bugGNU GRUB - Bugs: bug #62925, Out of memory error initializing...

 
 

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bug #62925: Out of memory error initializing graphics on some Apple M1 systems

Submitter:  Hector Martin <marcan>
Submitted:  Sat 20 Aug 2022 11:32:41 AM UTC
   
 
Category:  Booting Severity:  Major
Priority:  5 - Normal Item Group:  None
Status:  None Privacy:  Public
Assigned to:  None Originator Name: 
Open/Closed:  Open Release:  Git master
Release:  Reproducibility:  Every Time
Planned Release:  None

Sat 20 Aug 2022 11:32:41 AM UTC, original submission:  

As of grub-2:2.06.r297.g0c6c1aff2-1-aarch64 as packaged by Arch Linux ARM (which is vanilla grub as of that git revision, other than grub.d patches and trivial packaging-related changes), initializing graphics fails on Apple M1 Pro MacBook 14" systems, and probably others, with an out of memory error. This leads to a degraded text console with broken menu graphic characters. This didn't happen with the previous package (grub-2.06.r261.g2f4430cc0-1).

The open source boot stack on these systems uses U-Boot as an EFI services provider. It seems GRUB is simply running out of heap as of recent changes. This trivial patch fixes it:


diff -urN grub-core/kern/efi/mm.c grub-core/kern/efi/mm.c
--- grub-core/kern/efi/mm.c     2022-08-20 20:17:23.975902981 +0900
+++ grub-core/kern/efi/mm.c     2022-08-20 20:17:16.268139945 +0900
@@ -39,7 +39,7 @@
 #define MEMORY_MAP_SIZE        0x3000

 /* The default heap size for GRUB itself in bytes.  */
-#define DEFAULT_HEAP_SIZE      0x100000
+#define DEFAULT_HEAP_SIZE      0x200000

 static void *finish_mmap_buf = 0;
 static grub_efi_uintn_t finish_mmap_size = 0;


Hector Martin <marcan>

 

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Depends on the following items: None found

Items that depend on this one: None found

 

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