linux-stable/drivers/staging/r8188eu
Phillip Potter 87f600af59 staging: r8188eu: fix potential uninitialised variable use in rtw_pwrctrl.c
Set ret to 0 (success) before entering first if statement, thereby
assuring that even if the device is not associated and further checks
pass, we do not then end up returning the uninitialized value of ret.
This assignment is deliberately now directly before the if statement, in
order to keep it clear what is happening as opposed to having it as an
initialization at the start of the function like it was originally.

Also add a comment to make it clear this first if block is currently a
success path. As a side note, smatch does not trigger warnings for this
change, for me at least.

Within core/rtw_pwrctrl.c in the rtw_pwr_wakeup function, I previously
dropped the initialization of 'ret' (int ret = 0;) in favour of its
assignment which happens inside the first if block directly before its
corresponding goto. This was the cause of this bug, and was introduced
by: commit f3a76018dd ("staging: r8188eu: remove initializer from ret
in rtw_pwr_wakeup").

Fixes: f3a76018dd ("staging: r8188eu: remove initializer from ret in rtw_pwr_wakeup")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20220730235910.1145-1-phil@philpotter.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-07-31 10:07:45 +02:00
..
core staging: r8188eu: fix potential uninitialised variable use in rtw_pwrctrl.c 2022-07-31 10:07:45 +02:00
hal staging: r8188eu: make dump_chip_info() static 2022-07-27 08:45:22 +02:00
include staging: r8188eu: make dump_chip_info() static 2022-07-27 08:45:22 +02:00
os_dep staging: r8188eu: convert rtw_pwr_wakeup to correct error code semantics 2022-07-27 08:45:32 +02:00
Kconfig
Makefile staging: r8188eu: make power sequences static 2022-06-27 13:51:08 +02:00
TODO