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arm64: hibernate: check pgd table allocation
authorPavel Tatashin <pasha.tatashin@soleen.com>
Mon, 14 Oct 2019 14:48:24 +0000 (10:48 -0400)
committerWill Deacon <will@kernel.org>
Tue, 15 Oct 2019 00:57:29 +0000 (17:57 -0700)
commit8c551f919a73c1dfa690a70a691be1da394145e8
tree89201c9a4463d62132f376e49f423ff48e06e704tree | snapshot
parentec52c7134b1fcef0edfc56d55072fd4f261ef198commit | diff
arm64: hibernate: check pgd table allocation

There is a bug in create_safe_exec_page(), when page table is allocated
it is not checked that table is allocated successfully:

But it is dereferenced in: pgd_none(READ_ONCE(*pgdp)).  Check that
allocation was successful.

Fixes: 82869ac57b5d ("arm64: kernel: Add support for hibernate/suspend-to-disk")
Reviewed-by: James Morse <james.morse@arm.com>
Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Will Deacon <will@kernel.org>
arch/arm64/kernel/hibernate.c diff | blob | history
ep93xx device tree rework repo: git://git.maquefel.me/linux.git