This is a note to let you know that I've just added the patch titled iio: adis_buffer: Fix out-of-bounds memory access to the 4.4-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: iio-adis_buffer-fix-out-of-bounds-memory-access.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From d590faf9e8f8509a0a0aa79c38e87fcc6b913248 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen <lars@xxxxxxxxxx> Date: Fri, 27 Nov 2015 14:55:56 +0100 Subject: iio: adis_buffer: Fix out-of-bounds memory access From: Lars-Peter Clausen <lars@xxxxxxxxxx> commit d590faf9e8f8509a0a0aa79c38e87fcc6b913248 upstream. The SPI tx and rx buffers are both supposed to be scan_bytes amount of bytes large and a common allocation is used to allocate both buffers. This puts the beginning of the tx buffer scan_bytes bytes after the rx buffer. The initialization of the tx buffer pointer is done adding scan_bytes to the beginning of the rx buffer, but since the rx buffer is of type __be16 this will actually add two times as much and the tx buffer ends up pointing after the allocated buffer. Fix this by using scan_count, which is scan_bytes / 2, instead of scan_bytes when initializing the tx buffer pointer. Fixes: aacff892cbd5 ("staging:iio:adis: Preallocate transfer message") Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx> Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/iio/imu/adis_buffer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/iio/imu/adis_buffer.c +++ b/drivers/iio/imu/adis_buffer.c @@ -43,7 +43,7 @@ int adis_update_scan_mode(struct iio_dev return -ENOMEM; rx = adis->buffer; - tx = rx + indio_dev->scan_bytes; + tx = rx + scan_count; spi_message_init(&adis->msg); Patches currently in stable-queue which might be from lars@xxxxxxxxxx are queue-4.4/iio-adis_buffer-fix-out-of-bounds-memory-access.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html