On Wed, 18 Oct 2017 12:39:13 +0200 Borislav Petkov <b...@alien8.de> wrote:
> From: Borislav Petkov <b...@suse.de> > > Right now it says: > > static_key_disable_cpuslocked used before call to jump_label_init > ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 0 at kernel/jump_label.c:161 > static_key_disable_cpuslocked+0x68/0x70 > Modules linked in: > CPU: 0 PID: 0 Comm: swapper Not tainted 4.14.0-rc5+ #1 > Hardware name: SGI.COM C2112-4GP3/X10DRT-P-Series, BIOS 2.0a 05/09/2016 > task: ffffffff81c0e480 task.stack: ffffffff81c00000 > RIP: 0010:static_key_disable_cpuslocked+0x68/0x70 > RSP: 0000:ffffffff81c03ef0 EFLAGS: 00010096 ORIG_RAX: 0000000000000000 > RAX: 0000000000000041 RBX: ffffffff81c32680 RCX: ffffffff81c5cbf8 > RDX: 0000000000000001 RSI: 0000000000000092 RDI: 0000000000000002 > RBP: ffff88807fffd240 R08: 726f666562206465 R09: 0000000000000136 > R10: 0000000000000000 R11: 696e695f6c656261 R12: ffffffff82158900 > R13: ffffffff8215f760 R14: 0000000000000001 R15: 0000000000000008 > FS: 0000000000000000(0000) GS:ffff883f7f400000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: ffff88807ffff000 CR3: 0000000001c09000 CR4: 00000000000606b0 > Call Trace: > static_key_disable+0x16/0x20 > start_kernel+0x15a/0x45d > ? load_ucode_intel_bsp+0x11/0x2d > secondary_startup_64+0xa5/0xb0 > Code: 48 c7 c7 a0 15 cf 81 e9 47 53 4b 00 48 89 df e8 5f fc ff ff eb e8 48 > c7 c6 \ > c0 97 83 81 48 c7 c7 d0 ff a2 81 31 c0 e8 c5 9d f5 ff <0f> ff eb a7 0f > ff eb \ > b0 e8 eb a2 4b 00 53 48 89 fb e8 42 0e f0 > > but it doesn't tell me which key it is. So dump its address too: > > static_key_disable_cpuslocked, key ffffffff81c32680 used before call to > jump_label_init > > so that it can be found: > > $ objdump -D vmlinux | grep ffffffff81c32680 > ffffffff81c32680 <virt_spin_lock_key>: > ffffffff81c32680: 01 00 add %eax,(%rax) > > The problem is then obvious: > > smp_prepare_boot_cpu() -> > native_smp_prepare_boot_cpu()-> > native_pv_lock_init() > > which disables that key gets called before jump_label_init(). > > Signed-off-by: Borislav Petkov <b...@suse.de> > Acked-by: Steven Rostedt <rost...@goodmis.org> -- Steve
