diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/loongarch/kernel/machine_kexec.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/loongarch/kernel/machine_kexec.c b/arch/loongarch/kernel/machine_kexec.c index d7fafda1d541..1883cae93bc3 100644 --- a/arch/loongarch/kernel/machine_kexec.c +++ b/arch/loongarch/kernel/machine_kexec.c @@ -42,6 +42,7 @@ static unsigned long first_ind_entry; int machine_kexec_prepare(struct kimage *kimage) { int i; + char head[8]; char *bootloader = "kexec"; void *cmdline_ptr = (void *)KEXEC_CMDLINE_ADDR; @@ -59,7 +60,9 @@ int machine_kexec_prepare(struct kimage *kimage) } else { /* Find the command line */ for (i = 0; i < kimage->nr_segments; i++) { - if (!strncmp(bootloader, (char __user *)kimage->segment[i].buf, strlen(bootloader))) { + if (copy_from_user(head, kimage->segment[i].buf, strlen(bootloader))) + continue; + if (!strncmp(bootloader, head, strlen(bootloader))) { if (!copy_from_user(cmdline_ptr, kimage->segment[i].buf, COMMAND_LINE_SIZE)) kimage->arch.cmdline_ptr = (unsigned long)cmdline_ptr; break; |