Re: [Crash-utility] [PATCH] ppc64: fix bt for secondary threads for NMI IPIs

With latest NMI IPI changes, crash_ipi_callback is found multiple times on the stack. Ensure the chosen symbol relates to an actual backtrace.

Signed-off-by: Hari Bathini <hbathini(a)linux.vnet.ibm.com&gt; --- ppc64.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/ppc64.c b/ppc64.c index 672ee60..0b04187 100644 --- a/ppc64.c +++ b/ppc64.c @@ -2337,6 +2337,14 @@ retry: *nip = *up; *ksp = bt->stackbase + ((char *)(up) - 16 - bt->stackbuf); + /* + * Check whether this symbol relates to a + * backtrace or not + */ + ur_ksp = *(ulong *)&bt->stackbuf[(*ksp) - bt->stackbase]; + if (!INSTACK(ur_ksp, bt)) + continue; + return TRUE; } }