diff options
| author |   Nadezda Lutovinova <lutovinova@ispras.ru> | 2021-09-21 18:51:51 +0300 |
|---|---|---|
| committer |   Guenter Roeck <linux@roeck-us.net> | 2021-10-02 05:11:52 -0700 |
| commit | 943c15ac1b84d378da26bba41c83c67e16499ac4 (patch) | |
| tree | 891425f6c23321e3fc4f0e3efc85b494e460f17e /drivers/hwmon/w83793.c | |
| parent | hwmon: (pmbus/mp2975) Add missed POUT attribute for page 1 mp2975 controller (diff) | |
| download | linux-dev-943c15ac1b84d378da26bba41c83c67e16499ac4.tar.xz linux-dev-943c15ac1b84d378da26bba41c83c67e16499ac4.zip | |
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_detect_subclients().
The patch fixes possible NULL pointer dereference by removing lm75[].
Found by Linux Driver Verification project (linuxtesting.org).
Cc: stable@vger.kernel.org
Signed-off-by: Nadezda Lutovinova <lutovinova@ispras.ru>
Link: https://lore.kernel.org/r/20210921155153.28098-1-lutovinova@ispras.ru
[groeck: Dropped unnecessary continuation lines, fixed multi-line alignment]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/w83793.c')
0 files changed, 0 insertions, 0 deletions