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| author | Jakub Kicinski <kuba@kernel.org> | 2021-05-27 09:22:11 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-05-27 09:55:10 -0700 |
| commit | 5ada57a9a6b0be0e6dfcbd4afa519b0347fd5649 (patch) | |
| tree | f82f466df9272bb0c385320b25adc51c45309f84 /fs/proc | |
| parent | 59c56342459a483d5e563ed8b5fdb77ab7622a73 (diff) | |
| parent | d7c5303fbc8ac874ae3e597a5a0d3707dc0230b4 (diff) | |
| download | lwn-5ada57a9a6b0be0e6dfcbd4afa519b0347fd5649.tar.gz lwn-5ada57a9a6b0be0e6dfcbd4afa519b0347fd5649.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
cdc-wdm: s/kill_urbs/poison_urbs/ to fix build
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'fs/proc')
| -rw-r--r-- | fs/proc/base.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 3851bfcdba56..58bbf334265b 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -2703,6 +2703,10 @@ 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->f_cred != current_real_cred()) + return -EPERM; + rcu_read_lock(); task = pid_task(proc_pid(inode), PIDTYPE_PID); if (!task) { |