ARM: 6654/1: perf/oprofile: fix off-by-one in stack check

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Since tail is the previous fp - 1, we need to compare the new fp with tail + 1
to ensure that we don't end up passing in the same tail again, in order to
avoid a potential infinite loop in the perf interrupt handler (which has been
observed to occur).  A similar fix seems to be needed in the OProfile code.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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Rabin Vincent 2011-02-09 11:35:12 +01:00 • committed by Russell King

parent 4a9cb36019

commit cb06199b1d

2 changed files with 2 additions and 2 deletions

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arch/arm/kernel/perf_event.c

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2

arch/arm/oprofile/common.c

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