wifi: p54: validate curve data length in the calibration curve converters

Browse source

p54_convert_rev0() and p54_convert_rev1() read calibration curve
data from the device-supplied EEPROM entry using channel and
points-per-channel counts taken verbatim from that same entry, so
an entry that declares more data than it carries drives an
out-of-bounds read past the EEPROM buffer (verified with a KASAN
reproducer of the conversion loop). The sibling converters
p54_convert_output_limits() and p54_convert_db() already validate
their counts against the entry length; this path was missed.

Reject the entry when the counts do not fit in the entry data.

Fixes: eff1a59c48 ("[P54]: add mac80211-based driver for prism54 softmac hardware")
Cc: stable@vger.kernel.org
Assisted-by: GLM:5.3
Signed-off-by: Shengzhuo Wei <me@cherr.cc>
Link: https://patch.msgid.link/20260831-p54-pda-validation-v2-1-dae566b388c8@cherr.cc
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

...

This commit is contained in:

Shengzhuo Wei 2026-08-31 02:42:12 +08:00 • committed by Johannes Berg

parent c46cfaf8db

commit ce858fa6b8

1 changed files with 15 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

19

drivers/net/wireless/intersil/p54/eeprom.c

View file