After looking at the process_reloc_for_got function and where it is
called, I decided to use a branch statement to increase the robustness
of the pointer g.
If pointer g allocation fails, when 'chains [i]. next' is executed, it
can avoid crashes caused by wild pointers.
Signed-off-by: Li kunyu <[email protected]>
---
arch/alpha/kernel/module.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/arch/alpha/kernel/module.c b/arch/alpha/kernel/module.c
index cbefa5a77384..8c97f10347a7 100644
--- a/arch/alpha/kernel/module.c
+++ b/arch/alpha/kernel/module.c
@@ -47,11 +47,15 @@ process_reloc_for_got(Elf64_Rela *rela,
}
g = kmalloc (sizeof (*g), GFP_KERNEL);
- g->next = chains[r_sym].next;
- g->r_addend = r_addend;
- g->got_offset = *poffset;
- *poffset += 8;
- chains[r_sym].next = g;
+ if (g) {
+ g->next = chains[r_sym].next;
+ g->r_addend = r_addend;
+ g->got_offset = *poffset;
+ *poffset += 8;
+ chains[r_sym].next = g;
+ }
+ else
+ chains[r_sym].next = NULL;
found_entry:
/* Trick: most of the ELF64_R_TYPE field is unused. There are
--
2.18.2