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The following commit(s) were added to refs/heads/master by this push:
new 118bddf0ce avcodec/dfpwmdec: Check nb_samples
118bddf0ce is described below
commit 118bddf0ce42cc0b6b70ca35860b02dc9b891e70
Author: Michael Niedermayer <[email protected]>
AuthorDate: Fri May 1 21:33:25 2026 +0200
Commit: Michael Niedermayer <[email protected]>
CommitDate: Sun May 3 16:56:43 2026 +0200
avcodec/dfpwmdec: Check nb_samples
Fixes: integer overflow
Found-by: Dhiraj Mishra <[email protected]>
Signed-off-by: Michael Niedermayer <[email protected]>
---
libavcodec/dfpwmdec.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/libavcodec/dfpwmdec.c b/libavcodec/dfpwmdec.c
index 4ddb806561..6a7a23e39d 100644
--- a/libavcodec/dfpwmdec.c
+++ b/libavcodec/dfpwmdec.c
@@ -101,15 +101,16 @@ static int dfpwm_dec_frame(struct AVCodecContext *ctx,
AVFrame *frame,
{
DFPWMState *state = ctx->priv_data;
int ret;
+ uint64_t nb_samples = packet->size * 8LL / ctx->ch_layout.nb_channels;
if (packet->size * 8LL % ctx->ch_layout.nb_channels)
return AVERROR_PATCHWELCOME;
- frame->nb_samples = packet->size * 8LL / ctx->ch_layout.nb_channels;
- if (frame->nb_samples <= 0) {
+ if (nb_samples > INT_MAX || !nb_samples) {
av_log(ctx, AV_LOG_ERROR, "invalid number of samples in packet\n");
return AVERROR_INVALIDDATA;
}
+ frame->nb_samples = nb_samples;
if ((ret = ff_get_buffer(ctx, frame, 0)) < 0)
return ret;
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