This is a note to let you know that I've just added the patch titled
ipw2x00: potential buffer overflow in libipw_wx_set_encodeext()
to the 5.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ipw2x00-potential-buffer-overflow-in-libipw_wx_set_encodeext.patch
and it can be found in the queue-5.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 260a9ad9446723d4063ed802989758852809714d Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date: Wed, 14 Apr 2021 11:29:55 +0300
Subject: ipw2x00: potential buffer overflow in libipw_wx_set_encodeext()
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
commit 260a9ad9446723d4063ed802989758852809714d upstream.
The "ext->key_len" is a u16 that comes from the user. If it's over
SCM_KEY_LEN (32) that could lead to memory corruption.
Fixes: e0d369d1d969 ("[PATCH] ieee82011: Added WE-18 support to default wireless extension handler")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Acked-by: Stanislav Yakovlev <stas.yakovlev@xxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/YHaoA1i+8uT4ir4h@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/intel/ipw2x00/libipw_wx.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/net/wireless/intel/ipw2x00/libipw_wx.c
+++ b/drivers/net/wireless/intel/ipw2x00/libipw_wx.c
@@ -633,8 +633,10 @@ int libipw_wx_set_encodeext(struct libip
}
if (ext->alg != IW_ENCODE_ALG_NONE) {
- memcpy(sec.keys[idx], ext->key, ext->key_len);
- sec.key_sizes[idx] = ext->key_len;
+ int key_len = clamp_val(ext->key_len, 0, SCM_KEY_LEN);
+
+ memcpy(sec.keys[idx], ext->key, key_len);
+ sec.key_sizes[idx] = key_len;
sec.flags |= (1 << idx);
if (ext->alg == IW_ENCODE_ALG_WEP) {
sec.encode_alg[idx] = SEC_ALG_WEP;
Patches currently in stable-queue which might be from dan.carpenter@xxxxxxxxxx are
queue-5.12/ipw2x00-potential-buffer-overflow-in-libipw_wx_set_encodeext.patch
queue-5.12/cfg80211-scan-drop-entry-from-hidden_list-on-overflow.patch
queue-5.12/iio-magnetometer-yas530-fix-return-value-on-error-path.patch
