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ANDROID: MEMORY: mm/page_alloc.c the pointer is not initialized

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the pointer is not initialized in __alloc_pages_noprof.
And it will lead to panic when CONFIG_INIT_STACK_ALL_ZERO=n.
Because in the function flow, the pointer of the page is not
initialized, it becomes non-null, and the vendorhook may not
be executed. This leads to the non-null check being passed,
causing the out process to be skipped and the program continuing
with the subsequent steps.

Bug: 420376550
Change-Id: Ibd2eb2bd8a24e431ce90781bed3b72694c06bb42
Signed-off-by: Dezhen Wang <dezhen.wang@amlogic.com>
This commit is contained in:
Dezhen Wang
2025-05-26 09:06:44 +00:00
committed by Treehugger Robot
parent 650df1f653
commit 0034411d55
1 changed files with 1 additions and 1 deletions
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mm/page_alloc.c
+1 -1
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@@ -5115,7 +5115,7 @@ EXPORT_SYMBOL_GPL(alloc_pages_bulk_noprof);
struct page *__alloc_pages_noprof(gfp_t gfp, unsigned int order, struct page *__alloc_pages_noprof(gfp_t gfp, unsigned int order,
int preferred_nid, nodemask_t *nodemask) int preferred_nid, nodemask_t *nodemask)
{ {
struct page *page; struct page *page = NULL;
unsigned int alloc_flags = ALLOC_WMARK_LOW; unsigned int alloc_flags = ALLOC_WMARK_LOW;
gfp_t alloc_gfp; /* The gfp_t that was actually used for allocation */ gfp_t alloc_gfp; /* The gfp_t that was actually used for allocation */
struct alloc_context ac = { }; struct alloc_context ac = { };