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bootboot: Fix potential buffer overflow in bruteforce_kernel() (see #124)

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mintsuki 2021-11-10 13:40:39 +01:00
parent 42cd7d95ac
commit 8b81412e14
1 changed files with 1 additions and 1 deletions
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2
stage23/protos/bootboot/initrd.c
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@ -7,7 +7,7 @@
#include <lib/blib.h>
struct initrd_file bruteforce_kernel(struct initrd_file file) {
for (size_t i = 0; i < file.size; i++) {
for (size_t i = 0; i < file.size - 19; i++) {
if (memcmp(file.data + i, "\177ELF", 4) == 0
&& file.data[i + 18] == 62 && file.data[i + 19] == 0 /* ehdr->e_machine == EM_X86_64 */) {
printv("bootboot: using bruteforced kernel at initrd offset %X\n", file.data + i);