From abcd4aa304268111b33daa61cb4dbe75da41b3aa Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Sun, 17 Jul 2011 00:24:37 -0300 Subject: [PATCH] si4713-i2c: avoid potential buffer overflow on si4713 MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit commit dc6b845044ccb7e9e6f3b7e71bd179b3cf0223b6 upstream. While compiling it with Fedora 15, I noticed this issue: inlined from ‘si4713_write_econtrol_string’ at drivers/media/radio/si4713-i2c.c:1065:24: arch/x86/include/asm/uaccess_32.h:211:26: error: call to ‘copy_from_user_overflow’ declared with attribute error: copy_from_user() buffer size is not provably correct Signed-off-by: Mauro Carvalho Chehab Acked-by: Sakari Ailus Acked-by: Eduardo Valentin Reviewed-by: Eugene Teo Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- drivers/media/radio/si4713-i2c.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/media/radio/si4713-i2c.c b/drivers/media/radio/si4713-i2c.c index 6a0028eb461f..93653c6e3040 100644 --- a/drivers/media/radio/si4713-i2c.c +++ b/drivers/media/radio/si4713-i2c.c @@ -1003,7 +1003,7 @@ static int si4713_write_econtrol_string(struct si4713_device *sdev, char ps_name[MAX_RDS_PS_NAME + 1]; len = control->size - 1; - if (len > MAX_RDS_PS_NAME) { + if (len < 0 || len > MAX_RDS_PS_NAME) { rval = -ERANGE; goto exit; } @@ -1025,7 +1025,7 @@ static int si4713_write_econtrol_string(struct si4713_device *sdev, char radio_text[MAX_RDS_RADIO_TEXT + 1]; len = control->size - 1; - if (len > MAX_RDS_RADIO_TEXT) { + if (len < 0 || len > MAX_RDS_RADIO_TEXT) { rval = -ERANGE; goto exit; } -- 2.39.5