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linux: Add support for PR_SET_VMA to prctl(2)

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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.
This commit is contained in:
Pawel Biernacki
2026-05-30 12:15:21 +00:00
parent eda74fe479
commit a64148e21b
2 changed files with 9 additions and 0 deletions
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sys/compat/linux/linux_misc.c
+7
View File
@@ -1835,6 +1835,13 @@ 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;
sys/compat/linux/linux_misc.h
+2
View File
@@ -62,6 +62,8 @@
#define LINUX_PR_SET_NO_NEW_PRIVS 38 /* Set no_new_privs attribute */
#define LINUX_PR_GET_NO_NEW_PRIVS 39 /* Get no_new_privs attribute */
#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. */