Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Prevent crash when hprintf hypercall is used without a workdir #57

Open
wants to merge 1 commit into
base: qemu-nyx-4.2.0
Choose a base branch
from
Open

Prevent crash when hprintf hypercall is used without a workdir #57

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 4 additions & 0 deletions nyx/auxiliary_buffer.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -243,6 +243,10 @@ void set_hprintf_auxiliary_buffer(auxilary_buffer_t *auxilary_buffer,
char *msg,
uint32_t len)
{
if (!auxilary_buffer) {
nyx_warn("Ignored hprintf hypercall since no auxilary_buffer is set\n");
return;
}
uint32_t misc_data_size_value = misc_data_size();
VOLATILE_WRITE_16(auxilary_buffer->misc.len, MIN(len, misc_data_size_value));
volatile_memcpy((void *)&auxilary_buffer->misc.data, (void *)msg,
Expand Down