BUG: unable to handle page fault for address: fffff52000a44300 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23ffee067 P4D 23ffee067 PUD 16dd0067 PMD 20fc6067 PTE 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 5854 Comm: syz.2.373 Tainted: G S syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:fast_imageblit drivers/video/fbdev/core/sysimgblt.c:257 [inline] RIP: 0010:sys_imageblit+0x1885/0x25d0 drivers/video/fbdev/core/sysimgblt.c:323 Code: 89 74 24 10 0f 85 e8 02 00 00 0f b6 46 ff c1 e8 07 21 d0 8b 9c 84 c0 00 00 00 4c 8b 7c 24 30 4b 8d 3c 37 48 89 f8 48 c1 e8 03 <0f> b6 04 08 84 c0 0f 85 f8 02 00 00 43 89 1c 37 0f b6 46 ff c1 e8 RSP: 0018:ffffc9000345f060 EFLAGS: 00010a06 RAX: 1ffff92000a44300 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000000001 RSI: ffff888147351501 RDI: ffffc90005221800 RBP: ffffc9000345f1e0 R08: ffff88802a82d940 R09: 0000000000000003 R10: 0000000000000004 R11: 0000000000000002 R12: 0000000000000008 R13: 1ffff11028e6a2a0 R14: 0000000000000000 R15: ffffc90005221800 FS: 00007f78999ff6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff52000a44300 CR3: 0000000024a4c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: drm_fb_helper_sys_imageblit+0x2e/0x510 drivers/gpu/drm/drm_fb_helper.c:793 soft_cursor+0x9fd/0xc30 drivers/video/fbdev/core/softcursor.c:74 bit_cursor+0x1699/0x1f00 drivers/video/fbdev/core/bitblit.c:404 hide_cursor+0x7f/0x320 drivers/tty/vt/vt.c:907 do_con_write+0x1dd/0x6c40 drivers/tty/vt/vt.c:2927 con_put_char+0x7f/0xc0 drivers/tty/vt/vt.c:3303 tty_put_char+0xc5/0x150 drivers/tty/tty_io.c:3178 do_output_char+0x691/0x960 drivers/tty/n_tty.c:485 process_output drivers/tty/n_tty.c:511 [inline] n_tty_write+0xdc3/0x1220 drivers/tty/n_tty.c:2351 do_tty_write drivers/tty/tty_io.c:1038 [inline] file_tty_write+0x50c/0x8a0 drivers/tty/tty_io.c:1110 call_write_iter include/linux/fs.h:2173 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x748/0xd70 fs/read_write.c:594 ksys_write+0x153/0x260 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f789b7c80d9 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:00007f78999ff028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f789ba50090 RCX: 00007f789b7c80d9 RDX: 0000000000001006 RSI: 0000200000000e00 RDI: 0000000000000007 RBP: 00007f789b85f024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f789ba50128 R14: 00007f789ba50090 R15: 00007ffe80f843c8 Modules linked in: CR2: fffff52000a44300 ---[ end trace 0b7c9bb99c691505 ]--- RIP: 0010:fast_imageblit drivers/video/fbdev/core/sysimgblt.c:257 [inline] RIP: 0010:sys_imageblit+0x1885/0x25d0 drivers/video/fbdev/core/sysimgblt.c:323 Code: 89 74 24 10 0f 85 e8 02 00 00 0f b6 46 ff c1 e8 07 21 d0 8b 9c 84 c0 00 00 00 4c 8b 7c 24 30 4b 8d 3c 37 48 89 f8 48 c1 e8 03 <0f> b6 04 08 84 c0 0f 85 f8 02 00 00 43 89 1c 37 0f b6 46 ff c1 e8 RSP: 0018:ffffc9000345f060 EFLAGS: 00010a06 RAX: 1ffff92000a44300 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000000001 RSI: ffff888147351501 RDI: ffffc90005221800 RBP: ffffc9000345f1e0 R08: ffff88802a82d940 R09: 0000000000000003 R10: 0000000000000004 R11: 0000000000000002 R12: 0000000000000008 R13: 1ffff11028e6a2a0 R14: 0000000000000000 R15: ffffc90005221800 FS: 00007f78999ff6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff52000a44300 CR3: 0000000024a4c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 89 74 24 10 mov %esi,0x10(%rsp) 4: 0f 85 e8 02 00 00 jne 0x2f2 a: 0f b6 46 ff movzbl -0x1(%rsi),%eax e: c1 e8 07 shr $0x7,%eax 11: 21 d0 and %edx,%eax 13: 8b 9c 84 c0 00 00 00 mov 0xc0(%rsp,%rax,4),%ebx 1a: 4c 8b 7c 24 30 mov 0x30(%rsp),%r15 1f: 4b 8d 3c 37 lea (%r15,%r14,1),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 f8 02 00 00 jne 0x32e 36: 43 89 1c 37 mov %ebx,(%r15,%r14,1) 3a: 0f b6 46 ff movzbl -0x1(%rsi),%eax 3e: c1 .byte 0xc1 3f: e8 .byte 0xe8