[PATCH 3/7] contrib/elf2dmp: Ensure segment fits in file

[Akihiko Odaki]

This makes elf2dmp more robust against corrupted inputs.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
 contrib/elf2dmp/addrspace.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/contrib/elf2dmp/addrspace.c b/contrib/elf2dmp/addrspace.c
index 980a7aa5f8fb..d546a400dfda 100644
--- a/contrib/elf2dmp/addrspace.c
+++ b/contrib/elf2dmp/addrspace.c
@@ -88,11 +88,12 @@ int pa_space_create(struct pa_space *ps, QEMU_Elf *qemu_elf)
     ps->block = g_new(struct pa_block, ps->block_nr);
 
     for (i = 0; i < phdr_nr; i++) {
-        if (phdr[i].p_type == PT_LOAD) {
+        if (phdr[i].p_type == PT_LOAD && phdr[i].p_offset < qemu_elf->size) {
             ps->block[block_i] = (struct pa_block) {
                 .addr = (uint8_t *)qemu_elf->map + phdr[i].p_offset,
                 .paddr = phdr[i].p_paddr,
-                .size = phdr[i].p_filesz,
+                .size = MIN(phdr[i].p_filesz,
+                            qemu_elf->size - phdr[i].p_offset),
             };
             pa_block_align(&ps->block[block_i]);
             block_i = ps->block[block_i].size ? (block_i + 1) : block_i;

-- 
2.44.0