git: 50ff71e956b6 - main - linux: Support PR_GET_CHILD_SUBREAPER prctl(2)

The branch main has been updated by pouria:

URL: https://cgit.FreeBSD.org/src/commit/?id=50ff71e956b631b56a878bd723a9b32dfbdac60f

commit 50ff71e956b631b56a878bd723a9b32dfbdac60f
Author:     Ricardo Branco <rbranco@suse.de>
AuthorDate: 2026-04-19 21:06:52 +0000
Commit:     Pouria Mousavizadeh Tehrani <pouria@FreeBSD.org>
CommitDate: 2026-04-22 09:26:55 +0000

    linux: Support PR_GET_CHILD_SUBREAPER prctl(2)
    
    PR: 294651
    Signed-off-by: Ricardo Branco <rbranco@suse.de>
    Reviewed by: kib, pouria
    Pull-Request: https://github.com/freebsd/freebsd-src/pull/2151
---
 sys/compat/linux/linux_misc.c | 12 ++++++++++++
 sys/compat/linux/linux_misc.h |  3 ++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/sys/compat/linux/linux_misc.c b/sys/compat/linux/linux_misc.c
index 937b010c8435..6080bbd058f0 100644
--- a/sys/compat/linux/linux_misc.c
+++ b/sys/compat/linux/linux_misc.c
@@ -1804,6 +1804,18 @@ linux_prctl(struct thread *td, struct linux_prctl_args *args)
 
 		return (kern_procctl(td, P_PID, 0, PROC_REAP_ACQUIRE,
 		    NULL));
+	case LINUX_PR_GET_CHILD_SUBREAPER: {
+		struct procctl_reaper_status rs;
+		l_int val;
+
+		error = kern_procctl(td, P_PID, 0, PROC_REAP_STATUS, &rs);
+		if (error != 0)
+			return (error);
+		val = rs.rs_reaper == p->p_pid ? 1 : 0;
+		error = copyout(&val, (void *)(register_t)args->arg2,
+		    sizeof(val));
+		break;
+	}
 	case LINUX_PR_SET_NO_NEW_PRIVS:
 		arg = args->arg2 == 1 ?
 		    PROC_NO_NEW_PRIVS_ENABLE : PROC_NO_NEW_PRIVS_DISABLE;
diff --git a/sys/compat/linux/linux_misc.h b/sys/compat/linux/linux_misc.h
index 63ed914afc63..4412ff5b0f92 100644
--- a/sys/compat/linux/linux_misc.h
+++ b/sys/compat/linux/linux_misc.h
@@ -57,7 +57,8 @@
 #define	LINUX_PR_GET_SECCOMP	21
 #define	LINUX_PR_SET_SECCOMP	22
 #define	LINUX_PR_CAPBSET_READ	23
-#define LINUX_PR_SET_CHILD_SUBREAPER 36
+#define	LINUX_PR_SET_CHILD_SUBREAPER	36 /* Get child subreaper status */
+#define	LINUX_PR_GET_CHILD_SUBREAPER	37 /* Set child subreaper status */
 #define	LINUX_PR_SET_NO_NEW_PRIVS	38
 #define	LINUX_PR_SET_PTRACER	1499557217