linux-kernel - Re: [syzbot] Re: [syzbot] [v9fs?] WARNING in v9fs_begin

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Message-ID: <000000000000ef1381061fb00b6c@google.com>
Date: Wed, 14 Aug 2024 20:00:35 -0700
From: syzbot <syzbot+0b74d367d6e80661d6df@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org
Subject: Re: [syzbot] Re: [syzbot] [v9fs?] WARNING in v9fs_begin_writeback

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Subject: Re: [syzbot] [v9fs?] WARNING in v9fs_begin_writeback
Author: lizhi.xu@...driver.com

clean dirty for the release inode, stop to worker wb it again.

#syz test: upstream c0ecd6388360

diff --git a/fs/9p/vfs_dir.c b/fs/9p/vfs_dir.c
index e0d34e4e9076..85161f0bb749 100644
--- a/fs/9p/vfs_dir.c
+++ b/fs/9p/vfs_dir.c
@@ -218,7 +218,12 @@ int v9fs_dir_release(struct inode *inode, struct file *filp)
 		if ((S_ISREG(inode->i_mode)) && (filp->f_mode & FMODE_WRITE))
 			retval = filemap_fdatawrite(inode->i_mapping);
 
+		printk("fid: %p, fidnum: %d, ino: %lx, ino is freeing:%d, will free: %d, dirty: %d, %s\n", fid, fid->fid, inode->i_ino, 
+				inode->i_state & I_FREEING, 
+				inode->i_state & I_WILL_FREE,
+				inode->i_state & I_DIRTY, __func__);
 		spin_lock(&inode->i_lock);
+		inode->i_state |= I_FREEING;
 		hlist_del(&fid->ilist);
 		spin_unlock(&inode->i_lock);
 		put_err = p9_fid_put(fid);