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From: Ranganath V N <vnranganath.20@gmail.com>
To: davem@davemloft.net, edumazet@google.com, horms@kernel.org,
	jhs@mojatatu.com, jiri@resnulli.us, kuba@kernel.org,
	pabeni@redhat.com, xiyou.wangcong@gmail.com
Cc: vnranganath.20@gmail.com, david.hunter.linux@gmail.com,
	khalid@kernel.org, linux-kernel@vger.kernel.org,
	netdev@vger.kernel.org, skhan@linuxfoundation.org,
	syzbot+0c85cae3350b7d486aee@syzkaller.appspotmail.com
Subject: [PATCH v3 0/2] net: sched: initialize struct tc_ife to fix kernel-infoleak
Date: Fri,  7 Nov 2025 01:26:32 +0530	[thread overview]
Message-ID: <20251106195635.2438-1-vnranganath.20@gmail.com> (raw)


This series addresses the uninitialization of the struct which has 
2 btes of padding. And copying this uninitialized data to userspace
can leak info from kernel memory.

This sereies ensure all members and padding are cleared prior to 
begin copied.

This change silences the KMSAN report and prevents potential information
leaks from the kernel memory.

Signed-off-by: Ranganath V N <vnranganath.20@gmail.com>
---
Changes in v3:
- updated the commit messages and subject.
- corrected the code misisng ";" in v2
- Link to v2: https://lore.kernel.org/r/20251101-infoleak-v2-0-01a501d41c09@gmail.com 

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@gmail.com

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

 net/sched/act_connmark.c | 12 +++++++-----
 net/sched/act_ife.c      | 12 +++++++-----
 2 files changed, 14 insertions(+), 10 deletions(-)

-- 
2.43.0


             reply	other threads:[~2025-11-06 19:56 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-11-06 19:56 Ranganath V N [this message]
2025-11-06 19:56 ` [PATCH v3 1/2] net: sched: act_connmark: initialize struct tc_ife to fix kernel leak Ranganath V N
2025-11-07 10:38   ` Simon Horman
2025-11-08  1:26   ` kernel test robot
2025-11-06 19:56 ` [PATCH v3 2/2] net: sched: act_ife: initialize struct tc_ife to fix KMSAN kernel-infoleak Ranganath V N
2025-11-08  1:15   ` kernel test robot
2025-11-08  1:26   ` kernel test robot
  -- strict thread matches above, loose matches on Subject: below --
2025-11-06 19:28 [PATCH v3 0/2] net: sched: initialize struct tc_ife to fix kernel-infoleak Ranganath V N

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