From: Chris Bainbridge Date: Wed, 27 Jan 2016 15:46:18 +0000 (+0000) Subject: mac80211: fix use of uninitialised values in RX aggregation X-Git-Tag: v3.2.79~57 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=ff452c63c02a683eaeb63174625c74010cdeda5b mac80211: fix use of uninitialised values in RX aggregation commit f39ea2690bd61efec97622c48323f40ed6e16317 upstream. Use kzalloc instead of kmalloc for struct tid_ampdu_rx to initialize the "removed" field (all others are initialized manually). That fixes: UBSAN: Undefined behaviour in net/mac80211/rx.c:932:29 load of value 2 is not a valid value for type '_Bool' CPU: 3 PID: 1134 Comm: kworker/u16:7 Not tainted 4.5.0-rc1+ #265 Workqueue: phy0 rt2x00usb_work_rxdone 0000000000000004 ffff880254a7ba50 ffffffff8181d866 0000000000000007 ffff880254a7ba78 ffff880254a7ba68 ffffffff8188422d ffffffff8379b500 ffff880254a7bab8 ffffffff81884747 0000000000000202 0000000348620032 Call Trace: [] dump_stack+0x45/0x5f [] ubsan_epilogue+0xd/0x40 [] __ubsan_handle_load_invalid_value+0x67/0x70 [] ieee80211_sta_reorder_release.isra.16+0x5ed/0x730 [] ieee80211_prepare_and_rx_handle+0xd04/0x1c00 [] __ieee80211_rx_handle_packet+0x1f3/0x750 [] ieee80211_rx_napi+0x447/0x990 While at it, convert to use sizeof(*tid_agg_rx) instead. Fixes: 788211d81bfdf ("mac80211: fix RX A-MPDU session reorder timer deletion") Signed-off-by: Chris Bainbridge [reword commit message, use sizeof(*tid_agg_rx)] Signed-off-by: Johannes Berg Signed-off-by: Ben Hutchings --- diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c index 6174785fe9f3..635fa804fc3b 100644 --- a/net/mac80211/agg-rx.c +++ b/net/mac80211/agg-rx.c @@ -280,7 +280,7 @@ void ieee80211_process_addba_request(struct ieee80211_local *local, } /* prepare A-MPDU MLME for Rx aggregation */ - tid_agg_rx = kmalloc(sizeof(struct tid_ampdu_rx), GFP_KERNEL); + tid_agg_rx = kzalloc(sizeof(*tid_agg_rx), GFP_KERNEL); if (!tid_agg_rx) goto end;