From: Simon McVittie <smcv@collabora.com>
Date: Wed, 25 May 2022 11:33:42 +0000 (+0100)
Subject: conf: Use ino64_t to save and compare inode numbers
X-Git-Tag: v1.2.7.1~5
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=87ff5318e327eb2343f10bd73dce5a32f12db622;p=alsa-lib.git

conf: Use ino64_t to save and compare inode numbers

On 32-bit platforms when not using the large-file-support ABI,
struct stat64 contains ino64_t which is 64-bit, while ino_t is only
32-bit.

snd_config_update_r() checks whether a file has been replaced by saving
the ino member of a struct stat64 and comparing it with a previously-saved
inode number. On 32-bit platforms, assigning the 64-bit member of struct
stat64 to a 32-bit member of struct finfo will truncate it modulo 1<<32,
which could conceivably result in libasound not reloading configuration
when it should (although the inode number space is large enough to make
this failure mode highly unlikely).

Fixes: https://github.com/alsa-project/alsa-lib/pull/231
Signed-off-by: Simon McVittie <smcv@collabora.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---

diff --git a/include/local.h b/include/local.h
index 51fa4063..268a9ff1 100644
--- a/include/local.h
+++ b/include/local.h
@@ -84,6 +84,7 @@
 #define scandir64 scandir
 #define versionsort64 versionsort
 #define alphasort64 alphasort
+#define ino64_t ino_t
 #endif
 
 #define _snd_config_iterator list_head
diff --git a/src/conf.c b/src/conf.c
index 3d2b4a5b..a996e5f9 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -3921,7 +3921,7 @@ snd_config_t *snd_config = NULL;
 struct finfo {
 	char *name;
 	dev_t dev;
-	ino_t ino;
+	ino64_t ino;
 	time_t mtime;
 };