This is a note to let you know that I've just added the patch titled
firmware: arm_scpi: Fix string overflow in SCPI genpd driver
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
firmware-arm_scpi-fix-string-overflow-in-scpi-genpd-driver.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 865ed67ab955428b9aa771d8b4f1e4fb7fd08945 Mon Sep 17 00:00:00 2001
From: Sudeep Holla <sudeep.holla@xxxxxxx>
Date: Thu, 9 Dec 2021 12:04:56 +0000
Subject: firmware: arm_scpi: Fix string overflow in SCPI genpd driver
From: Sudeep Holla <sudeep.holla@xxxxxxx>
commit 865ed67ab955428b9aa771d8b4f1e4fb7fd08945 upstream.
Without the bound checks for scpi_pd->name, it could result in the buffer
overflow when copying the SCPI device name from the corresponding device
tree node as the name string is set at maximum size of 30.
Let us fix it by using devm_kasprintf so that the string buffer is
allocated dynamically.
Fixes: 8bec4337ad40 ("firmware: scpi: add device power domain support using genpd")
Reported-by: Pedro Batista <pedbap.g@xxxxxxxxx>
Signed-off-by: Sudeep Holla <sudeep.holla@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Cc: Cristian Marussi <cristian.marussi@xxxxxxx>
Link: https://lore.kernel.org/r/20211209120456.696879-1-sudeep.holla@xxxxxxx'
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/firmware/scpi_pm_domain.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
--- a/drivers/firmware/scpi_pm_domain.c
+++ b/drivers/firmware/scpi_pm_domain.c
@@ -27,7 +27,6 @@ struct scpi_pm_domain {
struct generic_pm_domain genpd;
struct scpi_ops *ops;
u32 domain;
- char name[30];
};
/*
@@ -121,8 +120,13 @@ static int scpi_pm_domain_probe(struct p
scpi_pd->domain = i;
scpi_pd->ops = scpi_ops;
- sprintf(scpi_pd->name, "%s.%d", np->name, i);
- scpi_pd->genpd.name = scpi_pd->name;
+ scpi_pd->genpd.name = devm_kasprintf(dev, GFP_KERNEL,
+ "%s.%d", np->name, i);
+ if (!scpi_pd->genpd.name) {
+ dev_err(dev, "Failed to allocate genpd name:%s.%d\n",
+ np->name, i);
+ continue;
+ }
scpi_pd->genpd.power_off = scpi_pd_power_off;
scpi_pd->genpd.power_on = scpi_pd_power_on;
Patches currently in stable-queue which might be from sudeep.holla@xxxxxxx are
queue-4.9/firmware-arm_scpi-fix-string-overflow-in-scpi-genpd-driver.patch
