x86/dumpstack: Fix off-by-one errors in stack identification

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The get_stack_info() function is off-by-one when checking whether an
address is on a IRQ stack or a IST stack. This prevents an overflowed
IRQ or IST stack from being dumped properly.

[ tglx: Do the same for 32-bit ]

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190414160143.785651055@linutronix.de

...

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Andy Lutomirski 2019-04-14 17:59:39 +02:00 • committed by Borislav Petkov

parent 7dbcf2b0b7

commit fa33215422

2 changed files with 4 additions and 4 deletions

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4

arch/x86/kernel/dumpstack_32.c

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4

arch/x86/kernel/dumpstack_64.c

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