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| author |   Jens Axboe <axboe@kernel.dk> | 2020-11-13 16:47:52 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-11-13 16:47:52 -0700 |
| commit | 8d4c3e76e3be11a64df95ddee52e99092d42fc19 (patch) | |
| tree | 869d04ae6fffbe045a0f48ec5afc2775953e9222 /fs/proc | |
| parent | io_uring: round-up cq size before comparing with rounded sq size (diff) | |
| download | linux-dev-8d4c3e76e3be11a64df95ddee52e99092d42fc19.tar.xz linux-dev-8d4c3e76e3be11a64df95ddee52e99092d42fc19.zip | |
proc: don't allow async path resolution of /proc/self components
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>
Diffstat (limited to 'fs/proc')
| -rw-r--r-- | fs/proc/self.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/proc/self.c b/fs/proc/self.c index 72cd69bcaf4a..cc71ce3466dc 100644 --- a/fs/proc/self.c +++ b/fs/proc/self.c @@ -16,6 +16,13 @@ static const char *proc_self_get_link(struct dentry *dentry, pid_t tgid = task_tgid_nr_ns(current, ns); char *name; + /* + * Not currently supported. Once we can inherit all of struct pid, + * we can allow this. + */ + if (current->flags & PF_KTHREAD) + return ERR_PTR(-EOPNOTSUPP); + if (!tgid) return ERR_PTR(-ENOENT); /* max length of unsigned int in decimal + NULL term */ |