thermal: testing: reject missing command arguments

The thermal testing debugfs command parser splits commands at ':' and
passes the right-hand side to the command implementation. Commands such
as deltz, tzaddtrip, tzreg, and tzunreg require a zone id, but writing
one of those command names without ':' leaves the argument pointer NULL.

The command implementations parse the id with sscanf(arg, "%d", ...), so
the missing-argument form dereferences a NULL pointer from the debugfs
write path.

Reject missing arguments in tt_command_exec() before calling handlers
that require an id.

Fixes: f6a034f2df42 ("thermal: Introduce a debugfs-based testing facility")
Assisted-by: Codex:gpt-5.5-cyber-preview
Signed-off-by: Samuel Moelius <sam.moelius@trailofbits.com>
Link: https://patch.msgid.link/20260605185212.2491144-1-sam.moelius@trailofbits.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

0 files changed, 0 insertions, 0 deletions