wifi: nxpwifi: zero the channel statistics array

Browse source

adapter->chan_stats comes from vmalloc(), which does not clear the
memory, and nxpwifi_cfg80211_dump_survey() reads it as soon as user
space asks for survey data.  For the entries no scan has filled in, a
non-zero cca_scan_dur passes the validity check and stale bytes are
reported to user space as noise, time and time_busy.

Use kcalloc() instead.  The array holds two entries per supported
channel, small enough not to need vmalloc(), and the two callers change
to kfree() accordingly.

mwifiex fixed the same issue in commit 0e20450829 ("wifi: mwifiex:
Initialize the chan_stats array to zero").

Fixes: 73b01e57ed ("wifi: nxp: add nxpwifi driver for IW61x")
Signed-off-by: Linmao Li <lilinmao@kylinos.cn>
Reviewed-by: Jeff Chen <jeff.chen_1@nxp.com>
Signed-off-by: Jeff Chen <jeff.chen_1@nxp.com>

...

This commit is contained in:

Linmao Li 2026-08-13 16:23:15 +08:00 • committed by Jeff Chen

parent d68d6d8d8b

commit 050f03bb0e

2 changed files with 5 additions and 4 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

5

drivers/net/wireless/nxp/nxpwifi/cfg80211.c

View file

4

drivers/net/wireless/nxp/nxpwifi/main.c

View file