linux-kernel - Re: [syzbot] [netfs?] kernel BUG in folio

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Message-ID: <20250221233542.2507-1-hdanton@sina.com>
Date: Sat, 22 Feb 2025 07:35:41 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+c0dc46208750f063d0e0@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [netfs?] kernel BUG in folio_unlock (3)

On Thu, 20 Feb 2025 08:00:24 -0800
> syzbot found the following issue on:
> 
> HEAD commit:    6537cfb395f3 Merge tag 'sound-6.14-rc4' of git://git.kerne..
> git tree:       upstream
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=141b4ba4580000

#syz test

--- x/fs/netfs/buffered_write.c
+++ y/fs/netfs/buffered_write.c
@@ -338,7 +338,7 @@ ssize_t netfs_perform_write(struct kiocb
 		folio_put(folio);
 		ret = filemap_write_and_wait_range(mapping, fpos, fpos + flen - 1);
 		if (ret < 0)
-			goto error_folio_unlock;
+			break;
 		continue;
 
 	copied:
--