BUG: unable to handle page fault for address: ffffc90004b51000 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 1ac00067 P4D 1ac00067 PUD 1be85067 PMD 21a60067 PTE 0 Oops: Oops: 0002 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 14530 Comm: syz.1.2448 Not tainted 6.13.0-rc1-syzkaller-00337-g7503345ac5f5 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:memset64 arch/x86/include/asm/string_64.h:60 [inline] RIP: 0010:memset_l include/linux/string.h:240 [inline] RIP: 0010:bitfill_aligned drivers/video/fbdev/core/sysfillrect.c:53 [inline] RIP: 0010:bitfill_aligned+0x183/0x210 drivers/video/fbdev/core/sysfillrect.c:25 Code: 44 24 08 48 31 d0 49 89 45 f8 44 89 e0 29 e8 29 c3 e8 b1 1e b7 fc 89 d8 31 d2 4c 89 ef 41 f7 f4 48 89 c3 48 89 c1 48 8b 04 24 <f3> 48 ab 31 ff 4c 89 f6 e8 00 21 b7 fc 4d 85 f6 0f 84 6a ff ff ff RSP: 0018:ffffc90003eef5c8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000280 RCX: 0000000000000080 RDX: 0000000000000000 RSI: ffffffff84e221cf RDI: ffffc90004b51000 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000040 R13: ffffc90004b50000 R14: 0000000000000000 R15: 000000000000a000 FS: 0000000000000000(0000) GS:ffff88802b400000(0063) knlGS:00000000f5115b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffffc90004b51000 CR3: 000000004bb38000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> sys_fillrect+0x47b/0x900 drivers/video/fbdev/core/sysfillrect.c:284 drm_fbdev_shmem_defio_fillrect+0x22/0x140 drivers/gpu/drm/drm_fbdev_shmem.c:37 bit_clear_margins+0x302/0x4f0 drivers/video/fbdev/core/bitblit.c:232 fbcon_clear_margins.constprop.0+0x1d0/0x290 drivers/video/fbdev/core/fbcon.c:1319 fbcon_switch+0xa30/0x14f0 drivers/video/fbdev/core/fbcon.c:2190 redraw_screen+0x2bf/0x760 drivers/tty/vt/vt.c:957 fbcon_set_disp+0x7cc/0xe00 drivers/video/fbdev/core/fbcon.c:1412 con2fb_init_display drivers/video/fbdev/core/fbcon.c:812 [inline] set_con2fb_map+0x6fd/0x1060 drivers/video/fbdev/core/fbcon.c:885 fbcon_set_con2fb_map_ioctl+0x16d/0x220 drivers/video/fbdev/core/fbcon.c:3112 do_fb_ioctl+0x32a/0x7d0 drivers/video/fbdev/core/fb_chrdev.c:138 fb_compat_ioctl+0x55f/0x670 drivers/video/fbdev/core/fb_chrdev.c:293 __do_compat_sys_ioctl+0x1cb/0x2c0 fs/ioctl.c:1004 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7faf579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f511557c EFLAGS: 00000292 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 0000000000004610 RDX: 00000000200000c0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Modules linked in: CR2: ffffc90004b51000 ---[ end trace 0000000000000000 ]--- RIP: 0010:memset64 arch/x86/include/asm/string_64.h:60 [inline] RIP: 0010:memset_l include/linux/string.h:240 [inline] RIP: 0010:bitfill_aligned drivers/video/fbdev/core/sysfillrect.c:53 [inline] RIP: 0010:bitfill_aligned+0x183/0x210 drivers/video/fbdev/core/sysfillrect.c:25 Code: 44 24 08 48 31 d0 49 89 45 f8 44 89 e0 29 e8 29 c3 e8 b1 1e b7 fc 89 d8 31 d2 4c 89 ef 41 f7 f4 48 89 c3 48 89 c1 48 8b 04 24 <f3> 48 ab 31 ff 4c 89 f6 e8 00 21 b7 fc 4d 85 f6 0f 84 6a ff ff ff RSP: 0018:ffffc90003eef5c8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000280 RCX: 0000000000000080 RDX: 0000000000000000 RSI: ffffffff84e221cf RDI: ffffc90004b51000 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000040 R13: ffffc90004b50000 R14: 0000000000000000 R15: 000000000000a000 FS: 0000000000000000(0000) GS:ffff88802b400000(0063) knlGS:00000000f5115b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffffc90004b51000 CR3: 000000004bb38000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 44 24 08 rex.R and $0x8,%al 3: 48 31 d0 xor %rdx,%rax 6: 49 89 45 f8 mov %rax,-0x8(%r13) a: 44 89 e0 mov %r12d,%eax d: 29 e8 sub %ebp,%eax f: 29 c3 sub %eax,%ebx 11: e8 b1 1e b7 fc call 0xfcb71ec7 16: 89 d8 mov %ebx,%eax 18: 31 d2 xor %edx,%edx 1a: 4c 89 ef mov %r13,%rdi 1d: 41 f7 f4 div %r12d 20: 48 89 c3 mov %rax,%rbx 23: 48 89 c1 mov %rax,%rcx 26: 48 8b 04 24 mov (%rsp),%rax * 2a: f3 48 ab rep stos %rax,%es:(%rdi) <-- trapping instruction 2d: 31 ff xor %edi,%edi 2f: 4c 89 f6 mov %r14,%rsi 32: e8 00 21 b7 fc call 0xfcb72137 37: 4d 85 f6 test %r14,%r14 3a: 0f 84 6a ff ff ff je 0xffffffaa