Seth/kernel_amazon_mt8127-common
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mac80211: fix crash if bitrate calculation goes wrong

Browse Source 
commit d86aa4f8ca58898ec6a94c0635da20b948171ed7 upstream.

If a frame's timestamp is calculated, and the bitrate
calculation goes wrong and returns zero, the system
will attempt to divide by zero and crash. Catch this
case and print the rate information that the driver
reported when this happens.

Reported-by: Thomas Lindroth <thomas.lindroth@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johannes Berg
2013-10-11 15:47:06 +02:00
committed by Greg Kroah-Hartman
parent 31da12cec6
commit 0b1621f623
1 changed files with 4 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
net/mac80211/util.c
+4
View File
@@ -2174,6 +2174,10 @@ u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
}
rate = cfg80211_calculate_bitrate(&ri);
if (WARN_ONCE(!rate,
"Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
status->flag, status->rate_idx, status->vht_nss))
return 0;
/* rewind from end of MPDU */
if (status->flag & RX_FLAG_MACTIME_END)