linux-kernel - Re: [syzbot] [iomap?] [erofs?] WARNING in iomap

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Message-ID: <tencent_5164697F63AFA45C5776B771A6C83368C305@qq.com>
Date: Sat, 14 Jun 2025 11:06:55 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+d8f000c609f05f52d9b5@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [iomap?] [erofs?] WARNING in iomap_iter (5)

#syz test

diff --git a/fs/iomap/iter.c b/fs/iomap/iter.c
index 6ffc6a7b9ba5..e53591538643 100644
--- a/fs/iomap/iter.c
+++ b/fs/iomap/iter.c
@@ -30,7 +30,8 @@ int iomap_iter_advance(struct iomap_iter *iter, u64 *count)
 
 static inline void iomap_iter_done(struct iomap_iter *iter)
 {
-	WARN_ON_ONCE(iter->iomap.offset > iter->pos);
+	WARN_ON_ONCE(iter->iomap.type != IOMAP_HOLE &&
+		     iter->iomap.offset > iter->pos);
 	WARN_ON_ONCE(iter->iomap.length == 0);
 	WARN_ON_ONCE(iter->iomap.offset + iter->iomap.length <= iter->pos);
 	WARN_ON_ONCE(iter->iomap.flags & IOMAP_F_STALE);