git: 687f618e8ca3 - stable/15 - linux: Add support for PR_SET_VMA to prctl(2)

The branch stable/15 has been updated by chuck:

URL: https://cgit.FreeBSD.org/src/commit/?id=687f618e8ca329b98b33e8a40e81a0869436e7ed

commit 687f618e8ca329b98b33e8a40e81a0869436e7ed
Author:     Pawel Biernacki <kaktus@FreeBSD.org>
AuthorDate: 2026-05-30 12:15:21 +0000
Commit:     Chuck Tuffli <chuck@FreeBSD.org>
CommitDate: 2026-07-08 21:27:06 +0000

    linux: Add support for PR_SET_VMA to prctl(2)
    
    Implement dummy support for PR_SET_VMA with PR_SET_VMA_ANON_NAME in
    prctl(2).  This prevents applications from receiving EINVAL when
    attempting to name anonymous memory regions.
    
    (cherry picked from commit a64148e21bb4ac976345cbedbd32942f97f07cc1)
---
 sys/compat/linux/linux_misc.c | 7 +++++++
 sys/compat/linux/linux_misc.h | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/sys/compat/linux/linux_misc.c b/sys/compat/linux/linux_misc.c
index 1a4eba5f9d39..de40449e6f15 100644
--- a/sys/compat/linux/linux_misc.c
+++ b/sys/compat/linux/linux_misc.c
@@ -1814,6 +1814,13 @@ linux_prctl(struct thread *td, struct linux_prctl_args *args)
 		linux_msg(td, "unsupported prctl PR_SET_PTRACER");
 		error = EINVAL;
 		break;
+	case LINUX_PR_SET_VMA:
+		if (args->arg2 != LINUX_PR_SET_VMA_ANON_NAME) {
+			linux_msg(td, "unsupported prctl PR_SET_VMA attr %ju",
+			    (uintmax_t)args->arg2);
+			error = EINVAL;
+		}
+		break;
 	default:
 		linux_msg(td, "unsupported prctl option %d", args->option);
 		error = EINVAL;
diff --git a/sys/compat/linux/linux_misc.h b/sys/compat/linux/linux_misc.h
index 63ed914afc63..1beab540a0bc 100644
--- a/sys/compat/linux/linux_misc.h
+++ b/sys/compat/linux/linux_misc.h
@@ -60,6 +60,8 @@
 #define LINUX_PR_SET_CHILD_SUBREAPER 36
 #define	LINUX_PR_SET_NO_NEW_PRIVS	38
 #define	LINUX_PR_SET_PTRACER	1499557217
+#define	LINUX_PR_SET_VMA	1398164801
+#define	LINUX_PR_SET_VMA_ANON_NAME	0
 
 #define	LINUX_MAX_COMM_LEN	16	/* Maximum length of the process name. */