix the possible NULL pointer dereference in other functions as well: of_thermal_get_temp(), of_thermal_set_emul_temp(), of_thermal_get_trend(). Suggested-by: David Collins <quic_collinsd@quicinc.com> Signed-off-by: Subbaraman Narayanamurthy <quic_subbaram@quicinc.com> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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.. | ||
broadcom | ||
intel | ||
qcom | ||
samsung | ||
st | ||
tegra | ||
ti-soc-thermal | ||
amlogic_thermal.c | ||
armada_thermal.c | ||
cpufreq_cooling.c | ||
cpuidle_cooling.c | ||
da9062-thermal.c | ||
db8500_thermal.c | ||
devfreq_cooling.c | ||
dove_thermal.c | ||
gov_bang_bang.c | ||
gov_fair_share.c | ||
gov_power_allocator.c | ||
gov_step_wise.c | ||
gov_user_space.c | ||
hisi_thermal.c | ||
imx8mm_thermal.c | ||
imx_sc_thermal.c | ||
imx_thermal.c | ||
k3_bandgap.c | ||
Kconfig | ||
khadas_mcu_fan.c | ||
kirkwood_thermal.c | ||
Makefile | ||
max77620_thermal.c | ||
mtk_thermal.c | ||
qoriq_thermal.c | ||
rcar_gen3_thermal.c | ||
rcar_thermal.c | ||
rockchip_thermal.c | ||
spear_thermal.c | ||
sprd_thermal.c | ||
sun8i_thermal.c | ||
thermal-generic-adc.c | ||
thermal_core.c | ||
thermal_core.h | ||
thermal_helpers.c | ||
thermal_hwmon.c | ||
thermal_hwmon.h | ||
thermal_mmio.c | ||
thermal_netlink.c | ||
thermal_netlink.h | ||
thermal_of.c | ||
thermal_sysfs.c | ||
uniphier_thermal.c |