From: Johannes Berg <johannes@xxxxxxxxxxxxxxxx> Date: Wed, 19 Jun 2013 10:23:58 +0200 > From: Johannes Berg <johannes.berg@xxxxxxxxx> > > Since my commit 3713b4e364, nl80211_dump_wiphy() uses the global > nl80211_fam.attrbuf for parsing the incoming data. This wouldn't > be a problem if it only did so on the first dump iteration which > is locked against other commands in generic netlink, but due to > space constraints in cb->args (the needed state doesn't fit) I > decided to always parse the original message. That's racy though > since nl80211_fam.attrbuf could be used by some other parsing in > generic netlink concurrently. > > For now, fix this by allocating a separate parse buffer (it's a > bit too big for the stack, currently 1448 bytes on 64-bit). For > -next, I'll change the code to parse into the global buffer in > the first round only and then allocate a smaller buffer to keep > the state in cb->args. > > Reported-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> Acked-by: David S. Miller <davem@xxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
