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From: Edward Adam Davis <eadavis@qq.com>
To: syzbot+2d215d165f9354b9c4ea@syzkaller.appspotmail.com
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [fuse?] KASAN: slab-out-of-bounds Write in fuse_dev_do_write
Date: Sat, 23 Aug 2025 08:06:58 +0800	[thread overview]
Message-ID: <tencent_3F826C402D156CCC96B0EA0AEED6CC7C7B0A@qq.com> (raw)
In-Reply-To: <68a8f5db.a00a0220.33401d.02e1.GAE@google.com>

#syz test

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index e80cd8f2c049..5150aa25e64b 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -1893,7 +1893,7 @@ static int fuse_retrieve(struct fuse_mount *fm, struct inode *inode,
 
 	index = outarg->offset >> PAGE_SHIFT;
 
-	while (num) {
+	while (num && ap->num_folios < num_pages) {
 		struct folio *folio;
 		unsigned int folio_offset;
 		unsigned int nr_bytes;


  reply	other threads:[~2025-08-23  0:08 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-08-22 22:57 syzbot
2025-08-23  0:06 ` Edward Adam Davis [this message]
2025-08-23  0:29   ` syzbot
2025-08-23  0:53 ` Joanne Koong
2025-08-23  0:55   ` syzbot
2025-08-23  1:13     ` Joanne Koong
2025-08-23  1:15       ` syzbot
2025-08-23  1:17 ` [PATCH] fuse: Block access to folio overlimit Edward Adam Davis
2025-08-25 18:02   ` Joanne Koong
2025-08-27  1:45     ` [PATCH V2] " Edward Adam Davis
2025-08-27 12:27       ` Miklos Szeredi

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