When 'CONFIG_AMD_MEM_ENCRYPT' is not set, the IDT handler for #VC is not registered, but the address of the #VC IST stack is still set in tss_setup_ist(). Therefore, the name of the associated exception stack is "UNKNOWN" instead of "VC". Although the base of the exception stack is not zero and is available, it is not accessible, which will cause the backtrace to fail when attempting to access the #VC stack. To fix this, remove the name check. Signe-off-by: Hou Wenlong <houwenlong.hwl(a)antgroup.com&gt; --- x86_64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/x86_64.c b/x86_64.c index e7f8fe25b31f..ee12ba095e6e 100644 --- a/x86_64.c +++ b/x86_64.c @@ -1540,7 +1540,7 @@ x86_64_ist_init(void) ms->stkinfo.available[c][i] = TRUE; /* VC stack can be unmapped if SEV-ES is disabled or not supported. */ - if (STREQ(ms->stkinfo.exception_stacks[i], "VC") && + if (ms->stkinfo.ebase[c][i] && !accessible(ms->stkinfo.ebase[c][i]))

ms->stkinfo.available[c][i] = FALSE; } base-commit: f13853cef53f5c5463a51021edbc81977e2b1405 -- 2.31.1 -- Crash-utility mailing list -- devel(a)lists.crash-utility.osci.io To unsubscribe send an email to devel-leave(a)lists.crash-utility.osci.io https://${domain_name}/admin/lists/devel.lists.crash-utility.osci.io/ Contribution Guidelines: https://github.com/crash-utility/crash/wiki