Re: [syzbot] [nilfs?] possible deadlock in nilfs_dirty_inode (4)

[Ryusuke Konishi]

drop __GFP_FS for symlinks

#syz test

diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c
index c950139db6ef..bcd7d1288e2c 100644
--- a/fs/nilfs2/namei.c
+++ b/fs/nilfs2/namei.c
@@ -149,6 +149,9 @@ static int nilfs_symlink(struct mnt_idmap *idmap, struct inode *dir,
 	/* slow symlink */
 	inode->i_op = &nilfs_symlink_inode_operations;
 	inode_nohighmem(inode);
+	mapping_set_gfp_mask(inode->i_mapping,
+			     mapping_gfp_constraint(inode->i_mapping,
+						    ~__GFP_FS));
 	inode->i_mapping->a_ops = &nilfs_aops;
 	err = page_symlink(inode, symname, l);
 	if (err)