proc: don't allow async path resolution of /proc/self components
[ Upstream commit 8d4c3e76e3
]
If this is attempted by a kthread, then return -EOPNOTSUPP as we don't
currently support that. Once we can get task_pid_ptr() doing the right
thing, then this can go away again.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
parent
830f4aa73a
commit
01968f9af0
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@ -16,6 +16,13 @@ static const char *proc_self_get_link(struct dentry *dentry,
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pid_t tgid = task_tgid_nr_ns(current, ns);
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char *name;
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/*
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* Not currently supported. Once we can inherit all of struct pid,
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* we can allow this.
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*/
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if (current->flags & PF_KTHREAD)
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return ERR_PTR(-EOPNOTSUPP);
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if (!tgid)
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return ERR_PTR(-ENOENT);
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/* max length of unsigned int in decimal + NULL term */
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