dm-unstripe accepts a stripe index that is equal to the number of configured stripes. Valid indexes are zero based, so that value is one past the last stripe.
The out-of-range value can later be used in mapping calculations and describe a stripe that does not exist. Reject stripe indexes greater than or equal to the configured stripe count. Assisted-by: Codex:gpt-5.5-cyber-preview Signed-off-by: Samuel Moelius <[email protected]> --- drivers/md/dm-unstripe.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/md/dm-unstripe.c b/drivers/md/dm-unstripe.c index bfcbe6bfa71a..b1a8ec69ccad 100644 --- a/drivers/md/dm-unstripe.c +++ b/drivers/md/dm-unstripe.c @@ -69,8 +69,8 @@ static int unstripe_ctr(struct dm_target *ti, unsigned int argc, char **argv) goto err; } - if (uc->unstripe > uc->stripes && uc->stripes > 1) { - ti->error = "Please provide stripe between [0, # of stripes]"; + if (uc->unstripe >= uc->stripes) { + ti->error = "Invalid stripe number"; goto err; } -- 2.43.0
