On Mon, Aug 05, 2019 at 02:35:13PM +0900, Masahiro Yamada wrote:
> From: "M. Vefa Bicakci" <m.v.b@xxxxxxxxxx>
>
> commit 0c5b6c28ed68becb692b43eae5e44d5aa7e160ce upstream.
>
> Prior to this commit, starting nconfig, xconfig or gconfig, and saving
> the .config file more than once caused data loss, where a .config file
> that contained only comments would be written to disk starting from the
> second save operation.
>
> This bug manifests itself because the SYMBOL_WRITTEN flag is never
> cleared after the first call to conf_write, and subsequent calls to
> conf_write then skip all of the configuration symbols due to the
> SYMBOL_WRITTEN flag being set.
>
> This commit resolves this issue by clearing the SYMBOL_WRITTEN flag
> from all symbols before conf_write returns.
>
> Fixes: 8e2442a5f86e ("kconfig: fix missing choice values in auto.conf")
> Cc: linux-stable <stable@xxxxxxxxxxxxxxx> # 4.19+
> Signed-off-by: M. Vefa Bicakci <m.v.b@xxxxxxxxxx>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
> ---
> scripts/kconfig/confdata.c | 4 ++++
> 1 file changed, 4 insertions(+)
5.1.y is end-of-life, so no need for this backport.
thanks,
greg k-h
