Hello, On Mon, 2023-02-20 at 14:35 +0100, Greg Kroah-Hartman wrote: > From: Kees Cook <keescook@xxxxxxxxxxxx> > > [ Upstream commit de5ca4c3852f896cacac2bf259597aab5e17d9e3 ] > > Nothing was explicitly bounds checking the priority index used to access > clpriop[]. WARN and bail out early if it's pathological. Seen with GCC 13: > > ../net/sched/sch_htb.c: In function 'htb_activate_prios': > ../net/sched/sch_htb.c:437:44: warning: array subscript [0, 31] is outside array bounds of 'struct htb_prio[8]' [-Warray-bounds=] > 437 | if (p->inner.clprio[prio].feed.rb_node) > | ~~~~~~~~~~~~~~~^~~~~~ > ../net/sched/sch_htb.c:131:41: note: while referencing 'clprio' > 131 | struct htb_prio clprio[TC_HTB_NUMPRIO]; > | ^~~~~~ > > Cc: Jamal Hadi Salim <jhs@xxxxxxxxxxxx> > Cc: Cong Wang <xiyou.wangcong@xxxxxxxxx> > Cc: Jiri Pirko <jiri@xxxxxxxxxxx> > Cc: "David S. Miller" <davem@xxxxxxxxxxxxx> > Cc: Eric Dumazet <edumazet@xxxxxxxxxx> > Cc: Jakub Kicinski <kuba@xxxxxxxxxx> > Cc: Paolo Abeni <pabeni@xxxxxxxxxx> > Cc: netdev@xxxxxxxxxxxxxxx > Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> > Reviewed-by: Simon Horman <simon.horman@xxxxxxxxxxxx> > Reviewed-by: Cong Wang <cong.wang@xxxxxxxxxxxxx> > Link: https://lore.kernel.org/r/20230127224036.never.561-kees@xxxxxxxxxx > Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx> > Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> This one has a follow-up which I don't see among the patches reaching the netdev ML: commit 9cec2aaffe969f2a3e18b5ec105fc20bb908e475 Author: Dan Carpenter <error27@xxxxxxxxx> Date: Mon Feb 6 16:18:32 2023 +0300 net: sched: sch: Fix off by one in htb_activate_prios() Cheers, Paolo
