mm: kmemleak: disable early logging in case of error
If an error occurs during kmemleak_init() (e.g. kmem cache cannot be created), kmemleak is disabled but kmemleak_early_log remains enabled. Subsequently, when the .init.text section is freed, the log_early() function no longer exists. To avoid a page fault in such scenario, ensure that kmemleak_disable() also disables early logging. Link: http://lkml.kernel.org/r/20190731152302.42073-1-catalin.marinas@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Reported-by: Qian Cai <cai@lca.pw> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -1966,6 +1966,7 @@ static void kmemleak_disable(void)
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/* stop any memory operation tracing */
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kmemleak_enabled = 0;
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kmemleak_early_log = 0;
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/* check whether it is too early for a kernel thread */
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if (kmemleak_initialized)
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@ -2009,7 +2010,6 @@ void __init kmemleak_init(void)
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#ifdef CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF
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if (!kmemleak_skip_disable) {
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kmemleak_early_log = 0;
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kmemleak_disable();
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return;
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}
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