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linux(4): implement PR_SET_NO_NEW_PRIVS

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This makes prctl(2) support PR_SET_NO_NEW_PRIVS, by mapping it
to the native PROC_NO_NEW_PRIVS_CTL procctl(2).

Sponsored By:	EPSRC
Differential Revision:	https://reviews.freebsd.org/D30973
This commit is contained in:
Edward Tomasz Napierala 2021-07-03 08:41:59 +01:00
parent 45d99014ca
commit 2f514e6f13
1 changed files with 5 additions and 3 deletions
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8
sys/compat/linux/linux_misc.c
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@ -1982,7 +1982,7 @@ linux_capset(struct thread *td, struct linux_capset_args *uap)
int
linux_prctl(struct thread *td, struct linux_prctl_args *args)
{
int error = 0, max_size;
int error = 0, max_size, arg;
struct proc *p = td->td_proc;
char comm[LINUX_MAX_COMM_LEN];
int pdeath_signal, trace_state;
@ -2113,8 +2113,10 @@ linux_prctl(struct thread *td, struct linux_prctl_args *args)
error = EINVAL;
break;
case LINUX_PR_SET_NO_NEW_PRIVS:
linux_msg(td, "unsupported prctl PR_SET_NO_NEW_PRIVS");
error = EINVAL;
arg = args->arg2 == 1 ?
PROC_NO_NEW_PRIVS_ENABLE : PROC_NO_NEW_PRIVS_DISABLE;
error = kern_procctl(td, P_PID, p->p_pid,
PROC_NO_NEW_PRIVS_CTL, &arg);
break;
case LINUX_PR_SET_PTRACER:
linux_msg(td, "unsupported prctl PR_SET_PTRACER");