s390/numa: always use logical cpu and core ids

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The toptree algorithm uses the physical core ids to create a mapping
between cores and nodes (to_node_id array within emu_cores structure).
The core ids are used as an index into an array which size depends on
CONFIG_NR_CPUS. If the physical core ids are larger, this will result
in out-of-bounds write accesses.

Generate logical core ids instead to avoid this.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Heiko Carstens 2016-12-02 13:16:02 +01:00 • committed by Martin Schwidefsky

parent 11a247e376

commit 307b3114ef

2 changed files with 7 additions and 1 deletions

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6

arch/s390/include/asm/smp.h

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2

arch/s390/numa/mode_emu.c

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