On Thu, Mar 31, 2022 at 8:46 PM Sean Christopherson <seanjc@xxxxxxxxxx> wrote: > > On Thu, Mar 31, 2022, Sean Christopherson wrote: > > On Wed, Mar 30, 2022, Jan Stancek wrote: > > > +CC kvm > > > > > > Issue seems to be that nx_huge_pages is not initialized (-1) and > > > attempted to be used as boolean when reading > > > /sys/module/kvm/parameters/nx_huge_pages > > > > Ugh, CONFIG_UBSAN_BOOL=y complains about a bool not being 0 or 1. What a pain. > > Side topic, any idea why your traces don't have the UBSAN output? I verified I guess that's because CONFIG_UBSAN_TRAP=y is also set. # grep UBSAN -r .config CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y CONFIG_UBSAN=y CONFIG_UBSAN_TRAP=y CONFIG_CC_HAS_UBSAN_BOUNDS=y CONFIG_UBSAN_BOUNDS=y CONFIG_UBSAN_ONLY_BOUNDS=y CONFIG_UBSAN_SHIFT=y # CONFIG_UBSAN_DIV_ZERO is not set CONFIG_UBSAN_BOOL=y CONFIG_UBSAN_ENUM=y CONFIG_UBSAN_SANITIZE_ALL=y # CONFIG_TEST_UBSAN is not set > that it's not a panic_on_warn thing. Having the UBSAN output in future bug reports > would be very helpful. > > [ 13.150244] ================================================================================ > [ 13.150780] UBSAN: invalid-load in kernel/params.c:320:33 > [ 13.151192] load of value 255 is not a valid value for type '_Bool' > [ 13.152079] ================================================================================ >
