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ARM64: check stack pointer in get_wchan
authorKonstantin Khlebnikov <k.khlebnikov@samsung.com>
Thu, 5 Dec 2013 13:30:10 +0000 (13:30 +0000)
committerCatalin Marinas <catalin.marinas@arm.com>
Thu, 19 Dec 2013 17:43:09 +0000 (17:43 +0000)
get_wchan() is lockless. Task may wakeup at any time and change its own stack,
thus each next stack frame may be overwritten and filled with random stuff.

Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@samsung.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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