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| author | Takashi Iwai <tiwai@suse.de> | 2022-08-01 18:54:19 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-08-05 12:57:23 +0100 |
| commit | 1eb123ce985e6cf302ac6e3f19862d132d86fa8f (patch) | |
| tree | 446ce426f6bc282c83dffe5f48e0b7593f86ad1b /sound | |
| parent | ca3b7b9dc9bc1fa552f4697b7cccfa0258a44d00 (diff) | |
| download | linux-stable-1eb123ce985e6cf302ac6e3f19862d132d86fa8f.tar.gz linux-stable-1eb123ce985e6cf302ac6e3f19862d132d86fa8f.tar.bz2 linux-stable-1eb123ce985e6cf302ac6e3f19862d132d86fa8f.zip | |
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.c | 6 |
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; |