This is a note to let you know that I've just added the patch titled
media: atomisp: gmin_platform: fix out_len in gmin_get_config_dsm_var()
to the 5.15-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:
media-atomisp-gmin_platform-fix-out_len-in-gmin_get_.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 59ecd8a7ed31e38464c20b55899d07ffa740f067
Author: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date: Fri May 26 12:53:23 2023 +0100
media: atomisp: gmin_platform: fix out_len in gmin_get_config_dsm_var()
[ Upstream commit 1657f2934daf89e8d9fa4b2697008909eb22c73e ]
Ideally, strlen(cur->string.pointer) and strlen(out) would be the same.
But this code is using strscpy() to avoid a potential buffer overflow.
So in the same way we should take the strlen() of the smaller string to
avoid a buffer overflow in the caller, gmin_get_var_int().
Link: https://lore.kernel.org/r/26124bcd-8132-4483-9d67-225c87d424e8@kili.mountain
Fixes: 387041cda44e ("media: atomisp: improve sensor detection code to use _DSM table")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
index cd0a771454da4..2a8ef766b25a4 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c
@@ -1198,7 +1198,7 @@ static int gmin_get_config_dsm_var(struct device *dev,
dev_info(dev, "found _DSM entry for '%s': %s\n", var,
cur->string.pointer);
strscpy(out, cur->string.pointer, *out_len);
- *out_len = strlen(cur->string.pointer);
+ *out_len = strlen(out);
ACPI_FREE(obj);
return 0;
