From: Alexander Potapenko <gli...@google.com> Dmitry Vyukov has reported unexpected KASAN stackdepot growth:
https://github.com/google/kasan/issues/36 ... which is caused by the APIC handlers not being present in .irqentry.text: When building with CONFIG_FUNCTION_GRAPH_TRACER=y or CONFIG_KASAN=y, put the APIC interrupt handlers into the .irqentry.text section. This is needed because both KASAN and function graph tracer use __irqentry_text_start and __irqentry_text_end to determine whether a function is an IRQ entry point. Reported-by: Dmitry Vyukov <dvyu...@google.com> Signed-off-by: Alexander Potapenko <gli...@google.com> Cc: Andy Lutomirski <l...@kernel.org> Cc: Borislav Petkov <b...@alien8.de> Cc: Brian Gerst <brge...@gmail.com> Cc: Denys Vlasenko <dvlas...@redhat.com> Cc: H. Peter Anvin <h...@zytor.com> Cc: Josh Poimboeuf <jpoim...@redhat.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Cc: aryabi...@virtuozzo.com Cc: kasan-...@googlegroups.com Cc: k...@google.com Cc: rost...@goodmis.org Link: http://lkml.kernel.org/r/1468575763-144889-1-git-send-email-gli...@google.com [ Minor edits. ] Signed-off-by: Ingo Molnar <mi...@kernel.org> https://jira.sw.ru/browse/PSBM-69081 (cherry picked from commit 469f00231278da68062a809306df0bac95a27507) Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com> --- arch/x86/kernel/entry_64.S | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index d9f78516a26c..dd755f8037ca 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -960,9 +960,20 @@ apicinterrupt3 \num trace(\sym) smp_trace(\sym) .endm #endif +/* Make sure APIC interrupt handlers end up in the irqentry section: */ +#if defined(CONFIG_FUNCTION_GRAPH_TRACER) || defined(CONFIG_KASAN) +# define PUSH_SECTION_IRQENTRY .pushsection .irqentry.text, "ax" +# define POP_SECTION_IRQENTRY .popsection +#else +# define PUSH_SECTION_IRQENTRY +# define POP_SECTION_IRQENTRY +#endif + .macro apicinterrupt num sym do_sym +PUSH_SECTION_IRQENTRY apicinterrupt3 \num \sym \do_sym trace_apicinterrupt \num \sym +POP_SECTION_IRQENTRY .endm #ifdef CONFIG_SMP -- 2.13.5 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
