On Tue, Oct 21, 2008 at 09:01:14AM -0700, Larry Finger wrote:
> On my x86_64 system, the mainline 2.6.27-git kernel (v2.6.27-6030-g6da0b38)
> shows the following anomaly with the 'iwlist scan' command:
>
> Cell 03 - Address: 00:14:BF:85:49:FA
> ESSID:"lwfdjf"
> Mode:Master
> Channel:1
> Frequency:2.412 GHz (Channel 1)
> Quality=66/100 Signal level:-62 dBm Noise level=-68 dBm
> Encryption key:on
> IE: Unknown: 00066C7766646A66
> IE: Unknown: 010882848B962430486C
> IE: Unknown: 030101
> IE: Unknown: 2A0104
> IE: Unknown: 2F0104
> IE: Unknown: 32040C121860
> IE: Unknown: DD09001018020014000000
> IE: WPA Version 1
> Group Cipher : TKIP
> Pairwise Ciphers (1) : TKIP
> Authentication Suites (1) : PSK
> Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
> 24 Mb/s; 36 Mb/s; 54 Mb/s; 6 Mb/s; 9 Mb/s
> 12 Mb/s; 48 Mb/s
> Extra:tsf=0000014488aeb18b
> Extra: Last beacon: 448ms ago
>
> This problem was bisected to commit 43ac2ca3840f64f699a239535c590fa7ebaaac27,
> entitled "mac80211: Handle scan result IEs in one block". The same bug is
> present in the wireless-testing tree.
I'm guessing that iwlist doesn't like the packed IEs? Does this patch help?
John
P.S. I'm not sure if this qualifies as actual userland breakage or not...
---
From: John W. Linville <linville@xxxxxxxxxxxxx>
Subject: [PATCH] mac80211: do not aggregate IEs from scan results
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
---
net/mac80211/scan.c | 2 --
1 files changed, 0 insertions(+), 2 deletions(-)
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 416bb41..51ed74d 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -728,8 +728,6 @@ static void ieee80211_scan_add_ies(struct iw_request_info *info,
while (end - pos > IW_GENERIC_IE_MAX) {
next = pos + 2 + pos[1];
- while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX)
- next = next + 2 + next[1];
memset(&iwe, 0, sizeof(iwe));
iwe.cmd = IWEVGENIE;
--
1.5.4.3
--
John W. Linville Linux should be at the core
linville@xxxxxxxxxxxxx of your literate lifestyle.
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