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Diffstat (limited to 'kernel/pid.c')
-rw-r--r--kernel/pid.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/kernel/pid.c b/kernel/pid.c
index d3cd95b8b080..efe87db44683 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -559,6 +559,12 @@ int pidfd_create(struct pid *pid, unsigned int flags)
{
int fd;
+ if (!pid || !pid_has_task(pid, PIDTYPE_TGID))
+ return -EINVAL;
+
+ if (flags & ~(O_NONBLOCK | O_RDWR | O_CLOEXEC))
+ return -EINVAL;
+
fd = anon_inode_getfd("[pidfd]", &pidfd_fops, get_pid(pid),
flags | O_RDWR | O_CLOEXEC);
if (fd < 0)
@@ -598,10 +604,7 @@ SYSCALL_DEFINE2(pidfd_open, pid_t, pid, unsigned int, flags)
if (!p)
return -ESRCH;
- if (pid_has_task(p, PIDTYPE_TGID))
- fd = pidfd_create(p, flags);
- else
- fd = -EINVAL;
+ fd = pidfd_create(p, flags);
put_pid(p);
return fd;