[hurd,commited] hurd: Fix mmap(!MAP_FIXED) on bogus address

[Samuel Thibault]

In the !MAP_FIXED case, when a bogus address is given mmap should pick up a
valide address rather than returning EINVAL: Posix only talks about
EINVAL for the MAP_FIXED case.

This fixes long-running ghc processes.
---
 sysdeps/mach/hurd/mmap.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/sysdeps/mach/hurd/mmap.c b/sysdeps/mach/hurd/mmap.c
index ed8faadee8..ea0e61d571 100644
--- a/sysdeps/mach/hurd/mmap.c
+++ b/sysdeps/mach/hurd/mmap.c
@@ -127,9 +127,9 @@ __mmap (void *addr, size_t len, int prot, int flags, int 
fd, off_t offset)
                  vmprot, VM_PROT_ALL,
                  (flags & MAP_SHARED) ? VM_INHERIT_SHARE : VM_INHERIT_COPY);
 
-  if (err == KERN_NO_SPACE)
+  if (flags & MAP_FIXED)
     {
-      if (flags & MAP_FIXED)
+      if (err == KERN_NO_SPACE)
        {
          /* XXX this is not atomic as it is in unix! */
          /* The region is already allocated; deallocate it first.  */
@@ -143,7 +143,10 @@ __mmap (void *addr, size_t len, int prot, int flags, int 
fd, off_t offset)
                            (flags & MAP_SHARED) ? VM_INHERIT_SHARE
                            : VM_INHERIT_COPY);
        }
-      else if (mapaddr != 0)
+    }
+  else
+    {
+      if (mapaddr != 0 && (err == KERN_NO_SPACE || err == 
KERN_INVALID_ADDRESS))
        err = __vm_map (__mach_task_self (),
                        &mapaddr, (vm_size_t) len, (vm_address_t) 0,
                        1, memobj, (vm_offset_t) offset,
-- 
2.29.2