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| author | Felix Fietkau <nbd@openwrt.org> | 2016-01-29 14:23:23 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2016-01-29 14:23:23 +0000 |
| commit | a6fe27a59ae41df3fdf048de8d09451484e6a8db (patch) | |
| tree | ce6bfda13060c8c05072408b249b4bae505d9788 | |
| parent | 6fd5449198d81342869951480d793d9fd95de9e0 (diff) | |
| download | upstream-a6fe27a59ae41df3fdf048de8d09451484e6a8db.tar.gz upstream-a6fe27a59ae41df3fdf048de8d09451484e6a8db.tar.bz2 upstream-a6fe27a59ae41df3fdf048de8d09451484e6a8db.zip | |
mac80211: fix an out of bounds access issue in minstrel_ht
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 48550
| -rw-r--r-- | package/kernel/mac80211/patches/317-mac80211-minstrel_ht-fix-out-of-bound-in-minstrel_ht.patch | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/317-mac80211-minstrel_ht-fix-out-of-bound-in-minstrel_ht.patch b/package/kernel/mac80211/patches/317-mac80211-minstrel_ht-fix-out-of-bound-in-minstrel_ht.patch new file mode 100644 index 0000000000..5bf53b918c --- /dev/null +++ b/package/kernel/mac80211/patches/317-mac80211-minstrel_ht-fix-out-of-bound-in-minstrel_ht.patch @@ -0,0 +1,45 @@ +From: Konstantin Khlebnikov <koct9i@gmail.com> +Date: Fri, 29 Jan 2016 11:35:12 +0300 +Subject: [PATCH] mac80211: minstrel_ht: fix out-of-bound in + minstrel_ht_set_best_prob_rate + +Patch fixes this splat + +BUG: KASAN: slab-out-of-bounds in minstrel_ht_update_stats.isra.7+0x6e1/0x9e0 +[mac80211] at addr ffff8800cee640f4 Read of size 4 by task swapper/3/0 + +Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com> +Link: http://lkml.kernel.org/r/CALYGNiNyJhSaVnE35qS6UCGaSb2Dx1_i5HcRavuOX14oTz2P+w@mail.gmail.com +--- + +--- a/net/mac80211/rc80211_minstrel_ht.c ++++ b/net/mac80211/rc80211_minstrel_ht.c +@@ -414,15 +414,16 @@ minstrel_ht_set_best_prob_rate(struct mi + (max_tp_group != MINSTREL_CCK_GROUP)) + return; + ++ max_gpr_group = mg->max_group_prob_rate / MCS_GROUP_RATES; ++ max_gpr_idx = mg->max_group_prob_rate % MCS_GROUP_RATES; ++ max_gpr_prob = mi->groups[max_gpr_group].rates[max_gpr_idx].prob_ewma; ++ + if (mrs->prob_ewma > MINSTREL_FRAC(75, 100)) { + cur_tp_avg = minstrel_ht_get_tp_avg(mi, cur_group, cur_idx, + mrs->prob_ewma); + if (cur_tp_avg > tmp_tp_avg) + mi->max_prob_rate = index; + +- max_gpr_group = mg->max_group_prob_rate / MCS_GROUP_RATES; +- max_gpr_idx = mg->max_group_prob_rate % MCS_GROUP_RATES; +- max_gpr_prob = mi->groups[max_gpr_group].rates[max_gpr_idx].prob_ewma; + max_gpr_tp_avg = minstrel_ht_get_tp_avg(mi, max_gpr_group, + max_gpr_idx, + max_gpr_prob); +@@ -431,7 +432,7 @@ minstrel_ht_set_best_prob_rate(struct mi + } else { + if (mrs->prob_ewma > tmp_prob) + mi->max_prob_rate = index; +- if (mrs->prob_ewma > mg->rates[mg->max_group_prob_rate].prob_ewma) ++ if (mrs->prob_ewma > max_gpr_prob) + mg->max_group_prob_rate = index; + } + } |