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loader/i386/xnu: Fix uninitialized scalar variable

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In the function grub_xnu_boot_resume(), struct grub_relocator32_state state is
called but isn't being initialized. This results in the members grub_uint32_t
ebx, grub_uint32_t ecx, grub_uint32_t edx, grub_uint32_t esi, and grub_uint32_t
edi being filled with junk data from the stack since none of them are being set
to any values. We can prevent this by setting state to {0}.

Fixes: CID 375031

Signed-off-by: Alec Brown <alec.r.brown@oracle.com>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Alec Brown authored and Daniel Kiper committed 2022-04-04 20:28:55 +02:00
1 parent 261e4511ce
commit 4fa5dd08f5
1 file changed
+1 -1
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grub-core/loader/i386/xnu.c
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@@ -805,7 +805,7 @@ grub_cpu_xnu_fill_devicetree (grub_uint64_t *fsbfreq_out)
grub_err_t
grub_xnu_boot_resume (void)
{
struct grub_relocator32_state state;
struct grub_relocator32_state state = {0};
state.esp = grub_xnu_stack;
state.ebp = grub_xnu_stack;