ACPI: battery: Sanitise model_number by dropping unprintable characters

Browse source

The battery Embedded Controller (EC) may return the model name with
trailing unprintable or non-ASCII characters. For example, on some
systems:

$ cat /sys/class/power_supply/BAT0/model_name
LNV-5B10W51864��

If a non-ASCII or an unprintable character is found, it will be
replaced with '\0' to ensure the model_number is a valid string.

If left intact, the malformed string prevents udev rules and hwdb
working correctly.

Link: https://gitlab.freedesktop.org/upower/upower/-/work_items/345
Signed-off-by: Kate Hsuan <hpa@redhat.com>
Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
[ rjw: Subject tweak ]
Link: https://patch.msgid.link/20260710125122.1621877-1-hpa@redhat.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

...

This commit is contained in:

Kate Hsuan 2026-07-10 20:51:22 +08:00 • committed by Rafael J. Wysocki

parent 1590cf0329

commit 6587dd8759

1 changed files with 14 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

14

drivers/acpi/battery.c

View file