diff options
| -rw-r--r-- | sys/amd64/amd64/sys_machdep.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sys/amd64/amd64/sys_machdep.c b/sys/amd64/amd64/sys_machdep.c index 77abfe8..fb984f5 100644 --- a/sys/amd64/amd64/sys_machdep.c +++ b/sys/amd64/amd64/sys_machdep.c @@ -619,6 +619,8 @@ amd64_set_ldt(td, uap, descs) largest_ld = uap->start + uap->num; if (largest_ld > max_ldt_segment) largest_ld = max_ldt_segment; + if (largest_ld < uap->start) + return (EINVAL); i = largest_ld - uap->start; mtx_lock(&dt_lock); bzero(&((struct user_segment_descriptor *)(pldt->ldt_base)) @@ -631,7 +633,8 @@ amd64_set_ldt(td, uap, descs) /* verify range of descriptors to modify */ largest_ld = uap->start + uap->num; if (uap->start >= max_ldt_segment || - largest_ld > max_ldt_segment) + largest_ld > max_ldt_segment || + largest_ld < uap->start) return (EINVAL); } |
