FAILED: patch "[PATCH] ASoC: SOF: Intel: hda: Fix potential buffer overflow by" failed to apply to 5.15-stable tree

The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 94c1ceb043c1a002de9649bb630c8e8347645982 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <[email protected]>
Date: Mon, 1 Aug 2022 18:54:20 +0200
Subject: [PATCH] ASoC: SOF: Intel: hda: Fix potential buffer overflow by
snprintf()

snprintf() returns the would-be-filled size when the string overflows the given buffer size, hence using this value may result in the buffer overflow (although it's unrealistic).

This patch replaces with a safer version, scnprintf() for papering over such a potential issue.

index 8639ea63a10d..6d4ecbe14adf 100644
@@ -574,7 +574,7 @@ static void hda_dsp_dump_ext_rom_status(struct snd_sof_dev *sdev, const char *le
 	chip = get_chip_info(sdev->pdata);
 	for (i = 0; i < HDA_EXT_ROM_STATUS_SIZE; i++) {
 		value = snd_sof_dsp_read(sdev, HDA_DSP_BAR, chip->rom_status_reg + i * 0x4);
-		len += snprintf(msg + len, sizeof(msg) - len, " 0x%x", value);
+		len += scnprintf(msg + len, sizeof(msg) - len, " 0x%x", value);
 	}
 
 	dev_printk(level, sdev->dev, "extended rom status: %s", msg);