[PATCH] common: cli_hush: fix console_buffer overflow on boot retry

[Rasmus Villemoes]

On Tue, Apr 21 2026, Ngo Luong Thanh Tra <ngotra27101996 at gmail.com> wrote:

> Add const_strcpy() macro to linux/build_bug.h that enforces at
> compile time that the destination is a writable char array (not char *
> or const char *), the source is a string literal, and the source fits
> in the destination including the NUL terminator.
>
> Fix the console_buffer extern declaration in console.h to include the
> array size so sizeof(console_buffer) is valid at call sites.
>
> Replace unbounded strcpy() in cli_hush.c with const_strcpy().
>
> Fixes: 657e19f8f2dd ("cli_hush: support running bootcmd on boot retry")
>
> Changes in v4:
> - Rebased on top of current master (as requested by Tom Rini)
>
> Changes in v3:
> - Reject const char * destinations in const_strcpy() (Simon Glass)
>
> Signed-off-by: Ngo Luong Thanh Tra <S4210155 at student.rmit.edu.au>
> ---


Hi Ngo

Please address the feedback I gave in
https://lore.kernel.org/u-boot/87zf3co6pz.fsf@prevas.dk/.

Also, two things on creating patches:

When you create a new version of a patch (or patch series), please use
"git format-patch -vX" where X is the version number. For the next one
that would be "-v5". Then git will use the subject prefix "[PATCH v5]"
instead of merely "[PATCH]", making it easier to distinguish the
different ones in one's inbox or on lore.kernel.org/u-boot.

Second, the informative "Changes in vX:" stuff should go below the ---,
as it is not part of the commit message and should not be part of the
permanent git history once the patch is accepted.

Rasmus