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Catalin Marinas authored
The MTE coredump code in arch/arm64/kernel/elfcore.c iterates over the vma list without the mmap_lock held. This can race with another process or userfaultfd concurrently modifying the vma list. Change the for_each_mte_vma macro and its callers to instead use the vma snapshot taken by dump_vma_snapshot() and stored in the cprm object. Fixes: 6dd8b1a0 ("arm64: mte: Dump the MTE tags in the core file") Cc: <stable@vger.kernel.org> # 5.18.x Signed-off-by:
Catalin Marinas <catalin.marinas@arm.com> Reported-by:
Seth Jenkins <sethjenkins@google.com> Suggested-by:
Seth Jenkins <sethjenkins@google.com> Cc: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20221222181251.1345752-4-catalin.marinas@arm.comSigned-off-by:
Will Deacon <will@kernel.org>
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