linux-kernel - [PATCH] exfat: check for utf8 option change in exfat

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Message-ID: <20250925155306.394763-1-pedrodemargomes@gmail.com>
Date: Thu, 25 Sep 2025 12:53:06 -0300
From: Pedro Demarchi Gomes <pedrodemargomes@...il.com>
To: linkinjeon@...nel.org,
	sj1557.seo@...sung.com,
	yuezhang.mo@...y.com
Cc: linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Pedro Demarchi Gomes <pedrodemargomes@...il.com>,
	syzbot+3e9cb93e3c5f90d28e19@...kaller.appspotmail.com
Subject: [PATCH] exfat: check for utf8 option change in exfat_reconfigure

Check for utf8 option change since it depends on iocharset

Reported-by: syzbot+3e9cb93e3c5f90d28e19@...kaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=3e9cb93e3c5f90d28e19
Signed-off-by: Pedro Demarchi Gomes <pedrodemargomes@...il.com>
---
 fs/exfat/super.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/exfat/super.c b/fs/exfat/super.c
index e1cffa46eb73..500eb9c20657 100644
--- a/fs/exfat/super.c
+++ b/fs/exfat/super.c
@@ -762,6 +762,7 @@ static int exfat_reconfigure(struct fs_context *fc)
 	 * inodes or dentries, they cannot be modified dynamically.
 	 */
 	if (strcmp(new_opts->iocharset, cur_opts->iocharset) ||
+	    new_opts->utf8 != cur_opts->utf8 ||
 	    new_opts->keep_last_dots != cur_opts->keep_last_dots ||
 	    new_opts->sys_tz != cur_opts->sys_tz ||
 	    new_opts->time_offset != cur_opts->time_offset ||
-- 
2.43.0