28 lines
1.2 KiB
Diff
28 lines
1.2 KiB
Diff
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commit 1926150ee350e17fee2aeabb8ef781222d94366e
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Author: Dave Anderson <anderson@redhat.com>
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Date: Mon Jun 11 13:46:41 2018 -0400
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Fix for the ppc64/ppc64le "bt" command on Linux 4.7 and later kernels
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that contain commit d8bff643d81a58181356c0aa3ab771ac10da6894,
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titled "[x86] asm: Make sure verify_cpu() has a good stack", which
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inadvertently breaks the ppc64/ppc64le kernel stack size calculation
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when running with crash-7.2.2 or later. Without the patch, "bt" may
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fail with a filtered kdump dumpfile with the two error messages
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"bt: page excluded: kernel virtual address: <address> type: stack
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contents" and "bt: read of stack at <address> failed".
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(anderson@redhat.com)
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diff --git a/task.c b/task.c
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index f6956d5..1b32629 100644
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--- a/task.c
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+++ b/task.c
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@@ -440,7 +440,7 @@ task_init(void)
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} else if (VALID_SIZE(thread_union) &&
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((len = SIZE(thread_union)) != STACKSIZE())) {
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machdep->stacksize = len;
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- } else {
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+ } else if (!VALID_SIZE(thread_union) && !VALID_SIZE(task_union)) {
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if (kernel_symbol_exists("__start_init_task") &&
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kernel_symbol_exists("__end_init_task")) {
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len = symbol_value("__end_init_task");
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