Forwarded: Re: [syzbot] [nilfs?] INFO: task hung in find_inode (2)

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Subject: Re: [syzbot] [nilfs?] INFO: task hung in find_inode (2)
Author: konishi.ryusuke@xxxxxxxxx


#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git c21bb4193868

Fix deadlock between find_inode() and nilfs_evict_inode()

diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index 9332f5ac6083..6b2b7060f004 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -830,8 +830,11 @@ static void nilfs_iput_work_func(struct work_struct *work)
 	struct nilfs_sc_info *sci = container_of(work, struct nilfs_sc_info,
 						 sc_iput_work);
 	struct the_nilfs *nilfs = sci->sc_super->s_fs_info;
+	struct nilfs_transaction_info ti;
 
+	nilfs_transaction_begin(sci->sc_super, &ti, 0);
 	nilfs_dispose_list(nilfs, &sci->sc_iput_queue, 0);
+	nilfs_transaction_commit(sci->sc_super);
 }
 
 static int nilfs_test_metadata_dirty(struct the_nilfs *nilfs,
-- 
2.43.0