On Fri, Dec 18, 2020 at 7:06 PM Stephen Brennan <stephen.s.brennan@xxxxxxxxxx> wrote: > > Smack needs its security_task_to_inode() hook to be called when a task > execs a new executable. Store the self_exec_id of the task and call the > hook via pid_update_inode() whenever the exec_id changes. > > Signed-off-by: Stephen Brennan <stephen.s.brennan@xxxxxxxxxx> Sorry to be late in responding, but the proc inode security structure needs to be updated not only upon a context-changing exec but also upon a setcon(3) aka write to /proc/self/attr/current just like the uid/gid needs to be updated not only upon a setuid exec but also upon a setuid(2). I'm also unclear as to why you can't call security_task_to_inode during RCU lookup; it doesn't block/sleep AFAICT. All it does is take a spinlock and update a few fields.
