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Change History

In the Linux kernel, the following vulnerability has been resolved:

hwmon: (w83791d) Fix NULL pointer dereference by removing unnecessary structure field

If driver read val value sufficient for
(val & 0x08) && (!(val & 0x80)) && ((val & 0x7) == ((val >> 4) & 0x7))
from device then Null pointer dereference occurs.
(It is possible if tmp = 0b0xyz1xyz, where same literals mean same numbers)
Also lm75[] does not serve a purpose anymore after switching to
devm_i2c_new_dummy_device() in w83791d_dete

kernel.org https://git.kernel.org/stable/c/16887ae4e3defd2c4e7913b6c539f33eaf4eac5c [No types assigned]

kernel.org https://git.kernel.org/stable/c/44d3c480e4e2a75bf6296a18b4356157991ccd80 [No types assigned]

kernel.org https://git.kernel.org/stable/c/516d9055039017a20a698103be2b556b4c976bb8 [No types assigned]

kernel.org https://git.kernel.org/stable/c/943c15ac1b84d378da26bba41c83c67e16499ac4 [No types assigned]