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authorTakashi Iwai <tiwai@suse.de>2022-08-01 19:54:19 +0300
committerMark Brown <broonie@kernel.org>2022-08-05 14:57:23 +0300
commit1eb123ce985e6cf302ac6e3f19862d132d86fa8f (patch)
tree446ce426f6bc282c83dffe5f48e0b7593f86ad1b /sound
parentca3b7b9dc9bc1fa552f4697b7cccfa0258a44d00 (diff)
downloadlinux-1eb123ce985e6cf302ac6e3f19862d132d86fa8f.tar.xz
ASoC: SOF: debug: 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. Fixes: 5b10b6298921 ("ASoC: SOF: Add `memory_info` file to debugfs") Signed-off-by: Takashi Iwai <tiwai@suse.de> Link: https://lore.kernel.org/r/20220801165420.25978-3-tiwai@suse.de Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/sof/debug.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/sound/soc/sof/debug.c b/sound/soc/sof/debug.c
index c5d797e97c02..d9a3ce7b69e1 100644
--- a/sound/soc/sof/debug.c
+++ b/sound/soc/sof/debug.c
@@ -252,9 +252,9 @@ static int memory_info_update(struct snd_sof_dev *sdev, char *buf, size_t buff_s
}
for (i = 0, len = 0; i < reply->num_elems; i++) {
- ret = snprintf(buf + len, buff_size - len, "zone %d.%d used %#8x free %#8x\n",
- reply->elems[i].zone, reply->elems[i].id,
- reply->elems[i].used, reply->elems[i].free);
+ ret = scnprintf(buf + len, buff_size - len, "zone %d.%d used %#8x free %#8x\n",
+ reply->elems[i].zone, reply->elems[i].id,
+ reply->elems[i].used, reply->elems[i].free);
if (ret < 0)
goto error;
len += ret;