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authorJohannes Berg <johannes.berg@intel.com>2018-04-03 14:33:49 +0200
committerJohannes Berg <johannes.berg@intel.com>2018-04-19 15:46:34 +0200
commita7cfebcb7594a24609268f91299ab85ba064bf82 (patch)
tree0d478a1526a6954b58dc0e9204eaa40591eaffdb /net/wireless/sysfs.c
parentmac80211: Fix condition validating WMM IE (diff)
downloadlinux-a7cfebcb7594a24609268f91299ab85ba064bf82.tar.xz
linux-a7cfebcb7594a24609268f91299ab85ba064bf82.zip
cfg80211: limit wiphy names to 128 bytes
There's currently no limit on wiphy names, other than netlink message size and memory limitations, but that causes issues when, for example, the wiphy name is used in a uevent, e.g. in rfkill where we use the same name for the rfkill instance, and then the buffer there is "only" 2k for the environment variables. This was reported by syzkaller, which used a 4k name. Limit the name to something reasonable, I randomly picked 128. Reported-by: syzbot+230d9e642a85d3fec29c@syzkaller.appspotmail.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/sysfs.c')
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