linux-kernel - [PATCH 0/2] OPP: fix buffer overflow in indexed freq and bandwidth reads

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20241128-topic-opp-fix-assert-index-check-v1-0-cb8bd4c0370e@linaro.org>
Date: Thu, 28 Nov 2024 11:07:53 +0100
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>, 
 Stephen Boyd <sboyd@...nel.org>, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc: Viresh Kumar <viresh.kumar@...aro.org>, linux-pm@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH 0/2] OPP: fix buffer overflow in indexed freq and bandwidth
 reads

While fixing a crash when calling dev_pm_opp_find_bw_ceil()
because the bandwdith table wasn't initialized, it happens
the index is not checked aswell for indexed freq finds.

In order to properly fix that, pass the index to the assert
function and add a specialized assert function for freq
and bandwidth.

Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
---
Neil Armstrong (2):
      OPP: add index check to assert to avoid buffer overflow in _read_freq()
      OPP: fix dev_pm_opp_find_bw_*() when bandwidth table not initialized

 drivers/opp/core.c | 52 ++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 36 insertions(+), 16 deletions(-)
---
base-commit: 6f3d2b5299b0a8bcb8a9405a8d3fceb24f79c4f0
change-id: 20241128-topic-opp-fix-assert-index-check-f46fe5c3c7ba

Best regards,
-- 
Neil Armstrong <neil.armstrong@...aro.org>