git: e8b9b6b9f31c - main - pdkill(2), pdgetpid(2): return EBADF if the file type is not procdesc

The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=e8b9b6b9f31c463137b4104550bfb3286a43703a

commit e8b9b6b9f31c463137b4104550bfb3286a43703a
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2026-08-05 08:04:49 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2026-08-05 18:15:54 +0000

    pdkill(2), pdgetpid(2): return EBADF if the file type is not procdesc
    
    For pdwait(2) and pddupfd(2), the returned error is kept EINVAL.
    
    PR:     297293
    Reviewed by:    lwhsu, markj
    Sponsored by:   The FreeBSD Foundation
    MFC after:      1 week
    Differential revision:  https://reviews.freebsd.org/D58666
---
 sys/kern/kern_exit.c    |  3 ++-
 sys/kern/kern_sig.c     |  3 ++-
 sys/kern/sys_procdesc.c | 10 ++++++----
 sys/sys/procdesc.h      |  4 ++--
 4 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/sys/kern/kern_exit.c b/sys/kern/kern_exit.c
index efdd51e2ec97..fa1721fbaede 100644
--- a/sys/kern/kern_exit.c
+++ b/sys/kern/kern_exit.c
@@ -1563,7 +1563,8 @@ kern_pdwait(struct thread *td, int fd, int *status,
 	if (error != 0)
 		return (error);
 
-	error = fget_procdesc(td, fd, &cap_pdwait_rights, &fp, &pd, NULL);
+	error = fget_procdesc(td, fd, &cap_pdwait_rights, EINVAL, &fp,
+	    &pd, NULL);
 	if (error != 0)
 		goto exit_unlocked;
 
diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c
index 27ab109d2ac5..629ce1c3c40a 100644
--- a/sys/kern/kern_sig.c
+++ b/sys/kern/kern_sig.c
@@ -1965,7 +1965,8 @@ sys_pdkill(struct thread *td, struct pdkill_args *uap)
 		return (EINVAL);
 
 	sx_slock(&proctree_lock);
-	error = fget_procdesc(td, uap->fd, &cap_pdkill_rights, &fp, NULL, &p);
+	error = fget_procdesc(td, uap->fd, &cap_pdkill_rights, EBADF, &fp,
+	    NULL, &p);
 	sx_sunlock(&proctree_lock);
 	if (error != 0)
 		goto out;
diff --git a/sys/kern/sys_procdesc.c b/sys/kern/sys_procdesc.c
index 289b9f100897..0d0ca7b6871c 100644
--- a/sys/kern/sys_procdesc.c
+++ b/sys/kern/sys_procdesc.c
@@ -142,7 +142,7 @@ kern_pdgetpid(struct thread *td, int fd, const cap_rights_t *rightsp,
 	struct file *fp;
 	int error;
 
-	error = fget_procdesc(td, fd, rightsp, &fp, NULL, NULL);
+	error = fget_procdesc(td, fd, rightsp, EBADF, &fp, NULL, NULL);
 	if (error == 0)
 		*pidp = procdesc_pid(fp);
 	if (fp != NULL)
@@ -753,7 +753,8 @@ sys_pdopenpid(struct thread *td, struct pdopenpid_args *args)
  */
 int
 fget_procdesc(struct thread *td, int pdfd, const cap_rights_t *cap_rights,
-    struct file **pfp, struct procdesc **pdp, struct proc **pp)
+    int wrong_type_error, struct file **pfp, struct procdesc **pdp,
+    struct proc **pp)
 {
 	struct file *fp;
 	struct procdesc *pd;
@@ -769,7 +770,7 @@ fget_procdesc(struct thread *td, int pdfd, const cap_rights_t *cap_rights,
 		return (error);
 	*pfp = fp;
 	if (fp->f_type != DTYPE_PROCDESC)
-		return (EINVAL);
+		return (wrong_type_error);
 	pd = fp->f_data;
 	if (pp != NULL) {
 		p = pd->pd_proc;
@@ -795,7 +796,8 @@ kern_pddupfd(struct thread *td, int pdfd, int fd, int flags)
 	int error, fdr;
 
 	sx_slock(&proctree_lock);
-	error = fget_procdesc(td, pdfd, &cap_pddupfd_rights, &pfp, NULL, &p);
+	error = fget_procdesc(td, pdfd, &cap_pddupfd_rights, EINVAL, &pfp,
+	    NULL, &p);
 	if (error == 0) {
 		if ((p->p_flag & P_WEXIT) != 0) {
 			error = ESRCH;
diff --git a/sys/sys/procdesc.h b/sys/sys/procdesc.h
index 0c923509f6eb..6cb837af2d3b 100644
--- a/sys/sys/procdesc.h
+++ b/sys/sys/procdesc.h
@@ -122,8 +122,8 @@ void	 procdesc_fill_winfo(struct procdesc *pd, bool proc_locked);
 int	 procdesc_falloc(struct thread *, struct file **, int *, int,
 	    struct filecaps *);
 int	 fget_procdesc(struct thread *td, int pfd,
-	    const cap_rights_t *cap_rights, struct file **pfp,
-	    struct procdesc **pdp, struct proc **pp);
+	    const cap_rights_t *cap_rights, int wrong_type_error,
+	    struct file **pfp, struct procdesc **pdp, struct proc **pp);
 #else /* !_KERNEL */
 
 #include <sys/cdefs.h>