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| author |   Corey Minyard <cminyard@mvista.com> | 2020-03-06 11:23:14 -0600 |
|---|---|---|
| committer |   Christian Brauner <christian.brauner@ubuntu.com> | 2020-03-08 14:22:58 +0100 |
| commit | b26ebfe12f34f372cf041c6f801fa49c3fb382c5 (patch) | |
| tree | 9a5d22df7e6984674e9c6ae186536dd80022ba15 /kernel | |
| parent | Linux 5.6-rc4 (diff) | |
| download | linux-dev-b26ebfe12f34f372cf041c6f801fa49c3fb382c5.tar.xz linux-dev-b26ebfe12f34f372cf041c6f801fa49c3fb382c5.zip | |
pid: Fix error return value in some cases
Recent changes to alloc_pid() allow the pid number to be specified on
the command line. If set_tid_size is set, then the code scanning the
levels will hard-set retval to -EPERM, overriding it's previous -ENOMEM
value.
After the code scanning the levels, there are error returns that do not
set retval, assuming it is still set to -ENOMEM.
So set retval back to -ENOMEM after scanning the levels.
Fixes: 49cb2fc42ce4 ("fork: extend clone3() to support setting a PID")
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Andrei Vagin <avagin@gmail.com>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Adrian Reber <areber@redhat.com>
Cc: <stable@vger.kernel.org> # 5.5
Link: https://lore.kernel.org/r/20200306172314.12232-1-minyard@acm.org
[christian.brauner@ubuntu.com: fixup commit message]
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/pid.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/pid.c b/kernel/pid.c index 0f4ecb57214c..19645b25b77c 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -247,6 +247,8 @@ struct pid *alloc_pid(struct pid_namespace *ns, pid_t *set_tid, tmp = tmp->parent; } + retval = -ENOMEM; + if (unlikely(is_child_reaper(pid))) { if (pid_ns_prepare_proc(ns)) goto out_free; |