On Wed, 17 Dec 2025 at 21:58, Marek Vasut <[email protected]> wrote: > > Avoid NULL pointer dereference in case 'env select' is invoked > without parameters, check the arg count and make sure it is at > least 2, otherwise print usage. > > The crash is easy to trigger e.g. in sandbox: > $ ./u-boot -Tc "env select" > > Fixes: a97d22ebba23 ("cmd: env: add env select command") > Signed-off-by: Marek Vasut <[email protected]> > ---
Reviewed-by: Ilias Apalodimas <[email protected]> > Cc: Heinrich Schuchardt <[email protected]> > Cc: Ilias Apalodimas <[email protected]> > Cc: Patrick Delaunay <[email protected]> > Cc: Tom Rini <[email protected]> > Cc: Vincent Stehlé <[email protected]> > Cc: [email protected] > --- > cmd/nvedit.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/cmd/nvedit.c b/cmd/nvedit.c > index 11c3cea882b..636bddee1be 100644 > --- a/cmd/nvedit.c > +++ b/cmd/nvedit.c > @@ -499,6 +499,9 @@ static int do_env_load(struct cmd_tbl *cmdtp, int flag, > int argc, > static int do_env_select(struct cmd_tbl *cmdtp, int flag, int argc, > char *const argv[]) > { > + if (argc < 2) > + return CMD_RET_USAGE; > + > return env_select(argv[1]) ? 1 : 0; > } > #endif > -- > 2.51.0 >
