git: 18ea9571f7a4 - stable/15 - getpgrp(2), getsid(2): allow to call on zombies

The branch stable/15 has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=18ea9571f7a423059b7f34903ebb0201afed660a

commit 18ea9571f7a423059b7f34903ebb0201afed660a
Author:     Konstantin Belousov <[email protected]>
AuthorDate: 2026-07-22 09:36:17 +0000
Commit:     Konstantin Belousov <[email protected]>
CommitDate: 2026-07-27 00:28:43 +0000

    getpgrp(2), getsid(2): allow to call on zombies
    
    (cherry picked from commit 8f320c2bc473a775ea9a55d17fa61f729e593867)
---
 sys/kern/kern_prot.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/sys/kern/kern_prot.c b/sys/kern/kern_prot.c
index a223a7720844..5aa7fcf7c653 100644
--- a/sys/kern/kern_prot.c
+++ b/sys/kern/kern_prot.c
@@ -196,7 +196,7 @@ sys_getpgid(struct thread *td, struct getpgid_args *uap)
 		p = td->td_proc;
 		PROC_LOCK(p);
 	} else {
-		p = pfind(uap->pid);
+		p = pfind_any(uap->pid);
 		if (p == NULL)
 			return (ESRCH);
 		error = p_cansee(td, p);
@@ -231,11 +231,12 @@ kern_getsid(struct thread *td, pid_t pid)
 	struct proc *p;
 	int error;
 
+	error = 0;
 	if (pid == 0) {
 		p = td->td_proc;
 		PROC_LOCK(p);
 	} else {
-		p = pfind(pid);
+		p = pfind_any(pid);
 		if (p == NULL)
 			return (ESRCH);
 		error = p_cansee(td, p);
@@ -244,9 +245,12 @@ kern_getsid(struct thread *td, pid_t pid)
 			return (error);
 		}
 	}
-	td->td_retval[0] = p->p_session->s_sid;
+	if (p->p_session != NULL)
+		td->td_retval[0] = p->p_session->s_sid;
+	else
+		error = EINVAL;
 	PROC_UNLOCK(p);
-	return (0);
+	return (error);
 }
 
 #ifndef _SYS_SYSPROTO_H_