net: wireless: nl80211: fix out-of-bounds access in nl80211_del_key()
commit 3dc289f8 upstream. In nl80211_parse_key(), key.idx is first initialized as -1. If this value of key.idx remains unmodified and gets returned, and nl80211_key_allowed() also returns 0, then rdev_del_key() gets called with key.idx = -1. This causes an out-of-bounds array access. Handle this issue by checking if the value of key.idx after nl80211_parse_key() is called and return -EINVAL if key.idx < 0. Cc: stable@vger.kernel.org Reported-by:<syzbot+b1bb342d1d097516cbda@syzkaller.appspotmail.com> Tested-by:
<syzbot+b1bb342d1d097516cbda@syzkaller.appspotmail.com> Signed-off-by:
Anant Thazhemadam <anant.thazhemadam@gmail.com> Link: https://lore.kernel.org/r/20201007035401.9522-1-anant.thazhemadam@gmail.com Signed-off-by:
Johannes Berg <johannes.berg@intel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
30386c13
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