[FFmpeg-devel] [PATCH 1/9] lavd/jack: increase buffer size for snprintf()
Andreas Rheinhardt
andreas.rheinhardt at outlook.com
Fri Nov 26 17:37:30 EET 2021
Anton Khirnov:
> Maximum output size with a 32-bit int is 17 bytes, or 26 with a 64-bit
> int.
>
> Silences the following gcc 10 warning:
> src/libavdevice/jack.c: In function ‘audio_read_header’:
> src/libavdevice/jack.c:171:45: warning: ‘snprintf’ output may be truncated before the last format character [-Wformat-truncation=]
> 171 | snprintf(str, sizeof(str), "input_%d", i + 1);
> | ^
> src/libavdevice/jack.c:171:9: note: ‘snprintf’ output between 8 and 17 bytes into a destination of size 16
> 171 | snprintf(str, sizeof(str), "input_%d", i + 1);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ---
> libavdevice/jack.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/libavdevice/jack.c b/libavdevice/jack.c
> index 31534134f3..0d5465e407 100644
> --- a/libavdevice/jack.c
> +++ b/libavdevice/jack.c
> @@ -167,7 +167,7 @@ static int start_jack(AVFormatContext *context)
>
> /* Register JACK ports */
> for (i = 0; i < self->nports; i++) {
> - char str[16];
> + char str[32];
> snprintf(str, sizeof(str), "input_%d", i + 1);
> self->ports[i] = jack_port_register(self->client, str,
> JACK_DEFAULT_AUDIO_TYPE,
>
LGTM.
- Andreas
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