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linux/net/wireless
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Johannes Berg a78748b4a7 cfg80211: limit scan results cache size 
commit 9853a55ef1 upstream.

It's possible to make scanning consume almost arbitrary amounts
of memory, e.g. by sending beacon frames with random BSSIDs at
high rates while somebody is scanning.

Limit the number of BSS table entries we're willing to cache to
1000, limiting maximum memory usage to maybe 4-5MB, but lower
in practice - that would be the case for having both full-sized
beacon and probe response frames for each entry; this seems not
possible in practice, so a limit of 1000 entries will likely be
closer to 0.5 MB.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
History 2017-02-23 03:54:37 +00:00
..
.gitignore wireless: support internal statically compiled regulatory database 2009-12-21 18:56:10 -05:00
ap.c cfg80211: export interface stopping function 2014-05-06 15:16:34 +02:00
chan.c cfg80211: Fix 160 MHz channels with 80+80 and 160 MHz drivers 2015-01-15 10:44:02 +00:00
core.c cfg80211/wext: fix message ordering 2016-03-24 10:01:07 +00:00
core.h cfg80211: limit scan results cache size 2017-02-23 03:54:37 +00:00
db.txt wireless: support internal statically compiled regulatory database 2009-12-21 18:56:10 -05:00
debugfs.c mac80211: fix some snprintf misuses 2013-10-01 12:16:51 +02:00
debugfs.h cfg80211/mac80211: use debugfs_remove_recursive 2009-10-30 16:49:18 -04:00
ethtool.c cfg80211: change wiphy_to_dev function name 2014-04-25 17:33:04 +02:00
ethtool.h net/wireless/ethtool.h: drop unnecessary include of linux/ethtool.h 2009-10-07 16:39:49 -04:00
genregdb.awk regdb: Generalize the mW to dBm power conversion 2014-05-27 17:58:58 +02:00
ibss.c cfg80211: constify more pointers in the cfg80211 API 2014-05-19 17:53:16 +02:00
Kconfig cfg80211: Enable GO operation on additional channels 2014-04-09 10:55:34 +02:00
lib80211.c lib80211: remove exports for functions not called by other modules 2011-08-09 15:42:36 -04:00
lib80211_crypt_ccmp.c hostap: Don't use create_proc_read_entry() 2013-04-29 15:41:56 -04:00
lib80211_crypt_tkip.c hostap: Don't use create_proc_read_entry() 2013-04-29 15:41:56 -04:00
lib80211_crypt_wep.c hostap: Don't use create_proc_read_entry() 2013-04-29 15:41:56 -04:00
Makefile cfg80211: add tracing to rdev-ops 2012-10-18 10:53:37 +02:00
mesh.c cfg80211: export interface stopping function 2014-05-06 15:16:34 +02:00
mlme.c cfg80211: change wiphy_to_dev function name 2014-04-25 17:33:04 +02:00
nl80211.c nl80211: validate number of probe response CSA counters 2016-11-20 01:17:26 +00:00
nl80211.h cfg80211: send events when devices are added/removed 2014-05-26 13:52:25 +02:00
radiotap.c radiotap: fix bitmap-end-finding buffer overrun 2013-12-16 12:06:43 +01:00
rdev-ops.h cfg80211: implement cfg80211_get_station cfg80211 API 2014-05-21 09:15:17 +02:00
reg.c cfg80211: don't WARN about two consecutive Country IE hint 2015-01-15 10:44:04 +00:00
reg.h cfg80211: Enable GO operation on indoor channels 2014-04-09 10:55:37 +02:00
regdb.h cfg80211: relicense reg.c reg.h and genregdb.awk to ISC 2012-01-04 14:30:41 -05:00
scan.c cfg80211: limit scan results cache size 2017-02-23 03:54:37 +00:00
sme.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next 2014-05-22 13:58:36 -04:00
sysfs.c net: wireless: convert class code to use dev_groups 2013-07-25 16:34:40 -07:00
sysfs.h net: misc: Remove extern from function prototypes 2013-10-19 19:12:11 -04:00
trace.c cfg80211: add tracing to rdev-ops 2012-10-18 10:53:37 +02:00
trace.h cfg80211: fix mic_failure tracing 2014-07-18 09:53:56 +02:00
util.c cfg80211: ignore netif running state when changing iftype 2015-07-15 10:01:22 +01:00
wext-compat.c cfg80211: wext: clear sinfo struct before calling driver 2015-06-30 17:15:23 +01:00
wext-compat.h cfg80211: remove unused wiphy argument from cfg80211_wext_freq() 2014-04-10 10:06:19 +02:00
wext-core.c cfg80211/wext: fix message ordering 2016-03-24 10:01:07 +00:00
wext-priv.c wext: fix potential private ioctl memory content leak 2010-09-20 13:41:40 -04:00
wext-proc.c net: proc: change proc_net_remove to remove_proc_entry 2013-02-18 14:53:08 -05:00
wext-sme.c cfg80211: change wiphy_to_dev function name 2014-04-25 17:33:04 +02:00
wext-spy.c wireless: Convert compare_ether_addr to ether_addr_equal 2012-05-09 20:49:19 -04:00