From: Rosen Penev <rosenp@gmail.com>
Date: Tue, 19 May 2026 00:46:47 +0000 (-0700)
Subject: ALSA: oss: Use flexible allocation for PCM plugins
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2c515c221a7a2fd0dcb335b9866a98d0bedd9ca5;p=thirdparty%2Flinux.git

ALSA: oss: Use flexible allocation for PCM plugins

Allocate PCM plugin objects with kzalloc_flex() for the trailing
extra data area instead of open-coding the size calculation.

This keeps the allocation tied to the existing flexible array member
without changing the plugin lifetime.

Assisted-by: Codex:GPT-5.5
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20260519004647.627429-1-rosenp@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/sound/core/oss/pcm_plugin.c b/sound/core/oss/pcm_plugin.c
index 14b4a390a2192..5f4d6945a7df6 100644
--- a/sound/core/oss/pcm_plugin.c
+++ b/sound/core/oss/pcm_plugin.c
@@ -146,7 +146,7 @@ int snd_pcm_plugin_build(struct snd_pcm_substream *plug,
 		return -ENXIO;
 	if (snd_BUG_ON(!src_format || !dst_format))
 		return -ENXIO;
-	plugin = kzalloc(sizeof(*plugin) + extra, GFP_KERNEL);
+	plugin = kzalloc_flex(*plugin, extra_data, extra);
 	if (plugin == NULL)
 		return -ENOMEM;
 	plugin->name = name;