[ONE Original Android Development] ak:
this isnt a kernel problem:

[20569.546373] msm_thermal:do_freq_control Limiting CPU0 max frequency to 2572800. Temp:70 [20569.546548] msm_thermal:do_freq_control Limiting CPU1 max frequency to 2572800. Temp:70 [20569.546693] msm_thermal:do_freq_control Limiting CPU2 max frequency to 2572800. Temp:70 [20569.547036] msm_thermal:do_freq_control Limiting CPU3 max frequency to 2572800. Temp:70 [20569.796346] msm_thermal:do_freq_control Limiting CPU0 max frequency to 2419200. Temp:76 [20569.796533] msm_thermal:do_freq_control Limiting CPU1 max frequency to 2419200. Temp:76 [20569.796666] msm_thermal:do_freq_control Limiting CPU2 max frequency to 2419200. Temp:76 [20569.796798] msm_thermal:do_freq_control Limiting CPU3 max frequency to 2419200. Temp:76 [20570.046360] msm_thermal:do_freq_control Limiting CPU0 max frequency to 2265600. Temp:76 [20570.046559] msm_thermal:do_freq_control Limiting CPU1 max frequency to 2265600. Temp:76 [20570.046691] msm_thermal:do_freq_control Limiting CPU2 max frequency to 2265600. Temp:76 [20570.046786] msm_thermal:do_freq_control Limiting CPU3 max frequency to 2265600. Temp:76 [20570.296348] msm_thermal:do_freq_control Limiting CPU0 max frequency to 1728000. Temp:71 [20570.296538] msm_thermal:do_freq_control Limiting CPU1 max frequency to 1728000. Temp:71 [20570.296644] msm_thermal:do_freq_control Limiting CPU2 max frequency to 1728000. Temp:71 [20570.296747] msm_thermal:do_freq_control Limiting CPU3 max frequency to 1728000. Temp:71 [20571.046344] msm_thermal:do_freq_control Limiting CPU0 max frequency to 2265600. Temp:64 [20571.046453] msm_thermal:do_freq_control Limiting CPU1 max frequency to 2265600. Temp:64 [20571.046508] msm_thermal:do_freq_control Limiting CPU2 max frequency to 2265600. Temp:64 [20571.046603] msm_thermal:do_freq_control Limiting CPU3 max frequency to 2265600. Temp:64 [20571.296405] msm_thermal:do_freq_control Limiting CPU0 max frequency to 2419200. Temp:64 [20571.296475] msm_thermal:do_freq_control Limiting CPU1 max frequency to 2419200. Temp:64 [20571.296568] msm_thermal:do_freq_control Limiting CPU2 max frequency to 2419200. Temp:64 [20571.296661] msm_thermal:do_freq_control Limiting CPU3 max frequency to 2419200. Temp:64 [20571.796368] msm_thermal:do_freq_control Limiting CPU0 max frequency to 2572800. Temp:64 [20571.796516] msm_thermal:do_freq_control Limiting CPU1 max frequency to 2572800. Temp:64 [20571.796732] msm_thermal:do_freq_control Limiting CPU2 max frequency to 2572800. Temp:64 [20571.796941] msm_thermal:do_freq_control Limiting CPU3 max frequency to 2572800. Temp:64 [20572.046361] msm_thermal:do_freq_control Limiting CPU0 max frequency to 2880000. Temp:62 [20572.046490] msm_thermal:do_freq_control Limiting CPU1 max frequency to 2880000. Temp:62 [20572.046593] msm_thermal:do_freq_control Limiting CPU2 max frequency to 2880000. Temp:62 [20572.046685] msm_thermal:do_freq_control Limiting CPU3 max frequency to 2880000. Temp:62 [20572.546348] msm_thermal:do_freq_control Limiting CPU0 max frequency to 2572800. Temp:70 [20572.546457] msm_thermal:do_freq_control Limiting CPU1 max frequency to 2572800. Temp:70 [20572.546543] msm_thermal:do_freq_control Limiting CPU2 max frequency to 2572800. Temp:70 [20572.546606] msm_thermal:do_freq_control Limiting CPU3 max frequency to 2572800. Temp:70

your phone reboot because you have reached a critical point.