Hello, The following program triggers WARNING in __x86_set_memory_region: // autogenerated by syzkaller (http://github.com/google/syzkaller) #include <unistd.h> #include <sys/syscall.h> #include <string.h> #include <stdint.h> long r[8]; int main() { memset(r, -1, sizeof(r)); r[0] = syscall(SYS_mmap, 0x20000000ul, 0x1000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); memcpy((void*)0x20000000, "\x2f\x64\x65\x76\x2f\x6b\x76\x6d", 8); r[2] = syscall(SYS_open, 0x20000000ul, 0x200ul, 0x0ul, 0, 0, 0); r[3] = syscall(SYS_ioctl, r[2], 0xae01ul, 0x0ul, 0, 0, 0); *(uint64_t*)0x20000000 = (uint64_t)0x440; r[5] = syscall(SYS_ioctl, r[3], 0xae47ul, 0x20000000ul, 0, 0, 0); *(uint64_t*)0x20000000 = (uint64_t)0x1; r[7] = syscall(SYS_ioctl, r[3], 0xae47ul, 0x20000000ul, 0, 0, 0); return 0; } ------------[ cut here ]------------ WARNING: CPU: 3 PID: 7265 at arch/x86/kvm/x86.c:7703 __x86_set_memory_region+0x4b9/0x500() Modules linked in: CPU: 3 PID: 7265 Comm: syz-executor Tainted: G W 4.4.0-rc8+ #211 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 00000000ffffffff ffff8800351d7720 ffffffff82907ccd 0000000000000000 ffff880033f81780 ffffffff85ed4540 ffff8800351d7760 ffffffff8133f979 ffffffff8103d8a9 ffffffff85ed4540 0000000000001e17 00000000000001fd Call Trace: [< inline >] __dump_stack lib/dump_stack.c:15 [<ffffffff82907ccd>] dump_stack+0x6f/0xa2 lib/dump_stack.c:50 [<ffffffff8133f979>] warn_slowpath_common+0xd9/0x140 kernel/panic.c:460 [<ffffffff8133fba9>] warn_slowpath_null+0x29/0x30 kernel/panic.c:493 [<ffffffff8103d8a9>] __x86_set_memory_region+0x4b9/0x500 arch/x86/kvm/x86.c:7703 [<ffffffff8103d92e>] x86_set_memory_region+0x3e/0x60 arch/x86/kvm/x86.c:7749 [<ffffffff810fc0f9>] vmx_set_tss_addr+0x79/0x2a0 arch/x86/kvm/vmx.c:5101 [< inline >] kvm_vm_ioctl_set_tss_addr arch/x86/kvm/x86.c:3477 [<ffffffff8105a90b>] kvm_arch_vm_ioctl+0xecb/0x1db0 arch/x86/kvm/x86.c:3744 [<ffffffff8101ff4c>] kvm_vm_ioctl+0x17c/0xf30 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2902 [< inline >] vfs_ioctl fs/ioctl.c:43 [<ffffffff817b66f1>] do_vfs_ioctl+0x681/0xe40 fs/ioctl.c:607 [< inline >] SYSC_ioctl fs/ioctl.c:622 [<ffffffff817b6f3f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:613 [<ffffffff85e77af6>] entry_SYSCALL_64_fastpath+0x16/0x7a arch/x86/entry/entry_64.S:185 ---[ end trace 6d1cb7e02f836554 ]--- On commit b06f3a168cdcd80026276898fd1fee443ef25743 (Jan 6). -- 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
