From 2e7b21ebb8f845570641035f8a7832d33d8e5135 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 21 Aug 2024 07:38:10 +0200 Subject: Merging upstream version 6.10.6. Signed-off-by: Daniel Baumann --- kernel/sched/cputime.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'kernel/sched/cputime.c') diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c index aa48b2ec87..4feef0d4e4 100644 --- a/kernel/sched/cputime.c +++ b/kernel/sched/cputime.c @@ -582,6 +582,12 @@ void cputime_adjust(struct task_cputime *curr, struct prev_cputime *prev, } stime = mul_u64_u64_div_u64(stime, rtime, stime + utime); + /* + * Because mul_u64_u64_div_u64() can approximate on some + * achitectures; enforce the constraint that: a*b/(b+c) <= a. + */ + if (unlikely(stime > rtime)) + stime = rtime; update: /* -- cgit v1.2.3