On Wed, 10 Jan 2018, Josh Poimboeuf wrote: > For the crash, you might try enabling CONFIG_DEBUG_ENTRY and seeing if > that gives you any output.
I did enable that, didn't seem to help on the haswell machien at least. > > > > WARNING: can't dereference iret registers at 000000000783fea8 for ip > > > > paranoid_entry+0x2e/0x90 > > > > WARNING: can't dereference registers at 00000000f0698d17 for ip > > > > paranoid_entry+0x4c/0x90 > > > > WARNING: stack going in the wrong direction? > > > > ip=native_sched_clock+0x9/0x90 > > This all looks very weird. The stack pointers -- 000000000783fea8 and > 00000000f0698d17 -- are obviously very wrong. I will try to recreate > locally. On a related note, on a core2 machine with the perf_fuzzer I got this too: Jan 11 13:44:01 core2 kernel: [ 1078.931403] WARNING: stack recursion on stack type 4 Jan 11 13:44:01 core2 kernel: [ 1078.931411] WARNING: can't dereference registers at 000000002c6beb99 for ip swapgs_restore_regs_and_return_to_usermode+0x2b/0x7c Vince
