diff options
| -rw-r--r-- | sys/kern/imgact_elf.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/sys/kern/imgact_elf.c b/sys/kern/imgact_elf.c index 6ae6d67..f7bbdcf 100644 --- a/sys/kern/imgact_elf.c +++ b/sys/kern/imgact_elf.c @@ -596,7 +596,7 @@ __elfN(load_section)(struct image_params *imgp, vm_ooffset_t offset, /* This had damn well better be true! */ if (map_len != 0) { rv = __elfN(map_insert)(imgp, map, NULL, 0, map_addr, - map_addr + map_len, VM_PROT_ALL, 0); + map_addr + map_len, prot, 0); if (rv != KERN_SUCCESS) return (EINVAL); } @@ -617,10 +617,12 @@ __elfN(load_section)(struct image_params *imgp, vm_ooffset_t offset, } /* - * set it to the specified protection. + * Remove write access to the page if it was only granted by map_insert + * to allow copyout. */ - vm_map_protect(map, trunc_page(map_addr), round_page(map_addr + - map_len), prot, FALSE); + if ((prot & VM_PROT_WRITE) == 0) + vm_map_protect(map, trunc_page(map_addr), round_page(map_addr + + map_len), prot, FALSE); return (0); } |
