[PATCH v7 0/5] netem: bug fixes

[Stephen Hemminger <stephen@networkplumber.org>]

These bugs were found when doing AI assisted  review of sch_netem.c
during investigation of the packet duplication recursion problem
addressed in Jamal's series.

The fixes cover:

 - probability gaps in the 4-state Markov loss model
 - queue limit not accounting for reordered packets
 - PRNG reseeded on every tc change, breaking reproducibility
 - slot delay configuration not validated for inverted ranges
 - slot delay arithmetic overflow for ranges above ~2.1 seconds

v7 - queue limit check Fixes: goes back further to earlier change
   - use NL_SET_ERR_MSG_ATTR

Stephen Hemminger (5):
  net/sched: netem: fix probability gaps in 4-state loss model
  net/sched: netem: fix queue limit check to include reordered packets
  net/sched: netem: only reseed PRNG when seed is explicitly provided
  net/sched: netem: check for invalid slot range
  net/sched: netem: fix slot delay calculation overflow

 net/sched/sch_netem.c | 44 +++++++++++++++++++++++++++++++------------
 1 file changed, 32 insertions(+), 12 deletions(-)

-- 
2.53.0