Hello, The following program triggers WARNING in kvm_arch_vcpu_ioctl_run in run in parallel loop: https://gist.githubusercontent.com/dvyukov/08091eee6f38548ff9e6905c5e0eaaee/raw/8cae95f2e88eeb98c4ddc06d227670c1e248222f/gistfile1.txt On commit e234832afb623fe5c7d1d5703d6619494d8d703f (Nov 13) WARNING: CPU: 3 PID: 11141 at arch/x86/kvm/x86.c:6984 kvm_arch_vcpu_ioctl_run+0x1f0/0x4f50 CPU: 3 PID: 11141 Comm: syz-executor Not tainted 4.9.0-rc5+ #24 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 ffff880039cef698 ffffffff834c3959 ffffffff00000003 1ffff1000739de66 ffffed000739de5e 0000000041b58ab3 ffffffff89576450 ffffffff834c366b 0000000041b58ab3 ffffffff894d2830 ffffffff81590020 ffffffff810d90f0 Call Trace: [< inline >] __dump_stack lib/dump_stack.c:15 [<ffffffff834c3959>] dump_stack+0x2ee/0x3f5 lib/dump_stack.c:51 [<ffffffff81849908>] panic+0x200/0x425 kernel/panic.c:179 [<ffffffff813fd919>] __warn+0x1c9/0x1e0 kernel/panic.c:542 [<ffffffff813fdb81>] warn_slowpath_null+0x31/0x40 kernel/panic.c:585 [<ffffffff810ee930>] kvm_arch_vcpu_ioctl_run+0x1f0/0x4f50 arch/x86/kvm/x86.c:6984 [<ffffffff8107b328>] kvm_vcpu_ioctl+0x678/0x11c0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2557 [< inline >] vfs_ioctl fs/ioctl.c:43 [<ffffffff81abdb44>] do_vfs_ioctl+0x1c4/0x1630 fs/ioctl.c:679 [< inline >] SYSC_ioctl fs/ioctl.c:694 [<ffffffff81abf044>] SyS_ioctl+0x94/0xc0 fs/ioctl.c:685 [<ffffffff88144885>] entry_SYSCALL_64_fastpath+0x23/0xc6 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
