diff options
author | Randy Dunlap <rdunlap@infradead.org> | 2020-12-24 22:23:44 -0800 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-01-12 19:49:02 +0100 |
commit | 586692be691c9955b277219b8a8f8559594b391a (patch) | |
tree | 4ad0254e58cc564ed01b47a2938e43f2ea8f2a82 | |
parent | f1f4a514bbc6810574321cc1bc2b640ef8f347fb (diff) |
net: sched: prevent invalid Scell_log shift count
[ Upstream commit bd1248f1ddbc48b0c30565fce897a3b6423313b8 ]
Check Scell_log shift size in red_check_params() and modify all callers
of red_check_params() to pass Scell_log.
This prevents a shift out-of-bounds as detected by UBSAN:
UBSAN: shift-out-of-bounds in ./include/net/red.h:252:22
shift exponent 72 is too large for 32-bit type 'int'
Fixes: 8afa10cbe281 ("net_sched: red: Avoid illegal values")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: syzbot+97c5bd9cc81eca63d36e@syzkaller.appspotmail.com
Cc: Nogah Frankel <nogahf@mellanox.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: netdev@vger.kernel.org
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | include/net/red.h | 4 | ||||
-rw-r--r-- | net/sched/sch_choke.c | 2 | ||||
-rw-r--r-- | net/sched/sch_gred.c | 2 | ||||
-rw-r--r-- | net/sched/sch_red.c | 2 | ||||
-rw-r--r-- | net/sched/sch_sfq.c | 2 |
5 files changed, 7 insertions, 5 deletions
diff --git a/include/net/red.h b/include/net/red.h index 3618cdfec884..17821f66de11 100644 --- a/include/net/red.h +++ b/include/net/red.h @@ -167,12 +167,14 @@ static inline void red_set_vars(struct red_vars *v) v->qcount = -1; } -static inline bool red_check_params(u32 qth_min, u32 qth_max, u8 Wlog) +static inline bool red_check_params(u32 qth_min, u32 qth_max, u8 Wlog, u8 Scell_log) { if (fls(qth_min) + Wlog > 32) return false; if (fls(qth_max) + Wlog > 32) return false; + if (Scell_log >= 32) + return false; if (qth_max < qth_min) return false; return true; diff --git a/net/sched/sch_choke.c b/net/sched/sch_choke.c index d13e1de0b3a2..2fb79c245f3f 100644 --- a/net/sched/sch_choke.c +++ b/net/sched/sch_choke.c @@ -425,7 +425,7 @@ static int choke_change(struct Qdisc *sch, struct nlattr *opt) ctl = nla_data(tb[TCA_CHOKE_PARMS]); - if (!red_check_params(ctl->qth_min, ctl->qth_max, ctl->Wlog)) + if (!red_check_params(ctl->qth_min, ctl->qth_max, ctl->Wlog, ctl->Scell_log)) return -EINVAL; if (ctl->limit > CHOKE_MAX_QUEUE) diff --git a/net/sched/sch_gred.c b/net/sched/sch_gred.c index 729c0e4eca21..d86a96313981 100644 --- a/net/sched/sch_gred.c +++ b/net/sched/sch_gred.c @@ -356,7 +356,7 @@ static inline int gred_change_vq(struct Qdisc *sch, int dp, struct gred_sched *table = qdisc_priv(sch); struct gred_sched_data *q = table->tab[dp]; - if (!red_check_params(ctl->qth_min, ctl->qth_max, ctl->Wlog)) + if (!red_check_params(ctl->qth_min, ctl->qth_max, ctl->Wlog, ctl->Scell_log)) return -EINVAL; if (!q) { diff --git a/net/sched/sch_red.c b/net/sched/sch_red.c index 4610d44f58d3..797895bddcfd 100644 --- a/net/sched/sch_red.c +++ b/net/sched/sch_red.c @@ -184,7 +184,7 @@ static int red_change(struct Qdisc *sch, struct nlattr *opt) max_P = tb[TCA_RED_MAX_P] ? nla_get_u32(tb[TCA_RED_MAX_P]) : 0; ctl = nla_data(tb[TCA_RED_PARMS]); - if (!red_check_params(ctl->qth_min, ctl->qth_max, ctl->Wlog)) + if (!red_check_params(ctl->qth_min, ctl->qth_max, ctl->Wlog, ctl->Scell_log)) return -EINVAL; if (ctl->limit > 0) { diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c index 633e237a406c..69a5fffed86c 100644 --- a/net/sched/sch_sfq.c +++ b/net/sched/sch_sfq.c @@ -645,7 +645,7 @@ static int sfq_change(struct Qdisc *sch, struct nlattr *opt) } if (ctl_v1 && !red_check_params(ctl_v1->qth_min, ctl_v1->qth_max, - ctl_v1->Wlog)) + ctl_v1->Wlog, ctl_v1->Scell_log)) return -EINVAL; if (ctl_v1 && ctl_v1->qth_min) { p = kmalloc(sizeof(*p), GFP_KERNEL); |