linux-kernel - [PATCH] fs: assert on I_FREEING not being set in iput() and iput_not

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Message-ID: <20251201132037.22835-1-mjguzik@gmail.com>
Date: Mon,  1 Dec 2025 14:20:37 +0100
From: Mateusz Guzik <mjguzik@...il.com>
To: brauner@...nel.org
Cc: viro@...iv.linux.org.uk,
	jack@...e.cz,
	linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	Mateusz Guzik <mjguzik@...il.com>
Subject: [PATCH] fs: assert on I_FREEING not being set in iput() and iput_not_last()

Signed-off-by: Mateusz Guzik <mjguzik@...il.com>
---
 fs/inode.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/inode.c b/fs/inode.c
index cc8265cfe80e..521383223d8a 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1968,7 +1968,7 @@ void iput(struct inode *inode)
 
 retry:
 	lockdep_assert_not_held(&inode->i_lock);
-	VFS_BUG_ON_INODE(inode_state_read_once(inode) & I_CLEAR, inode);
+	VFS_BUG_ON_INODE(inode_state_read_once(inode) & (I_FREEING | I_CLEAR), inode);
 	/*
 	 * Note this assert is technically racy as if the count is bogusly
 	 * equal to one, then two CPUs racing to further drop it can both
@@ -2010,6 +2010,7 @@ EXPORT_SYMBOL(iput);
  */
 void iput_not_last(struct inode *inode)
 {
+	VFS_BUG_ON_INODE(inode_state_read_once(inode) & (I_FREEING | I_CLEAR), inode);
 	VFS_BUG_ON_INODE(atomic_read(&inode->i_count) < 2, inode);
 
 	WARN_ON(atomic_sub_return(1, &inode->i_count) == 0);
-- 
2.48.1