[PATCH v2 0/2] net: sched: act_ife: initialize struct tc_ife to fix KMSAN kernel-infoleak

[Ranganath V N]

Fix a KMSAN kernel-infoleak detected  by the syzbot .

[net?] KMSAN: kernel-infoleak in __skb_datagram_iter

In tcf_ife_dump(), the variable 'opt' was partially initialized using a
designatied initializer. While the padding bytes are reamined
uninitialized. nla_put() copies the entire structure into a
netlink message, these uninitialized bytes leaked to userspace.

Initialize the structure with memset before assigning its fields
to ensure all members and padding are cleared prior to beign copied.

Signed-off-by: Ranganath V N <vnranganath.20@xxxxxxxxx>
---
Changes in v2:
- removed memset(&t, 0, sizeof(t)) from previous patch.
- added the new patch series to address the issue.
- Link to v1: https://lore.kernel.org/r/20251031-infoleak-v1-1-9f7250ee33aa@xxxxxxxxx

---
Ranganath V N (2):
      net: sched: act_ife: initialize struct tc_ife to fix KMSAN kernel-infoleak
      net: sched: act_connmark: zero initialize the struct to avoid KMSAN

 net/sched/act_connmark.c | 12 +++++++-----
 net/sched/act_ife.c      | 12 +++++++-----
 2 files changed, 14 insertions(+), 10 deletions(-)
---
base-commit: d127176862a93c4b3216bda533d2bee170af5e71
change-id: 20251031-infoleak-8a7de6afc987

Best regards,
-- 
Ranganath V N <vnranganath.20@xxxxxxxxx>