general protection fault, probably for non-canonical address 0xfffc0000000000: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 6989 Comm: syz-executor196 Not tainted 5.8.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:update_pvclock_gtod arch/x86/kvm/x86.c:1710 [inline] RIP: 0010:pvclock_gtod_notify+0x11d/0x4d0 arch/x86/kvm/x86.c:7409 Code: 84 c0 74 08 3c 03 0f 8e 32 03 00 00 8b 43 18 48 8d 7b 1c 48 89 fa 48 c1 ea 03 89 05 55 d5 d9 0a 48 b8 00 00 00 00 00 fc ff 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 RSP: 0000:ffffc90000007be8 EFLAGS: 00010803 RAX: 00fffc0000000000 RBX: ffffffff8c91a9c0 RCX: 0000000000000001 RDX: 1ffffffff192353b RSI: 0000000000000008 RDI: ffffffff8c91a9dc RBP: ffffffff89b202a0 R08: 0000000000000000 R09: ffffffff8c59aa5f R10: fffffbfff18b354b R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff89ad40a0 FS: 000000000251f880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005562f1e1acd8 CR3: 000000008f60d000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 update_pvclock_gtod kernel/time/timekeeping.c:578 [inline] timekeeping_update+0x28a/0x4a0 kernel/time/timekeeping.c:672 timekeeping_advance+0x663/0x9a0 kernel/time/timekeeping.c:2119 tick_do_update_jiffies64.part.0+0x183/0x290 kernel/time/tick-sched.c:101 tick_do_update_jiffies64 kernel/time/tick-sched.c:64 [inline] tick_sched_do_timer kernel/time/tick-sched.c:147 [inline] tick_sched_timer+0x22c/0x290 kernel/time/tick-sched.c:1313 __run_hrtimer kernel/time/hrtimer.c:1520 [inline] __hrtimer_run_queues+0x1d5/0xfc0 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] sysvec_apic_timer_interrupt+0xe0/0x120 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:585 RIP: 0010:__readq arch/x86/include/asm/io.h:96 [inline] RIP: 0010:bitfill_aligned drivers/video/fbdev/core/cfbfillrect.c:79 [inline] RIP: 0010:bitfill_aligned+0x1b5/0x200 drivers/video/fbdev/core/cfbfillrect.c:35 Code: 85 b1 fd 83 fd ff 75 e0 4f 8d 6c fd 00 e8 c3 88 b1 fd 31 ff 4c 89 f6 e8 59 85 b1 fd 4d 85 f6 0f 84 fa fe ff ff e8 ab 88 b1 fd <49> 8b 45 00 48 31 c3 49 21 de 49 31 c6 4d 89 75 00 e9 df fe ff ff RSP: 0000:ffffc9000187f7c0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff83c233d7 RDX: ffff8880a14a2040 RSI: ffffffff83c233e5 RDI: 0000000000000007 RBP: 00000000ffffffff R08: 0000000000000a20 R09: 0000000000000040 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880010e52a8 R13: ffff8880010e52a8 R14: 00000000ffffffff R15: 0000000000000007 cfb_fillrect+0x40b/0x7b0 drivers/video/fbdev/core/cfbfillrect.c:327 vga16fb_fillrect+0x683/0x193b drivers/video/fbdev/vga16fb.c:951 bit_clear_margins+0x2d5/0x4a0 drivers/video/fbdev/core/bitblit.c:232 fbcon_clear_margins+0x1d5/0x230 drivers/video/fbdev/core/fbcon.c:1381 fbcon_do_set_font+0x7e2/0x950 drivers/video/fbdev/core/fbcon.c:2614 fbcon_set_font+0x767/0x8b0 drivers/video/fbdev/core/fbcon.c:2706 con_font_set drivers/tty/vt/vt.c:4571 [inline] con_font_op+0xd25/0x1110 drivers/tty/vt/vt.c:4636 vt_ioctl+0x1180/0x2670 drivers/tty/vt/vt_ioctl.c:928 tty_ioctl+0x1019/0x15f0 drivers/tty/tty_io.c:2656 vfs_ioctl fs/ioctl.c:48 [inline] ksys_ioctl+0x11a/0x180 fs/ioctl.c:753 __do_sys_ioctl fs/ioctl.c:762 [inline] __se_sys_ioctl fs/ioctl.c:760 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:760 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4419d9 Code: Bad RIP value. RSP: 002b:00007fff936a8de8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fff936a8f90 RCX: 00000000004419d9 RDX: 0000000020000580 RSI: 0000000000004b61 RDI: 0000000000000004 RBP: 0000000000000000 R08: 000000000000000e R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000402630 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 02b758f73a07e909 ]--- RIP: 0010:update_pvclock_gtod arch/x86/kvm/x86.c:1710 [inline] RIP: 0010:pvclock_gtod_notify+0x11d/0x4d0 arch/x86/kvm/x86.c:7409 Code: 84 c0 74 08 3c 03 0f 8e 32 03 00 00 8b 43 18 48 8d 7b 1c 48 89 fa 48 c1 ea 03 89 05 55 d5 d9 0a 48 b8 00 00 00 00 00 fc ff 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 RSP: 0000:ffffc90000007be8 EFLAGS: 00010803 RAX: 00fffc0000000000 RBX: ffffffff8c91a9c0 RCX: 0000000000000001 RDX: 1ffffffff192353b RSI: 0000000000000008 RDI: ffffffff8c91a9dc RBP: ffffffff89b202a0 R08: 0000000000000000 R09: ffffffff8c59aa5f R10: fffffbfff18b354b R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff89ad40a0 FS: 000000000251f880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005562f1e1acd8 CR3: 000000008f60d000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400