> [ 6402.786418] ------------[ cut here ]------------ > [ 6402.787769] WARNING: CPU: 0 PID: 13802 at arch/x86/kernel/traps.c:811 > do_debug+0x16c/0x210 ...
> [ 6402.848299] ? trace_hardirqs_off_thunk+0x1a/0x33 > [ 6402.849593] trace_hardirqs_off_caller+0xa6/0xd0 > [ 6402.850862] ? debug+0x4e/0x70 > [ 6402.851727] trace_hardirqs_off_thunk+0x1a/0x33 > [ 6402.852983] debug+0x53/0x70 > [ 6402.853785] RIP: 0033:0x400060dd So this is a check that checks if you're running in user mode if you have a debug trap with single step, but somehow it triggered for a user segment. Probably the regs got corrupted. Sasha, I suspect you're missing a mov %rsp,%rdi somewhere in the debug entry path that sets up the regs argument for the C code. -Andi
