diff options
| author | Dave Airlie <airlied@redhat.com> | 2021-06-23 10:07:48 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2021-06-23 10:07:48 +1000 |
| commit | f45fbbb6d5cff29ddfc708676ec1c2496eed3a07 (patch) | |
| tree | 5496fee9f6b10da368aa49b03612061156e42d2f /fs/proc/base.c | |
| parent | d472b36efbf8a27dc8a80519db8b5a8caffe42b6 (diff) | |
| parent | 13311e74253fe64329390df80bed3f07314ddd61 (diff) | |
Backmerge tag 'v5.13-rc7' into drm-next
Backmerge Linux 5.13-rc7 to make some pulls from later bases apply,
and to bake in the conflicts so far.
Diffstat (limited to 'fs/proc/base.c')
| -rw-r--r-- | fs/proc/base.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 3851bfcdba56..9cbd915025ad 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -2674,6 +2674,13 @@ out: } #ifdef CONFIG_SECURITY +static int proc_pid_attr_open(struct inode *inode, struct file *file) +{ + file->private_data = NULL; + __mem_open(inode, file, PTRACE_MODE_READ_FSCREDS); + return 0; +} + static ssize_t proc_pid_attr_read(struct file * file, char __user * buf, size_t count, loff_t *ppos) { @@ -2703,6 +2710,10 @@ static ssize_t proc_pid_attr_write(struct file * file, const char __user * buf, void *page; int rv; + /* A task may only write when it was the opener. */ + if (file->private_data != current->mm) + return -EPERM; + rcu_read_lock(); task = pid_task(proc_pid(inode), PIDTYPE_PID); if (!task) { @@ -2750,9 +2761,11 @@ out: } static const struct file_operations proc_pid_attr_operations = { + .open = proc_pid_attr_open, .read = proc_pid_attr_read, .write = proc_pid_attr_write, .llseek = generic_file_llseek, + .release = mem_release, }; #define LSM_DIR_OPS(LSM) \ |