[PATCH net 0/5] net: fix misc signed overflows caused by bad sysctl values

[Jiayuan Chen <jiayuan.chen@linux.dev>]

Recently I have reviewed quite a few fixes for variable overflows caused
by config values, i.e. a value set from sysctl, module params or netlink
that is accepted as valid but later overflows when it is used in a
calculation. I believe there are more of these still out there, so I
used an LLM to dig through the code and it found the issues fixed in
this series.

All of them have been reproduced and verified in QEMU.

Jiayuan Chen (5):
  ipv6: restrict gc_elasticity to 31
  ipv4: fix shift-out-of-bounds in ip_rt_send_redirect()
  ipv6: restrict mld_qrv to 255
  ipv4: restrict igmp_qrv to 255
  net: restrict message_cost and message_burst to non-negative values

 net/core/sysctl_net_core.c | 21 +++++++++++++++++++--
 net/ipv4/route.c           |  7 ++++---
 net/ipv4/sysctl_net_ipv4.c |  4 +++-
 net/ipv6/route.c           |  6 +++++-
 net/ipv6/sysctl_net_ipv6.c |  4 +++-
 5 files changed, 34 insertions(+), 8 deletions(-)

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2.43.0