BUG: unable to handle page fault for address: fffff52004633200 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23ffed067 P4D 23ffed067 PUD 1c2b1067 PMD 0 Oops: Oops: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 17968 Comm: syz.6.2408 Tainted: G U L syzkaller #0 PREEMPT(full) Tainted: [U]=USER, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:fb_write_offset drivers/video/fbdev/core/sysmem.h:30 [inline] RIP: 0010:fb_bitmap_2ppw drivers/video/fbdev/core/fb_imageblit.h:364 [inline] RIP: 0010:fb_bitmap_imageblit drivers/video/fbdev/core/fb_imageblit.h:462 [inline] RIP: 0010:fb_imageblit drivers/video/fbdev/core/fb_imageblit.h:492 [inline] RIP: 0010:sys_imageblit+0x16c1/0x1d60 drivers/video/fbdev/core/sysimgblt.c:24 Code: 7c cd 00 48 89 fe 48 c1 ee 03 80 3c 1e 00 0f 85 aa 05 00 00 4d 63 f6 48 8b 8c cc 88 00 00 00 4f 8d 34 f7 4c 89 f6 48 c1 ee 03 <80> 3c 1e 00 0f 85 1b 03 00 00 49 89 0e 41 89 c6 8d 4d fd 41 c1 ee RSP: 0018:ffffc90012fdf560 EFLAGS: 00010a06 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 1ffff92004633200 RDI: ffffc90012fdf5e8 RBP: 0000000000000004 R08: 0000000000000005 R09: 0000000000000003 R10: 0000000000000008 R11: 0000000000000001 R12: ffff8880233dc871 R13: ffffc90012fdf5e8 R14: ffffc90023199000 R15: ffffc90023199000 FS: 00007f85d4c1d6c0(0000) GS:ffff8881246bd000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff52004633200 CR3: 000000007934e000 CR4: 00000000003526f0 Call Trace: drm_fbdev_shmem_defio_imageblit+0x20/0x130 drivers/gpu/drm/drm_fbdev_shmem.c:39 ccw_putcs_aligned drivers/video/fbdev/core/fbcon_ccw.c:125 [inline] ccw_putcs+0x92f/0xbb0 drivers/video/fbdev/core/fbcon_ccw.c:175 fbcon_putcs+0x3b2/0x480 drivers/video/fbdev/core/fbcon.c:1343 do_update_region+0x2cf/0x3f0 drivers/tty/vt/vt.c:628 redraw_screen+0x63f/0x760 drivers/tty/vt/vt.c:980 vc_do_resize+0xe1a/0x10f0 drivers/tty/vt/vt.c:1281 vt_ioctl+0x28fc/0x31a0 drivers/tty/vt/vt_ioctl.c:911 tty_ioctl+0x26a/0x1690 drivers/tty/tty_io.c:2792 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f85d3d9bf79 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:00007f85d4c1d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f85d4015fa0 RCX: 00007f85d3d9bf79 RDX: 0000000000000000 RSI: 0000000000005609 RDI: 0000000000000002 RBP: 00007f85d3e327e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f85d4016038 R14: 00007f85d4015fa0 R15: 00007ffcc028d8d8 Modules linked in: CR2: fffff52004633200 ---[ end trace 0000000000000000 ]--- RIP: 0010:fb_write_offset drivers/video/fbdev/core/sysmem.h:30 [inline] RIP: 0010:fb_bitmap_2ppw drivers/video/fbdev/core/fb_imageblit.h:364 [inline] RIP: 0010:fb_bitmap_imageblit drivers/video/fbdev/core/fb_imageblit.h:462 [inline] RIP: 0010:fb_imageblit drivers/video/fbdev/core/fb_imageblit.h:492 [inline] RIP: 0010:sys_imageblit+0x16c1/0x1d60 drivers/video/fbdev/core/sysimgblt.c:24 Code: 7c cd 00 48 89 fe 48 c1 ee 03 80 3c 1e 00 0f 85 aa 05 00 00 4d 63 f6 48 8b 8c cc 88 00 00 00 4f 8d 34 f7 4c 89 f6 48 c1 ee 03 <80> 3c 1e 00 0f 85 1b 03 00 00 49 89 0e 41 89 c6 8d 4d fd 41 c1 ee RSP: 0018:ffffc90012fdf560 EFLAGS: 00010a06 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 1ffff92004633200 RDI: ffffc90012fdf5e8 RBP: 0000000000000004 R08: 0000000000000005 R09: 0000000000000003 R10: 0000000000000008 R11: 0000000000000001 R12: ffff8880233dc871 R13: ffffc90012fdf5e8 R14: ffffc90023199000 R15: ffffc90023199000 FS: 00007f85d4c1d6c0(0000) GS:ffff8881246bd000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff52004633200 CR3: 000000007934e000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 7c cd jl 0xffffffcf 2: 00 48 89 add %cl,-0x77(%rax) 5: fe 48 c1 decb -0x3f(%rax) 8: ee out %al,(%dx) 9: 03 80 3c 1e 00 0f add 0xf001e3c(%rax),%eax f: 85 aa 05 00 00 4d test %ebp,0x4d000005(%rdx) 15: 63 f6 movsxd %esi,%esi 17: 48 8b 8c cc 88 00 00 mov 0x88(%rsp,%rcx,8),%rcx 1e: 00 1f: 4f 8d 34 f7 lea (%r15,%r14,8),%r14 23: 4c 89 f6 mov %r14,%rsi 26: 48 c1 ee 03 shr $0x3,%rsi * 2a: 80 3c 1e 00 cmpb $0x0,(%rsi,%rbx,1) <-- trapping instruction 2e: 0f 85 1b 03 00 00 jne 0x34f 34: 49 89 0e mov %rcx,(%r14) 37: 41 89 c6 mov %eax,%r14d 3a: 8d 4d fd lea -0x3(%rbp),%ecx 3d: 41 rex.B 3e: c1 .byte 0xc1 3f: ee out %al,(%dx)