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 stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 0c4a13ba88594fd4a27292853e736c6b4349823d # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2025121618-refuse-macaw-9005@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 0c4a13ba88594fd4a27292853e736c6b4349823d Mon Sep 17 00:00:00 2001 From: Junrui Luo moonafterrain@outlook.com Date: Thu, 6 Nov 2025 10:49:46 +0800 Subject: [PATCH] ALSA: wavefront: Fix integer overflow in sample size validation
The wavefront_send_sample() function has an integer overflow issue when validating sample size. The header->size field is u32 but gets cast to int for comparison with dev->freemem
Fix by using unsigned comparison to avoid integer overflow.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable@vger.kernel.org Signed-off-by: Junrui Luo moonafterrain@outlook.com Link: https://patch.msgid.link/SYBPR01MB7881B47789D1B060CE8BF4C3AFC2A@SYBPR01MB788... Signed-off-by: Takashi Iwai tiwai@suse.de
diff --git a/sound/isa/wavefront/wavefront_synth.c b/sound/isa/wavefront/wavefront_synth.c index cd5c177943aa..0d78533e1cfd 100644 --- a/sound/isa/wavefront/wavefront_synth.c +++ b/sound/isa/wavefront/wavefront_synth.c @@ -950,9 +950,9 @@ wavefront_send_sample (snd_wavefront_t *dev, if (header->size) { dev->freemem = wavefront_freemem (dev);
- if (dev->freemem < (int)header->size) { + if (dev->freemem < 0 || dev->freemem < header->size) { dev_err(dev->card->dev, - "insufficient memory to load %d byte sample.\n", + "insufficient memory to load %u byte sample.\n", header->size); return -ENOMEM; }