From ed4060f50ea84c7e238110955253647fc091aee9 Mon Sep 17 00:00:00 2001 From: Samuel Thibault Date: Thu, 9 Jul 2015 13:56:30 +0200 Subject: hurd: permit to use mlock from non-root process * sysdeps/mach/hurd/mlock.c (mlock): When __get_privileged_ports returns an error, also try to use host port from __mach_host_self for the __vm_wire call. * sysdeps/mach/hurd/munlock.c (munlock): Likewise. --- ChangeLog | 7 +++++++ sysdeps/mach/hurd/mlock.c | 13 +++++++------ sysdeps/mach/hurd/munlock.c | 12 +++++++----- 3 files changed, 21 insertions(+), 11 deletions(-) diff --git a/ChangeLog b/ChangeLog index 95f3ddf..ed509cf 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,10 @@ +2015-07-09 Samuel Thibault + + * sysdeps/mach/hurd/mlock.c (mlock): When __get_privileged_ports + returns an error, also try to use host port from __mach_host_self for + the __vm_wire call. + * sysdeps/mach/hurd/munlock.c (munlock): Likewise. + 2015-07-09 Szabolcs Nagy [BZ #18400] diff --git a/sysdeps/mach/hurd/mlock.c b/sysdeps/mach/hurd/mlock.c index 10078e7..8ef568e 100644 --- a/sysdeps/mach/hurd/mlock.c +++ b/sysdeps/mach/hurd/mlock.c @@ -28,19 +28,20 @@ int mlock (const void *addr, size_t len) { - mach_port_t hostpriv; + mach_port_t host; vm_address_t page; error_t err; - err = __get_privileged_ports (&hostpriv, NULL); + err = __get_privileged_ports (&host, NULL); if (err) - return __hurd_fail (EPERM); + host = __mach_host_self(); page = trunc_page ((vm_address_t) addr); len = round_page ((vm_address_t) addr + len) - page; - err = __vm_wire (hostpriv, __mach_task_self (), page, len, - VM_PROT_READ); - __mach_port_deallocate (__mach_task_self (), hostpriv); + + err = __vm_wire (host, __mach_task_self (), page, len, VM_PROT_READ); + if (host != __mach_host_self()) + __mach_port_deallocate (__mach_task_self (), host); return err ? __hurd_fail (err) : 0; } diff --git a/sysdeps/mach/hurd/munlock.c b/sysdeps/mach/hurd/munlock.c index 411115d..d063afc 100644 --- a/sysdeps/mach/hurd/munlock.c +++ b/sysdeps/mach/hurd/munlock.c @@ -27,18 +27,20 @@ int munlock (const void *addr, size_t len) { - mach_port_t hostpriv; + mach_port_t host; vm_address_t page; error_t err; - err = __get_privileged_ports (&hostpriv, NULL); + err = __get_privileged_ports (&host, NULL); if (err) - return __hurd_fail (EPERM); + host = __mach_host_self(); page = trunc_page ((vm_address_t) addr); len = round_page ((vm_address_t) addr + len) - page; - err = __vm_wire (hostpriv, __mach_task_self (), page, len, VM_PROT_NONE); - __mach_port_deallocate (__mach_task_self (), hostpriv); + + err = __vm_wire (host, __mach_task_self (), page, len, VM_PROT_NONE); + if (host != __mach_host_self()) + __mach_port_deallocate (__mach_task_self (), host); return err ? __hurd_fail (err) : 0; } -- cgit v1.1