fs: Fix error checking for d_hash_and_lookup()
[ Upstream commit0d5a4f8f77
] The d_hash_and_lookup() function returns error pointers or NULL. Most incorrect error checks were fixed, but the one in int path_pts() was forgotten. Fixes:eedf265aa0
("devpts: Make each mount of devpts an independent filesystem.") Signed-off-by: Wang Ming <machel@vivo.com> Message-Id: <20230713120555.7025-1-machel@vivo.com> Signed-off-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -2890,7 +2890,7 @@ int path_pts(struct path *path)
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dput(path->dentry);
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path->dentry = parent;
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child = d_hash_and_lookup(parent, &this);
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if (!child)
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if (IS_ERR_OR_NULL(child))
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return -ENOENT;
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path->dentry = child;
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