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| author | Chris Bainbridge <chris.bainbridge@gmail.com> | 2016-01-27 15:46:18 +0000 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2016-01-29 17:13:44 +0100 |
| commit | f39ea2690bd61efec97622c48323f40ed6e16317 (patch) | |
| tree | dea03aaf4fecbfec45cb2e0ac4037cbb6b2aa464 /net/mac80211 | |
| parent | cb150b9d23be6ee7f3a0fff29784f1c5b5ac514d (diff) | |
| download | lwn-f39ea2690bd61efec97622c48323f40ed6e16317.tar.gz lwn-f39ea2690bd61efec97622c48323f40ed6e16317.zip | |
mac80211: fix use of uninitialised values in RX aggregation
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:
[<ffffffff8181d866>] dump_stack+0x45/0x5f
[<ffffffff8188422d>] ubsan_epilogue+0xd/0x40
[<ffffffff81884747>] __ubsan_handle_load_invalid_value+0x67/0x70
[<ffffffff82227b4d>] ieee80211_sta_reorder_release.isra.16+0x5ed/0x730
[<ffffffff8222ca14>] ieee80211_prepare_and_rx_handle+0xd04/0x1c00
[<ffffffff8222db03>] __ieee80211_rx_handle_packet+0x1f3/0x750
[<ffffffff8222e4a7>] 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")
Cc: stable@vger.kernel.org
Signed-off-by: Chris Bainbridge <chris.bainbridge@gmail.com>
[reword commit message, use sizeof(*tid_agg_rx)]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/agg-rx.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c index 10ad4ac1fa0b..367784be5df2 100644 --- a/net/mac80211/agg-rx.c +++ b/net/mac80211/agg-rx.c @@ -291,7 +291,7 @@ void __ieee80211_start_rx_ba_session(struct sta_info *sta, } /* 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; |