linux-kernel - [GIT PULL] memblock: fix crash when reserved memory is not added to memory

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Date: Sun, 28 Jan 2024 08:42:16 +0200
From: Mike Rapoport <rppt@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Mike Rapopoprt <rppt@...nel.org>, Yajun Deng <yajun.deng@...ux.dev>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [GIT PULL] memblock: fix crash when reserved memory is not added to
 memory

Hi Linus,

The following changes since commit 0dd3ee31125508cd67f7e7172247f05b7fd1753a:

  Linux 6.7 (2024-01-07 12:18:38 -0800)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock tags/fixes-2024-01-28

for you to fetch changes up to 6a9531c3a88096a26cf3ac582f7ec44f94a7dcb2:

  memblock: fix crash when reserved memory is not added to memory (2024-01-19 10:53:59 +0200)

----------------------------------------------------------------
memblock: fix crash when reserved memory is not added to memory

When CONFIG_DEFERRED_STRUCT_PAGE_INIT is enabled, the initialization of
reserved pages may cause access of NODE_DATA() with invalid nid and crash.

Add a fall back to early_pfn_to_nid() in memmap_init_reserved_pages() to
ensure a valid node id is always passed to init_reserved_page().

----------------------------------------------------------------
Yajun Deng (1):
      memblock: fix crash when reserved memory is not added to memory

 mm/memblock.c | 3 +++
 1 file changed, 3 insertions(+)