In the flush_tmregs_to_thread function in arch/powerpc/kernel/ptrace.c in the Linux kernel prior to 4.13.5, a guest kernel crash can be triggered from unprivileged userspace during a core dump on a POWER host due to a missing processor feature check and an erroneous use of transactional memory (TM) instructions in the core dump path, leading to a denial of service.
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linux linux kernel |
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