BUG: unable to handle page fault for address: fffff520048be1a8 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23fff5067 P4D 23fff5067 PUD 1cafa067 PMD 54460067 PTE 0 Oops: Oops: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 3033 Comm: syz.1.13984 Tainted: G U L syzkaller #0 PREEMPT(full) Tainted: [U]=USER, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:fb_read_offset drivers/video/fbdev/core/sysmem.h:38 [inline] RIP: 0010:fb_bitblit drivers/video/fbdev/core/fb_imageblit.h:137 [inline] RIP: 0010:fb_bitmap1x_imageblit drivers/video/fbdev/core/fb_imageblit.h:275 [inline] RIP: 0010:fb_bitmap_imageblit drivers/video/fbdev/core/fb_imageblit.h:477 [inline] RIP: 0010:fb_imageblit drivers/video/fbdev/core/fb_imageblit.h:492 [inline] RIP: 0010:sys_imageblit+0x14c1/0x1d60 drivers/video/fbdev/core/sysimgblt.c:24 Code: 31 c5 48 89 d8 48 c1 e8 03 42 80 3c 38 00 0f 85 66 07 00 00 48 89 2b e9 68 f4 ff ff e8 48 13 a0 fc 48 8b 44 24 10 48 c1 e8 03 <42> 80 3c 38 00 0f 85 00 07 00 00 48 8b 44 24 10 0f b6 4c 24 20 48 RSP: 0018:ffffc9000559f7a8 EFLAGS: 00010a02 RAX: 1ffff920048be1a8 RBX: 0000000000000020 RCX: ffffc90006a42000 RDX: 0000000000080000 RSI: ffffffff856918f8 RDI: ffff888026d0dd00 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000020 R11: 0000000000000000 R12: ffff8880273f48f0 R13: 0000000000000010 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007ffa0a7da6c0(0000) GS:ffff888123df8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff520048be1a8 CR3: 00000000347ca000 CR4: 00000000003526f0 Call Trace: drm_fbdev_shmem_defio_imageblit+0x20/0x130 drivers/gpu/drm/drm_fbdev_shmem.c:39 soft_cursor+0x524/0xa10 drivers/video/fbdev/core/softcursor.c:74 cw_cursor+0xd70/0x15b0 drivers/video/fbdev/core/fbcon_cw.c:324 fbcon_cursor+0x43c/0x5e0 drivers/video/fbdev/core/fbcon.c:1427 hide_cursor+0x87/0x230 drivers/tty/vt/vt.c:883 putconsxy+0x1f/0x3c0 drivers/tty/vt/vt.c:5088 vcs_write_buf drivers/tty/vt/vc_screen.c:530 [inline] vcs_write+0xbd5/0xd70 drivers/tty/vt/vc_screen.c:674 vfs_write+0x2aa/0x1050 fs/read_write.c:685 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x840 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ffa0999de59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffa0a7da028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ffa09c25fa0 RCX: 00007ffa0999de59 RDX: 0000000020000003 RSI: 0000200000000000 RDI: 0000000000000003 RBP: 00007ffa09a33e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffa09c26038 R14: 00007ffa09c25fa0 R15: 00007ffe427a4ac8 Modules linked in: CR2: fffff520048be1a8 ---[ end trace 0000000000000000 ]--- RIP: 0010:fb_read_offset drivers/video/fbdev/core/sysmem.h:38 [inline] RIP: 0010:fb_bitblit drivers/video/fbdev/core/fb_imageblit.h:137 [inline] RIP: 0010:fb_bitmap1x_imageblit drivers/video/fbdev/core/fb_imageblit.h:275 [inline] RIP: 0010:fb_bitmap_imageblit drivers/video/fbdev/core/fb_imageblit.h:477 [inline] RIP: 0010:fb_imageblit drivers/video/fbdev/core/fb_imageblit.h:492 [inline] RIP: 0010:sys_imageblit+0x14c1/0x1d60 drivers/video/fbdev/core/sysimgblt.c:24 Code: 31 c5 48 89 d8 48 c1 e8 03 42 80 3c 38 00 0f 85 66 07 00 00 48 89 2b e9 68 f4 ff ff e8 48 13 a0 fc 48 8b 44 24 10 48 c1 e8 03 <42> 80 3c 38 00 0f 85 00 07 00 00 48 8b 44 24 10 0f b6 4c 24 20 48 RSP: 0018:ffffc9000559f7a8 EFLAGS: 00010a02 RAX: 1ffff920048be1a8 RBX: 0000000000000020 RCX: ffffc90006a42000 RDX: 0000000000080000 RSI: ffffffff856918f8 RDI: ffff888026d0dd00 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000020 R11: 0000000000000000 R12: ffff8880273f48f0 R13: 0000000000000010 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007ffa0a7da6c0(0000) GS:ffff888123df8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff520048be1a8 CR3: 00000000347ca000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 31 c5 xor %eax,%ebp 2: 48 89 d8 mov %rbx,%rax 5: 48 c1 e8 03 shr $0x3,%rax 9: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) e: 0f 85 66 07 00 00 jne 0x77a 14: 48 89 2b mov %rbp,(%rbx) 17: e9 68 f4 ff ff jmp 0xfffff484 1c: e8 48 13 a0 fc call 0xfca01369 21: 48 8b 44 24 10 mov 0x10(%rsp),%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2f: 0f 85 00 07 00 00 jne 0x735 35: 48 8b 44 24 10 mov 0x10(%rsp),%rax 3a: 0f b6 4c 24 20 movzbl 0x20(%rsp),%ecx 3f: 48 rex.W