diff options
Diffstat (limited to 'sys/vm/vm_glue.c')
| -rw-r--r-- | sys/vm/vm_glue.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sys/vm/vm_glue.c b/sys/vm/vm_glue.c index 81451c1..92e1005 100644 --- a/sys/vm/vm_glue.c +++ b/sys/vm/vm_glue.c @@ -121,6 +121,12 @@ static void vm_proc_swapout(struct proc *p); /* * MPSAFE + * + * WARNING! This code calls vm_map_check_protection() which only checks + * the associated vm_map_entry range. It does not determine whether the + * contents of the memory is actually readable or writable. In most cases + * just checking the vm_map_entry is sufficient within the kernel's address + * space. */ int kernacc(addr, len, rw) @@ -142,6 +148,12 @@ kernacc(addr, len, rw) /* * MPSAFE + * + * WARNING! This code calls vm_map_check_protection() which only checks + * the associated vm_map_entry range. It does not determine whether the + * contents of the memory is actually readable or writable. vmapbuf(), + * vm_fault_quick(), or copyin()/copout()/su*()/fu*() functions should be + * used in conjuction with this call. */ int useracc(addr, len, rw) |
