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efiemu/loadcore: Add grub_calloc() failure check

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Add a failure check after grub_calloc() call. If grub_calloc()
fails, e.g., due to memory allocation failure, it returns NULL.
Then using grub_efiemu_elfsyms, which will be NULL, later will
result in a NULL pointer dereference.

Signed-off-by: Avnish Chouhan <avnish@linux.ibm.com>
Reviewed-by: Sudhakar Kuppusamy <sudhakar@linux.ibm.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Avnish Chouhan 2025-11-27 14:32:12 +05:30 committed by Daniel Kiper
parent 641646376b
commit 09c512b8fa
1 changed files with 3 additions and 0 deletions
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grub-core/efiemu/loadcore.c
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@ -203,6 +203,9 @@ grub_efiemu_count_symbols (const Elf_Ehdr *e)
grub_efiemu_elfsyms = (struct grub_efiemu_elf_sym *) grub_efiemu_elfsyms = (struct grub_efiemu_elf_sym *)
grub_calloc (grub_efiemu_nelfsyms, sizeof (struct grub_efiemu_elf_sym)); grub_calloc (grub_efiemu_nelfsyms, sizeof (struct grub_efiemu_elf_sym));
if (grub_efiemu_elfsyms == NULL)
return grub_errno;
/* Relocators */ /* Relocators */
for (i = 0, s = (Elf_Shdr *) ((char *) e + e->e_shoff); for (i = 0, s = (Elf_Shdr *) ((char *) e + e->e_shoff);
i < e->e_shnum; i < e->e_shnum;