Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 1 UID: 0 PID: 9219 Comm: syz.3.889 Not tainted 6.14.0-syzkaller-12508-g92b71befc349 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:fb_videomode_to_var+0x2e/0x5f0 drivers/video/fbdev/core/modedb.c:905 Code: 55 41 57 41 56 41 55 41 54 53 49 89 f6 49 89 fc 49 bd 00 00 00 00 00 fc ff df e8 cd 65 6a fc 4d 8d 7e 0c 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 ca 02 00 00 41 8b 1f 4c 89 e0 48 c1 e8 RSP: 0018:ffffc90002f47288 EFLAGS: 00010203 RAX: 0000000000000001 RBX: ffff8881423c2368 RCX: 0000000000080000 RDX: ffffc9000c7ec000 RSI: 00000000000034e3 RDI: 00000000000034e4 RBP: ffffc90002f47570 R08: ffffffff8558fde3 R09: ffffffff855aed19 R10: 0000000000000002 R11: ffff888022be0000 R12: ffffc90002f47440 R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000000c FS: 0000000000000000(0000) GS:ffff888125099000(0063) knlGS:00000000f5096b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000031219ffc CR3: 000000005c7ea000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: display_to_var drivers/video/fbdev/core/fbcon.c:923 [inline] fbcon_resize+0x685/0x18f0 drivers/video/fbdev/core/fbcon.c:2060 resize_screen drivers/tty/vt/vt.c:1112 [inline] vc_do_resize+0x7da/0x18b0 drivers/tty/vt/vt.c:1192 vc_resize include/linux/vt_kern.h:49 [inline] fbcon_set_all_vcs+0x79f/0xbf0 drivers/video/fbdev/core/fbcon.c:2723 do_fb_ioctl+0x74c/0x7e0 drivers/video/fbdev/core/fb_chrdev.c:92 fb_compat_ioctl+0x2d8/0xce0 drivers/video/fbdev/core/fb_chrdev.c:293 __do_compat_sys_ioctl fs/ioctl.c:1004 [inline] __se_compat_sys_ioctl+0x50e/0xc30 fs/ioctl.c:947 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xb4/0x110 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:331 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7f71579 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 90 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f509655c EFLAGS: 00000206 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000004601 RDX: 00000000800001c0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:fb_videomode_to_var+0x2e/0x5f0 drivers/video/fbdev/core/modedb.c:905 Code: 55 41 57 41 56 41 55 41 54 53 49 89 f6 49 89 fc 49 bd 00 00 00 00 00 fc ff df e8 cd 65 6a fc 4d 8d 7e 0c 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 ca 02 00 00 41 8b 1f 4c 89 e0 48 c1 e8 RSP: 0018:ffffc90002f47288 EFLAGS: 00010203 RAX: 0000000000000001 RBX: ffff8881423c2368 RCX: 0000000000080000 RDX: ffffc9000c7ec000 RSI: 00000000000034e3 RDI: 00000000000034e4 RBP: ffffc90002f47570 R08: ffffffff8558fde3 R09: ffffffff855aed19 R10: 0000000000000002 R11: ffff888022be0000 R12: ffffc90002f47440 R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000000c FS: 0000000000000000(0000) GS:ffff888125099000(0063) knlGS:00000000f5096b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000031219ffc CR3: 000000005c7ea000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 55 push %rbp 1: 41 57 push %r15 3: 41 56 push %r14 5: 41 55 push %r13 7: 41 54 push %r12 9: 53 push %rbx a: 49 89 f6 mov %rsi,%r14 d: 49 89 fc mov %rdi,%r12 10: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13 17: fc ff df 1a: e8 cd 65 6a fc call 0xfc6a65ec 1f: 4d 8d 7e 0c lea 0xc(%r14),%r15 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 ca 02 00 00 jne 0x301 37: 41 8b 1f mov (%r15),%ebx 3a: 4c 89 e0 mov %r12,%rax 3d: 48 rex.W 3e: c1 .byte 0xc1 3f: e8 .byte 0xe8