Hello, syzbot found the following issue on: HEAD commit: 7246f4dcaccc tools/lib/lockdep: drop liblockdep git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1297f26eb00000 kernel config: https://syzkaller.appspot.com/x/.config?x=9d7259f0deb293aa dashboard link: https://syzkaller.appspot.com/bug?extid=ae494efef39fa113ab5b compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ae494efef39fa113ab5b@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 0 PID: 25218 at arch/x86/kvm/../../../virt/kvm/dirty_ring.c:164 kvm_dirty_ring_push+0x3bf/0x490 arch/x86/kvm/../../../virt/kvm/dirty_ring.c:164 Modules linked in: CPU: 0 PID: 25218 Comm: syz-executor.1 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kvm_dirty_ring_push+0x3bf/0x490 arch/x86/kvm/../../../virt/kvm/dirty_ring.c:164 Code: 00 48 c7 c2 c0 4b 82 89 be 7a 01 00 00 48 c7 c7 00 4d 82 89 c6 05 66 7c 51 0c 01 e8 2a 17 ed 07 e9 76 ff ff ff e8 81 07 6d 00 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 0f b6 04 RSP: 0018:ffffc9001814f690 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000400 RCX: ffffc9000ab83000 RDX: 0000000000040000 RSI: ffffffff810abeef RDI: 0000000000000003 RBP: ffff888033a8a1b8 R08: 0000000000000400 R09: 0000000000000001 R10: ffffffff810abbd3 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000400 R15: ffff888033a8a1c0 FS: 00007f02f9b0c700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000003b0be000 CR4: 00000000003526f0 Call Trace: <TASK> mark_page_dirty_in_slot arch/x86/kvm/../../../virt/kvm/kvm_main.c:3090 [inline] mark_page_dirty_in_slot arch/x86/kvm/../../../virt/kvm/kvm_main.c:3081 [inline] __kvm_write_guest_page+0x2e3/0x3b0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2875 kvm_vcpu_write_guest_page arch/x86/kvm/../../../virt/kvm/kvm_main.c:2893 [inline] kvm_vcpu_write_guest+0x88/0x120 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2927 emulator_write_phys arch/x86/kvm/x86.c:6674 [inline] write_emulate+0x2f/0x70 arch/x86/kvm/x86.c:6714 emulator_read_write_onepage+0x3bb/0xb30 arch/x86/kvm/x86.c:6782 emulator_read_write+0x1c4/0x5a0 arch/x86/kvm/x86.c:6837 segmented_write.isra.0+0xee/0x140 arch/x86/kvm/emulate.c:1391 writeback+0x612/0x950 arch/x86/kvm/emulate.c:1753 x86_emulate_insn+0x19f5/0x39c0 arch/x86/kvm/emulate.c:5626 x86_emulate_instruction+0x714/0x1460 arch/x86/kvm/x86.c:8058 handle_io arch/x86/kvm/vmx/vmx.c:4934 [inline] handle_io+0x11d/0x1d0 arch/x86/kvm/vmx/vmx.c:4922 __vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6066 [inline] vmx_handle_exit+0x4be/0x1860 arch/x86/kvm/vmx/vmx.c:6083 vcpu_enter_guest+0x2b2c/0x4410 arch/x86/kvm/x86.c:9878 vcpu_run arch/x86/kvm/x86.c:9945 [inline] kvm_arch_vcpu_ioctl_run+0x4fc/0x21a0 arch/x86/kvm/x86.c:10140 kvm_vcpu_ioctl+0x570/0xf30 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3787 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f02fc596ae9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f02f9b0c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f02fc6a9f60 RCX: 00007f02fc596ae9 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006 RBP: 00007f02fc5f0f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f02fcbddb2f R14: 00007f02f9b0c300 R15: 0000000000022000 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
